diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js index 1dd64f6..a7fe393 100644 --- a/src/pixi/extras/Strip.js +++ b/src/pixi/extras/Strip.js @@ -400,6 +400,63 @@ }; /** + * Returns the bounds of the mesh as a rectangle. The bounds calculation takes the worldTransform into account. + * + * @method getBounds + * @param matrix {Matrix} the transformation matrix of the sprite + * @return {Rectangle} the framing rectangle + */ +PIXI.Strip.prototype.getBounds = function(matrix) +{ + var worldTransform = matrix || this.worldTransform ; + + var a = worldTransform.a; + var b = worldTransform.b; + var c = worldTransform.c; + var d = worldTransform.d; + var tx = worldTransform.tx; + var ty = worldTransform.ty; + + var maxX = -Infinity; + var maxY = -Infinity; + + var minX = Infinity; + var minY = Infinity; + + var vertices = this.vertices; + for (var i = 0, n = vertices.length; i < n; i += 2) + { + var rawX = vertices[i], rawY = vertices[i + 1]; + var x = (a * rawX) + (c * rawY) + tx; + var y = (d * rawY) + (b * rawX) + ty; + + minX = x < minX ? x : minX; + minY = y < minY ? y : minY; + + maxX = x > maxX ? x : maxX; + maxY = y > maxY ? y : maxY; + } + + if (minX === -Infinity || maxY === Infinity) + { + return PIXI.EmptyRectangle; + } + + var bounds = this._bounds; + + bounds.x = minX; + bounds.width = maxX - minX; + + bounds.y = minY; + bounds.height = maxY - minY; + + // store a reference so that if this function gets called again in the render cycle we do not have to recalculate + this._currentBounds = bounds; + + return bounds; +}; + +/** * Different drawing buffer modes supported * * @property