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Spikies
This is also a modification of the second program in this series (Random Pixels x 4).
In this version, instead of drawing a simple block, we draw a spiky shape, using the
curveto() function, which draws quadratic bezier curves.
Here's the code for drawing the spikey shape:
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this.moveTo(0,0);
this.beginFill(this.tint);
var cx = TILE_X/2;
var cy = TILE_Y/2;
this.curveTo(cx,cy,0+TILE_X,0);
this.curveTo(cx,cy,0+TILE_X,0+TILE_Y);
this.curveTo(cx,cy,0,0+TILE_Y);
this.curveTo(cx,cy,0,0);
this.endFill();
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