How can I render one whole teapot in four viewports (each viewport render one part of the teapot) with OpenGL(GLUT)

Question

As stated in the title, I need to render one part of the teapot in each of the four viewports, and the four parts together are a complete teapot. I can now complete the effect in gluOrtho2D. But in gluPerspective, I cannot use gluLookAt to change the observation position.

This is my result Without gluLookAt:

datenwolf · Accepted Answer · 2018-11-29T10:45:53.793

3

Did you by chance try to emplace the rendering in each viewport by trying to transform it there using modelview and projection matrices?

If so, here's a hint: Consider why the function glViewport is called that way and not glWindow (nonexistent). Just use glViewport to define the subset of the window you want to render to.

edited Nov 29 '18 at 10:45

answered Nov 28 '18 at 10:54

datenwolf

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How can I render one whole teapot in four viewports (each viewport render one part of the teapot) with OpenGL(GLUT)

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