Rotate/Translate object in local space

Posted by Mathias Hölzl on Game Development See other posts from Game Development or by Mathias Hölzl
Published on 2012-11-27T15:36:51Z Indexed on 2012/11/27 17:21 UTC
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Filed under:

math

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rotation

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movement

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transformation

I am just trying to create a movementcontroller class for game entities. These class should transform the entity affected by the mouse and keyboard input. I am able to calculate the changed rotation and the new globalPosition. Then I multiply:

 newGlobalMatrix = changedRotationMatrix * oldGlobalMatrix;
 newGlobalMatrix = MatrixSetPosition(newPosition);

The problem is that the object rotates around the global axis and not around the local axis.

I use XNAMath for the matrix calculation.

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