// returns frame at ray-intersection point, with normal pointing *outwards*
public static Frame3f GetCylinderFrameFromAngles(float fHUDRadius, float fHorzAngleDeg, float fVertAngleDeg)
{
Ray3f r = VRUtil.MakeRayFromSphereCenter(fHorzAngleDeg, fVertAngleDeg);
float fRayT = 0.0f;
RayIntersection.InfiniteCylinder(r.Origin, r.Direction, Vector3f.Zero, Vector3f.AxisY, fHUDRadius, out fRayT);
Vector3f v = r.Origin + fRayT * r.Direction;
Vector3f n = new Vector3f(v[0], 0, v[2]).Normalized;
return(new Frame3f(v, n));
}
public static Frame3f GetCylinderFrameFromAngleHeight(float fHUDRadius, float fHorzAngleDeg, float fVertHeight)
{
Ray r = VRUtil.MakeRayFromSphereCenter(fHorzAngleDeg, 0);
r.direction = fHUDRadius * r.direction + fVertHeight * Vector3.up;
r.direction.Normalize();
float fRayT = 0.0f;
RayIntersection.InfiniteCylinder(r.origin, r.direction, Vector3f.Zero, Vector3f.AxisY, fHUDRadius, out fRayT);
Vector3 v = r.origin + fRayT * r.direction;
Vector3 n = new Vector3(v[0], 0, v[2]).normalized;
return(new Frame3f(v, n));
}