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Added weight-based mesh centreing

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Lucas Dower 2021-10-30 21:43:08 +01:00
parent cf9e02d29a
commit 0d17b2da1b
1 changed files with 9 additions and 8 deletions
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17
src/mesh.ts
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@ -6,6 +6,7 @@ import { Triangle } from "./triangle";
import { Vector3 } from "./vector";
import { RGB, UV } from "./util";
import { TextureFormat } from "./texture";
import { triangleArea } from "./math";
type VertexMap<T> = { [index: number]: T };
@ -335,20 +336,20 @@ export class Mesh {
}
// TODO: Factor in triangle's size, perform weighted sum
// to prevent areas of dense triangles dominating
private _centreMesh() {
// Find the centre
let centre = new Vector3(0, 0, 0);
let count = 0;
let totalWeight = 0;
this.materials.forEach(material => {
material.faces.forEach(face => {
centre.add(face.getCentre());
++count;
const k0 = Vector3.sub(face.v0.position, face.v1.position).magnitude();
const k1 = Vector3.sub(face.v1.position, face.v2.position).magnitude();
const k2 = Vector3.sub(face.v2.position, face.v0.position).magnitude();
const weight = triangleArea(k0, k1, k2);
totalWeight += weight
centre.add(face.getCentre().mulScalar(weight));
});
});
centre.divScalar(count);
console.log(centre);
centre.divScalar(totalWeight);
// Translate each triangle
this.materials.forEach(material => {