I’m trying to divide a window into for viewports but am unsure how. It looks good until something happens that causes a reshape. Each viewport image then takes on the colors of the last one. any suggestions?
glClear is not affected by glViewport (the viewport is just a matrix scale).
Enable GL_SCISSOR_TEST and use glScissor to restrict drawing to the individual viewports.
Originally posted by Relic:
glClear is not affected by glViewport (the viewport is just a matrix scale).
Enable GL_SCISSOR_TEST and use glScissor to restrict drawing to the individual viewports.
This doesnt work. It makes it so I can only draw one thing. I need to be able to reshape correctly. the shapes are fine, but the colors are messed up. any other sugg.?
Not without the basic code steps you use to initialize and render the different viewports and the part which goes wrong.
I assumed your last viewport’s background color bleeded onto the other viewports.
What do you mean you can only draw one thing?
Don’t you do something like this?
glEnable(GL_SCISSOR_TEST);
for each view
{
glViewport;
glScissor;
glClear; // Here or only once outside the loop before the enable scissor if the clear color is the same for all views.
setup matrices;
draw complete scene;
}