Setting vertex colours

[duncan_rowland]

Hello,
   just trying to understand how to set vertex colours. When I run the code below (Box001 is an editable mesh), I still need to add and then remove a vertex paint modifier to get the colours copied to the base object. Is there a better way to directly access the base object's vertices?

   Many thanks in advance, -Duncan.

INode* node = GetCOREInterface()->GetINodeByName(_T("Box001"));
const ObjectState* os = &node->EvalWorldState(MAXScript_time());
Object* obj = os->obj;
TriObject* as_tri = dynamic_cast<TriObject*>(obj);
Mesh* mesh = &as_tri->GetMesh();


for (int i = 0; i < mesh->getNumVertCol(); i++) {
   mesh->vertCol[i].x = 1.f;
   mesh->vertCol[i].y = 0.f;
   mesh->vertCol[i].z = 0.f;
}

[2829024262]

Can you check the C++ SDK to see if the "bool SetVertColor (UVVert clr, int mapChannel, DWORD flag=MN_SEL)" function is the one you need? It is under the MNMesh class.

[denisT.MaxDoctor]

You are correctly assigning vertex colors. However, if the Vertex Paint modifier is present in the stack, it will overwrite your mesh colors. Make sure to update the mesh to invalidate the mesh data.