- Ryan Hirst
I want to be able to grab the panel, and move it. That means, grab the panel, and P follows. For both ΔDEF and the sheet of paper, I use the method of the previous worksheet: http://www.geogebratube.org/material/show/id/94959. But that won't work for P, which is defined by DynamicCoordinates. So there are three rectangles: 1. the white background (blank image). 2. the colored border (polygon). 3. A polygon with 0 opacity and 0 border, on top. It has the same dimensions, but it moves freely. Its corner point is A (not shown). Now the trick is to make sure that
- when the position of A (x,y coordinates) is changed (the user grabs the panel), both P and P' follow, and
- when P updates, A follows.