git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1046 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/CMakeLists.txt

@@ -369,6 +369,7 @@ SET(IFC_SRCS
 	IFCGeometry.cpp
 	IFCMaterial.cpp
 	IFCProfile.cpp
+	IFCCurve.cpp
 	STEPFile.h
 	STEPFileReader.h
 	STEPFileReader.cpp

code/IFCCurve.cpp

@@ -0,0 +1,510 @@
+/*
+Open Asset Import Library (ASSIMP)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2010, ASSIMP Development Team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, 
+with or without modification, are permitted provided that the 
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the ASSIMP team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the ASSIMP Development Team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  IFCProfile.cpp
+ *  @brief Read profile and curves entities from IFC files
+ */
+
+#include "AssimpPCH.h"
+
+#ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
+#include "IFCUtil.h"
+
+namespace Assimp {
+	namespace IFC {
+		namespace {
+
+
+// --------------------------------------------------------------------------------
+// Conic is the base class for Circle and Ellipse
+// --------------------------------------------------------------------------------
+class Conic : public Curve
+{
+
+public:
+
+	// --------------------------------------------------
+	Conic(const IfcConic& entity, ConversionData& conv) 
+		: Curve(entity,conv)
+	{
+		aiMatrix4x4 trafo;
+		ConvertAxisPlacement(trafo,*entity.Position,conv);
+
+		// for convenience, extract the matrix rows
+		location = aiVector3D(trafo.a4,trafo.b4,trafo.c4);
+		p[0] = aiVector3D(trafo.a1,trafo.b1,trafo.c1);
+		p[1] = aiVector3D(trafo.a2,trafo.b2,trafo.c2);
+		p[2] = aiVector3D(trafo.a3,trafo.b3,trafo.c3);
+	}
+
+public:
+
+	// --------------------------------------------------
+	std::pair<float,float> GetParametricRange() const {
+		return std::make_pair(0.f,360.f);
+	}
+
+protected:
+	aiVector3D location, p[3];
+};
+
+
+// --------------------------------------------------------------------------------
+// Circle
+// --------------------------------------------------------------------------------
+class Circle : public Conic
+{
+
+public:
+
+	// --------------------------------------------------
+	Circle(const IfcCircle& entity, ConversionData& conv) 
+		: Conic(entity,conv)
+		, entity(entity)
+	{
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float u) const {
+		u = -conv.angle_scale * u;
+		return location + entity.Radius*(::cos(u)*p[0] + ::sin(u)*p[1]);
+	}
+
+private:
+	const IfcCircle& entity;
+};
+
+
+// --------------------------------------------------------------------------------
+// Ellipse
+// --------------------------------------------------------------------------------
+class Ellipse : public Conic
+{
+
+public:
+
+	// --------------------------------------------------
+	Ellipse(const IfcEllipse& entity, ConversionData& conv) 
+		: Conic(entity,conv)
+		, entity(entity)
+	{
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float u) const {
+		u = -conv.angle_scale * u;
+		return location + entity.SemiAxis1*::cos(u)*p[0] + entity.SemiAxis2*::sin(u)*p[1];
+	}
+
+private:
+	const IfcEllipse& entity;
+};
+
+
+// --------------------------------------------------------------------------------
+// Line
+// --------------------------------------------------------------------------------
+class Line : public Curve 
+{
+
+public:
+
+	// --------------------------------------------------
+	Line(const IfcLine& entity, ConversionData& conv) 
+		: Curve(entity,conv)
+		, entity(entity)
+	{
+		ConvertCartesianPoint(p,entity.Pnt);
+		ConvertVector(v,entity.Dir);
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float u) const {
+		return p + u*v;
+	}
+
+	// --------------------------------------------------
+	std::pair<float,float> GetParametricRange() const {
+		const float inf = std::numeric_limits<float>::infinity();
+
+		return std::make_pair(-inf,+inf);
+	}
+
+private:
+	const IfcLine& entity;
+	aiVector3D p,v;
+};
+
+// --------------------------------------------------------------------------------
+// CompositeCurve joins multiple smaller, bounded curves
+// --------------------------------------------------------------------------------
+class CompositeCurve : public BoundedCurve 
+{
+
+	// XXX the implementation currently ignores curve transitions
+
+public:
+
+	// --------------------------------------------------
+	CompositeCurve(const IfcCompositeCurve& entity, ConversionData& conv) 
+		: BoundedCurve(entity,conv)
+		, entity(entity)
+	{
+		curves.reserve(entity.Segments.size());
+		BOOST_FOREACH(const IfcCompositeCurveSegment& curveSegment,entity.Segments) {
+			// according to the specification, this must be a bounded curve
+			boost::shared_ptr< Curve > cv(Curve::Convert(curveSegment.ParentCurve,conv));
+			boost::shared_ptr< BoundedCurve > bc = boost::dynamic_pointer_cast<BoundedCurve>(cv);
+
+			if (!bc) {
+				IFCImporter::LogError("expected segment of composite curve to be a bounded curve");
+				continue;
+			}
+
+			if ( (std::string)curveSegment.Transition != "CONTINUOUS" ) {
+				IFCImporter::LogDebug("ignoring transition code on composite curve segment, only continuous transitions are supported");
+			}
+
+			curves.push_back(bc);
+		}
+
+		if (curves.empty()) {
+			IFCImporter::LogError("empty composite curve");
+			return;
+		}
+
+		total = 0.f;
+		BOOST_FOREACH(boost::shared_ptr< const BoundedCurve > curve, curves) {
+			const std::pair<float,float> range = curve->GetParametricRange();
+			total += range.second-range.first;
+		}
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float u) const {
+		if (curves.empty()) {
+			return aiVector3D();
+		}
+
+		float acc = 0;
+		BOOST_FOREACH(boost::shared_ptr< const BoundedCurve > curve, curves) {
+			const std::pair<float,float> range = curve->GetParametricRange();
+			const float delta = range.second-range.first;
+			if (u < acc+delta) {
+				return curve->Eval( (u-acc) + range.first );
+			}
+
+			acc += delta;
+		}
+		// clamp to end
+		return curves.back()->Eval(curves.back()->GetParametricRange().second);
+	}
+
+	// --------------------------------------------------
+	float SuggestNext(float u) const {
+
+		float acc = 0;
+		BOOST_FOREACH(boost::shared_ptr< const BoundedCurve > curve, curves) {
+			const std::pair<float,float> range = curve->GetParametricRange();
+			const float delta = range.second-range.first;
+			if (u < acc+delta) {
+				return curve->SuggestNext( (u-acc) + range.first ) - range.first + acc;
+			}
+			acc += delta;
+		}
+		return std::numeric_limits<float>::infinity();
+	}
+
+	// --------------------------------------------------
+	std::pair<float,float> GetParametricRange() const {
+		return std::make_pair(0.f,total);
+	}
+
+private:
+	const IfcCompositeCurve& entity;
+	std::vector< boost::shared_ptr< const BoundedCurve> > curves;
+
+	float total;
+};
+
+
+// --------------------------------------------------------------------------------
+// TrimmedCurve can be used to trim an unbounded curve to a bounded range
+// --------------------------------------------------------------------------------
+class TrimmedCurve : public BoundedCurve 
+{
+
+public:
+
+	// --------------------------------------------------
+	TrimmedCurve(const IfcTrimmedCurve& entity, ConversionData& conv) 
+		: BoundedCurve(entity,conv)
+		, entity(entity)
+	{
+		base = boost::shared_ptr<const Curve>(Curve::Convert(entity.BasisCurve,conv));
+
+		typedef boost::shared_ptr<const STEP::EXPRESS::DataType> Entry;
+	
+		// for some reason, trimmed curves can either specify a parametric value
+		// or a point on the curve, or both. And they can even specify which of the
+		// two representations they prefer, even though an information invariant
+		// claims that they must be identical if both are present.
+		// oh well.
+		bool ok = false;
+		BOOST_FOREACH(const Entry sel,entity.Trim1) {
+			if (const EXPRESS::REAL* const r = sel->ToPtr<EXPRESS::REAL>()) {
+				range.first = *r;
+				ok = true;
+				break;
+			}
+		}
+		if (!ok) {
+			IFCImporter::LogError("trimming by curve points not currently supported, skipping first cut point");
+			range.first = base->GetParametricRange().first;
+			if (range.first == std::numeric_limits<float>::infinity()) {
+				range.first = 0;
+			}
+		}
+		ok = false;
+		BOOST_FOREACH(const Entry sel,entity.Trim2) {
+			if (const EXPRESS::REAL* const r = sel->ToPtr<EXPRESS::REAL>()) {
+				range.second = *r;
+				ok = true;
+				break;
+			}
+		}
+		if (!ok) {
+			IFCImporter::LogError("trimming by curve points not currently supported, skipping second cut point");
+			range.second = base->GetParametricRange().second;
+			if (range.second == std::numeric_limits<float>::infinity()) {
+				range.second = 0;
+			}
+		}
+
+		maxval = range.second-range.first;
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float p) const {
+		p = std::min(range.second, std::max(range.first+p,range.first));
+		if (!IsTrue(entity.SenseAgreement)) {
+			p = range.second - (p-range.first);
+		}
+		return base->Eval( p );
+	}
+
+	// --------------------------------------------------
+	float SuggestNext(float u) const {
+		if (u >= maxval) {
+			return std::numeric_limits<float>::infinity();
+		}
+
+		if (const Line* const l = dynamic_cast<const Line*>(base.get())) {
+			// a line is, well, a line .. so two points are always sufficient to represent it
+			return maxval;
+		}
+
+		if (const Conic* const l = dynamic_cast<const Conic*>(base.get())) {
+			// the suitable sampling density for conics is a configuration property
+			return std::min(maxval, static_cast<float>( u + maxval/ceil(maxval/conv.settings.conicSamplingAngle)) );
+		}
+		
+		return BoundedCurve::SuggestNext(u);
+	}
+
+	// --------------------------------------------------
+	std::pair<float,float> GetParametricRange() const {
+		return std::make_pair(0,maxval);
+	}
+
+private:
+	const IfcTrimmedCurve& entity;
+	std::pair<float,float> range;
+	float maxval;
+
+	boost::shared_ptr<const Curve> base;
+};
+
+
+// --------------------------------------------------------------------------------
+// PolyLine is a 'curve' defined by linear interpolation over a set of discrete points
+// --------------------------------------------------------------------------------
+class PolyLine : public BoundedCurve 
+{
+
+public:
+
+	// --------------------------------------------------
+	PolyLine(const IfcPolyline& entity, ConversionData& conv) 
+		: BoundedCurve(entity,conv)
+		, entity(entity)
+	{
+		points.reserve(entity.Points.size());
+
+		aiVector3D t;
+		BOOST_FOREACH(const IfcCartesianPoint& cp, entity.Points) {
+			ConvertCartesianPoint(t,cp);
+			points.push_back(t);
+		}
+	}
+
+public:
+
+	// --------------------------------------------------
+	aiVector3D Eval(float p) const {
+		if (p < 0.f) {
+			return points.front();
+		}
+		const size_t b = static_cast<size_t>(floor(p));  
+		if (b >= points.size()-1) {
+			return points.back();
+		}
+
+		const float d = p-static_cast<float>(b);
+		return points[b+1] * d + points[b] * (1.f-d);
+	}
+
+	// --------------------------------------------------
+	float SuggestNext(float u) const {
+		if (u > points.size()-1) {
+			return std::numeric_limits<float>::infinity();
+		}
+		return ::floor(u)+1;
+	}
+
+	// --------------------------------------------------
+	std::pair<float,float> GetParametricRange() const {
+		return std::make_pair(0.f,static_cast<float>(points.size()-1));
+	}
+
+private:
+	const IfcPolyline& entity;
+	std::vector<aiVector3D> points;
+};
+
+
+} // anon
+
+
+// ------------------------------------------------------------------------------------------------
+Curve* Curve :: Convert(const IFC::IfcCurve& curve,ConversionData& conv) 
+{
+	if(curve.ToPtr<IfcBoundedCurve>()) {
+		if(const IfcPolyline* c = curve.ToPtr<IfcPolyline>()) {
+			return new PolyLine(*c,conv);
+		}
+		if(const IfcTrimmedCurve* c = curve.ToPtr<IfcTrimmedCurve>()) {
+			return new TrimmedCurve(*c,conv);
+		}
+		if(const IfcCompositeCurve* c = curve.ToPtr<IfcCompositeCurve>()) {
+			return new CompositeCurve(*c,conv);
+		}
+		//if(const IfcBSplineCurve* c = curve.ToPtr<IfcBSplineCurve>()) {
+		//	return new BSplineCurve(*c,conv);
+		//}
+	}
+
+	if(curve.ToPtr<IfcConic>()) {
+		if(const IfcCircle* c = curve.ToPtr<IfcCircle>()) {
+			return new Circle(*c,conv);
+		}
+		if(const IfcEllipse* c = curve.ToPtr<IfcEllipse>()) {
+			return new Ellipse(*c,conv);
+		}
+	}
+
+	if(const IfcLine* c = curve.ToPtr<IfcLine>()) {
+		return new Line(*c,conv);
+	}
+
+	// XXX OffsetCurve2D, OffsetCurve3D not currently supported
+	return NULL;
+}
+
+// ------------------------------------------------------------------------------------------------
+float BoundedCurve :: SuggestNext(float u) const
+{
+	// the default behavior is to subdivide each curve into approximately 32 linear segments
+	const unsigned int segments = 32;
+
+	const std::pair<float,float> range = GetParametricRange();
+	const float delta = range.second - range.first, perseg = delta/segments;
+
+	if (u < range.first) {
+		return range.first;
+	}
+
+	u = u+perseg;
+	if (u > range.second) {
+		return std::numeric_limits<float>::infinity();
+	}
+
+	return u;
+}
+
+// ------------------------------------------------------------------------------------------------
+void BoundedCurve :: SampleDiscrete(TempMesh& out) const
+{
+	const std::pair<float,float> range = GetParametricRange();
+	const float inf = std::numeric_limits<float>::infinity();
+
+	size_t cnt = 0;
+	float u = range.first;
+	do ++cnt; while( (u = SuggestNext(u)) != inf );
+	out.verts.reserve(cnt);
+
+	u = range.first;
+	do out.verts.push_back(Eval(u)); while( (u = SuggestNext(u)) != inf );
+}
+
+} // IFC
+} // Assimp
+
+#endif // ASSIMP_BUILD_NO_IFC_IMPORTER

code/IFCGeometry.cpp

@@ -49,6 +49,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "PolyTools.h"
 #include "ProcessHelper.h"
 
+#include <iterator>
+
 namespace Assimp {
 	namespace IFC {
 
@@ -1139,7 +1141,7 @@ void ProcessSweptAreaSolid(const IfcSweptAreaSolid& swept, TempMesh& meshout, Co
 // ------------------------------------------------------------------------------------------------
 void ProcessBoolean(const IfcBooleanResult& boolean, TempMesh& result, ConversionData& conv)
 {
-	if(const IfcBooleanClippingResult* const clip = boolean.ToPtr<IfcBooleanClippingResult>()) {
+	if(const IfcBooleanResult* const clip = boolean.ToPtr<IfcBooleanResult>()) {
 		if(clip->Operator != "DIFFERENCE") {
 			IFCImporter::LogWarn("encountered unsupported boolean operator: " + (std::string)clip->Operator);
 			return;

code/IFCLoader.cpp

@@ -139,6 +139,7 @@ void IFCImporter::SetupProperties(const Importer* pImp)
 	settings.skipCurveRepresentations = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_SKIP_CURVE_REPRESENTATIONS,true);
 	settings.useCustomTriangulation = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_CUSTOM_TRIANGULATION,true);
 
+	settings.conicSamplingAngle = 10.f;
 	settings.skipAnnotations = true;
 }
 
@@ -354,7 +355,7 @@ bool ProcessMappedItem(const IfcMappedItem& mapped, aiNode* nd_src, std::vector<
 	std::auto_ptr<aiNode> nd(new aiNode());
 	nd->mName.Set("IfcMappedItem");
 		
-	// handle the cartesian operator
+	// handle the Cartesian operator
 	aiMatrix4x4 m;
 	ConvertTransformOperator(m, *mapped.MappingTarget);
 
@@ -378,7 +379,7 @@ bool ProcessMappedItem(const IfcMappedItem& mapped, aiNode* nd_src, std::vector<
 	bool got = false;
 	BOOST_FOREACH(const IfcRepresentationItem& item, repr.Items) {
 		if(!ProcessRepresentationItem(item,meshes,conv)) {
-			IFCImporter::LogWarn("skipping unknown mapped entity, type is " + item.GetClassName());
+			IFCImporter::LogWarn("skipping mapped entity of type " + item.GetClassName() + ", no representations could be generated");
 		}
 		else got = true;
 	}

code/IFCLoader.h

@@ -107,7 +107,7 @@ private:
 public: 
 
 
-	// loader settings, publicy accessible via their corresponding AI_CONFIG constants
+	// loader settings, publicly accessible via their corresponding AI_CONFIG constants
 	struct Settings 
 	{
 		Settings()
@@ -115,6 +115,7 @@ public:
 			, skipCurveRepresentations()
 			, useCustomTriangulation()
 			, skipAnnotations()
+			, conicSamplingAngle(10.f)
 		{}
 
 
@@ -122,6 +123,7 @@ public:
 		bool skipCurveRepresentations;
 		bool useCustomTriangulation;
 		bool skipAnnotations;
+		float conicSamplingAngle;
 	};
 	
 	

code/IFCProfile.cpp

@@ -65,14 +65,21 @@ void ProcessPolyLine(const IfcPolyline& def, TempMesh& meshout, ConversionData&
 // ------------------------------------------------------------------------------------------------
 bool ProcessCurve(const IfcCurve& curve,  TempMesh& meshout, ConversionData& conv)
 {
-	if(const IfcPolyline* poly = curve.ToPtr<IfcPolyline>()) {
-		ProcessPolyLine(*poly,meshout,conv);
-	}
-	else {
+	boost::scoped_ptr<const Curve> cv(Curve::Convert(curve,conv));
+	if (!cv) {
 		IFCImporter::LogWarn("skipping unknown IfcCurve entity, type is " + curve.GetClassName());
 		return false;
 	}
-	return true;
+
+	// we must have a bounded curve at this point
+	if (const BoundedCurve* bc = dynamic_cast<const BoundedCurve*>(cv.get())) {
+		bc->SampleDiscrete(meshout);
+		meshout.vertcnt.push_back(meshout.verts.size());
+		return true;
+	}
+
+	IFCImporter::LogError("cannot use unbounded curve as profile");
+	return false;
 }
 
 // ------------------------------------------------------------------------------------------------

code/IFCReaderGen.cpp

@@ -553,7 +553,7 @@ namespace {
 ,		SchemaEntry("ifcstructuralpointaction",&STEP::ObjectHelper<IfcStructuralPointAction,0>::Construct )
 ,		SchemaEntry("ifcspatialstructureelement",&STEP::ObjectHelper<IfcSpatialStructureElement,2>::Construct )
 ,		SchemaEntry("ifcspace",&STEP::ObjectHelper<IfcSpace,2>::Construct )
-,		SchemaEntry("ifccontextdependentunit",&STEP::ObjectHelper<NotImplemented,0>::Construct )
+,		SchemaEntry("ifccontextdependentunit",&STEP::ObjectHelper<IfcContextDependentUnit,1>::Construct )
 ,		SchemaEntry("ifcvirtualgridintersection",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcrelassociates",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcrelassociatesclassification",&STEP::ObjectHelper<NotImplemented,0>::Construct )
@@ -643,7 +643,7 @@ namespace {
 ,		SchemaEntry("ifcdistributioncontrolelement",&STEP::ObjectHelper<IfcDistributionControlElement,1>::Construct )
 ,		SchemaEntry("ifctransformertype",&STEP::ObjectHelper<IfcTransformerType,1>::Construct )
 ,		SchemaEntry("ifclaborresource",&STEP::ObjectHelper<IfcLaborResource,1>::Construct )
-,		SchemaEntry("ifcderivedprofiledef",&STEP::ObjectHelper<NotImplemented,0>::Construct )
+,		SchemaEntry("ifcderivedprofiledef",&STEP::ObjectHelper<IfcDerivedProfileDef,3>::Construct )
 ,		SchemaEntry("ifcrelconnectsstructuralmember",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcrelconnectswitheccentricity",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcfurniturestandard",&STEP::ObjectHelper<IfcFurnitureStandard,0>::Construct )
@@ -750,7 +750,7 @@ namespace {
 ,		SchemaEntry("ifcsubcontractresource",&STEP::ObjectHelper<IfcSubContractResource,2>::Construct )
 ,		SchemaEntry("ifctimeseriesreferencerelationship",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcsweptdisksolid",&STEP::ObjectHelper<IfcSweptDiskSolid,5>::Construct )
-,		SchemaEntry("ifccompositeprofiledef",&STEP::ObjectHelper<NotImplemented,0>::Construct )
+,		SchemaEntry("ifccompositeprofiledef",&STEP::ObjectHelper<IfcCompositeProfileDef,2>::Construct )
 ,		SchemaEntry("ifcelectricalbaseproperties",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcpredefinedpointmarkersymbol",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifctanktype",&STEP::ObjectHelper<IfcTankType,1>::Construct )
@@ -817,7 +817,7 @@ namespace {
 ,		SchemaEntry("ifctextstyletextmodel",&STEP::ObjectHelper<NotImplemented,0>::Construct )
 ,		SchemaEntry("ifcprojectioncurve",&STEP::ObjectHelper<IfcProjectionCurve,0>::Construct )
 ,		SchemaEntry("ifcfillareastyletiles",&STEP::ObjectHelper<IfcFillAreaStyleTiles,3>::Construct )
-,		SchemaEntry("ifcrelfillselement",&STEP::ObjectHelper<NotImplemented,0>::Construct )
+,		SchemaEntry("ifcrelfillselement",&STEP::ObjectHelper<IfcRelFillsElement,2>::Construct )
 ,		SchemaEntry("ifcelectricmotortype",&STEP::ObjectHelper<IfcElectricMotorType,1>::Construct )
 ,		SchemaEntry("ifctendon",&STEP::ObjectHelper<IfcTendon,8>::Construct )
 ,		SchemaEntry("ifcdistributionchamberelementtype",&STEP::ObjectHelper<IfcDistributionChamberElementType,1>::Construct )
@@ -1045,7 +1045,7 @@ void IFC::GetSchema(EXPRESS::ConversionSchema& out)
 namespace STEP {
 
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<NotImplemented>(const STEP::DB& /*db*/, const LIST& /*params*/, NotImplemented* /*in*/)
+template <> size_t GenericFill<NotImplemented>(const STEP::DB& db, const LIST& params, NotImplemented* in)
 {
 	return 0;
 }
@@ -1166,16 +1166,16 @@ template <> size_t GenericFill<IfcGrid>(const DB& db, const LIST& params, IfcGri
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<IfcRepresentationItem>(const DB& /*db*/, const LIST& params, IfcRepresentationItem* /*in*/)
+template <> size_t GenericFill<IfcRepresentationItem>(const DB& db, const LIST& params, IfcRepresentationItem* in)
 {
 	size_t base = 0;
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcRepresentationItem"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcGeometricRepresentationItem>(const DB& db, const LIST& params, IfcGeometricRepresentationItem* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcGeometricRepresentationItem"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcOneDirectionRepeatFactor>(const DB& db, const LIST& params, IfcOneDirectionRepeatFactor* in)
@@ -1278,7 +1278,7 @@ template <> size_t GenericFill<IfcRectangularPyramid>(const DB& db, const LIST&
 template <> size_t GenericFill<IfcSurface>(const DB& db, const LIST& params, IfcSurface* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcSurface"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcBoundedSurface>(const DB& db, const LIST& params, IfcBoundedSurface* in)
@@ -1553,20 +1553,29 @@ template <> size_t GenericFill<IfcArbitraryClosedProfileDef>(const DB& db, const
 template <> size_t GenericFill<IfcCurve>(const DB& db, const LIST& params, IfcCurve* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcCurve"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcConic>(const DB& db, const LIST& params, IfcConic* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcCurve*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 1) { throw STEP::TypeError("expected 1 arguments to IfcConic"); }    do { // convert the 'Position' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcConic,1>::aux_is_derived[0]=true; break; }
+        try { GenericConvert( in->Position, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcConic to be a `IfcAxis2Placement`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcCircle>(const DB& db, const LIST& params, IfcCircle* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcConic*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcCircle"); }    do { // convert the 'Radius' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Radius, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcCircle to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -1653,7 +1662,7 @@ template <> size_t GenericFill<IfcStructuralPlanarAction>(const DB& db, const LI
 template <> size_t GenericFill<IfcTopologicalRepresentationItem>(const DB& db, const LIST& params, IfcTopologicalRepresentationItem* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcTopologicalRepresentationItem"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcConnectedFaceSet>(const DB& db, const LIST& params, IfcConnectedFaceSet* in)
@@ -1706,7 +1715,16 @@ template <> size_t GenericFill<IfcProcedure>(const DB& db, const LIST& params, I
 template <> size_t GenericFill<IfcVector>(const DB& db, const LIST& params, IfcVector* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcVector"); }    do { // convert the 'Orientation' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Orientation, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcVector to be a `IfcDirection`")); }
+    } while(0);
+    do { // convert the 'Magnitude' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Magnitude, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcVector to be a `IfcLengthMeasure`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -1731,8 +1749,7 @@ template <> size_t GenericFill<IfcFaceBound>(const DB& db, const LIST& params, I
 template <> size_t GenericFill<IfcFaceOuterBound>(const DB& db, const LIST& params, IfcFaceOuterBound* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcFaceBound*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
-	return base;
+	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcFaceOuterBound"); }	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcFeatureElementAddition>(const DB& db, const LIST& params, IfcFeatureElementAddition* in)
@@ -1748,11 +1765,7 @@ template <> size_t GenericFill<IfcNamedUnit>(const DB& db, const LIST& params, I
 	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcNamedUnit"); }    do { // convert the 'Dimensions' argument
         boost::shared_ptr<const DataType> arg = params[base++];
         if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcNamedUnit,2>::aux_is_derived[0]=true; break; }
-		if (dynamic_cast<const UNSET*>(&*arg)) {
-			// (hack) allow this - I found some Ifc files which violate the spec here
-			break;
-		}
-		try { GenericConvert( in->Dimensions, arg, db ); break; } 
+        try { GenericConvert( in->Dimensions, arg, db ); break; } 
         catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcNamedUnit to be a `IfcDimensionalExponents`")); }
     } while(0);
     do { // convert the 'UnitType' argument
@@ -1857,7 +1870,16 @@ template <> size_t GenericFill<IfcProxy>(const DB& db, const LIST& params, IfcPr
 template <> size_t GenericFill<IfcLine>(const DB& db, const LIST& params, IfcLine* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcCurve*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcLine"); }    do { // convert the 'Pnt' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Pnt, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcLine to be a `IfcCartesianPoint`")); }
+    } while(0);
+    do { // convert the 'Dir' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Dir, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcLine to be a `IfcVector`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -1868,10 +1890,9 @@ template <> size_t GenericFill<IfcColumn>(const DB& db, const LIST& params, IfcC
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<IfcObjectPlacement>(const DB& /*db*/, const LIST& params, IfcObjectPlacement* /*in*/)
+template <> size_t GenericFill<IfcObjectPlacement>(const DB& db, const LIST& params, IfcObjectPlacement* in)
 {
 	size_t base = 0;
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcObjectPlacement"); }	
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -1898,8 +1919,7 @@ template <> size_t GenericFill<IfcRelConnects>(const DB& db, const LIST& params,
 template <> size_t GenericFill<IfcAnnotation>(const DB& db, const LIST& params, IfcAnnotation* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcProduct*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
-	return base;
+	if (params.GetSize() < 7) { throw STEP::TypeError("expected 7 arguments to IfcAnnotation"); }	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcPlate>(const DB& db, const LIST& params, IfcPlate* in)
@@ -1912,7 +1932,7 @@ template <> size_t GenericFill<IfcPlate>(const DB& db, const LIST& params, IfcPl
 template <> size_t GenericFill<IfcSolidModel>(const DB& db, const LIST& params, IfcSolidModel* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcSolidModel"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcManifoldSolidBrep>(const DB& db, const LIST& params, IfcManifoldSolidBrep* in)
@@ -2033,7 +2053,7 @@ template <> size_t GenericFill<IfcDimensionCurve>(const DB& db, const LIST& para
 template <> size_t GenericFill<IfcBoundedCurve>(const DB& db, const LIST& params, IfcBoundedCurve* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcCurve*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcBoundedCurve"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcAxis1Placement>(const DB& db, const LIST& params, IfcAxis1Placement* in)
@@ -2091,6 +2111,13 @@ template <> size_t GenericFill<IfcSpace>(const DB& db, const LIST& params, IfcSp
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
+template <> size_t GenericFill<IfcContextDependentUnit>(const DB& db, const LIST& params, IfcContextDependentUnit* in)
+{
+	size_t base = GenericFill(db,params,static_cast<IfcNamedUnit*>(in));
+// this data structure is not used yet, so there is no code generated to fill its members
+	return base;
+}
+// -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcCoolingTowerType>(const DB& db, const LIST& params, IfcCoolingTowerType* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcEnergyConversionDeviceType*>(in));
@@ -2238,7 +2265,18 @@ template <> size_t GenericFill<IfcRamp>(const DB& db, const LIST& params, IfcRam
 template <> size_t GenericFill<IfcCompositeCurve>(const DB& db, const LIST& params, IfcCompositeCurve* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcBoundedCurve*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 2) { throw STEP::TypeError("expected 2 arguments to IfcCompositeCurve"); }    do { // convert the 'Segments' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcCompositeCurve,2>::aux_is_derived[0]=true; break; }
+        try { GenericConvert( in->Segments, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcCompositeCurve to be a `LIST [1:?] OF IfcCompositeCurveSegment`")); }
+    } while(0);
+    do { // convert the 'SelfIntersect' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcCompositeCurve,2>::aux_is_derived[1]=true; break; }
+        try { GenericConvert( in->SelfIntersect, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcCompositeCurve to be a `LOGICAL`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -2611,6 +2649,13 @@ template <> size_t GenericFill<IfcLaborResource>(const DB& db, const LIST& param
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
+template <> size_t GenericFill<IfcDerivedProfileDef>(const DB& db, const LIST& params, IfcDerivedProfileDef* in)
+{
+	size_t base = GenericFill(db,params,static_cast<IfcProfileDef*>(in));
+// this data structure is not used yet, so there is no code generated to fill its members
+	return base;
+}
+// -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcFurnitureStandard>(const DB& db, const LIST& params, IfcFurnitureStandard* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcControl*>(in));
@@ -2758,7 +2803,36 @@ template <> size_t GenericFill<IfcProjectOrder>(const DB& db, const LIST& params
 template <> size_t GenericFill<IfcBSplineCurve>(const DB& db, const LIST& params, IfcBSplineCurve* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcBoundedCurve*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 5) { throw STEP::TypeError("expected 5 arguments to IfcBSplineCurve"); }    do { // convert the 'Degree' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcBSplineCurve,5>::aux_is_derived[0]=true; break; }
+        try { GenericConvert( in->Degree, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcBSplineCurve to be a `INTEGER`")); }
+    } while(0);
+    do { // convert the 'ControlPointsList' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcBSplineCurve,5>::aux_is_derived[1]=true; break; }
+        try { GenericConvert( in->ControlPointsList, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcBSplineCurve to be a `LIST [2:?] OF IfcCartesianPoint`")); }
+    } while(0);
+    do { // convert the 'CurveForm' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcBSplineCurve,5>::aux_is_derived[2]=true; break; }
+        try { GenericConvert( in->CurveForm, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 2 to IfcBSplineCurve to be a `IfcBSplineCurveForm`")); }
+    } while(0);
+    do { // convert the 'ClosedCurve' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcBSplineCurve,5>::aux_is_derived[3]=true; break; }
+        try { GenericConvert( in->ClosedCurve, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 3 to IfcBSplineCurve to be a `LOGICAL`")); }
+    } while(0);
+    do { // convert the 'SelfIntersect' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const ISDERIVED*>(&*arg)) { in->ObjectHelper<Assimp::IFC::IfcBSplineCurve,5>::aux_is_derived[4]=true; break; }
+        try { GenericConvert( in->SelfIntersect, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 4 to IfcBSplineCurve to be a `LOGICAL`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -2793,7 +2867,36 @@ template <> size_t GenericFill<IfcElectricDistributionPoint>(const DB& db, const
 template <> size_t GenericFill<IfcSite>(const DB& db, const LIST& params, IfcSite* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcSpatialStructureElement*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 14) { throw STEP::TypeError("expected 14 arguments to IfcSite"); }    do { // convert the 'RefLatitude' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->RefLatitude, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 9 to IfcSite to be a `IfcCompoundPlaneAngleMeasure`")); }
+    } while(0);
+    do { // convert the 'RefLongitude' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->RefLongitude, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 10 to IfcSite to be a `IfcCompoundPlaneAngleMeasure`")); }
+    } while(0);
+    do { // convert the 'RefElevation' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->RefElevation, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 11 to IfcSite to be a `IfcLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'LandTitleNumber' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->LandTitleNumber, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 12 to IfcSite to be a `IfcLabel`")); }
+    } while(0);
+    do { // convert the 'SiteAddress' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->SiteAddress, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 13 to IfcSite to be a `IfcPostalAddress`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -3002,7 +3105,7 @@ template <> size_t GenericFill<IfcStructuralSurfaceMemberVarying>(const DB& db,
 template <> size_t GenericFill<IfcPoint>(const DB& db, const LIST& params, IfcPoint* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcPoint"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcSurfaceOfRevolution>(const DB& db, const LIST& params, IfcSurfaceOfRevolution* in)
@@ -3194,7 +3297,7 @@ template <> size_t GenericFill<IfcLightSourceDirectional>(const DB& db, const LI
 template <> size_t GenericFill<IfcLoop>(const DB& db, const LIST& params, IfcLoop* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcTopologicalRepresentationItem*>(in));
-	if (params.GetSize() < 0) { throw STEP::TypeError("expected 0 arguments to IfcLoop"); }	return base;
+	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcVertexLoop>(const DB& db, const LIST& params, IfcVertexLoop* in)
@@ -3276,6 +3379,13 @@ template <> size_t GenericFill<IfcSweptDiskSolid>(const DB& db, const LIST& para
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
+template <> size_t GenericFill<IfcCompositeProfileDef>(const DB& db, const LIST& params, IfcCompositeProfileDef* in)
+{
+	size_t base = GenericFill(db,params,static_cast<IfcProfileDef*>(in));
+// this data structure is not used yet, so there is no code generated to fill its members
+	return base;
+}
+// -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcTankType>(const DB& db, const LIST& params, IfcTankType* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcFlowStorageDeviceType*>(in));
@@ -3339,7 +3449,24 @@ template <> size_t GenericFill<IfcTopologyRepresentation>(const DB& db, const LI
 template <> size_t GenericFill<IfcBuilding>(const DB& db, const LIST& params, IfcBuilding* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcSpatialStructureElement*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 12) { throw STEP::TypeError("expected 12 arguments to IfcBuilding"); }    do { // convert the 'ElevationOfRefHeight' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->ElevationOfRefHeight, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 9 to IfcBuilding to be a `IfcLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'ElevationOfTerrain' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->ElevationOfTerrain, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 10 to IfcBuilding to be a `IfcLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'BuildingAddress' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        if (dynamic_cast<const UNSET*>(&*arg)) break;
+        try { GenericConvert( in->BuildingAddress, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 11 to IfcBuilding to be a `IfcPostalAddress`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -3525,6 +3652,22 @@ template <> size_t GenericFill<IfcFillAreaStyleTiles>(const DB& db, const LIST&
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
+template <> size_t GenericFill<IfcRelFillsElement>(const DB& db, const LIST& params, IfcRelFillsElement* in)
+{
+	size_t base = GenericFill(db,params,static_cast<IfcRelConnects*>(in));
+	if (params.GetSize() < 6) { throw STEP::TypeError("expected 6 arguments to IfcRelFillsElement"); }    do { // convert the 'RelatingOpeningElement' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->RelatingOpeningElement, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 4 to IfcRelFillsElement to be a `IfcOpeningElement`")); }
+    } while(0);
+    do { // convert the 'RelatedBuildingElement' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->RelatedBuildingElement, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 5 to IfcRelFillsElement to be a `IfcElement`")); }
+    } while(0);
+	return base;
+}
+// -----------------------------------------------------------------------------------------------------------
 template <> size_t GenericFill<IfcElectricMotorType>(const DB& db, const LIST& params, IfcElectricMotorType* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcEnergyConversionDeviceType*>(in));
@@ -3651,7 +3794,26 @@ template <> size_t GenericFill<IfcUnitAssignment>(const DB& db, const LIST& para
 template <> size_t GenericFill<IfcBoundingBox>(const DB& db, const LIST& params, IfcBoundingBox* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 4) { throw STEP::TypeError("expected 4 arguments to IfcBoundingBox"); }    do { // convert the 'Corner' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Corner, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcBoundingBox to be a `IfcCartesianPoint`")); }
+    } while(0);
+    do { // convert the 'XDim' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->XDim, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcBoundingBox to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'YDim' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->YDim, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 2 to IfcBoundingBox to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'ZDim' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->ZDim, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 3 to IfcBoundingBox to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -4142,7 +4304,21 @@ template <> size_t GenericFill<IfcAnnotationSurface>(const DB& db, const LIST& p
 template <> size_t GenericFill<IfcCompositeCurveSegment>(const DB& db, const LIST& params, IfcCompositeCurveSegment* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 3) { throw STEP::TypeError("expected 3 arguments to IfcCompositeCurveSegment"); }    do { // convert the 'Transition' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Transition, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcCompositeCurveSegment to be a `IfcTransitionCode`")); }
+    } while(0);
+    do { // convert the 'SameSense' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->SameSense, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcCompositeCurveSegment to be a `BOOLEAN`")); }
+    } while(0);
+    do { // convert the 'ParentCurve' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->ParentCurve, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 2 to IfcCompositeCurveSegment to be a `IfcCurve`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -4170,7 +4346,31 @@ template <> size_t GenericFill<IfcVibrationIsolatorType>(const DB& db, const LIS
 template <> size_t GenericFill<IfcTrimmedCurve>(const DB& db, const LIST& params, IfcTrimmedCurve* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcBoundedCurve*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 5) { throw STEP::TypeError("expected 5 arguments to IfcTrimmedCurve"); }    do { // convert the 'BasisCurve' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->BasisCurve, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcTrimmedCurve to be a `IfcCurve`")); }
+    } while(0);
+    do { // convert the 'Trim1' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Trim1, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcTrimmedCurve to be a `SET [1:2] OF IfcTrimmingSelect`")); }
+    } while(0);
+    do { // convert the 'Trim2' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->Trim2, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 2 to IfcTrimmedCurve to be a `SET [1:2] OF IfcTrimmingSelect`")); }
+    } while(0);
+    do { // convert the 'SenseAgreement' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->SenseAgreement, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 3 to IfcTrimmedCurve to be a `BOOLEAN`")); }
+    } while(0);
+    do { // convert the 'MasterRepresentation' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->MasterRepresentation, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 4 to IfcTrimmedCurve to be a `IfcTrimmingPreference`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -4327,7 +4527,16 @@ template <> size_t GenericFill<IfcDoor>(const DB& db, const LIST& params, IfcDoo
 template <> size_t GenericFill<IfcEllipse>(const DB& db, const LIST& params, IfcEllipse* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcConic*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 3) { throw STEP::TypeError("expected 3 arguments to IfcEllipse"); }    do { // convert the 'SemiAxis1' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->SemiAxis1, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 1 to IfcEllipse to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
+    do { // convert the 'SemiAxis2' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->SemiAxis2, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 2 to IfcEllipse to be a `IfcPositiveLengthMeasure`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
@@ -4348,7 +4557,11 @@ template <> size_t GenericFill<IfcAngularDimension>(const DB& db, const LIST& pa
 template <> size_t GenericFill<IfcFaceBasedSurfaceModel>(const DB& db, const LIST& params, IfcFaceBasedSurfaceModel* in)
 {
 	size_t base = GenericFill(db,params,static_cast<IfcGeometricRepresentationItem*>(in));
-// this data structure is not used yet, so there is no code generated to fill its members
+	if (params.GetSize() < 1) { throw STEP::TypeError("expected 1 arguments to IfcFaceBasedSurfaceModel"); }    do { // convert the 'FbsmFaces' argument
+        boost::shared_ptr<const DataType> arg = params[base++];
+        try { GenericConvert( in->FbsmFaces, arg, db ); break; } 
+        catch (const TypeError& t) { throw TypeError(t.what() + std::string(" - expected argument 0 to IfcFaceBasedSurfaceModel to be a `SET [1:?] OF IfcConnectedFaceSet`")); }
+    } while(0);
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------

code/IFCReaderGen.h

@@ -893,7 +893,7 @@ namespace IFC {
 	struct IfcStructuralPointAction;
 	struct IfcSpatialStructureElement;
 	struct IfcSpace;
-	typedef NotImplemented IfcContextDependentUnit; // (not currently used by Assimp)
+	struct IfcContextDependentUnit;
 	typedef NotImplemented IfcVirtualGridIntersection; // (not currently used by Assimp)
 	typedef NotImplemented IfcRelAssociates; // (not currently used by Assimp)
 	typedef NotImplemented IfcRelAssociatesClassification; // (not currently used by Assimp)
@@ -983,7 +983,7 @@ namespace IFC {
 	struct IfcDistributionControlElement;
 	struct IfcTransformerType;
 	struct IfcLaborResource;
-	typedef NotImplemented IfcDerivedProfileDef; // (not currently used by Assimp)
+	struct IfcDerivedProfileDef;
 	typedef NotImplemented IfcRelConnectsStructuralMember; // (not currently used by Assimp)
 	typedef NotImplemented IfcRelConnectsWithEccentricity; // (not currently used by Assimp)
 	struct IfcFurnitureStandard;
@@ -1090,7 +1090,7 @@ namespace IFC {
 	struct IfcSubContractResource;
 	typedef NotImplemented IfcTimeSeriesReferenceRelationship; // (not currently used by Assimp)
 	struct IfcSweptDiskSolid;
-	typedef NotImplemented IfcCompositeProfileDef; // (not currently used by Assimp)
+	struct IfcCompositeProfileDef;
 	typedef NotImplemented IfcElectricalBaseProperties; // (not currently used by Assimp)
 	typedef NotImplemented IfcPreDefinedPointMarkerSymbol; // (not currently used by Assimp)
 	struct IfcTankType;
@@ -1157,7 +1157,7 @@ namespace IFC {
 	typedef NotImplemented IfcTextStyleTextModel; // (not currently used by Assimp)
 	struct IfcProjectionCurve;
 	struct IfcFillAreaStyleTiles;
-	typedef NotImplemented IfcRelFillsElement; // (not currently used by Assimp)
+	struct IfcRelFillsElement;
 	struct IfcElectricMotorType;
 	struct IfcTendon;
 	struct IfcDistributionChamberElementType;
@@ -2014,6 +2014,11 @@ namespace IFC {
 		Maybe< IfcLengthMeasure::Out > ElevationWithFlooring;
     };
 
+    // C++ wrapper for IfcContextDependentUnit
+    struct IfcContextDependentUnit : IfcNamedUnit, ObjectHelper<IfcContextDependentUnit,1> { IfcContextDependentUnit() : Object("IfcContextDependentUnit") {}
+		IfcLabel::Out Name;
+    };
+
     // C++ wrapper for IfcCoolingTowerType
     struct IfcCoolingTowerType : IfcEnergyConversionDeviceType, ObjectHelper<IfcCoolingTowerType,1> { IfcCoolingTowerType() : Object("IfcCoolingTowerType") {}
 		IfcCoolingTowerTypeEnum::Out PredefinedType;
@@ -2342,6 +2347,13 @@ namespace IFC {
 		Maybe< IfcText::Out > SkillSet;
     };
 
+    // C++ wrapper for IfcDerivedProfileDef
+    struct IfcDerivedProfileDef : IfcProfileDef, ObjectHelper<IfcDerivedProfileDef,3> { IfcDerivedProfileDef() : Object("IfcDerivedProfileDef") {}
+		Lazy< IfcProfileDef > ParentProfile;
+		Lazy< IfcCartesianTransformationOperator2D > Operator;
+		Maybe< IfcLabel::Out > Label;
+    };
+
     // C++ wrapper for IfcFurnitureStandard
     struct IfcFurnitureStandard : IfcControl, ObjectHelper<IfcFurnitureStandard,0> { IfcFurnitureStandard() : Object("IfcFurnitureStandard") {}
 
@@ -2792,6 +2804,12 @@ namespace IFC {
 		IfcParameterValue::Out EndParam;
     };
 
+    // C++ wrapper for IfcCompositeProfileDef
+    struct IfcCompositeProfileDef : IfcProfileDef, ObjectHelper<IfcCompositeProfileDef,2> { IfcCompositeProfileDef() : Object("IfcCompositeProfileDef") {}
+		ListOf< Lazy< IfcProfileDef >, 2, 0 > Profiles;
+		Maybe< IfcLabel::Out > Label;
+    };
+
     // C++ wrapper for IfcTankType
     struct IfcTankType : IfcFlowStorageDeviceType, ObjectHelper<IfcTankType,1> { IfcTankType() : Object("IfcTankType") {}
 		IfcTankTypeEnum::Out PredefinedType;
@@ -2979,6 +2997,12 @@ namespace IFC {
 		IfcPositiveRatioMeasure::Out TilingScale;
     };
 
+    // C++ wrapper for IfcRelFillsElement
+    struct IfcRelFillsElement : IfcRelConnects, ObjectHelper<IfcRelFillsElement,2> { IfcRelFillsElement() : Object("IfcRelFillsElement") {}
+		Lazy< IfcOpeningElement > RelatingOpeningElement;
+		Lazy< IfcElement > RelatedBuildingElement;
+    };
+
     // C++ wrapper for IfcElectricMotorType
     struct IfcElectricMotorType : IfcEnergyConversionDeviceType, ObjectHelper<IfcElectricMotorType,1> { IfcElectricMotorType() : Object("IfcElectricMotorType") {}
 		IfcElectricMotorTypeEnum::Out PredefinedType;
@@ -3922,6 +3946,7 @@ namespace STEP {
 	DECL_CONV_STUB(IfcStructuralPointAction);
 	DECL_CONV_STUB(IfcSpatialStructureElement);
 	DECL_CONV_STUB(IfcSpace);
+	DECL_CONV_STUB(IfcContextDependentUnit);
 	DECL_CONV_STUB(IfcCoolingTowerType);
 	DECL_CONV_STUB(IfcFacetedBrepWithVoids);
 	DECL_CONV_STUB(IfcValveType);
@@ -3981,6 +4006,7 @@ namespace STEP {
 	DECL_CONV_STUB(IfcDistributionControlElement);
 	DECL_CONV_STUB(IfcTransformerType);
 	DECL_CONV_STUB(IfcLaborResource);
+	DECL_CONV_STUB(IfcDerivedProfileDef);
 	DECL_CONV_STUB(IfcFurnitureStandard);
 	DECL_CONV_STUB(IfcStairFlightType);
 	DECL_CONV_STUB(IfcWorkControl);
@@ -4054,6 +4080,7 @@ namespace STEP {
 	DECL_CONV_STUB(IfcOpenShell);
 	DECL_CONV_STUB(IfcSubContractResource);
 	DECL_CONV_STUB(IfcSweptDiskSolid);
+	DECL_CONV_STUB(IfcCompositeProfileDef);
 	DECL_CONV_STUB(IfcTankType);
 	DECL_CONV_STUB(IfcSphere);
 	DECL_CONV_STUB(IfcPolyLoop);
@@ -4086,6 +4113,7 @@ namespace STEP {
 	DECL_CONV_STUB(IfcLightSourcePositional);
 	DECL_CONV_STUB(IfcProjectionCurve);
 	DECL_CONV_STUB(IfcFillAreaStyleTiles);
+	DECL_CONV_STUB(IfcRelFillsElement);
 	DECL_CONV_STUB(IfcElectricMotorType);
 	DECL_CONV_STUB(IfcTendon);
 	DECL_CONV_STUB(IfcDistributionChamberElementType);

code/IFCUtil.cpp

@@ -295,6 +295,13 @@ void ConvertCartesianPoint(aiVector3D& out, const IfcCartesianPoint& in)
 	}
 }
 
+// ------------------------------------------------------------------------------------------------
+void ConvertVector(aiVector3D& out, const IfcVector& in)
+{
+	ConvertDirection(out,in.Orientation);
+	out *= in.Magnitude;
+}
+
 // ------------------------------------------------------------------------------------------------
 void ConvertDirection(aiVector3D& out, const IfcDirection& in)
 {
@@ -304,7 +311,7 @@ void ConvertDirection(aiVector3D& out, const IfcDirection& in)
 	}
 	const float len = out.Length();
 	if (len<1e-6) {
-		IFCImporter::LogWarn("direction vector too small, normalizing would result in a division by zero");
+		IFCImporter::LogWarn("direction vector magnitude too small, normalization would result in a division by zero");
 		return;
 	}
 	out /= len;

code/IFCUtil.h

@@ -130,6 +130,8 @@ struct ConversionData
 	std::vector<TempOpening>* collect_openings;
 };
 
+// ------------------------------------------------------------------------------------------------
+// Binary predicate to compare vectors with a given, quadratic epsilon.
 // ------------------------------------------------------------------------------------------------
 struct FuzzyVectorCompare {
 
@@ -164,16 +166,17 @@ struct TempMesh
 
 
 // conversion routines for common IFC entities, implemented in IFCUtil.cpp
-void ConvertColor(aiColor4D& out, const IFC::IfcColourRgb& in);
-void ConvertColor(aiColor4D& out, const IFC::IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base);
-void ConvertCartesianPoint(aiVector3D& out, const IFC::IfcCartesianPoint& in);
-void ConvertDirection(aiVector3D& out, const IFC::IfcDirection& in);
+void ConvertColor(aiColor4D& out, const IfcColourRgb& in);
+void ConvertColor(aiColor4D& out, const IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base);
+void ConvertCartesianPoint(aiVector3D& out, const IfcCartesianPoint& in);
+void ConvertDirection(aiVector3D& out, const IfcDirection& in);
+void ConvertVector(aiVector3D& out, const IfcVector& in);
 void AssignMatrixAxes(aiMatrix4x4& out, const aiVector3D& x, const aiVector3D& y, const aiVector3D& z);
-void ConvertAxisPlacement(aiMatrix4x4& out, const IFC::IfcAxis2Placement3D& in);
-void ConvertAxisPlacement(aiMatrix4x4& out, const IFC::IfcAxis2Placement2D& in);
+void ConvertAxisPlacement(aiMatrix4x4& out, const IfcAxis2Placement3D& in);
+void ConvertAxisPlacement(aiMatrix4x4& out, const IfcAxis2Placement2D& in);
 void ConvertAxisPlacement(aiVector3D& axis, aiVector3D& pos, const IFC::IfcAxis1Placement& in);
-void ConvertAxisPlacement(aiMatrix4x4& out, const IFC::IfcAxis2Placement& in, ConversionData& conv);
-void ConvertTransformOperator(aiMatrix4x4& out, const IFC::IfcCartesianTransformationOperator& op);
+void ConvertAxisPlacement(aiMatrix4x4& out, const IfcAxis2Placement& in, ConversionData& conv);
+void ConvertTransformOperator(aiMatrix4x4& out, const IfcCartesianTransformationOperator& op);
 bool IsTrue(const EXPRESS::BOOLEAN& in);
 float ConvertSIPrefix(const std::string& prefix);
 
@@ -188,6 +191,72 @@ unsigned int ProcessMaterials(const IFC::IfcRepresentationItem& item, Conversion
 bool ProcessRepresentationItem(const IfcRepresentationItem& item, std::vector<unsigned int>& mesh_indices, ConversionData& conv);
 void AssignAddedMeshes(std::vector<unsigned int>& mesh_indices,aiNode* nd,ConversionData& /*conv*/);
 
+
+// IFCCurve.cpp
+
+// ------------------------------------------------------------------------------------------------
+// Temporary representation for an arbitrary sub-class of IfcCurve. Used to sample the curves
+// to obtain a list of line segments.
+// ------------------------------------------------------------------------------------------------
+class Curve
+{
+protected:
+
+	Curve(const IfcCurve& base_entity, ConversionData& conv)
+		: base_entity(base_entity)
+		, conv(conv)
+	{}
+
+public:
+
+	// evaluate the curve at the given parametric position
+	virtual aiVector3D Eval(float p) const = 0;
+
+	// get the range of the curve (both inclusive).
+	// +inf and -inf are valid return values, the curve is not bounded in such a case.
+	virtual std::pair<float,float> GetParametricRange() const = 0;
+
+public:
+
+	static Curve* Convert(const IFC::IfcCurve&,ConversionData& conv);
+
+protected:
+
+	const IfcCurve& base_entity;
+	ConversionData& conv;
+};
+
+
+// --------------------------------------------------------------------------------
+// A BoundedCurve always holds the invariant that GetParametricRange()
+// never returns infinite values.
+// --------------------------------------------------------------------------------
+class BoundedCurve : public Curve 
+{
+public:
+
+	BoundedCurve(const IfcBoundedCurve& entity, ConversionData& conv)
+		: Curve(entity,conv)
+	{}
+
+public:
+
+	// given a point on the curve, suggest a suitable next point for
+	// discrete sampling. The returned parameter value should be
+	// based on two considerations:
+	//  a) curve geometry is to be preserved
+	//  b) detail level should be chosen based on importer settings
+	//     and (possibly) importance and dimension of the spatial 
+	//     structure.
+	// return +inf if the suggestion is to stop sampling.
+	virtual float SuggestNext(float u) const;
+
+	// intelligently sample the curve based on Eval() and SuggestNext()
+	void SampleDiscrete(TempMesh& out) const;
+};
+
+
+
 }
 }
 

workspaces/vc9/assimp.vcproj

@@ -714,6 +714,7 @@
 		</Configuration>
 		<Configuration
 			Name="debug-noboost-st|Win32"
+			IntermediateDirectory="H:/obj/$(ProjectName)_$(ConfigurationName)_$(PlatformName)"
 			ConfigurationType="4"
 			InheritedPropertySheets=".\shared\LibShared.vsprops;.\shared\NoBoostShared.vsprops;.\shared\FastSTL.vsprops"
 			>