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Improve translate() calls by directly calling Point objects and thus not relying on Point.read() internally.

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This commit is contained in:
Jürg Lehni 2011-02-15 22:53:05 +00:00
parent 27f291ec80
commit f0d4374dc4
1 changed files with 4 additions and 8 deletions
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12
src/basic/Matrix.js
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@ -91,16 +91,14 @@ var Matrix = Base.extend({
// Check arguments.length and typeof arguments[1], if object, assume
// scale
center = Point.read(arguments, 2);
// TODO: Optimise calls to translate to not rely on point conversion
// use private translate function instead.
if (center)
this.translate(center.x, center.y);
this.translate(center);
this._m00 *= sx;
this._m10 *= sx;
this._m01 *= sy;
this._m11 *= sy;
if (center)
this.translate(-center.x, -center.y);
this.translate(center.negate());
return this;
},
@ -145,10 +143,8 @@ var Matrix = Base.extend({
*/
shear: function(shx, shy, center) {
center = Point.read(arguments, 2);
// TODO: Optimise calls to translate to not rely on point conversion
// use private translate function instead.
if (center)
this.translate(center.x, center.y);
this.translate(center);
var m00 = this._m00;
var m10 = this._m10;
this._m00 += shy * this._m01;
@ -156,7 +152,7 @@ var Matrix = Base.extend({
this._m01 += shx * m00;
this._m11 += shx * m10;
if (center)
this.translate(-center.x, -center.y);
this.translate(center.negate());
return this;
},