thallada/planet
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Clean up code a bit

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This commit is contained in:
Tyler Hallada 2019-02-09 19:10:05 -05:00
parent 35bb35415a
commit 1dce74a9ea
1 changed files with 28 additions and 25 deletions
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53
src/index.js
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@ -38,17 +38,21 @@ for (let i = 0; i < geometry.faces.length; i += 1) {
const originalVertCount = geometry.vertices.length;
const calculateCentroid = (pa, pb, pc) => {
const vabHalf = pb.clone().sub(pa).divideScalar(2);
const pabHalf = pa.clone().add(vabHalf);
const centroid = pc.clone().sub(pabHalf).multiplyScalar(1/3).add(pabHalf);
return centroid;
}
const faceCentroids = {};
for (let i = 0; i < geometry.faces.length; i += 1) {
const face = geometry.faces[i];
const vertexA = geometry.vertices[face.a];
const vertexB = geometry.vertices[face.b];
const vertexC = geometry.vertices[face.c];
const vabHalf = vertexB.clone().sub(vertexA).divideScalar(2);
const pabHalf = vertexA.clone().add(vabHalf);
const centroid = vertexC.clone().sub(pabHalf).multiplyScalar(1/3).add(pabHalf);
faceCentroids[i] = centroid;
faceCentroids[i] = calculateCentroid(vertexA, vertexB, vertexC);
}
const findAdjacentFace = (vertexIndex, faces) => {
@ -68,8 +72,21 @@ const findCenterPoint = faces => {
return centerPoint;
}
const midCentroidCache = {};
const calculateMidCentroid = (vertexIndex, faces, centroid) => {
const adjFaceIndex = findAdjacentFace(vertexIndex, faces);
const adjCentroid = faceCentroids[adjFaceIndex];
const midCentroidKey = vertexIndex + ",F" + adjFaceIndex;
let midCentroid = midCentroidCache[midCentroidKey];
if (!midCentroid) {
midCentroid = centroid.clone().lerp(adjCentroid, 0.5);
midCentroidCache[midCentroidKey] = midCentroid;
}
return midCentroid;
}
console.time("dual");
const midVertCache = {};
let hexCount = 0;
let pentCount = 0;
for (let i = 0; i < originalVertCount; i += 1) {
@ -79,8 +96,10 @@ for (let i = 0; i < originalVertCount; i += 1) {
} else if (faces.length === 5) {
pentCount += 1;
}
const color = new THREE.Color(Math.random(), Math.random(), Math.random());
const centerPoint = findCenterPoint(faces);
for (let j = 0; j < faces.length; j += 1) {
const faceIndex = faces[j];
const face = geometry.faces[faceIndex];
@ -88,24 +107,8 @@ for (let i = 0; i < originalVertCount; i += 1) {
sortedVerts.unshift(i)
const centroid = faceCentroids[faceIndex];
const adjBFace = findAdjacentFace(sortedVerts[1], faces);
const adjBCentroid = faceCentroids[adjBFace];
const midBCentroidKey = sortedVerts[1] + ",F" + adjBFace;
let midBCentroid = midVertCache[midBCentroidKey];
if (!midBCentroid) {
midBCentroid = centroid.clone().lerp(adjBCentroid, 0.5);
midVertCache[midBCentroidKey] = midBCentroid;
}
const adjCFace = findAdjacentFace(sortedVerts[2], faces);
const adjCCentroid = faceCentroids[adjCFace];
const midCCentroidKey = sortedVerts[2] + ",F" + adjCFace;
let midCCentroid = midVertCache[midCCentroidKey];
if (!midCCentroid) {
midCCentroid = centroid.clone().lerp(adjCCentroid, 0.5);
midVertCache[midCCentroidKey] = midCCentroid;
}
const midBCentroid = calculateMidCentroid(sortedVerts[1], faces, centroid);
const midCCentroid = calculateMidCentroid(sortedVerts[2], faces, centroid);
newVertices.push(
centerPoint.x, centerPoint.y, centerPoint.z,
@ -138,8 +141,8 @@ function disposeArray() {
console.time("find geo");
const newGeometry = new THREE.BufferGeometry();
newGeometry.addAttribute("position", new THREE.Float32BufferAttribute(newVertices, 3));
newGeometry.addAttribute("color", new THREE.Float32BufferAttribute(colors, 3));
newGeometry.addAttribute("position", new THREE.Float32BufferAttribute(newVertices, 3).onUpload(disposeArray));
newGeometry.addAttribute("color", new THREE.Float32BufferAttribute(colors, 3).onUpload(disposeArray));
newGeometry.computeFaceNormals();
newGeometry.computeVertexNormals();
console.timeEnd("find geo");