Have you read the second paragraph at https://www.khronos.org/registry/OpenGL-Refpages/es2.0/xhtml/glBindBuffer.xml ?
As for your paint issue--you're basically going to need instructions in the paint callback which lays down geometry (or whatever) for your painted surface. Does this make sense? Thanks, -- Raul On Sat, Feb 29, 2020 at 1:03 PM Brian Schott <schott.br...@gmail.com> wrote: > Raul (et al), > > I'm not sure I understand your question/observation. > By freeing up buffers do you mean something like the following (that is, > the 0 there)? > > glBindBuffer GL_ARRAY_BUFFER;0 > > On another note, or perhaps a continuation of your point, please read on. > > In my turtle graphics script I want to create multiple paint operations for > various turtle movements like the following and many more similar verbs > like forward and left which are typed into the "terminal" pane and move or > turn the turtle(s) in the graphics pane. > > forward 20 > left 45 > > To begin to understand how to construct such verbs I have a token verb > named `white` which does nothing yet, but I would like suggestions for > `white`. Am I getting warm here at least ending `white` with gl_paint''? > > white=: 3 : 0 > wh=. gl_qwh'' > glClearColor 1 1 1 1 > gl_sel HD > gl_paint'' > ) > > Thanks, in advance, > > On Sat, Feb 29, 2020 at 10:20 AM Raul Miller <rauldmil...@gmail.com> > wrote: > > > The code I was looking at freed the buffers during initialization (before > > any paint operations). That might work better if there's no additional > > buffers being created, but it's probably not ideal. > > > > Do you have anything like that in your code? > > > > Thanks, > > > > -- > > Raul > > > > -- > (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
