3d-viewer, fix again a transparency issue.

3d-viewer/3d_draw.cpp

@@ -587,6 +587,7 @@ void EDA_3D_CANVAS::Redraw()
     if(  isEnabled( FL_MODULE ) && m_glLists[GL_ID_3DSHAPES_TRANSP_FRONT] )
     {
         glEnable( GL_COLOR_MATERIAL );
+        SetOpenGlDefaultMaterial();
         glEnable( GL_BLEND );
         glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
         glCallList( m_glLists[GL_ID_3DSHAPES_TRANSP_FRONT] );

3d-viewer/3d_mesh_model.cpp

@@ -188,6 +188,7 @@ void S3D_MESH::openGL_Render( bool aIsRenderingJustNonTransparentObjects,
     printf("m_MaterialIndexPerVertex.size() %lu\n", m_MaterialIndexPerVertex.size() );
     printf("m_PerVertexNormalsNormalized.size() %lu\n", m_PerVertexNormalsNormalized.size() );
     printf("m_PerFaceVertexNormals.size() %lu\n", m_PerFaceVertexNormals.size() );
+    printf("m_PerFaceNormalsNormalized.size() %lu\n", m_PerFaceNormalsNormalized.size() );
 
     printf("smoothShapes %d\n", smoothShapes );
 
@@ -208,8 +209,6 @@ void S3D_MESH::openGL_Render( bool aIsRenderingJustNonTransparentObjects,
     float lastTransparency_value = 0.0f;
 
     if( m_Materials )
-    {
-        if ( m_Materials->m_ColorPerVertex == false )
     {
         bool isTransparent = m_Materials->SetOpenGLMaterial( 0, useMaterial );
 
@@ -229,7 +228,6 @@ void S3D_MESH::openGL_Render( bool aIsRenderingJustNonTransparentObjects,
                     return;
             }
     }
-    }
 
     glPushMatrix();
     glTranslatef( m_translation.x, m_translation.y, m_translation.z );