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mdurfee

Applying Camera Transform in D3D

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I''ve been using OpenGL for a while now, but I''ve just started using D3D. I''m used to storing the rotation/translation for my camera in one matrix and multiplying by the inverse of it before rendering. I''ve attempted to do the same in D3D, but I have a few questions...First, does applying the camera transform need to happen between BeginScene and EndScene?...Second, should I be using the DTS_VIEW flag when calling SetTransform (I''m pretty sure I should be, but anytime I translate my camera my scene seems to dissapear -- I''m just rendering a triangle at the origin and translating along the z axis). Any help is appreciated.

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quote:
Original post by mdurfee
...First, does applying the camera transform need to happen between BeginScene and EndScene?...


No it doesn''t have to be applied between Begin/EndScene. In fact, it may not work in between them (not sure on that).


quote:
Original post by mdurfee
...Second, should I be using the DTS_VIEW flag when calling SetTransform (I''m pretty sure I should be, but anytime I translate my camera my scene seems to dissapear -- I''m just rendering a triangle at the origin and translating along the z axis). Any help is appreciated...


Yeah, DTS_VIEW is correct. Are you sure you''ve set up the matrix correctly? OpenGL uses a right-handed coordinate system (positive-z out of the screen), while Direct3D uses a left-handed system (positive-z into the screen).

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thanks for the help henrym. It turns out I wasn''t setting the Projection matrix so the triangle was being clipped out whenever I translated the camera more than one unit...I shoulda thought a that before I posted!

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