Question about material input

[ecw]

I am using SUMaterialInput to set a material.

            SUMaterialRef mat = SU_INVALID;
		SUMaterialCreate(&mat);
		SUMaterialSetTexture(mat, tex);
		SUMaterialSetName(mat, "material");

		SUMaterialInput mat_input;
		mat_input.material = mat;
		mat_input.num_uv_coords = 3;

I set the number of uv coords to three but when I try to loop through it looks for 4 coords.

            for(int k=0; k < 3; k++)
		{
			mat_input.vertex_indices[k] = k;
			mat_input.uv_coords[k] = uv_coords[k];
		}

I’m I doing something wrong?

[philippe_carret]

Have you seen :

Vertices and Indices with SketchUp C API

I’m unclear to which indices you are referring to. Which line of that code does that relate to? See the code below. With OpenGL the best performance for loading mesh data is when you have vertex/index data, I can see the vertices below but I am not sure what corresponds with indices for each vertex. Or does the SketchUp API not support indices for the Vertexes? Thank you. // Get all the faces from the entities object size_t faceCount = 0; SUEntitiesGetNumFaces(entities, &faceCount); …

And especially Bugra answer :

You can also look at the example I posted here. That shows mapping a texture on a face.
Do those help at all?

// Create material input for texture mapping and set it on the faces
SUMaterialInput mat_input;
mat_input.material = mat;
mat_input.num_uv_coords = 3;
SUPoint2D uv_coords[3] = { { 0, 0 }, { 1, 0 }, { 1, 1 } };
for (size_t i = 0; i < 3; ++i) {
  mat_input.vertex_indices[i] = i;
  mat_input.uv_coords[i] = uv_coords[i];
}

The result after sample compilation :

: