Rotating a rectangle about a point....

[baconbeastnz]

I want to rotate a rectangle about a point, but I want the bass to stay put while the rest of the block moves..

[Rosario Leonardi]

The bass (http://www.bigtimbercreek.org/fish_lm_bass.jpg)?

If you make a rotation around a point the only point that stand still is the pivot.

You can compute the rotation with a rotation matrix (http://en.wikipedia.org/wiki/Rotation_matrix).

[ZbuffeR]

No, I think he meant the bass (http://www.samsontech.com/products/relatedDocs/Hartke_Bass_Gig_Pack.jpg).

Anyway, a combination of glRotate/glTranslate should do the trick if you are lost in matrices.