molstar
Version:
A comprehensive macromolecular library.
59 lines • 2.53 kB
JavaScript
/**
* Copyright (c) 2019-2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*/
import { ValueCell } from '../../mol-util/value-cell';
import { Vec2 } from '../../mol-math/linear-algebra';
import { createTextureImage } from '../../mol-gl/renderable/util';
export function applyTransparencyValue(array, start, end, value) {
for (var i = start; i < end; ++i) {
array[i] = value * 255;
}
return true;
}
export function getTransparencyAverage(array, count) {
var sum = 0;
for (var i = 0; i < count; ++i) {
sum += array[i];
}
return sum / (255 * count);
}
export function clearTransparency(array, start, end) {
array.fill(0, start, end);
}
export function createTransparency(count, transparencyData) {
var transparency = createTextureImage(Math.max(1, count), 1, Uint8Array, transparencyData && transparencyData.tTransparency.ref.value.array);
if (transparencyData) {
ValueCell.update(transparencyData.tTransparency, transparency);
ValueCell.update(transparencyData.uTransparencyTexDim, Vec2.create(transparency.width, transparency.height));
ValueCell.updateIfChanged(transparencyData.dTransparency, count > 0);
ValueCell.updateIfChanged(transparencyData.transparencyAverage, getTransparencyAverage(transparency.array, count));
return transparencyData;
}
else {
return {
tTransparency: ValueCell.create(transparency),
uTransparencyTexDim: ValueCell.create(Vec2.create(transparency.width, transparency.height)),
dTransparency: ValueCell.create(count > 0),
transparencyAverage: ValueCell.create(0),
};
}
}
var emptyTransparencyTexture = { array: new Uint8Array(1), width: 1, height: 1 };
export function createEmptyTransparency(transparencyData) {
if (transparencyData) {
ValueCell.update(transparencyData.tTransparency, emptyTransparencyTexture);
ValueCell.update(transparencyData.uTransparencyTexDim, Vec2.create(1, 1));
return transparencyData;
}
else {
return {
tTransparency: ValueCell.create(emptyTransparencyTexture),
uTransparencyTexDim: ValueCell.create(Vec2.create(1, 1)),
dTransparency: ValueCell.create(false),
transparencyAverage: ValueCell.create(0),
};
}
}
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