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GPURenderBundleEncoder: draw() method - Web APIs | MDN

Syntax

js

draw(vertexCount)
draw(vertexCount, instanceCount)
draw(vertexCount, instanceCount, firstVertex)
draw(vertexCount, instanceCount, firstVertex, firstInstance)

Parameters

vertexCount

A number defining the number of vertices to draw.

instanceCount Optional

A number defining the number of instances to draw. If omitted, instanceCount defaults to 1.

firstVertex Optional

A number defining the offset into the vertex buffers, in vertices, to begin drawing from. If omitted, firstVertex defaults to 0.

firstInstance Optional

A number defining the first instance to draw. If omitted, firstInstance defaults to 0.

Return value

None (Undefined).

Examples

js

function recordRenderPass(passEncoder) {
  if (settings.dynamicOffsets) {
    passEncoder.setPipeline(dynamicPipeline);
  } else {
    passEncoder.setPipeline(pipeline);
  }
  passEncoder.setVertexBuffer(0, vertexBuffer);
  passEncoder.setBindGroup(0, timeBindGroup);
  const dynamicOffsets = [0];
  for (let i = 0; i < numTriangles; ++i) {
    if (settings.dynamicOffsets) {
      dynamicOffsets[0] = i * alignedUniformBytes;
      passEncoder.setBindGroup(1, dynamicBindGroup, dynamicOffsets);
    } else {
      passEncoder.setBindGroup(1, bindGroups[i]);
    }
    passEncoder.draw(3, 1, 0, 0);
  }
}

The above snippet is taken from the WebGPU Samples Animometer example.

Specifications

Specification
WebGPU
# dom-gpurendercommandsmixin-draw

Browser compatibility

See also

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