Rotating object | GameDev.net

Original Post

Mar 15, 2003 at 2:56 PM

How do I go about rotating an object in world space to match my camera axis? What I'm doing is firing a rocket down my camera's look axis. That part I've been able to do. The problem is, my rocket models orientation doesn't match the direction that I'm firing. [edited by - Getty on March 15, 2003 4:02:26 PM]

Pipo DeClown

156

Pipo DeClown

Mar 15, 2003 at 3:06 PM

Billboarding? I mean something in the same direction as billboarding, but ofcourse with the 3D object.

.lick

3dModelMan

Mar 15, 2003 at 4:59 PM

Use the inverse view matrix as your rockets initial matrix then move the rocket along it''s Z axis with respect to time;

matRocket._41 += matRocket._31 * fTime * fSpeed;
matRocket._42 += matRocket._32 * fTime * fSpeed;
matRocket._43 += matRocket._33 * fTime * fSpeed;

Getty

Author

Getty

Mar 15, 2003 at 5:00 PM

Thanks for pointing me in the right direction. I used techniqe very similar to billboarding to get it to work.

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