support hard-skinning

pandatool/src/eggcharbase/eggJointNodePointer.cxx

@@ -208,7 +208,7 @@ expose(EggGroup::DCSType dcs_type) {
 bool EggJointNodePointer::
 has_vertices() const {
   if (_joint != (EggGroup *)NULL) {
-    return (_joint->vref_size() != 0);
+    return (_joint->vref_size() != 0) || _joint->has_primitives();
   }
 
   return false;

pandatool/src/maya/maya_funcs.cxx

@@ -65,6 +65,21 @@ get_maya_plug(MObject &node, const string &attribute_name, MPlug &plug) {
   return true;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: is_connected
+//  Description: Returns true if the named connection exists on the
+//               node and is connected to anything, false otherwise.
+////////////////////////////////////////////////////////////////////
+bool
+is_connected(MObject &node, const string &attribute_name) {
+  MPlug plug;
+  if (!get_maya_plug(node, attribute_name, plug)) {
+    return false;
+  }
+
+  return plug.isConnected();
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: has_attribute
 //  Description: Returns true if the node has the indicated attribute,
@@ -559,10 +574,17 @@ list_maya_attributes(MObject &node) {
       << name << " has " << connections.length() << " connections.\n";
     for (i = 0; i < connections.length(); i++) {
       MPlug plug = connections[i];
+
       maya_cat.info(false)
         << "  " << i << ". " << plug.name().asChar() << ", "
         << plug.attribute().apiTypeStr() << ", " 
-        << plug.node().apiTypeStr() << "\n";
+        << plug.node().apiTypeStr();
+      if (plug.isConnected()) {
+        maya_cat.info(false)
+          << " (*)";
+      }
+      maya_cat.info(false)
+        << "\n";
     }
   }
     

pandatool/src/maya/maya_funcs.h

@@ -38,6 +38,9 @@ class MObject;
 bool
 get_maya_plug(MObject &node, const string &attribute_name, MPlug &plug);
 
+bool
+is_connected(MObject &node, const string &attribute_name);
+
 template<class ValueType>
 bool
 get_maya_attribute(MObject &node, const string &attribute_name,

pandatool/src/mayaegg/mayaNodeDesc.cxx

@@ -17,9 +17,24 @@
 ////////////////////////////////////////////////////////////////////
 
 #include "mayaNodeDesc.h"
+#include "maya_funcs.h"
 
 TypeHandle MayaNodeDesc::_type_handle;
 
+// This is a list of the names of Maya connections that count as a
+// transform.
+static const char *transform_connections[] = {
+  "translate",
+  "translateX",
+  "translateY",
+  "translateZ",
+  "rotate",
+  "rotateX",
+  "rotateY",
+  "rotateZ",
+};
+static const int num_transform_connections = sizeof(transform_connections) / sizeof(const char *);
+
 ////////////////////////////////////////////////////////////////////
 //     Function: MayaNodeDesc::Constructor
 //       Access: Public
@@ -72,6 +87,31 @@ from_dag_path(const MDagPath &dag_path) {
       if (_parent != (MayaNodeDesc *)NULL) {
         _parent->mark_joint_parent();
       }
+
+    } else {
+      // The node is not a joint, but maybe its transform is
+      // controlled by connected inputs.  If so, we should treat it
+      // like a joint.
+      bool transform_connected = false;
+
+      MStatus status;
+      MObject node = dag_path.node(&status);
+      if (status) {
+        for (int i = 0; 
+             i < num_transform_connections && !transform_connected;
+             i++) {
+          if (is_connected(node, transform_connections[i])) {
+            transform_connected = true;
+          }
+        }
+      }
+      
+      if (transform_connected) {
+        _joint_type = JT_joint;
+        if (_parent != (MayaNodeDesc *)NULL) {
+          _parent->mark_joint_parent();
+        }
+      }
     }
   }
 }

pandatool/src/mayaegg/mayaToEggConverter.cxx

@@ -662,15 +662,7 @@ process_model_node(MayaNodeDesc *node_desc) {
     mayaegg_cat.debug(false) << "\n";
   }
 
-  if (node_desc->is_joint()) {
-    // Don't bother with joints unless we're getting an animatable
-    // model.
-    if (_animation_convert == AC_model) { 
-      EggGroup *egg_group = _tree.get_egg_group(node_desc);
-      get_joint_transform(dag_path, egg_group);
-    }
-
-  } else if (dag_node.inUnderWorld()) {
+  if (dag_node.inUnderWorld()) {
     if (mayaegg_cat.is_debug()) {
       mayaegg_cat.debug()
         << "Ignoring underworld node " << path
@@ -700,7 +692,7 @@ process_model_node(MayaNodeDesc *node_desc) {
 
   } else if (dag_path.hasFn(MFn::kNurbsSurface)) {
     EggGroup *egg_group = _tree.get_egg_group(node_desc);
-    get_transform(dag_path, egg_group);
+    get_transform(node_desc, dag_path, egg_group);
     
     MFnNurbsSurface surface(dag_path, &status);
     if (!status) {
@@ -718,7 +710,7 @@ process_model_node(MayaNodeDesc *node_desc) {
     // things in them.
     if (_animation_convert != AC_model) {
       EggGroup *egg_group = _tree.get_egg_group(node_desc);
-      get_transform(dag_path, egg_group);
+      get_transform(node_desc, dag_path, egg_group);
       
       MFnNurbsCurve curve(dag_path, &status);
       if (!status) {
@@ -732,7 +724,7 @@ process_model_node(MayaNodeDesc *node_desc) {
       
   } else if (dag_path.hasFn(MFn::kMesh)) {
     EggGroup *egg_group = _tree.get_egg_group(node_desc);
-    get_transform(dag_path, egg_group);
+    get_transform(node_desc, dag_path, egg_group);
 
     MFnMesh mesh(dag_path, &status);
     if (!status) {
@@ -761,13 +753,13 @@ process_model_node(MayaNodeDesc *node_desc) {
       // locators within character models may not be meaningful.
       egg_group->set_dcs_type(EggGroup::DC_net);
     }
-    get_transform(dag_path, egg_group);
+    get_transform(node_desc, dag_path, egg_group);
     make_locator(dag_path, dag_node, egg_group);
 
   } else {
     // Just a generic node.
     EggGroup *egg_group = _tree.get_egg_group(node_desc);
-    get_transform(dag_path, egg_group);
+    get_transform(node_desc, dag_path, egg_group);
   }
 
   return true;
@@ -780,10 +772,15 @@ process_model_node(MayaNodeDesc *node_desc) {
 //               and applies it to the corresponding Egg node.
 ////////////////////////////////////////////////////////////////////
 void MayaToEggConverter::
-get_transform(const MDagPath &dag_path, EggGroup *egg_group) {
+get_transform(MayaNodeDesc *node_desc, const MDagPath &dag_path, 
+              EggGroup *egg_group) {
   if (_animation_convert == AC_model) {
     // When we're getting an animated model, we only get transforms
-    // for joints.
+    // for joints, and they get converted in a special way.
+
+    if (node_desc->is_joint()) { 
+      get_joint_transform(dag_path, egg_group);
+    }
     return;
   }
 
@@ -1768,9 +1765,8 @@ get_vertex_weights(const MDagPath &dag_path, const MFnMesh &mesh,
 
     it.next();
   }
-  
-  mayaegg_cat.error()
-    << "Unable to find a cluster handle for the DG node.\n"; 
+
+  // The mesh was not soft-skinned.
   return false;
 }
 

pandatool/src/mayaegg/mayaToEggConverter.h

@@ -97,7 +97,8 @@ private:
   bool convert_hierarchy(EggGroupNode *egg_root);
   bool process_model_node(MayaNodeDesc *node_desc);
 
-  void get_transform(const MDagPath &dag_path, EggGroup *egg_group);
+  void get_transform(MayaNodeDesc *node_desc, const MDagPath &dag_path,
+                     EggGroup *egg_group);
   void get_joint_transform(const MDagPath &dag_path, EggGroup *egg_group);
 
   // I ran into core dumps trying to pass around a MFnMesh object by