assimp.assimp/code/FBXDocumentUtil.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
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*/

/** @file  FBXDocumentUtil.cpp
 *  @brief Implementation of the FBX DOM utility functions declared in FBXDocumentUtil.h
 */
#include "AssimpPCH.h"

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include <functional>

#include "FBXParser.h"
#include "FBXDocument.h"
#include "FBXUtil.h"
#include "FBXDocumentUtil.h"
#include "FBXProperties.h"

namespace Assimp {
namespace FBX {
namespace Util {

// ------------------------------------------------------------------------------------------------
// signal DOM construction error, this is always unrecoverable. Throws DeadlyImportError.
void DOMError(const std::string& message, const Token& token)
{
	throw DeadlyImportError(Util::AddTokenText("FBX-DOM",message,&token));
}

// ------------------------------------------------------------------------------------------------
void DOMError(const std::string& message, const Element* element /*= NULL*/)
{
	if(element) {
		DOMError(message,element->KeyToken());
	}
	throw DeadlyImportError("FBX-DOM " + message);
}


// ------------------------------------------------------------------------------------------------
// print warning, do return
void DOMWarning(const std::string& message, const Token& token)
{
	if(DefaultLogger::get()) {
		DefaultLogger::get()->warn(Util::AddTokenText("FBX-DOM",message,&token));
	}
}

// ------------------------------------------------------------------------------------------------
void DOMWarning(const std::string& message, const Element* element /*= NULL*/)
{
	if(element) {
		DOMWarning(message,element->KeyToken());
		return;
	}
	if(DefaultLogger::get()) {
		DefaultLogger::get()->warn("FBX-DOM: " + message);
	}
}


// ------------------------------------------------------------------------------------------------
// extract required compound scope
const Scope& GetRequiredScope(const Element& el)
{
	const Scope* const s = el.Compound();
	if(!s) {
		DOMError("expected compound scope",&el);
	}

	return *s;
}


// ------------------------------------------------------------------------------------------------
// get token at a particular index
const Token& GetRequiredToken(const Element& el, unsigned int index)
{
	const TokenList& t = el.Tokens();
	if(index >= t.size()) {
		DOMError(Formatter::format( "missing token at index " ) << index,&el);
	}

	return *t[index];
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsID() with DOMError handling
uint64_t ParseTokenAsID(const Token& t) 
{
	const char* err;
	const uint64_t i = ParseTokenAsID(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsDim() with DOMError handling
size_t ParseTokenAsDim(const Token& t)
{
	const char* err;
	const size_t i = ParseTokenAsDim(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsFloat() with DOMError handling
float ParseTokenAsFloat(const Token& t)
{
	const char* err;
	const float i = ParseTokenAsFloat(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsInt() with DOMError handling
int ParseTokenAsInt(const Token& t)
{
	const char* err;
	const int i = ParseTokenAsInt(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsString() with DOMError handling
std::string ParseTokenAsString(const Token& t)
{
	const char* err;
	const std::string& i = ParseTokenAsString(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}

// ------------------------------------------------------------------------------------------------
// extract a required element from a scope, abort if the element cannot be found
const Element& GetRequiredElement(const Scope& sc, const std::string& index, const Element* element /*= NULL*/) 
{
	const Element* el = sc[index];
	if(!el) {
		DOMError("did not find required element \"" + index + "\"",element);
	}
	return *el;
}

// XXX: tacke code duplication in the various ReadVectorDataArray() overloads below.
// could use a type traits based solution.

// ------------------------------------------------------------------------------------------------
// read an array of float3 tuples
void ReadVectorDataArray(std::vector<aiVector3D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// may throw bad_alloc if the input is rubbish, but this need
	// not to be prevented - importing would fail but we wouldn't
	// crash since assimp handles this case properly.
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 3 != 0) {
		DOMError("number of floats is not a multiple of three (3)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiVector3D v;
		v.x = ParseTokenAsFloat(**it++);
		v.y = ParseTokenAsFloat(**it++);
		v.z = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of color4 tuples
void ReadVectorDataArray(std::vector<aiColor4D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	//  see notes in ReadVectorDataArray() above
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 4 != 0) {
		DOMError("number of floats is not a multiple of four (4)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiColor4D v;
		v.r = ParseTokenAsFloat(**it++);
		v.g = ParseTokenAsFloat(**it++);
		v.b = ParseTokenAsFloat(**it++);
		v.a = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of float2 tuples
void ReadVectorDataArray(std::vector<aiVector2D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray() above
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 2 != 0) {
		DOMError("number of floats is not a multiple of two (2)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiVector2D v;
		v.x = ParseTokenAsFloat(**it++);
		v.y = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of ints
void ReadVectorDataArray(std::vector<int>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const int ival = ParseTokenAsInt(**it++);
		out.push_back(ival);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of floats
void ReadVectorDataArray(std::vector<float>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const float ival = ParseTokenAsFloat(**it++);
		out.push_back(ival);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of uints
void ReadVectorDataArray(std::vector<unsigned int>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const int ival = ParseTokenAsInt(**it++);
		if(ival < 0) {
			DOMError("encountered negative integer index");
		}
		out.push_back(static_cast<unsigned int>(ival));
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of uint64_ts
void ReadVectorDataArray(std::vector<uint64_t>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const uint64_t ival = ParseTokenAsID(**it++);
		
		out.push_back(ival);
	}
}


// ------------------------------------------------------------------------------------------------
aiMatrix4x4 ReadMatrix(const Element& element)
{
	std::vector<float> values;
	ReadVectorDataArray(values,element);

	if(values.size() != 16) {
		DOMError("expected 16 matrix elements");
	}

	aiMatrix4x4 result;


	result.a1 = values[0];
	result.a2 = values[1];
	result.a3 = values[2];
	result.a4 = values[3];

	result.b1 = values[4];
	result.b2 = values[5];
	result.b3 = values[6];
	result.b4 = values[7];

	result.c1 = values[8];
	result.c2 = values[9];
	result.c3 = values[10];
	result.c4 = values[11];

	result.d1 = values[12];
	result.d2 = values[13];
	result.d3 = values[14];
	result.d4 = values[15];

	result.Transpose();
	return result;
}


// ------------------------------------------------------------------------------------------------
// fetch a property table and the corresponding property template 
boost::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc, 
	const std::string& templateName, 
	const Element &element, 
	const Scope& sc)
{
	const Element* const Properties70 = sc["Properties70"];
	boost::shared_ptr<const PropertyTable> templateProps = boost::shared_ptr<const PropertyTable>(
		static_cast<const PropertyTable*>(NULL));

	if(templateName.length()) {
		PropertyTemplateMap::const_iterator it = doc.Templates().find(templateName); 
		if(it != doc.Templates().end()) {
			templateProps = (*it).second;
		}
	}

	if(!Properties70) {
		DOMWarning("material property table (Properties70) not found",&element);
		if(templateProps) {
			return templateProps;
		}
		else {
			return boost::make_shared<const PropertyTable>();
		}
	}
	return boost::make_shared<const PropertyTable>(*Properties70,templateProps);
}
} // !Util
} // !FBX
} // !Assimp

#endif