@pixi/utils
Version:
Collection of utilities used by PixiJS
20 lines (18 loc) • 657 B
JavaScript
function createIndicesForQuads(size, outBuffer = null) {
const totalIndices = size * 6;
outBuffer = outBuffer || new Uint16Array(totalIndices);
if (outBuffer.length !== totalIndices) {
throw new Error(`Out buffer length is incorrect, got ${outBuffer.length} and expected ${totalIndices}`);
}
for (let i = 0, j = 0; i < totalIndices; i += 6, j += 4) {
outBuffer[i + 0] = j + 0;
outBuffer[i + 1] = j + 1;
outBuffer[i + 2] = j + 2;
outBuffer[i + 3] = j + 0;
outBuffer[i + 4] = j + 2;
outBuffer[i + 5] = j + 3;
}
return outBuffer;
}
export { createIndicesForQuads };
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