ts voronoi
This commit is contained in:
ajuvercr
parent
d6ff2ea1e9
commit
e281a1683d
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@ -361,4 +361,19 @@ function step(time: number) {
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}
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set_loading(true);
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requestAnimationFrame(step);
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// requestAnimationFrame(step);
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import { voronoi, Point } from './voronoi'
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function test() {
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const points = [
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new Point(5,5),
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new Point(1, 8),
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new Point(8,8),
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new Point(10,2),
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];
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console.log(voronoi(points));
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}
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test();
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39
frontend/www/package-lock.json
generated
39
frontend/www/package-lock.json
generated
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@ -5505,8 +5505,7 @@
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"source-map": {
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"version": "0.5.7",
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"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
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"integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
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"dev": true
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"integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
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},
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"source-map-resolve": {
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"version": "0.5.2",
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@ -5681,9 +5680,20 @@
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"quote-stream": "~0.0.0",
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"readable-stream": "~1.0.27-1",
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"shallow-copy": "~0.0.1",
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"static-eval": "~0.2.0",
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"through2": "~0.4.1"
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},
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"dependencies": {
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"esprima": {
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"version": "1.0.4",
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"resolved": "https://registry.npmjs.org/esprima/-/esprima-1.0.4.tgz",
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"integrity": "sha1-n1V+CPw7TSbs6d00+Pv0drYlha0="
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},
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"estraverse": {
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"version": "1.3.2",
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"resolved": "https://registry.npmjs.org/estraverse/-/estraverse-1.3.2.tgz",
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"integrity": "sha1-N8K4k+8T1yPydth41g2FNRUqbEI="
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},
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"isarray": {
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"version": "0.0.1",
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"resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
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@ -5705,6 +5715,26 @@
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"string_decoder": "~0.10.x"
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}
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},
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"static-eval": {
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"version": "0.2.4",
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"resolved": "https://registry.npmjs.org/static-eval/-/static-eval-0.2.4.tgz",
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"integrity": "sha1-t9NNg4k3uWn5ZBygfUj47eJj6ns=",
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"requires": {
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"escodegen": "~0.0.24"
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},
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"dependencies": {
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"escodegen": {
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"version": "0.0.28",
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"resolved": "https://registry.npmjs.org/escodegen/-/escodegen-0.0.28.tgz",
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"integrity": "sha1-Dk/xcV8yh3XWyrUaxEpAbNer/9M=",
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"requires": {
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"esprima": "~1.0.2",
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"estraverse": "~1.3.0",
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"source-map": ">= 0.1.2"
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}
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}
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}
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},
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"string_decoder": {
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"version": "0.10.31",
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"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
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@ -6016,6 +6046,11 @@
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"integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==",
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"dev": true
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},
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"ts-heap": {
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"version": "1.1.3",
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"resolved": "https://registry.npmjs.org/ts-heap/-/ts-heap-1.1.3.tgz",
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"integrity": "sha512-SjuxU4q6ulbhkIRp6ye5A7+hG19WGrVWzDCfit6i0FYup2WxcbWtWwdSMmtBaf4zc4kmOPcWNd2fBBtKB6ZH1g=="
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},
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"ts-loader": {
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"version": "6.1.0",
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"resolved": "https://registry.npmjs.org/ts-loader/-/ts-loader-6.1.0.tgz",
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@ -25,7 +25,8 @@
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"extract-svg-path": "^2.1.0",
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"load-svg": "^1.0.0",
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"planetwars": "file:../pkg",
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"svg-mesh-3d": "^1.1.0"
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"svg-mesh-3d": "^1.1.0",
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"ts-heap": "^1.1.3"
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},
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"author": "Arthur Vercruysse <arthur.vercruysse@outlook.com>",
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"license": "(MIT OR Apache-2.0)",
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411
frontend/www/voronoi.ts
Normal file
411
frontend/www/voronoi.ts
Normal file
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@ -0,0 +1,411 @@
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import { Heap } from 'ts-heap'
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import { handle } from './games';
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interface WithPriority {
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get_priority(): number;
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}
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export class Point {
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x: number;
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y: number;
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constructor(x: number, y: number) {
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this.x = x;
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this.y = y;
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}
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equals(other: Point): boolean {
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return Math.abs(this.x - other.x) + Math.abs(this.y - other.y) < 0.00001;
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}
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}
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class CircleEvent implements WithPriority {
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y: number;
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alive: boolean = true;
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center: Point;
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leaf: Leaf;
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from: Point[];
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static
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from_sites(s1: Point, s2: Point, s3: Point, leaf: Leaf): CircleEvent {
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const a = s1.x * (s2.y - s3.y) - s1.y*(s2.x - s3.x) + s2.x*s3.y - s3.x * s2.y;
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const b = (s1.x ** 2 + s1.y ** 2) * (s3.y - s2.y) + (s2.x ** 2 + s2.y ** 2)*(s1.y - s3.y) + (s3.x ** 2 + s3.y ** 2) * (s2.y - s1.y);
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const c = (s1.x ** 2 + s1.y ** 2) * (s2.x - s3.x) + (s2.x ** 2 + s2.y ** 2)*(s3.x - s1.x) + (s3.x ** 2 + s3.y ** 2) * (s1.x - s2.x);
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const d = (s1.x ** 2 + s1.y ** 2) * (s3.x*s2.y - s2.x*s3.y) + (s2.x ** 2 + s2.y ** 2)*(s1.x*s3.y - s3.x*s1.y) + (s3.x ** 2 + s3.y ** 2) * (s2.x*s1.y - s1.x*s2.y);
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const center = new Point(-b / (2. * a), -c / (2. * a));
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const r = Math.sqrt((b ** 2 + c ** 2 - 4. * a * d) / (4. * a ** 2));
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const y = center.y - r;
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const out = new CircleEvent();
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out.y = y;
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out.center = center;
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out.leaf = leaf;
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out.from = [s1, s2, s3];
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return out;
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}
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get_priority(): number {
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return this.y;
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}
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print() {
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console.log(`Circle event at ${this.y} ${JSON.stringify(this.center)}, ${JSON.stringify(this.leaf.point)} from ${JSON.stringify(this.from)}`);
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}
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}
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class SiteEvent implements WithPriority{
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point: Point;
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constructor(point: Point) {
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this.point = point;
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}
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get_priority(): number {
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return this.point.y;
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}
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print() {
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console.log(`Site event ${JSON.stringify(this.point)}`);
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}
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}
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function calc_x(left: Point, right: Point, y: number): number {
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const [a1, b1, c1] = from_focus_vertex(left, y);
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const [a2, b2, c2] = from_focus_vertex(right, y);
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const da = a1 - a2;
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const db = b1 - b2;
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const dc = c1 - c2;
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const d = db * db - 4. * da * dc;
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if (d < 0.) {
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throw new Error(`D is less then 0 ${d}`);
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}
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const dd = Math.sqrt(d);
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const x = (-db + dd) / (2. * da);
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return x;
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}
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function from_focus_vertex(focus: Point, y: number): number[] {
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const a = (focus.y - y) / 2;
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const h = focus.x;
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const k = focus.y - a;
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return [1 / (4. * a), -h / (2 * a), (h ** 2 / (4 * a)) + k]
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}
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function cmp_event(e1: WithPriority, e2: WithPriority) {
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return e2.get_priority() - e1.get_priority();
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}
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type Queue = Heap<WithPriority>;
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type Node = Leaf | Breakpoint;
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type Parent = Breakpoint | State;
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class Leaf {
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point: Point;
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event: CircleEvent | undefined;
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left: Leaf | undefined;
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right: Leaf | undefined;
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parent: Parent;
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constructor(point: Point, parent: Parent) {
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this.point = point;
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this.parent = parent;
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}
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false_alarm() {
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if(this.event) {
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console.log(`False alarm ${JSON.stringify(this.event.center)} ${this.event.y}`);
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this.event.alive = false;
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}
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}
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update_left(leaf: Leaf) {
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if (this.left) {
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this.left.right = leaf;
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}
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leaf.left = this.left;
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}
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update_right(leaf: Leaf) {
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if (this.right) {
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this.right.left = leaf;
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}
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leaf.right = this.right;
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}
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split(point: Point, events: Queue) {
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this.false_alarm();
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const left = new Leaf(this.point, undefined);
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left.left = this.left;
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if (this.left) this.left.right = left;
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const right = new Leaf(this.point, undefined);
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right.right = this.right;
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if (this.right) this.right.left = right;
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const middle = new Leaf(point, undefined);
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middle.left = left;
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middle.right = right;
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right.left = middle;
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left.right = middle;
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const br1 = new Breakpoint([this.point, left], [point, middle], undefined);
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const br2 = new Breakpoint([point, br1], [this.point, right], this.parent);
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br1.parent = br2;
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if (this.parent instanceof Breakpoint) {
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this.parent.set_me(this, br2);
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} else {
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this.parent.root = br2;
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}
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const maybe_left = left.check_circles(point.y, events);
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if (maybe_left && maybe_left.center.x < middle.point.x) {
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console.log(`Adding circle event left ${JSON.stringify(maybe_left.leaf.point)}`);
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maybe_left.print();
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left.event = maybe_left;
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events.add(maybe_left);
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}
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const maybe_right = right.check_circles(point.y, events);
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if (maybe_right && maybe_right.center.x >= middle.point.x) {
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console.log(`Adding circle event right`);
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maybe_right.print();
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right.event = maybe_right;
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events.add(maybe_right);
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}
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}
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check_circles(y: number, events: Queue): CircleEvent | undefined {
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const left = this.left;
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const right = this.right;
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if (left && right) {
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const circle = CircleEvent.from_sites(left.point, this.point, right.point, this);
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console.log(`${circle.y} < ${y}`);
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if (circle.y < y ) {
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return circle;
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}
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}
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}
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delete() {
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if (this.parent instanceof Breakpoint) {
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this.parent.remove_me(this.point);
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} else {
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console.error("Shouldnt be here");
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}
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}
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print(indent: string) {
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console.log(`${indent}Leaf from ${JSON.stringify(this.point)}`);
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}
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}
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class Breakpoint {
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left: [Point, Node];
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right: [Point, Node];
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parent: Parent;
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constructor(left: [Point, Node], right: [Point, Node], parent: Parent) {
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this.left = left;
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this.right = right;
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this.left[1].parent = this;
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this.right[1].parent = this;
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this.parent = parent;
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}
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remove_me(point: Point) {
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const other = this.get_other(point);
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if (this.parent instanceof Breakpoint) {
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console.log("Parent is still breakpoint");
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this.parent.set_me(this, other);
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} else {
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console.log("Parent is root");
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this.parent.root = other;
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}
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}
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set_me(old_me: Node, new_me: Node) {
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if (this.left[1] == old_me) {
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console.log("Setting other left");
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this.left[1] = new_me;
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} else {
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console.log("Setting other right");
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this.right[1] = new_me;
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}
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}
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get(point: Point): Leaf {
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const { x, y } = point;
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const test_x = calc_x(this.left[0], this.right[0], y);
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console.log(`${test_x} >= ${x}`);
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if (test_x >= x) {
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console.log("Going left");
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if (this.left[1] instanceof Leaf) {
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return this.left[1];
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} else {
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return this.left[1].get(point);
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}
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} else {
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console.log("Going right");
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if (this.right[1] instanceof Leaf) {
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return this.right[1];
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} else {
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return this.right[1].get(point);
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}
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}
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}
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get_other(point: Point): Node {
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if (this.left[0].equals(point)) {
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console.log("Other is right");
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return this.right[1];
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} else {
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console.log("Other is left");
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return this.left[1];
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}
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}
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print(indent: string) {
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console.log(`${indent}left`);
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this.left[1].print(indent + ' ');
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console.log(`${indent}right`);
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this.right[1].print(indent + ' ');
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}
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}
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function get_from_node(root: Node, point: Point): Leaf {
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if (root instanceof Leaf) {
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return root;
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} else {
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return root.get(point);
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}
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}
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class State {
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root: Node | undefined;
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print() {
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if (this.root) {
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this.root.print('');
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} else {
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console.log("No root no tree");
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}
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}
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}
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export function voronoi(points: Point[]): Point[] {
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const out = [];
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const state = new State;
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const queue = new Heap<WithPriority>(cmp_event);
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for (let point of points) {
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queue.add(new SiteEvent(point));
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}
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let event;
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while (event = queue.pop()){
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console.log('---------------------------');
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event.print();
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if (event instanceof SiteEvent) {
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handle_site_event(event, queue, state, out);
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} else {
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if (!event.alive) {
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console.log("Dead");
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continue;
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}
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handle_circle_event(event, queue, state, out);
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}
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state.print();
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console.log(queue);
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print_leaves(get_from_node(state.root, new Point(0, 0)));
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}
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return out;
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}
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function handle_site_event(event: SiteEvent, queue: Queue, state: State, out: Point[]) {
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if (state.root) {
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const leaf = get_from_node(state.root, event.point);
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console.log(`Splitting leaf from ${JSON.stringify(leaf.point)}`);
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leaf.split(event.point, queue);
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} else {
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state.root = new Leaf(event.point, state);
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}
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}
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function handle_circle_event(event: CircleEvent, queue: Queue, state: State, out: Point[]) {
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if (!event.alive) return;
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event.leaf.delete();
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const right = event.leaf.right;
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const left = event.leaf.left;
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if (right) {
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right.false_alarm();
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if (right.right) right.right.false_alarm();
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right.left = left;
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const maybe_right = right.check_circles(event.y, queue);
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if (maybe_right){
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||||
console.log(`Adding circle event`);
|
||||
maybe_right.print();
|
||||
right.event = maybe_right;
|
||||
queue.add(maybe_right);
|
||||
}
|
||||
}
|
||||
|
||||
if (left) {
|
||||
left.false_alarm();
|
||||
if (left.left) left.left.false_alarm();
|
||||
left.right = right;
|
||||
const maybe_left = left.check_circles(event.y, queue);
|
||||
|
||||
if (maybe_left){
|
||||
console.log(`Adding circle event`);
|
||||
maybe_left.print();
|
||||
left.event = maybe_left;
|
||||
queue.add(maybe_left);
|
||||
}
|
||||
}
|
||||
|
||||
out.push(event.center);
|
||||
}
|
||||
|
||||
function print_leaves(start: Leaf) {
|
||||
let current = start;
|
||||
|
||||
while (current.left) {
|
||||
current = current.left;
|
||||
}
|
||||
|
||||
const points = [current.point];
|
||||
|
||||
while (current.right) {
|
||||
current = current.right;
|
||||
points.push(current.point);
|
||||
}
|
||||
|
||||
console.log(JSON.stringify(points));
|
||||
}
|
||||
Loading…
Reference in a new issue