My fat bresenham implementation is really slow
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a20ad44f75
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@ -967,34 +967,27 @@ function rope:_rast(
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if (y0<y1) sy=1
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local done=false,err
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local queue={}
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if dx>dy then
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err=dx/2.0
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return function()
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if (queue==nil) return
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if (x==x1) queue=nil return x1,y1
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if #queue==0 then
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add(queue,{x,y})
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err-=dy
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if (err<0) y+=sy add(queue,{x,y}) err+=dx
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x+=sx
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end
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return unpack(deli(queue,1))
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if (done) return
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if (x==x1) done=true return x1,y1
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local oldx,oldy=x,y
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err-=dy
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if (err<0) y+=sy err+=dx
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x+=sx
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return oldx,oldy
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end
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else
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err=dy/2.0
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return function()
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if (queue==nil) return
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if (y==y1) queue=nil return x1,y1
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if #queue==0 then
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add(queue,{x,y})
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local oldx,oldy=x,y
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err-=dx
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if (err<0) x+=sx add(queue,{x,y}) err+=dy
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y+=sy
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end
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return unpack(deli(queue,1))
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if (done) return
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if (y==y1) done=true return x1,y1
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local oldx,oldy=x,y
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err-=dx
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if (err<0) x+=sx err+=dy
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y+=sy
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return oldx,oldy
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end
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end
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end
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