fix edges_colored drawmode for for meshes

ACG/GL/DrawMeshT.cc

@@ -2430,11 +2430,11 @@ void ACG::DrawMeshT<Mesh>::updateEdgeHalfedgeVertexDeclarations()
 {
   vertexDeclEdgeCol_->clear();
   vertexDeclEdgeCol_->addElement(GL_FLOAT, 3, VERTEX_USAGE_POSITION, perEdgeVertexBuffer());
-  vertexDeclEdgeCol_->addElement(GL_UNSIGNED_BYTE, 4, VERTEX_USAGE_COLOR, perEdgeColorBuffer());
+  vertexDeclEdgeCol_->addElement(GL_FLOAT, 4, VERTEX_USAGE_COLOR, perEdgeColorBuffer());
 
   vertexDeclHalfedgeCol_->clear();
   vertexDeclHalfedgeCol_->addElement(GL_FLOAT, 3, VERTEX_USAGE_POSITION, perHalfedgeVertexBuffer());
-  vertexDeclHalfedgeCol_->addElement(GL_UNSIGNED_BYTE, 4, VERTEX_USAGE_COLOR, perHalfedgeColorBuffer());
+  vertexDeclHalfedgeCol_->addElement(GL_FLOAT, 4, VERTEX_USAGE_COLOR, perHalfedgeColorBuffer());
   
   vertexDeclHalfedgePos_->clear();
   vertexDeclHalfedgePos_->addElement(GL_FLOAT, 3, VERTEX_USAGE_POSITION, perHalfedgeVertexBuffer());

ACG/Scenegraph/MeshNode2T.cc

@@ -834,6 +834,7 @@ void ACG::SceneGraph::MeshNodeT<Mesh>::getRenderObjects( IRenderer* _renderer, G
       ro.shaderDesc.vertexColors = true;
 
       // note: colored edges are in sysmem, so they are directly bound to the VertexDeclaration
+      drawMesh_->updateEdgeHalfedgeVertexDeclarations();
       ro.vertexDecl = drawMesh_->getEdgeColoredVertexDeclaration();
       ro.glDrawArrays(GL_LINES, 0, int(mesh_.n_edges() * 2));
 
@@ -855,6 +856,7 @@ void ACG::SceneGraph::MeshNodeT<Mesh>::getRenderObjects( IRenderer* _renderer, G
       ro.shaderDesc.shadeMode = SG_SHADE_UNLIT;
 
       // buffers in system memory
+      drawMesh_->updateEdgeHalfedgeVertexDeclarations();
       if (props->colored())
         ro.vertexDecl = drawMesh_->getHalfedgeVertexDeclaration();
       else