Bill (et al), Can you comment on my initial assumption that shader.ijs is not really moving the cube but is moving the eye in relation to the cube, (and that a more common way to move **multiple** objects is to move them, not the eye.)
Bill, Replying to your 3 comments: 1)I have stopped the timer. 2)I have alter the paint even so that it receives a y arg. 3)My revision keeps the projection after the gl_Translate. So I think I am doing what you intended. I also tried changing my gl_Translate line as follows but get the same result as before. mvp=: mvp mp~ gl_Translate 20 3 0 Thanks, again, On Thu, Feb 13, 2020 at 10:21 AM bill lam <bbill....@gmail.com> wrote: > I think you should stop the timer so as not to interference your code. > > handler for paint event (and all events) receive no y argument. > > not sure what it looks like if mvp is translate only without projection > from 3D to 2D. the screen is flat 2D. > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
