Created
June 11, 2013 10:41
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Canvas Animation - Ranges
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| Blur.prototype.burn_ = function () { | |
| var time = (new Date()).getTime(); | |
| var width = this.image.width; | |
| var height = this.image.height; | |
| if (!this.lastTime) this.lastTime = time; | |
| //Light up | |
| if (this.dragging) { | |
| var centerX = this.drag.coords.x - this.element_.offsetLeft; | |
| var centerY = this.drag.coords.y - this.element_.offsetTop; | |
| var r = this.config_.tapRadius; | |
| var range = new Range({ | |
| ctx: this.ctx, | |
| time: time, | |
| x: centerX - r + 1, | |
| y: centerY - r + 1, | |
| width: r * 2, | |
| height: r * 2, | |
| flame: this.config_.flame | |
| }); | |
| range.addPoints(this.getAndProcessAffected(centerX, centerY)); | |
| this.ranges.push(range); | |
| } | |
| //Burn | |
| for (var i = 0, l = this.ranges.length; i < l; i++) { | |
| range = this.ranges[i]; | |
| if (!range) break; | |
| var opts = range.options; | |
| var frame = Math.round(range.frames.length * (time - range.start) / opts.flame.life); | |
| var img = range.image(frame); | |
| //range animation is completed -> remove it | |
| if (img === false) { | |
| this.ranges.splice(i, 1); | |
| i--; | |
| } | |
| if (img) { | |
| this.ctx.drawImage(img, opts.x, opts.y); | |
| } | |
| //Spread fire | |
| if (range.spreads[frame]) { | |
| for (var j = 0, k = range.spreads[frame].length; j < k; j++) { | |
| var point = this.fire.generateDirection(range.spreads[frame][j]); | |
| if (point) { | |
| this.fire.addPixel(point); | |
| } | |
| } | |
| } | |
| } | |
| //Keep fire | |
| this.fire.render(time); | |
| this.ctx.drawImage(this.fire.canvas, 0, 0); | |
| this.lastTime = time; | |
| requestAnimationFrame(this.burn_.bind(this), this.element_); | |
| }; |
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