private Vector3?GetInterWithNextCircle(int i)
{
if (planeInter[i].type != PlaneSphereIntersection.eType.Circle)
{
return(null);
}
int nextIndex = (i + 1) % 4;
if (planeInter[nextIndex].type != PlaneSphereIntersection.eType.Circle)
{
return(null);
}
PlanePlaneIntersection ppI = new PlanePlaneIntersection(plane[i], plane[nextIndex]);
LineSphereIntersection lsI = new LineSphereIntersection(ppI.O, ppI.D, center, radius);
if (lsI.type == LineSphereIntersection.eType.None)
{
return(null);
}
if (lsI.type == LineSphereIntersection.eType.OnePoint)
{
return(lsI.I0);
}
Vector3 OI0 = (lsI.I0 - camPosition);
Vector3 OI1 = (lsI.I1 - camPosition);
Vector3 camDir = camTransform.forward;
if (Vector3.Dot(camDir, OI0) < 0)
{
if (Vector3.Dot(camDir, OI1) < 0)
{
return(null);
}
return(lsI.I0);
}
else
{
if (Vector3.Dot(camDir, OI1) < 0)
{
return(lsI.I0);
}
}
float d0 = OI0.sqrMagnitude;
float d1 = OI1.sqrMagnitude;
return(d0 > d1 ? lsI.I1 : lsI.I0);
}
private bool GetPointsForCircleIntersection(int index, out Vector3 start, out Vector3 end)
{
PlanePlaneIntersection ppI = new PlanePlaneIntersection(plane[index], backPlane);
LineSphereIntersection lsI = new LineSphereIntersection(ppI.O, ppI.D, center, radius);
if (lsI.type == LineSphereIntersection.eType.None)
{
Debug.LogError("This should not be possible");
start = end = Vector3.zero;
return(false);
}
if (lsI.type == LineSphereIntersection.eType.OnePoint)
{
// just grazing the surface, don't add a segment for that
start = end = Vector3.zero;
return(false);
}
bool b0 = IsInFront(lsI.I0);
bool b1 = IsInFront(lsI.I1);
if (!b0 && !b1)
{
start = end = Vector3.zero;
return(false);
}
int previousIndex = (index + 3) % 4;
if (!b0)
{
if (circleInter[previousIndex].HasValue)
{
start = circleInter[previousIndex].Value;
end = circleInter[index].HasValue ? circleInter[index].Value : lsI.I1;
return(true);
}
if (circleInter[index].HasValue)
{
start = lsI.I1;
end = circleInter[index].Value;
return(true);
}
start = end = Vector3.zero;
return(false);
}
if (!b1)
{
if (circleInter[previousIndex].HasValue)
{
start = circleInter[previousIndex].Value;
end = circleInter[index].HasValue ? circleInter[index].Value : lsI.I0;
return(true);
}
if (circleInter[index].HasValue)
{
start = lsI.I0;
end = circleInter[index].Value;
return(true);
}
start = end = Vector3.zero;
return(false);
}
if (plane[previousIndex].Distance(lsI.I0) < plane[previousIndex].Distance(lsI.I1))
{
start = circleInter[previousIndex].HasValue ? circleInter[previousIndex].Value : lsI.I0;
end = circleInter[index].HasValue ? circleInter[index].Value : lsI.I1;
}
else
{
start = circleInter[previousIndex].HasValue ? circleInter[previousIndex].Value : lsI.I1;
end = circleInter[index].HasValue ? circleInter[index].Value : lsI.I0;
}
return(true);
}
