Make physics more fun

backend/src/physics/move-circle.ts

@@ -1,68 +0,0 @@
-import { vec2 } from 'gl-matrix';
-import { Circle, rotate90Deg } from 'shared';
-import { CirclePhysical } from '../objects/circle-physical';
-import { DynamicPhysical } from './containers/dynamic-physical';
-import { Physical } from './physical';
-
-export const moveCircle = (
-  circle: CirclePhysical,
-  delta: vec2,
-  possibleIntersectors: Array<Physical>,
-): {
-  realDelta: vec2;
-  hitSurface: boolean;
-  normal?: vec2;
-  tangent?: vec2;
-} => {
-  const nextCircle = new Circle(vec2.clone(circle.center), circle.radius);
-  vec2.add(nextCircle.center, nextCircle.center, delta);
-
-  possibleIntersectors = possibleIntersectors.filter(
-    (b) => b.gameObject !== circle.gameObject && b.canCollide,
-  );
-
-  const getSdfAtPoint = (point: vec2): number => {
-    return possibleIntersectors
-      .filter((i) => i.canCollide)
-      .reduce((min, i) => (min = Math.min(min, i.distance(point))), 1000);
-  };
-
-  const sdfAtCenter = getSdfAtPoint(nextCircle.center);
-
-  if (sdfAtCenter > nextCircle.radius) {
-    circle.center = vec2.add(circle.center, circle.center, delta);
-
-    return {
-      realDelta: delta,
-      hitSurface: false,
-    };
-  }
-
-  const intersecting = possibleIntersectors
-    .filter((i) => i.canCollide && i.canMove)
-    .find((i) => i.distance(nextCircle.center) < circle.radius);
-
-  (intersecting?.gameObject as DynamicPhysical)?.onCollision(circle.gameObject);
-  ((circle.gameObject as unknown) as DynamicPhysical).onCollision(
-    intersecting?.gameObject,
-  );
-
-  const dx =
-    getSdfAtPoint(vec2.add(vec2.create(), nextCircle.center, vec2.fromValues(1, 0))) -
-    sdfAtCenter;
-  const dy =
-    getSdfAtPoint(vec2.add(vec2.create(), nextCircle.center, vec2.fromValues(0, 1))) -
-    sdfAtCenter;
-  const normal = vec2.fromValues(dx, dy);
-  vec2.normalize(normal, normal);
-  const rotatedNormal = rotate90Deg(normal);
-  return {
-    realDelta: delta,
-    hitSurface: true,
-    normal,
-    tangent:
-      vec2.dot(rotatedNormal, delta) < 0
-        ? vec2.scale(rotatedNormal, rotatedNormal, -1)
-        : rotatedNormal,
-  };
-};