3D rotation based on 2 vectors...

Graphics and GPU Programming Programming

Started by Glaiel_Gamer March 12, 2006 09:15 AM

13 comments, last by Glaiel_Gamer 18 years, 1 month ago

100

March 12, 2006 07:52 PM

couldn't you just use gluLookAt to generate the matrix using the two vectors, then apply that matrix to your object? Best way I can think of.

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Glaiel_Gamer

106

Author

March 12, 2006 08:01 PM

Quote:Original post by anist
couldn't you just use gluLookAt to generate the matrix using the two vectors, then apply that matrix to your object? Best way I can think of.

doesnt gluLookAt just change the camera? This is what i'm pretty much trying to do (use gluLookAt for an object) so how do i get the matrix from it?

d00fus

328

March 12, 2006 09:04 PM

That's what I gave in my post. gluLookAt will modify the matrix stack itself. To accomplish what gluLookAt does, use the steps in my post to calculate the matrix.

Glaiel_Gamer

106

Author

March 13, 2006 07:06 AM

oh wait.... so what if i use gluLookAt on the object then pop the matrix stack?

Glaiel_Gamer

106

Author

March 13, 2006 07:20 AM

meh nevermind i solved it in a mock-up way by calling glLoadIdentity in the shape's code

3D rotation based on 2 vectors...

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3D rotation based on 2 vectors...

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