I have a code in OpenGL which display’s an arrow. I compiled this code into a display list and run it using glCallList() function.
The problem is I need to rotate this arrow, but can’t deal with rotation angles calculations.
I have two points coordinates:
P1(x1, y1, z1) - base of arrow
P2(x1, y2, z2) - arrowhead
How to calculate right rotation angles and what is the sequence of rotations that I should use?
I know that sequence will be something like this:
glTranslatef( center of arrow ); //rotations ... glCallList();
Please help me with this problem.