Accueil / npm / three@0.171.0 / src / renderers / common / BufferUtils.js

BufferUtils.js

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import { GPU_CHUNK_BYTES } from './Constants.js';

function getFloatLength( floatLength ) {

	// ensure chunk size alignment (STD140 layout)

	return floatLength + ( ( GPU_CHUNK_BYTES - ( floatLength % GPU_CHUNK_BYTES ) ) % GPU_CHUNK_BYTES );

}

function getVectorLength( count, vectorLength = 4 ) {

	const strideLength = getStrideLength( vectorLength );

	const floatLength = strideLength * count;

	return getFloatLength( floatLength );

}

function getStrideLength( vectorLength ) {

	const strideLength = 4;

	return vectorLength + ( ( strideLength - ( vectorLength % strideLength ) ) % strideLength );

}

export {
	getFloatLength,
	getVectorLength,
	getStrideLength
};