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Phew.. lots of transform matrix math over and I can finally get all 4 points of a Sprite, regardless of rotation, translation or scale of itself or any of its parents.

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Richard Davey
2013-09-01 05:29:53 +01:00
parent 12e5d2aceb
commit 6ef89826df
3 changed files with 14 additions and 18 deletions
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src/gameobjects/Sprite.js
+6 -6
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@@ -158,8 +158,8 @@ Phaser.Sprite.prototype.update = function() {
this._sx = Math.sqrt((this._a00 * this._a00) + (this._a01 * this._a01));
this._sy = Math.sqrt((this._a10 * this._a10) + (this._a11 * this._a11));
this._sw = this.width * this._sx;
this._sh = this.height * this._sy;
this._sw = this.texture.frame.width * this._sx;
this._sh = this.texture.frame.height * this._sy;
this._a01 *= -1;
this._a10 *= -1;
@@ -167,12 +167,12 @@ Phaser.Sprite.prototype.update = function() {
this._id = 1 / (this._a00 * this._a11 + this._a01 * -this._a10);
// Update the edge points
this.offset.setTo(this._a02 - (this.anchor.x * this.width), this._a12 - (this.anchor.y * this.height));
this.offset.setTo(this._a02 - (this.anchor.x * this._sw), this._a12 - (this.anchor.y * this._sh));
this.getLocalPosition(this.topLeft, this.offset.x, this.offset.y);
this.getLocalPosition(this.topRight, this.offset.x + this.width, this.offset.y);
this.getLocalPosition(this.bottomLeft, this.offset.x, this.offset.y + this.height);
this.getLocalPosition(this.bottomRight, this.offset.x + this.width, this.offset.y + this.height);
this.getLocalPosition(this.topRight, this.offset.x + this._sw, this.offset.y);
this.getLocalPosition(this.bottomLeft, this.offset.x, this.offset.y + this._sh);
this.getLocalPosition(this.bottomRight, this.offset.x + this._sw, this.offset.y + this._sh);
// this.checkBounds();