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优化圆和矩形碰撞检测

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yhh
2020-06-11 10:06:29 +08:00
parent 2eec9a82f9
commit 53ded30e0b
2 changed files with 7 additions and 37 deletions
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40
source/src/Physics/Collision.ts
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@@ -79,42 +79,12 @@ class Collisions {
}
public static isRectToCircle(rect: Rectangle, cPosition: Vector2, cRadius: number): boolean {
if (this.isRectToPoint(rect.x, rect.y, rect.width, rect.height, cPosition))
return true;
let ew = rect.width * 0.5;
let eh = rect.height * 0.5;
let vx = Math.max(0, Math.max(cPosition.x - rect.x) - ew);
let vy = Math.max(0, Math.max(cPosition.y - rect.y) - eh);
let edgeFrom: Vector2;
let edgeTo: Vector2;
let sector = this.getSector(rect.x, rect.y, rect.width, rect.height, cPosition);
if ((sector & PointSectors.top) != 0) {
edgeFrom = new Vector2(rect.x, rect.y);
edgeTo = new Vector2(rect.x + rect.width, rect.y);
if (this.isCircleToLine(cPosition, cRadius, edgeFrom, edgeTo))
return true;
}
if ((sector & PointSectors.bottom) != 0) {
edgeFrom = new Vector2(rect.x, rect.y + rect.height);
edgeTo = new Vector2(rect.x + rect.width, rect.y + rect.height);
if (this.isCircleToLine(cPosition, cRadius, edgeFrom, edgeTo))
return true;
}
if ((sector & PointSectors.left) != 0) {
edgeFrom = new Vector2(rect.x, rect.y);
edgeTo = new Vector2(rect.x, rect.y + rect.height);
if (this.isCircleToLine(cPosition, cRadius, edgeFrom, edgeTo))
return true;
}
if ((sector & PointSectors.right) != 0) {
edgeFrom = new Vector2(rect.x + rect.width, rect.y);
edgeTo = new Vector2(rect.x + rect.width, rect.y + rect.height);
if (this.isCircleToLine(cPosition, cRadius, edgeFrom, edgeTo))
return true;
}
return false;
return vx * vx + vy * vy < cRadius * cRadius;
}
public static isRectToLine(rect: Rectangle, lineFrom: Vector2, lineTo: Vector2){