49 lines
945 B
JavaScript
49 lines
945 B
JavaScript
function Sprite(config){
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var self = this;
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self.config = config;
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// Properties...
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self.x = 0;
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self.y = 0;
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self.pivotX = 0;
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self.pivotY = 0;
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self.scale = null;
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self.scaleX = 1;
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self.scaleY = 1;
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self.rotation = 0; // radians
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// Frames
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self.currentFrame = 0;
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self.totalFrames = config.frames;
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self.nextFrame = function(){
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self.currentFrame = (self.currentFrame+1)%self.totalFrames;
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};
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self.gotoFrame = function(frame){
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self.currentFrame = frame;
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};
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// Draw
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self.draw = function(ctx){
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var sw = config.sw;
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var sh = config.sh;
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var sx = self.currentFrame*sw;
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var sy = 0;
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ctx.save();
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ctx.translate(self.x, self.y);
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ctx.rotate(self.rotation);
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if(self.scale){
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ctx.scale(self.scale, self.scale);
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}else{
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ctx.scale(self.scaleX, self.scaleY);
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}
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ctx.translate(-self.pivotX, -self.pivotY);
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var image = IMAGES[config.img];
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ctx.drawImage(image, sx, sy, sw, sh, 0, 0, sw, sh);
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ctx.restore();
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};
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} |