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authorMatthias Schiffer <mschiffer@universe-factory.net>2019-12-24 13:53:16 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2019-12-24 13:53:16 +0100
commit3c51a1994f41b625823c4f15e92396b5498ce23c (patch)
tree7a96310ec32df82ac87039ea555300bcab510a5e /src/renderer/runtime/math/point.ts
parent33926af829848050c54c698ed22da9fe2b912aea (diff)
downloadrpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.tar
rpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.zip
Move renderer into "runtime" subdirectory
Diffstat (limited to 'src/renderer/runtime/math/point.ts')
-rw-r--r--src/renderer/runtime/math/point.ts40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/renderer/runtime/math/point.ts b/src/renderer/runtime/math/point.ts
new file mode 100644
index 0000000..0865b8f
--- /dev/null
+++ b/src/renderer/runtime/math/point.ts
@@ -0,0 +1,40 @@
+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;
+ }
+}