void SurfaceTool::create_from(const Ref<Mesh> &p_existing, int p_surface) {
clear();
primitive = p_existing->surface_get_primitive_type(p_surface);
_create_list(p_existing, p_surface, &vertex_array, &index_array, format);
material = p_existing->surface_get_material(p_surface);
}
void SurfaceTool::append_from(const Ref<Mesh>& p_existing, int p_surface,const Transform& p_xform) {
if (vertex_array.size()==0) {
primitive=p_existing->surface_get_primitive_type(p_surface);
format=0;
}
int nformat;
List<Vertex> nvertices;
List<int> nindices;
_create_list(p_existing,p_surface,&nvertices,&nindices,nformat);
format|=nformat;
int vfrom = vertex_array.size();
for(List<Vertex>::Element *E=nvertices.front();E;E=E->next()) {
Vertex v=E->get();
v.vertex=p_xform.xform(v.vertex);
if (nformat&VS::ARRAY_FORMAT_NORMAL) {
v.normal=p_xform.basis.xform(v.normal);
}
if (nformat&VS::ARRAY_FORMAT_TANGENT) {
v.tangent=p_xform.basis.xform(v.tangent);
v.binormal=p_xform.basis.xform(v.binormal);
}
vertex_array.push_back(v);
}
for(List<int>::Element *E=nindices.front();E;E=E->next()) {
int dst_index = E->get()+vfrom;
//if (dst_index <0 || dst_index>=vertex_array.size()) {
// print_line("invalid index!");
//}
index_array.push_back(dst_index);
}
if (index_array.size()%3)
print_line("IA not div of 3?");
}
