Per-face colors in plot_trisurf

The docs for pylab.plot_trisurf state that triangles is of shape (N,3) and that color should also be of shape (N, 3), implying that the colors will apply to the triangle faces, not the vertices.

However, the observed behavior (on version 0.4.0a2 from PyPI) is to color the vertices.

colors = np.ones((4,3))*.3
colors[0, 2] = 1.0
colors[3, 2] = 1.0
plot_trisurf([0, 0, 3., 3.], [0, 4., 0, 4.], [1, 0., 0, 1.], 
                triangles=[[0, 2, 3], [0, 3, 1]], color=colors)

If the above behavior is as intended? If so, is there another way to set the triangle face color directly?

[maartenbreddels]

Thanks, I’ll keep this open and dive into it later, maybe it is possible more efficiently.

[maartenbreddels]

I think this can be done at the kernel side first, I guess face_colors and triangle_colors arguments to plot_* would need to sort out the duplication of vertices manually.