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author | Matthias Schiffer <mschiffer@universe-factory.net> | 2018-12-08 12:39:18 +0100 |
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committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2018-12-08 12:39:18 +0100 |
commit | b3950330e3351437f153c6c1debb3821d6e28864 (patch) | |
tree | 0b381b523045bd59cd679825a11976a45813fc24 /src/math | |
parent | 439dcf391784ea3abb61473c74b9c27fcd9fdc2d (diff) | |
download | rpgedit-b3950330e3351437f153c6c1debb3821d6e28864.tar rpgedit-b3950330e3351437f153c6c1debb3821d6e28864.zip |
Create Electron app
Diffstat (limited to 'src/math')
-rw-r--r-- | src/math/circle.ts | 15 | ||||
-rw-r--r-- | src/math/collision.ts | 7 | ||||
-rw-r--r-- | src/math/line.ts | 141 | ||||
-rw-r--r-- | src/math/point.ts | 40 |
4 files changed, 0 insertions, 203 deletions
diff --git a/src/math/circle.ts b/src/math/circle.ts deleted file mode 100644 index f4e855a..0000000 --- a/src/math/circle.ts +++ /dev/null @@ -1,15 +0,0 @@ -import { Collidable } from './collision'; -import { Movement } from './line'; -import { Point } from './point'; - -import { vec2 } from 'gl-matrix'; - -export class Circle implements Collidable, Point { - private pointCollide = Point.prototype.collide; - - constructor(public readonly p: vec2, public readonly r: number) {} - - public collide(out: vec2, move: Movement, r: number): boolean { - return this.pointCollide(out, move, r + this.r); - } -} diff --git a/src/math/collision.ts b/src/math/collision.ts deleted file mode 100644 index 3df811a..0000000 --- a/src/math/collision.ts +++ /dev/null @@ -1,7 +0,0 @@ -import { Movement } from './line'; - -import { vec2 } from 'gl-matrix'; - -export interface Collidable { - collide(out: vec2, move: Movement, r: number): boolean; -} diff --git a/src/math/line.ts b/src/math/line.ts deleted file mode 100644 index db99035..0000000 --- a/src/math/line.ts +++ /dev/null @@ -1,141 +0,0 @@ -import { mat2, vec2 } from 'gl-matrix'; -import { Collidable } from './collision'; - -const rot90 = mat2.fromValues( - 0, 1, - -1, 0, -); - -export function normal(out: vec2, a: vec2): vec2 { - return vec2.transformMat2(out, a, rot90); -} - -export function crossz(a: vec2, b: vec2): number { - return a[0] * b[1] - a[1] * b[0]; -} - -export class Line { - constructor( - public readonly p: vec2, - public readonly v: vec2, - ) {} - - public getNormal(out: vec2): vec2 { - return normal(out, this.v); - } - - public projectPointDistance(p2: vec2): number { - const v2 = vec2.sub(vec2.create(), p2, this.p); - return vec2.dot(this.v, v2); - } - - public projectPoint(out: vec2, p2: vec2): vec2 { - const d = this.projectPointDistance(p2); - return vec2.scaleAndAdd(out, this.p, this.v, d); - } - - public distancePoint(p2: vec2): number { - const v2 = vec2.sub(vec2.create(), p2, this.p); - return crossz(this.v, v2); - } - - public intersectLine(out: vec2, l2: Line): vec2 { - const vp = vec2.sub(vec2.create(), l2.p, this.p); - const d = crossz(vp, this.v); - const d2 = d / crossz(this.v, l2.v); - return vec2.scaleAndAdd(out, l2.p, l2.v, d2); - } -} - -export class Movement { - public readonly v: vec2; - - constructor( - public readonly src: vec2, - public readonly dest: vec2, - ) { - this.v = vec2.sub(vec2.create(), dest, src); - } - - public intersectLine(out: vec2, l: Line): vec2 { - const vp = vec2.sub(vec2.create(), l.p, this.src); - const d = crossz(vp, this.v); - const d2 = d / crossz(this.v, l.v); - return vec2.scaleAndAdd(out, l.p, l.v, d2); - } - - public passes(p: vec2): boolean { - const vp = vec2.sub(vec2.create(), p, this.src); - const d = vec2.dot(this.v, vp); - return d >= 0 && d <= vec2.sqrLen(this.v); - } - - public toLineSegment(): LineSegment { - return LineSegment.fromPoints(this.src, this.dest); - } - - public translate(t: vec2): Movement { - const src = vec2.add(vec2.create(), this.src, t); - const dest = vec2.add(vec2.create(), this.dest, t); - return new Movement(src, dest); - } -} - -export class LineSegment extends Line implements Collidable { - public static fromPoints(p1: vec2, p2: vec2): LineSegment { - const d = vec2.dist(p1, p2); - const v = vec2.sub(vec2.create(), p2, p1); - vec2.scale(v, v, 1 / d); - - return new LineSegment(p1, v, d); - } - - constructor( - p: vec2, - v: vec2, - public readonly l: number, - ) { - super(p, v); - } - - public getP2(out: vec2): vec2 { - return vec2.scaleAndAdd(out, this.p, this.v, this.l); - } - - public containsPoint(p2: vec2): boolean { - const d = this.projectPointDistance(p2); - return (d >= 0 && d <= this.l); - } - - public collide(out: vec2, move: Movement, r: number): boolean { - if (this.distancePoint(move.src) < 0) - return false; - - if (crossz(move.v, this.v) < 0) - return false; - - const t = this.getNormal(vec2.create()); - vec2.scale(t, t, -r); - - const refMove = move.translate(t); - - if (!this.collideRef(out, refMove)) - return false; - - vec2.sub(out, out, t); - return true; - } - - private collideRef(out: vec2, move: Movement): boolean { - if (this.distancePoint(move.dest) >= 0) - return false; - - const x = move.intersectLine(vec2.create(), this); - if (!this.containsPoint(x)) - return false; - - this.projectPoint(out, move.dest); - - return true; - } -} diff --git a/src/math/point.ts b/src/math/point.ts deleted file mode 100644 index 0865b8f..0000000 --- a/src/math/point.ts +++ /dev/null @@ -1,40 +0,0 @@ -import { Collidable } from './collision'; -import { Line, Movement, normal } from './line'; - -import { vec2 } from 'gl-matrix'; - -export class Point implements Collidable { - constructor(public readonly p: vec2) {} - - public collide(out: vec2, move: Movement, r: number): boolean { - const moveLine = move.toLineSegment(); - - if (moveLine.projectPointDistance(this.p) < 0) - return false; - - const d = moveLine.distancePoint(this.p) / r; - if (Math.abs(d) >= 1) - return false; - - const e = Math.sqrt(1 - d * d); - - const t = moveLine.getNormal(vec2.create()); - vec2.scale(t, t, d); - vec2.scaleAndAdd(t, t, moveLine.v, e); - - const tr = vec2.scale(vec2.create(), t, r); - - const refMove = move.translate(tr); - - if (vec2.sqrDist(this.p, move.src) > r * r && !refMove.passes(this.p)) - return false; - - normal(t, t); - - const tang = new Line(this.p, t); - tang.projectPoint(out, refMove.dest); - vec2.sub(out, out, tr); - - return true; - } -} |