molstar
Version:
A comprehensive macromolecular library.
95 lines • 4.47 kB
JavaScript
/**
* Copyright (c) 2018-2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
* @author David Sehnal <david.sehnal@gmail.com>
* @author Fred Ludlow <fred.ludlow@gmail.com>
*/
import { ChunkedArray } from '../../../mol-data/util';
import { noop } from '../../../mol-util';
import { Mesh } from '../../geometry/mesh/mesh';
import { AllowedContours } from './tables';
import { LinesBuilder } from '../../geometry/lines/lines-builder';
export function MarchinCubesMeshBuilder(vertexChunkSize, mesh) {
var triangleChunkSize = Math.min(1 << 16, vertexChunkSize * 4);
var vertices = ChunkedArray.create(Float32Array, 3, vertexChunkSize, mesh && mesh.vertexBuffer.ref.value);
var normals = ChunkedArray.create(Float32Array, 3, vertexChunkSize, mesh && mesh.normalBuffer.ref.value);
var groups = ChunkedArray.create(Float32Array, 1, vertexChunkSize, mesh && mesh.groupBuffer.ref.value);
var indices = ChunkedArray.create(Uint32Array, 3, triangleChunkSize, mesh && mesh.indexBuffer.ref.value);
var vertexCount = 0;
var triangleCount = 0;
return {
addVertex: function (x, y, z) {
++vertexCount;
return ChunkedArray.add3(vertices, x, y, z);
},
addNormal: function (x, y, z) {
ChunkedArray.add3(normals, x, y, z);
},
addGroup: function (group) {
ChunkedArray.add(groups, group);
},
addTriangle: function (vertList, a, b, c) {
var i = vertList[a], j = vertList[b], k = vertList[c];
// vertex indices <0 mean that the vertex was ignored and is not available
// and hence we don't add a triangle when this occurs
if (i >= 0 && j >= 0 && k >= 0) {
++triangleCount;
ChunkedArray.add3(indices, i, j, k);
}
},
get: function () {
var vb = ChunkedArray.compact(vertices, true);
var nb = ChunkedArray.compact(normals, true);
var ib = ChunkedArray.compact(indices, true);
var gb = ChunkedArray.compact(groups, true);
return Mesh.create(vb, ib, nb, gb, vertexCount, triangleCount, mesh);
}
};
}
export function MarchinCubesLinesBuilder(vertexChunkSize, lines) {
var vertices = ChunkedArray.create(Float32Array, 3, vertexChunkSize);
var groups = ChunkedArray.create(Float32Array, 1, vertexChunkSize);
var indices = ChunkedArray.create(Float32Array, 2, vertexChunkSize);
var linesCount = 0;
return {
addVertex: function (x, y, z) {
return ChunkedArray.add3(vertices, x, y, z);
},
addNormal: function () { return noop; },
addGroup: function (group) {
ChunkedArray.add(groups, group);
},
addTriangle: function (vertList, a, b, c, edgeFilter) {
var i = vertList[a], j = vertList[b], k = vertList[c];
// vertex indices <0 mean that the vertex was ignored and is not available
// and hence we don't add a triangle when this occurs
if (i >= 0 && j >= 0 && k >= 0) {
if (AllowedContours[a][b] & edgeFilter) {
++linesCount;
ChunkedArray.add2(indices, vertList[a], vertList[b]);
}
if (AllowedContours[b][c] & edgeFilter) {
++linesCount;
ChunkedArray.add2(indices, vertList[b], vertList[c]);
}
if (AllowedContours[a][c] & edgeFilter) {
++linesCount;
ChunkedArray.add2(indices, vertList[a], vertList[c]);
}
}
},
get: function () {
var vb = ChunkedArray.compact(vertices, true);
var ib = ChunkedArray.compact(indices, true);
var gb = ChunkedArray.compact(groups, true);
var builder = LinesBuilder.create(linesCount, linesCount / 10, lines);
for (var i = 0; i < linesCount; ++i) {
var la = ib[i * 2], lb = ib[i * 2 + 1];
builder.add(vb[la * 3], vb[la * 3 + 1], vb[la * 3 + 2], vb[lb * 3], vb[lb * 3 + 1], vb[lb * 3 + 2], gb[la]);
}
return builder.getLines();
}
};
}
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