Setting Per-vertex Color

[_dk_]

Hello guys,

I'm trying to create a node which changes vertex colors of input mesh. But I probably miss some omportant point. First of all the node has mesh as an input and mesh as output. After I create my output mesh:

CODE
...
meshFS.create(vertexCount, polyCount, vertices, faceCounts, faces,
                           newOutputData,
                           //MObject::kNullObj
                      );
...
mehsFS.setVertexColors(colors, colorIndices);
...

All calls return success, I'm checking all of them in real code.

But the shading of the shape still stays the same (weel, if I'm using MObject::kNullObj as owner, it shades my vertices). If I go to Polygons->Edit Polygons->Colors->Paint Vertex Color Tool. It starts being shaded (I can see my colors instead of flat grey). So I guess there's some sort of property or set created, which I'm missing (i.e. nothing changes in HyperGraph nor Outliner). Could you please point what's wrong or give a hint where to look (I examined examples but failed to find anything similiar to start with).

Thank you

[joojaa]

just because you assign vertex colors does not maen maya shows you the effect. the display must fiirst be told to display vertex colors and then it should refresh also.

Thisng is maya has a nuber of vertex color sets it could show. Default is to show none.

[_dk_]

Thank you for response.

Can you tell me whether it can be done from MEL (I've tried to search but didn't find anything related)? displayPref doesn't have those options.
In fact I didn't even manage to find it in UI (maya 7.0) under display, window, shading etc.

After some examination of Maya's default scripts I've found polyColorPerVertex, which almost does the job (or just calling PaintVertexColorTool). But you seem to have been talking of something else, could you please provide more details.

Thank you!

[mfiorilli]

Hi there,

Have you guys found a solution for setting / displaying the colorPerVertex correctly?

I'm actually using this code but with no success:

---

    MColorArray tensionColor;
    MIntArray vertexCount;
    MIntArray vertexList;

    colorMesh.getVertices( vertexCount, vertexList );
    colorMesh.getColors(tensionColor);

    for(int i=0; i<nPoints; i++) {
        MColor couleur;
        couleur.r=1; couleur.g=0; couleur.b=1; couleur.a=1;
        tensionColor.insert(couleur,i);
    }

    MDGModifier dgModifier;
    status = colorMesh.setVertexColors(tensionColor, vertexList, &dgModifier);

---

Thank you!