micro-optimize bullet details
Shots that miss are most likely to not be there yet, so check Y-top first. If I assume shots will never be larger than 16 pixels per side, there is no reason to check the ship's genuine width and height.
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@ -775,7 +775,7 @@ end
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function bullet_base:move()
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local x,y = self.x + self.dx, self.y+self.dy
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self.x,self.y=x,y
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return (y<=128) and (y >= -(self.height<<3)) and (x <= 128) and (x >= -(self.width<<3))
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return (y<=128) and (y >= -16) and (x <= 128) and (x >= -16)
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end
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function bullet_base:draw()
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@ -1351,11 +1351,11 @@ end
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-- box: x1, y1, x2, y2
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function collides(b1, b2)
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return
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b1.x1<=b2.x2
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and b1.y1<=b2.y2
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and b1.x2>=b2.x1
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return
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b1.y1<=b2.y2
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and b1.y2>=b2.y1
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and b1.x1<=b2.x2
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and b1.x2>=b2.x1
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end
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collider = mknew{
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