Qauternion Translation

Started by jwblair August 20, 2002 11:09 AM

3 comments, last by jwblair 22 years, 6 months ago

Author

122

August 20, 2002 11:09 AM

Does anyone know how to do or direct me to a site about quaternion translation? I am some what new to quaternions. I have my scaling and rotation calculations done, but I am haveing trouble doing translations for quaternions. Can anyone help? Thanks!

Thanks!John William Blair "The path of the righteous man is beset on all sides by the inequities of the selfish and the tyranny of evil men. Blessed is he who, in the name of charity and good will, shepherds the weak through the valley of the darkness. For he is truly his brother's keeper and the finder of lost children. And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my brothers. And you will know my name is the Lord when I lay my vengeance upon thee."
http://members.home.com/chucklez/wtc/index.html

Josh Horton

122

August 20, 2002 04:41 PM

According to a book about quaternion rotations that I have, there is no known way to use quaternions for translations. Sorry, but you''ll have to use separate variables or matrices for translation.

jwblair

Author

122

August 20, 2002 10:50 PM

What?

Ok... Why cant you do translations with quaternions? Well I guess I will just have to keep looking...

Thanks anayway...

dede

132

August 21, 2002 01:08 AM

Quaternians are for Rotation, basically, quaternians follow the formula

QpQ-1

where Q is the Quaternian

p is the point your are rotating

Q-1 is the inverse Quaternian...

OpenGL isn''t really set up for Quaternian rotations, so usually people who use them either do the rotation in software before rendering it, or translate the quaternian to an axis angle matrix...

~~~~~Screaming Statue Software. | OpenGL FontLibWhy does Data talk to the computer? Surely he's Wi-Fi enabled... - phaseburn

davepermen

1,047

August 21, 2002 02:51 AM

dede, if you use a quaternion, you normally don''t send the matrix, but use it directly for glRotatef..

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Qauternion Translation

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Qauternion Translation

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