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Rotation in XNA

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3 replies to this topic

#1Aryprogrammer  Members

Posted 29 June 2012 - 04:33 AM

Hi guys,
How can I Rotate my vertices around a point (a custom pivot point)? is there any method to do this?

#2Tordin  Members

Posted 29 June 2012 - 05:52 AM

If you refer to rotating around a arbitrary axis, you could just multiply your vertexs world matrix with the points world matrix.
then it becomes more of a local matrix.

http://en.wikipedia.org/wiki/Transformation_matrix

but if you can, try to explain the situation and abit more about your problem,
"There will be major features. none to be thought of yet"

#3Aryprogrammer  Members

Posted 01 July 2012 - 01:09 PM

I mean a local rotation

#4anonymous22  Members

Posted 02 July 2012 - 10:07 AM

Please specify whether you are talking about 2 or 3 dimensions, rotation around a point can be performed only in 2D, rotation in 3D is done around an axis.
You can not rotate around a point in 3D because there are infinite directions around it to represent axes.

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