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USMike Deaton
 

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  1. USMike Deaton
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    1. POOpenGL switching between ortho and perspective
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    1. This table or related slice is empty.
    1. COThank you Andon, and everyone else who answered. I had the Y-axis reversed in glFrustum() by mistake. Thank you for pointing that out. I am not calling initGL() more than once. I did double check all my code and found 2 places where I had glEnd() and glPopMatrix() reversed by mistake. In regards to point 3: I was able to get the cube to draw on top of the tiles by using glFrustum(0,SCREEN_WIDTH,SCREEN_HEIGHT,0, -1,1); in set3d() and glOrtho(0,SCREEN_WIDTH,SCREEN_HEIGHT,0,-1,1); in set2d(); so apparently you can have the zNear set to <0 in glFrustum. Probably not right, but it works for now.
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      1. USMike Deaton
    2. COThank you Trillian, I removed the pushmatrix() calls from my initGL() function. I will try glGetError() momentarily. Thank you Andon, I changed set3d() to use glFrustum(0,SCREEN_WIDTH,SCREEN_HEIGHT,0, 1.0F,3.0F);.
      singulars
      1. POOpenGL switching between ortho and perspective
      1. USMike Deaton
    3. COYour answer makes sense Pavel, but the cube doesn't draw at all if I change the zNear value of the glFrustrum call. First I tried 0.1 then I went all the way to 0.00000001 and it won't draw. I changed the zFar to 3. I also commented out the set2d() so there is nothing else drawing on top of the cube just to be sure, and it draws fine if the zNear is 0, but if I change it I get nothing. I'm using a standard cube example. I tried a couple of examples. They both work at zNear 0, and don't work at anything else. Any ideas?
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      1. POOpenGL switching between ortho and perspective
      1. USMike Deaton
 

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