void apply_scene_scale(TargetObject obj, Vector3f scale)
{
// construct scaled scene frame and update SO
Frame3f f = obj.sceneFrame;
f.Origin = scale * (f.Origin - sharedOriginS) + sharedOriginS;
obj.curSceneFrame = f;
obj.SO.SetLocalFrame(f, CoordSpace.SceneCoords);
Frame3f fL = obj.SO.GetLocalFrame(CoordSpace.ObjectCoords);
// transform is to map from original obj frame into scene, scale, and then map into scaled obj frame
TransformSequence seq = new TransformSequence();
seq.AppendFromFrame(obj.objFrame);
seq.AppendScale(scale, sharedOriginS);
seq.AppendToFrame(fL);
obj.SO.EditAndUpdateMesh((mesh) => {
// restore original positions
mesh.VerticesBuffer.copy(obj.InputMeshV);
if (obj.InputMeshN != null && mesh.HasVertexNormals)
{
mesh.NormalsBuffer.copy(obj.InputMeshN);
}
// apply xform
MeshTransforms.PerVertexTransform(mesh, seq);
}, GeometryEditTypes.VertexDeformation);
}