### Sweep of a solid angle

Posted:

**Mon Feb 22, 2016 6:18 pm**Hello All

I'm stuck with a problem that basically boils down to analytically computing the total sweep of the solid angle subtended at a point. Assume that there is a quad that moves along a direction vector say u, and for each position on the direction u, I would like to compute the solid angle subtended by the quad at a fixed point. Can someone point out if there are any existing methods or possible locations for where I can find a solution?

I'm stuck with a problem that basically boils down to analytically computing the total sweep of the solid angle subtended at a point. Assume that there is a quad that moves along a direction vector say u, and for each position on the direction u, I would like to compute the solid angle subtended by the quad at a fixed point. Can someone point out if there are any existing methods or possible locations for where I can find a solution?