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updating the camera

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Hi guys! ok i met this annoying problem of bridging local and world space camera coordinate system with a yaw-pitch rotational matrix. I am using the standard code provided by DXSDK. Everything works fine when the camera is looking in the positive z direction. Now what I am trying to do is to load some variables from a script that also specifies the actual world lookat direction and other variables. How do I make use of the loaded values and modify the existing codebase such that it takes into account the unmodified local coordinate system and the loaded values?
//Make a rotation matrix based on the camera's yaw & pitch
D3DXMATRIX mCameraRot;
//Transform vectors based on camera's rotation matrix

thx! Edwin

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