For an experiment I tried this script where I create a stipple to create a 10x10 grid on the canvas. And then I draw a rectangle from 10,10 to 200,200. If I use InvertYAxis transformation function my y1 and y2 transform to 387 and 197 (Why does it transform to this? I thought it would be height-y-1?) and I get the following:
[image: image.png] If I use the transformation: height - y -2 then the rectangle aligns perfectly as shown below: [image: image.png] But I don't understand why doesn't height-y-1 align with it.It seems the stipple starts 1 pixel higher?? Milind On Tue, Dec 17, 2019 at 2:07 PM Milind Gupta <milind.gu...@gmail.com> wrote: > Hi, > I want to create a stipple for a fill on the entire canvas in a > way so that I see a grid on the canvas. I want this stipple to be placed on > the canvas in a particular alignment so that the grid points match certain > coordinates. So is there a way to figure out how the stipple is placed on > the canvas so that we know at what coordinate (and its multiples) a 1 on > the stipple ends up on? > > Thanks, > Milind >
stipple.lua
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