public static bool RayVsPlane(Ray ray, Plane plane, out float outDistance, out Vector3 intersectPoint)
{
bool bIntersect = SegmentVsPlane(ray.Origin, ray.Origin + ray.Direction * float.MaxValue, plane, out outDistance, out intersectPoint);
outDistance *= float.MaxValue;
return bIntersect;
}
public static bool RayVsPlane(Ray ray, Vector3 planeOrigin, Vector3 planeNormal, out float distance, out Vector3 intersectPoint)
{
return RayVsPlane(ray, new Plane(planeOrigin, planeNormal), out distance, out intersectPoint);
}
/*public static bool RayVsAABB(Vector3 p, Vector3 d, Vector3 bboxMin, Vector3 bboxMax, out float tmin, out Vector3 q)
{
tmin = 0f; //Set to -float.MaxValue to get first hit on line.
float tmax = float.MaxValue; //Set to max distance ray can travel (for segment)
//For all three slaps
for (int i = 0; i < 3; i++)
{
if (Math.Abs(d[i]) < float.Epsilon)
{
//Ray is parallel to slab. No hit if origin not within slab.
if (p[i] < bboxMin[i] || p[i] > bboxMax[i])
{
q = Vector3.Zero;
return false;
}
}
else
{
//Compute intersection t value of ray with near and far plane of slab.
float ood = 1.0f/d[i];
float t1 = (bboxMin[i] - p[i])*ood;
float t2 = (bboxMax[i] - p[i])*ood;
//Make t1 be intersection with near plane, t2 with far plane.
if (t1 > t2)
{
float temp = t1;
t1 = t2;
t2 = temp;
}
//Comput intersection of slab intersection intervals
tmin = Math.Max(tmin, t1);
tmax = Math.Min(tmax, t2);
//Exit with no collision as soon as slab intersection becomes empty
if (tmin > tmax)
{
q = Vector3.Zero;
return false;
}
}
}
//Ray intersects all three slabs. Return point q and intersection t value.
q = p + d*tmin;
return true;
}*/
public static bool RayVsPlane(Ray ray, Vector3 planeOrigin, Vector3 planeNormal)
{
float dummy1;
Vector3 dummy2;
return RayVsPlane(ray, planeOrigin, planeNormal, out dummy1, out dummy2);
}
public static bool RayVsPlane(Ray ray, Vector3 planeOrigin, Vector3 planeNormal, out Vector3 intersectPoint)
{
float dummy;
return RayVsPlane(ray, planeOrigin, planeNormal, out dummy, out intersectPoint);
}
public static bool RayVsAABB(Ray ray, Vector3 bMin, Vector3 bMax, out float distance)
{
float dirFracX = 1.0f / ray.Direction.X;
float dirFracY = 1.0f / ray.Direction.Y;
float dirFracZ = 1.0f / ray.Direction.Z;
float t1 = (bMin.X - ray.Origin.X) * dirFracX;
float t2 = (bMax.X - ray.Origin.X) * dirFracX;
float t3 = (bMin.Y - ray.Origin.Y) * dirFracY;
float t4 = (bMax.Y - ray.Origin.Y) * dirFracY;
float t5 = (bMin.Z - ray.Origin.Z) * dirFracZ;
float t6 = (bMax.Z - ray.Origin.Z) * dirFracZ;
float tmin = Math.Max(Math.Max(Math.Min(t1, t2), Math.Min(t3, t4)), Math.Min(t5, t6));
float tmax = Math.Min(Math.Min(Math.Max(t1, t2), Math.Max(t3, t4)), Math.Max(t5, t6));
if (tmax < 0)
{
distance = tmax;
return false;
}
if (tmin > tmax)
{
distance = tmax;
return false;
}
distance = tmin;
return true;
}
