/**
* Given two points p1, p2 and a line passing through a,b check whether p1 and p2 are on the
* same side of the line. In our case a,b are characters and p1, p2 are cameras
*/
public boolean isInSameHalfPlane(PVector p1, PVector p2, PVector a, PVector b) {
PVector copyP1 = new PVector(p1.x, p1.y, p1.z);
PVector copyP2 = new PVector(p2.x, p2.y, p2.z);
PVector copyA = new PVector(a.x, a.y, a.z);
PVector copyB = new PVector(b.x, b.y, b.z);
copyB.sub(copyA);
copyP1.sub(copyA);
copyP2.sub(copyA);
PVector p1a = copyB.cross(copyP1);
PVector p2a = copyB.cross(copyP2);
if (p1a.dot(p2a) > 0) {
return true;
}
return false;
}
