diff options
Diffstat (limited to 'client/util/vendor')
| -rw-r--r-- | client/util/vendor/geometryHelper.js | 132 |
1 files changed, 66 insertions, 66 deletions
diff --git a/client/util/vendor/geometryHelper.js b/client/util/vendor/geometryHelper.js index 1ac88f3b..7f699722 100644 --- a/client/util/vendor/geometryHelper.js +++ b/client/util/vendor/geometryHelper.js @@ -23,84 +23,84 @@ import * as THREE from 'three'; function GeometryHelper() {} GeometryHelper.prototype = { - constructor: GeometryHelper, + constructor: GeometryHelper, - // Computes vertex normals on THREE.js buffer geometry, even when the mesh - // uses triangle strip connectivity. - computeVertexNormals: function (bufferGeometry) { - if (bufferGeometry.drawMode === THREE.TrianglesDrawMode) { - bufferGeometry.computeVertexNormals(); + // Computes vertex normals on THREE.js buffer geometry, even when the mesh + // uses triangle strip connectivity. + computeVertexNormals: function (bufferGeometry) { + if (bufferGeometry.drawMode === THREE.TrianglesDrawMode) { + bufferGeometry.computeVertexNormals(); + return; + } else if (bufferGeometry.drawMode === THREE.TriangleStripDrawMode) { + if (bufferGeometry.attributes.position === undefined) { return; - } else if (bufferGeometry.drawMode === THREE.TriangleStripDrawMode) { - if (bufferGeometry.attributes.position === undefined) { - return; - } - const inPositions = bufferGeometry.attributes.position.array; - if (bufferGeometry.attributes.normal === undefined) { - bufferGeometry.addAttribute( - 'normal', - new THREE.BufferAttribute(new Float32Array(inPositions.length), - 3)); - } else { - // Reset existing normals to zero. - const array = bufferGeometry.attributes.normal.array; - for (let i = 0; i < array.length; ++i) { - array[ i ] = 0; - } + } + const inPositions = bufferGeometry.attributes.position.array; + if (bufferGeometry.attributes.normal === undefined) { + bufferGeometry.addAttribute( + 'normal', + new THREE.BufferAttribute(new Float32Array(inPositions.length), + 3)); + } else { + // Reset existing normals to zero. + const array = bufferGeometry.attributes.normal.array; + for (let i = 0; i < array.length; ++i) { + array[ i ] = 0; } - let outNormals = bufferGeometry.attributes.normal.array; + } + let outNormals = bufferGeometry.attributes.normal.array; - let pos0 = new THREE.Vector3(); - let pos1 = new THREE.Vector3(); - let pos2 = new THREE.Vector3(); - let posDif0 = new THREE.Vector3(), posDif1 = new THREE.Vector3(); - let localNormal = new THREE.Vector3(); + let pos0 = new THREE.Vector3(); + let pos1 = new THREE.Vector3(); + let pos2 = new THREE.Vector3(); + let posDif0 = new THREE.Vector3(), posDif1 = new THREE.Vector3(); + let localNormal = new THREE.Vector3(); - const stripIndices = bufferGeometry.index.array; - for (let i = 2; i < stripIndices.length; ++i) { - let index0 = stripIndices[i - 2] * 3; - let index1 = stripIndices[i - 1] * 3; - let index2 = stripIndices[i] * 3; - // Skip degenerate triangles. - if (index0 === index1 || index0 === index2 || index1 === index2) { - continue; - } - if ((i & 1) !== 0) { - // Swap index 1 and 0 on odd indexed triangles. - const tmpIndex = index1; - index1 = index2; - index2 = tmpIndex; - } + const stripIndices = bufferGeometry.index.array; + for (let i = 2; i < stripIndices.length; ++i) { + let index0 = stripIndices[i - 2] * 3; + let index1 = stripIndices[i - 1] * 3; + let index2 = stripIndices[i] * 3; + // Skip degenerate triangles. + if (index0 === index1 || index0 === index2 || index1 === index2) { + continue; + } + if ((i & 1) !== 0) { + // Swap index 1 and 0 on odd indexed triangles. + const tmpIndex = index1; + index1 = index2; + index2 = tmpIndex; + } - // Get position values. - pos0.fromArray(inPositions, index0); - pos1.fromArray(inPositions, index1); - pos2.fromArray(inPositions, index2); + // Get position values. + pos0.fromArray(inPositions, index0); + pos1.fromArray(inPositions, index1); + pos2.fromArray(inPositions, index2); - // Position differences - posDif0.subVectors(pos2, pos0); - posDif1.subVectors(pos1, pos0); + // Position differences + posDif0.subVectors(pos2, pos0); + posDif1.subVectors(pos1, pos0); - // Weighted normal. - localNormal.crossVectors(posDif1, posDif0); + // Weighted normal. + localNormal.crossVectors(posDif1, posDif0); - // Update normals on vertices - outNormals[index0] += localNormal.x; - outNormals[index0 + 1] += localNormal.y; - outNormals[index0 + 2] += localNormal.z; + // Update normals on vertices + outNormals[index0] += localNormal.x; + outNormals[index0 + 1] += localNormal.y; + outNormals[index0 + 2] += localNormal.z; - outNormals[index1] += localNormal.x; - outNormals[index1 + 1] += localNormal.y; - outNormals[index1 + 2] += localNormal.z; + outNormals[index1] += localNormal.x; + outNormals[index1 + 1] += localNormal.y; + outNormals[index1 + 2] += localNormal.z; - outNormals[index2] += localNormal.x; - outNormals[index2 + 1] += localNormal.y; - outNormals[index2 + 2] += localNormal.z; - } - bufferGeometry.normalizeNormals(); - bufferGeometry.attributes.normal.needsUpdate = true; + outNormals[index2] += localNormal.x; + outNormals[index2 + 1] += localNormal.y; + outNormals[index2 + 2] += localNormal.z; } - }, + bufferGeometry.normalizeNormals(); + bufferGeometry.attributes.normal.needsUpdate = true; + } + }, }; export default GeometryHelper |