Jump to content
  • Advertisement
Sign in to follow this  

rotation problem??

This topic is 4339 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi guys! I developed a mesh class with rotateX() , rotateY(),rotateZ() methods! In what is the order of rotation in glRotatef(angle,x,y,z) ? first X,Y then Z??? thanks

Share this post


Link to post
Share on other sites
Advertisement
OpenGL's glRotatef(angle,x,y,z) rotates around an axis given as [x,y,z], and the angle specifies just the angle.

So, if you want to rotate e.g. around Y,X,Z axes then you have to invoke glRotatef 3 times, like so
glRotatef(gamma,0,0,1); // rotate by gamma around Z
glRotatef(beta,1,0,0); // rotate by beta around X
glRotatef(alpha,0,1,0); // rotate by alpha around Y

But notice that the actual axis you may want to rotate around may change with the co-ordinate system working in. E.g. it makes a difference whether you rotate around the global axes or local axes.

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

Participate in the game development conversation and more when you create an account on GameDev.net!

Sign me up!