animate properly in dx

panda/src/dxgsg8/dxGeomMunger8.cxx

@@ -32,6 +32,7 @@ munge_format_impl(const qpGeomVertexFormat *orig) {
   // We have to build a completely new format that includes only the
   // appropriate components, in the appropriate order, in just one
   // array.
+  PT(qpGeomVertexFormat) new_format = new qpGeomVertexFormat(*orig);
   PT(qpGeomVertexArrayFormat) new_array_format = new qpGeomVertexArrayFormat;
 
   const qpGeomVertexDataType *vertex_type = 
@@ -47,6 +48,7 @@ munge_format_impl(const qpGeomVertexFormat *orig) {
     new_array_format->add_data_type
       (InternalName::get_vertex(), 3, qpGeomVertexDataType::NT_float32,
        qpGeomVertexDataType::C_point);
+    new_format->remove_data_type(vertex_type->get_name());
   } else {
     // If we don't have a vertex type, not much we can do.
     return orig;
@@ -56,12 +58,14 @@ munge_format_impl(const qpGeomVertexFormat *orig) {
     new_array_format->add_data_type
       (InternalName::get_normal(), 3, qpGeomVertexDataType::NT_float32,
        qpGeomVertexDataType::C_vector);
+    new_format->remove_data_type(normal_type->get_name());
   }
 
   if (color_type != (const qpGeomVertexDataType *)NULL) {
     new_array_format->add_data_type
       (InternalName::get_color(), 1, qpGeomVertexDataType::NT_packed_8888,
        qpGeomVertexDataType::C_argb);
+    new_format->remove_data_type(color_type->get_name());
   }
 
   // To support multitexture, we will need to add all of the relevant
@@ -71,9 +75,18 @@ munge_format_impl(const qpGeomVertexFormat *orig) {
     new_array_format->add_data_type
       (InternalName::get_texcoord(), texcoord_type->get_num_values(),
        qpGeomVertexDataType::NT_float32, qpGeomVertexDataType::C_texcoord);
+    new_format->remove_data_type(texcoord_type->get_name());
   }
 
-  PT(qpGeomVertexFormat) new_format = new qpGeomVertexFormat(new_array_format);
+  if (new_array_format->is_data_subset_of(*orig->get_array(0))) {
+    // If the new array format we have built is essentially the same
+    // as the first data array anyway, go ahead and keep the original.
+    return orig;
+  }
+
+  // Use the new format; make sure the DX8-friendly array is first in
+  // the list.
+  new_format->insert_array(0, new_array_format);
   return qpGeomVertexFormat::register_format(new_format);
 }
 

panda/src/gobj/qpgeomVertexData.cxx

@@ -843,6 +843,13 @@ update_animated_vertices(qpGeomVertexData::CDWriter &cdata, bool from_app) {
   qpGeomVertexReader from(this, InternalName::get_vertex());
   qpGeomVertexReader blendi(this, InternalName::get_transform_blend());
 
+  if (!blendi.has_data_type()) {
+    gobj_cat.warning()
+      << "Vertex data " << get_name()
+      << " has a transform_blend_palette, but no transform_blend data.\n";
+    return;
+  }
+
   if (from.get_data_type()->get_num_values() == 4) {
     for (int i = 0; i < num_vertices; i++) {
       LPoint4f vertex = from.get_data4f();

panda/src/gobj/qpgeomVertexFormat.cxx

@@ -162,6 +162,25 @@ add_array(qpGeomVertexArrayFormat *array_format) {
   return new_array;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: qpGeomVertexFormat::insert_array
+//       Access: Published
+//  Description: Adds the indicated array definition to the list of
+//               arrays at the indicated position.  This works just
+//               like add_array(), except that you can specify which
+//               array index the new array should have.
+//
+//               This may not be called once the format has been
+//               registered.
+////////////////////////////////////////////////////////////////////
+void qpGeomVertexFormat::
+insert_array(int array, qpGeomVertexArrayFormat *array_format) {
+  nassertv(!_is_registered);
+  nassertv(array >= 0 && array <= (int)_arrays.size());
+
+  _arrays.insert(_arrays.begin() + array, array_format);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: qpGeomVertexFormat::clear_arrays
 //       Access: Published

panda/src/gobj/qpgeomVertexFormat.h

@@ -72,6 +72,7 @@ PUBLISHED:
   void set_array(int array, qpGeomVertexArrayFormat *format);
   void remove_array(int array);
   int add_array(qpGeomVertexArrayFormat *array_format);
+  void insert_array(int array, qpGeomVertexArrayFormat *array_format);
   void clear_arrays();
 
   int get_num_data_types() const;