@loaders.gl/3d-tiles
Version:
3D Tiles, an open standard for streaming massive heterogeneous 3D geospatial datasets.
65 lines • 2.15 kB
JavaScript
// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright vis.gl contributors
import { decodeRGB565, GL } from '@loaders.gl/math';
/* eslint-disable complexity*/
export function normalize3DTileColorAttribute(tile, colors, batchTable) {
// no colors defined
if (!colors && (!tile || !tile.batchIds || !batchTable)) {
return null;
}
const { batchIds, isRGB565, pointCount = 0 } = tile;
// Batch table, look up colors in table
if (batchIds && batchTable) {
const colorArray = new Uint8ClampedArray(pointCount * 3);
for (let i = 0; i < pointCount; i++) {
const batchId = batchIds[i];
// TODO figure out what is `dimensions` used for
const dimensions = batchTable.getProperty(batchId, 'dimensions');
const color = dimensions.map((d) => d * 255);
colorArray[i * 3] = color[0];
colorArray[i * 3 + 1] = color[1];
colorArray[i * 3 + 2] = color[2];
}
return {
type: GL.UNSIGNED_BYTE,
value: colorArray,
size: 3,
normalized: true
};
}
// RGB565 case, convert to RGB
if (colors && isRGB565) {
const colorArray = new Uint8ClampedArray(pointCount * 3);
for (let i = 0; i < pointCount; i++) {
const color = decodeRGB565(colors[i]);
colorArray[i * 3] = color[0];
colorArray[i * 3 + 1] = color[1];
colorArray[i * 3 + 2] = color[2];
}
return {
type: GL.UNSIGNED_BYTE,
value: colorArray,
size: 3,
normalized: true
};
}
// RGB case (tile.isTranslucent)
if (colors && colors.length === pointCount * 3) {
return {
type: GL.UNSIGNED_BYTE,
value: colors,
size: 3,
normalized: true
};
}
// DEFAULT: RGBA case
return {
type: GL.UNSIGNED_BYTE,
value: colors || new Uint8ClampedArray(),
size: 4,
normalized: true
};
}
/* eslint-enable complexity*/
//# sourceMappingURL=normalize-3d-tile-colors.js.map