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The setBlendConstant() method of the GPURenderPassEncoder interface sets the constant blend color and alpha values used with "constant" and "one-minus-constant" blend factors (as set in the descriptor of the GPUDevice.createRenderPipeline() method, in the blend property).
color
An object or array representing the color to use when blending â the r, g, b, and a components are represented as floating point numbers between 0.0 and 1.0.
What follows is an object example:
const color = { r: 0.0, g: 0.5, b: 1.0, a: 1.0 };
The array equivalent would look like this:
const color = [0.0, 0.5, 1.0, 1.0];
Note: If a setBlendConstant() call is not made, the blend constant color value defaults to (0, 0, 0, 0) for each render pass.
None (Undefined).
// â¦
const passEncoder = commandEncoder.beginRenderPass(renderPassDescriptor);
passEncoder.setPipeline(renderPipeline);
passEncoder.setVertexBuffer(0, vertexBuffer);
passEncoder.setBlendConstant([1.0, 0.0, 0.0, 1.0]);
passEncoder.draw(3);
passEncoder.end();
// â¦
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