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Richard Davey
2013-09-01 05:22:08 +01:00
parent 801c2af9d4
commit 12e5d2aceb
3 changed files with 104 additions and 18 deletions
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src/gameobjects/Sprite.js
+29 -15
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@@ -122,6 +122,10 @@ Phaser.Sprite = function (game, x, y, key, frame) {
this._a11 = 0;
this._a12 = 0;
this._id = 0;
this._sx = 0;
this._sy = 0;
this._sw = 0;
this._sh = 0;
};
@@ -140,8 +144,30 @@ Phaser.Sprite.prototype.update = function() {
this.position.x = this._x - (this.game.world.camera.x * this.scrollFactor.x);
this.position.y = this._y - (this.game.world.camera.y * this.scrollFactor.y);
// |a c tx|
// |b d ty|
// |0 0 1|
// Cache our transform values
this._a00 = this.worldTransform[0]; // scaleX a
this._a01 = this.worldTransform[1]; // skewY c
this._a02 = this.worldTransform[2]; // translateX tx
this._a10 = this.worldTransform[3]; // skewX b
this._a11 = this.worldTransform[4]; // scaleY d
this._a12 = this.worldTransform[5]; // translateY ty
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._a01 *= -1;
this._a10 *= -1;
this._id = 1 / (this._a00 * this._a11 + this._a01 * -this._a10);
// Update the edge points
this.offset.setTo(this._x - (this.anchor.x * this.width), this._y - (this.anchor.y * this.height));
this.offset.setTo(this._a02 - (this.anchor.x * this.width), this._a12 - (this.anchor.y * this.height));
this.getLocalPosition(this.topLeft, this.offset.x, this.offset.y);
this.getLocalPosition(this.topRight, this.offset.x + this.width, this.offset.y);
@@ -154,20 +180,8 @@ Phaser.Sprite.prototype.update = function() {
Phaser.Sprite.prototype.getLocalPosition = function(p, x, y) {
this._a00 = this.worldTransform[0]; // scaleX
this._a01 = this.worldTransform[1]; // skewY
this._a02 = this.worldTransform[2]; // translateX
this._a10 = this.worldTransform[3]; // skewX
this._a11 = this.worldTransform[4]; // scaleY
this._a12 = this.worldTransform[5]; // translateY
this._a01 *= -1;
this._a10 *= -1;
this._id = 1 / (this._a00 * this._a11 + this._a01 * -this._a10);
p.x = ((this._a11 * this._id * x + -this._a01 * this._id * y + (this._a12 * this._a01 - this._a02 * this._a11) * this._id) * this.scale.x) + this.x;
p.y = ((this._a00 * this._id * y + -this._a10 * this._id * x + (-this._a12 * this._a00 + this._a02 * this._a10) * this._id) * this.scale.y) + this.y;
p.x = ((this._a11 * this._id * x + -this._a01 * this._id * y + (this._a12 * this._a01 - this._a02 * this._a11) * this._id) * this._sx) + this._a02;
p.y = ((this._a00 * this._id * y + -this._a10 * this._id * x + (-this._a12 * this._a00 + this._a02 * this._a10) * this._id) * this._sy) + this._a12;
return p;