I see what you're saying. Once we've rotated towards the target, then it's just a matter of creating the 2D equation that finds the value for theta. Once I have v, then I'll rotate back into world space using phi - and that will be my vector.
Thanks so much for your help!
Glen
I'm a computer programmer, but I'm having trouble with this one. I need help figuring out how to calculate a 3D velocity vector which will make a projectile follow an ARC between two points on the ground, firing with a fixed speed.
I have a cannon at point a (x, y, z)
I have a target on...