Method generate

radiantcore/patch/PatchTesselation.cpp:838–892

}

void PatchTesselation::generate(std::size_t patchWidth, std::size_t patchHeight,
	const PatchControlArray& controlPoints, bool subdivionsFixed, const Subdivisions& subdivs,
    IRenderEntity* renderEntity)
{
	width = patchWidth;
	height = patchHeight;

	_maxWidth = width;
	_maxHeight = height;

	// We start off with the control vertex grid, copy it into our tesselation structure
	vertices.resize(controlPoints.size());

	for (std::size_t w = 0; w < width; w++)
	{
		for (std::size_t h = 0; h < height; h++)
		{
			vertices[h*width + w].vertex = controlPoints[h*width + w].vertex;
			vertices[h*width + w].texcoord = controlPoints[h*width + w].texcoord;
		}
	}

	// generate normals for the control mesh
	generateNormals();

	if (subdivionsFixed)
	{
		subdivideMeshFixed(subdivs.x(), subdivs.y());
	}
	else
	{
		subdivideMesh();
	}

    // Final update: assign colours and normalise normals
    auto colour = renderEntity ? renderEntity->getEntityColour() : Vector4(1, 1, 1, 1);

	for (MeshVertex& vertex : vertices)
	{
	    // normalize all the lerped normals
		if (vertex.normal.getLengthSquared() > 0)
		{
			vertex.normal.normalise();
		}

        // Assign vertex colours using the colour of the entity
        vertex.colour = colour;
	}

	// Build the strip indices for rendering the quads
	generateIndices();

	// With indices in place we can derive the tangent/bitangent vectors
	deriveTangents();
}