It's quite difficult to follow what you had changed and the final script. Anyway mvp is recalculated inside paint event, not when F10 is pressed.
On Thu, Feb 13, 2020, 10:22 PM Brian Schott <schott.br...@gmail.com> wrote: > In my attempt to learn opengl I have edited the file shader.ijs . I will > show the following diff at the bottom of this email. > > diff /Users/brian/j901/addons/demos/qtdemo/shader.ijs > /Users/brian/j64-807-user/shaderb.ijs > > I have been assuming that the movement in the shader example is based on > moving the eye instead of moving the cube that is being observed. So the > first issue is whether my assumption is correct. > > The array vectors in the code are stored in the variable named mvp. My code > attempts to translate the mvp by a few steps using gl_Translate when the > function key number 10 (F10) is pressed. But with my current code nothing > seems to happen when I press F10. > > Thanks in advance, > > > server:~ brian$ diff /Users/brian/j901/addons/demos/qtdemo/shader.ijs > /Users/brian/j64-807-user/shaderb.ijs > 7c7 > < STOP=: 1 > --- > > STOP=: 0 > 16c16 > < if. -. checkrequire_qtdemo_ 'gles';'api/gles' do. return. end. > --- > > NB. if. -. checkrequire_qtdemo_ 'gles';'api/gles' do. return. end. > 92c92 > < gl_paint'' > --- > > gl_paint 0 > 116a117,118 > > if. y-:1 do. mvp=: gl_Translate 20 3 0 > > else. > 120a123 > > end. > 163c166,167 > < STOP=: -.STOP > --- > > NB. STOP=: -.STOP > > gl_paint 1 > server:~ brian$ > > -- > (B=) > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
