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phani433

OpenGL problem with viewing entair scene

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hi , i am new to opengl.i just created a cube example for small values it is showing the cube properly but when i gave big values to x &y i am un able to see where it is adding to the scne.i just want to see a perticular area in the scene (0,0,100000,100000) my lower left is 0,0 and upper right is 100000,1000000 that much area i want to see ..some one please tell me is there any function to fix this?

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your cube probably went outside the frustum and since probably faces are backculled you can't see faces from inside the cube. Even without backface culling is probable that you don't see it because if it is too big and totally outside your frustum view there is nothing that will be drawed.

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Try glDisable(GL_CULL_FACE) to enable rendering of both front facing and back facing faces.
Also (0,0,100000,100000) is too much, you will have problems with floating point accuracy, please use smaller values.

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