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                            ## Canvas徑向漸變

~~~
var radialGradient = ctx.createRadialGradient(400, 150, 0, 400, 150, 100);
radialGradient.addColorStop(0, "rgb(255, 0, 0)");
radialGradient.addColorStop(1, "rgb(0, 0, 255)");
ctx.fillStyle = radialGradient;
ctx.arc(400, 150, 100, 0, Math.PI *2 , true);
ctx.fill();
~~~

> createRadialGradient(圓心x坐標，圓心的y坐標，圓的半徑，圓心x坐標，圓心的y坐標，圓的半徑)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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