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speed up face generation for healing

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This commit is contained in:
Stewart Allen 2021-12-09 21:33:05 -05:00
commit 955d9b9a3f
4 changed files with 36 additions and 24 deletions
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48
src/geo/mesh.js
View file

@ -5,6 +5,7 @@
(function() {
const BASE = self.base = self.base || {};
const TEST = 0;
if (BASE.Mesh) {
return;
@ -12,7 +13,7 @@
BASE.Mesh = class Mesh {
constructor(params = {}) {
this.precision = params.precision || 6;
this.precision = Math.pow(10, params.precision || 6);
if (params.vertices) {
this.setData(params.vertices, params.faces);
}
@ -38,21 +39,24 @@
}
// when face/index data is missing, vertices need to be normalized
if (!faces) {
if (TEST) console.time('generate faces');
faces = [];
let fcac = {}; // seen face hash
let fnew = []; // accumulate vertex triplets
let nuvt = []; // new vertex list
let hash = {}; // find vertex matches
let prec = this.precision;
let dups = 0;
// let cull = 0;
for (let i=0, l=vertices.length; i<l; i += 3) {
let x = vertices[i];
let y = vertices[i+1];
let z = vertices[i+2];
let key = [
x.toFixed(prec),
y.toFixed(prec),
z.toFixed(prec)
].join(',');
(x * prec) | 0,
(y * prec) | 0,
(z * prec) | 0
].join('');
let vpos = hash[key];
if (vpos === undefined) {
hash[key] = vpos = nuvt.length;
@ -63,20 +67,25 @@
fnew.push(vpos);
if (fnew.length === 3) {
// cull invalid faces (shares 2 or more points)
if (fnew[0] === fnew[1] || fnew[0] === fnew[2] || fnew[1] === fnew[2]) {
fnew = [];
continue;
}
// if (fnew[0] === fnew[1] || fnew[0] === fnew[2] || fnew[1] === fnew[2]) {
// fnew = [];
// cull++;
// continue;
// }
let key = fnew.slice().sort().join('-');
// drop duplicate faces (even when reversed - thus the sort)
// drop duplicate faces (sort handles reverse order)
if (!fcac[key]) {
faces.appendAll(fnew);
} else {
dups++;
}
fcac[key] = key;
fnew = [];
}
}
vertices = nuvt;
if (TEST) console.timeEnd('generate faces');
if (TEST) console.log({dups, faces:faces.length/3});
}
this.vertices = vertices;
this.faces = faces;
@ -101,6 +110,8 @@
* connect lines into polys. earcut polys into new faces.
*/
heal() {
if (TEST) console.time('heal');
let vertices = this.vertices;
let faces = this.faces;
let hash = {}; // key to line map
@ -117,7 +128,7 @@
addFace(face) {
if (this.faces.indexOf(face) < 0) {
this.faces.push(face);
} else {
} else if (TEST) {
console.log('adding face to line twice', this, face);
}
return this;
@ -204,7 +215,6 @@
// lines belonging to only one face are on the edge of a hole
let edges = this.edges = lines.filter(l => l.faces.length === 1);
let loops = this.loops = [];
// console.log({edges});
// connect edge lines into closed loops
for (let i=0, l=edges.length; i<l; i++) {
@ -237,7 +247,7 @@
let tmp = adjacent[0].v1;
adjacent[0].v1 = adjacent[0].v2;
adjacent[0].v2 = tmp;
// console.log('chirality mismatch fixed');
if (TEST > 1) console.log('chirality mismatch fixed');
}
line = adjacent[0];
} else if (adjacent.length === 2) {
@ -246,7 +256,7 @@
adjacent[0] :
adjacent[1]
} else {
// console.log('error adjacent', line, adjacent, loops.length, loop.length);
if (TEST > 1) console.log('error adjacent', line, adjacent, loops.length, loop.length);
line.split = adjacent;
line = adjacent[0];
}
@ -290,13 +300,14 @@
}
}
// console.log({loops})
// store invalid loops for display / culling
this.shorts = loops.filter(l => l && l.length <= 2);
if (TEST) console.log({edges, loops, shorts: this.shorts});
// filter out null and short loops
this.loops = loops = loops.filter(l => l && l.length > 2);
// console.log({loops})
if (TEST > 1) console.log({loops_filtered: loops});
// rotate/flatten to Z plane and use earcut to generate faces
// because earcut emits point indexes, no need to un-rotate
@ -353,7 +364,7 @@
let fpoints = points.flat();
let ec = earcut(fpoints, undefined, 3);
// console.log({points, fpoints, ec, dx, dy, dz});
if (TEST > 2) console.log({points, fpoints, ec, dx, dy, dz});
for (let point of ec) {
faces.push(pindex[point]);
@ -367,8 +378,9 @@
}
this.newFaces = this.faces.length - faceCount;
// console.log({newFaces: this.newFaces});
if (TEST) console.log({newFaces: this.newFaces});
if (TEST) console.timeEnd('heal');
return this;
}
};

4
src/kiri/client.js
View file

@ -126,8 +126,8 @@ KIRI.work = {
});
},
heal: function(vertices, callback) {
send("heal", {vertices}, function(output) {
heal: function(vertices, callback, refresh) {
send("heal", {vertices, refresh}, function(output) {
callback(output);
});
},

4
src/kiri/widget.js
View file

@ -386,7 +386,7 @@ console.log/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
}
};
PRO.heal = function(debug) {
PRO.heal = function(debug, refresh) {
if (debug) {
let mesh = this.debugMesh().heal();
let verts = mesh.vertices;
@ -430,7 +430,7 @@ console.log/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
this.modified = false;
}
resolve(this.modified);
});
}, refresh);
});
};

4
src/kiri/worker.js
View file

@ -203,9 +203,9 @@ KIRI.worker = {
},
heal: function(data, send) {
let { vertices } = data;
let { vertices, refresh } = data;
let mesh = new base.Mesh({vertices}).heal();
if (mesh.newFaces) {
if (mesh.newFaces || refresh) {
vertices = mesh.unrolled().toFloat32();
send.done({vertices}, [vertices]);
} else {