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more indexing optimizations

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This commit is contained in:
Stewart Allen 2022-04-13 23:31:25 -04:00
commit a1c274341e
2 changed files with 33 additions and 14 deletions
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2
src/mesh/api.js
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@ -424,6 +424,7 @@ const tool = {
models = fallback(models);
api.log.emit('mapping faces').pin();
let promises = [];
// let mark = Date.now();
for (let m of models) {
let p = worker.model_mapFaces({ id: m.id, opt }).then(data => {
// console.log({map_info: data});
@ -432,6 +433,7 @@ const tool = {
}
Promise.all(promises).then(() => {
api.log.emit('mapping complete').unpin();
// api.log.emit(`... time = ${Date.now() - mark}`);
});
},

49
src/mesh/tool.js
View file

@ -107,7 +107,7 @@ mesh.tool = class MeshTool {
const _va = new Vector3();
const _vb = new Vector3();
const _vc = new Vector3();
for (let i=0, l=vertices.length; i<l; ) {
for (let i=0, ni=0, l=vertices.length; i<l; ) {
_va.set(vertices[i++], vertices[i++], vertices[i++]);
_vb.set(vertices[i++], vertices[i++], vertices[i++]);
_vc.set(vertices[i++], vertices[i++], vertices[i++]);
@ -154,11 +154,13 @@ mesh.tool = class MeshTool {
const vcount = vertices.length / 3;
const fcount = vcount / 3;
const vround = vertices.map(v => (v * prec) | 0);
// side records [ fcount, f1, f2 ]
const sides = new Uint32Array(fcount * 3);
// side records [ vi0, vi1, fn1, fn2 ]
const sides = new Uint32Array(fcount * 4);
// map of side index to face count
const srecs = {};
// side extended records when face count exceeds 2 (bad mesh)
const sideExt = {};
// face record array [ ni, s0, s1, s2 ]
// face record array [ nx, ny, nz, sn0, sn1, sn2 ]
const faces = new Float32Array(fcount * 6);
// vertex key to vertex index
const vimap = {};
@ -168,20 +170,24 @@ mesh.tool = class MeshTool {
const simap = {};
// tmp face vertex indices
const vinds = [ 0, 0, 0 ];
// tmp face raw vertex offset
const viraw = [ 0, 0, 0 ];
// tmp vector array
const vects = [ new Vector3(), new Vector3(), new Vector3() ];
// i=vround index, fi=faces record index
// vi=vinds index % 3, x,y,z = tmp vars
// fn=next face index, vn=next vertex index, sn=next side index
for (let i=0, l=vround.length, fn=0, vn=0, sn=0, fi=0, vi=0, x, y, z; i<l; ) {
const vroot = i;
// create unique vertex map
vects[vi].set(x = vround[i++], y = vround[i++], z = vround[i++]);
let key = [ x, y, z ].join(',');
let key = x + ',' + y + ',' + z;
// vertex index
let vid = vimap[key];
if (vid === undefined) {
vid = vimap[key] = vn++;
}
viraw[vi] = vroot;
vinds[vi++] = vid;
// completed record for a face
if (vi === 3) {
@ -189,21 +195,31 @@ mesh.tool = class MeshTool {
const cfn = THREE.computeFaceNormal(...vects);
const [ v0, v1, v2 ] = vinds;
// create consistent side order for index key
const s0 = (v0 < v1 ? [ v0, v1 ] : [ v1, v0 ]).join(',');
const s1 = (v1 < v2 ? [ v1, v2 ] : [ v2, v1 ]).join(',');
const s2 = (v2 < v0 ? [ v2, v0 ] : [ v0, v2 ]).join(',');
const s0 = (v0 < v1 ? v0 + "," + v1 : v1 + "," +v0);
const s1 = (v1 < v2 ? v1 + "," + v2 : v2 + "," +v1);
const s2 = (v2 < v0 ? v2 + "," + v0 : v0 + "," +v2);
// for storing raw vertex offset in side record
const [ vr0, vr1, vr2 ] = viraw;
const vv = [ vr0, vr1, vr1, vr2, vr2, vr0 ];
// store face indexes into sdrec array for each side
const smap = [ s0, s1, s2 ].map(key => {
let sid = simap[key];
const smap = [ s0, s1, s2 ].map((key,ki) => {
let sid = simap[key], sdoff, sdcnt;
if (sid === undefined) {
sid = simap[key] = sn++;
}
let sdoff = sid * 3;
let sdcnt = ++sides[sdoff];
if (sdcnt > 2) {
(sideExt[sid] = sideExt[sid] || [ sides[sdoff + 1], sides[sdoff + 2] ]).push(fn);
sdcnt = srecs[sid] = 1;
sdoff = sid * 4;
sides[sdoff] = vv[ki * 2];
sides[sdoff + 1] = vv[ki * 2 + 1];
} else {
sides[sdoff + sdcnt] = fn;
sdoff = sid * 4;
sdcnt = ++srecs[sid];
}
if (sdcnt > 2) {
(sideExt[sid] = sideExt[sid] ||
[ sides[sdoff], sides[sdoff + 1], sides[sdoff + 2], sides[sdoff + 3] ]
).push(fn);
} else {
sides[sdoff + sdcnt + 1] = fn;
}
return sid;
});
@ -220,6 +236,7 @@ mesh.tool = class MeshTool {
this.indexed = {
faces, sides, sideExt
};
// console.log(this.indexed);
}
getAdjacentFaces(face) {