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* Implements Oriented Bounding Box raytracing.

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* It's not perfect, but it's good enough. (rarely erroneously returns a backface collision)
* After updating to this revision, rez a prim on another prim and watch it appear where you'd expect it to appear.
This commit is contained in:
Teravus Ovares
2008-03-23 06:24:59 +00:00
parent 5deca3f0c5
commit dc850df50a
3 changed files with 247 additions and 51 deletions
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63
OpenSim/Region/Environment/Scenes/Scene.cs
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@@ -1067,46 +1067,51 @@ namespace OpenSim.Region.Environment.Scenes
if (RayTargetID != LLUUID.Zero)
{
SceneObjectPart target = GetSceneObjectPart(RayTargetID);
LLVector3 direction = LLVector3.Norm(RayEnd - RayStart);
Vector3 AXOrigin = new Vector3(RayStart.X, RayStart.Y, RayStart.Z);
Vector3 AXdirection = new Vector3(direction.X, direction.Y, direction.Z);
if (target != null)
{
pos = target.AbsolutePosition;
//m_log.Info("[OBJECT_REZ]: TargetPos: " + pos.ToString() + ", RayStart: " + RayStart.ToString() + ", RayEnd: " + RayEnd.ToString() + ", Volume: " + Util.GetDistanceTo(RayStart,RayEnd).ToString() + ", mag1: " + Util.GetMagnitude(RayStart).ToString() + ", mag2: " + Util.GetMagnitude(RayEnd).ToString());
//target.Scale.X
if (Math.Abs(target.Scale.X - target.Scale.Y) > 4.5f
|| Math.Abs(target.Scale.Y - target.Scale.Z) > 4.5f
|| Math.Abs(target.Scale.Z - target.Scale.X) > 4.5f)
{
// for now lets use the old method here as the new method works by using the largest scale vector
// component as the radius of a sphere and produces wide results if there's a huge difference
// between the x/y/z vector components
// TODO: Raytrace better here
//EntityIntersection ei = m_innerScene.GetClosestIntersectingPrim(new Ray(AXOrigin, AXdirection));
Ray NewRay = new Ray(AXOrigin, AXdirection);
// If one scale component is less then .21m, it's likely being used as a thin block and therefore
// the raytracing would produce a wide result.
}
else
// Ray Trace against target here
EntityIntersection ei = target.TestIntersectionOBB(NewRay, new Quaternion(1,0,0,0));
// Un-comment out the following line to Get Raytrace results printed to the console.
//m_log.Info("[RAYTRACERESULTS]: Hit:" + ei.HitTF.ToString() + " Point: " + ei.ipoint.ToString() + " Normal: " + ei.normal.ToString());
// If we hit something
if (ei.HitTF)
{
// TODO: Raytrace better here
LLVector3 direction = LLVector3.Norm(RayEnd - RayStart);
Vector3 AXOrigin = new Vector3(RayStart.X, RayStart.Y, RayStart.Z);
Vector3 AXdirection = new Vector3(direction.X, direction.Y, direction.Z);
EntityIntersection ei = m_innerScene.GetClosestIntersectingPrim(new Ray(AXOrigin, AXdirection));
//m_log.Info("[RAYTRACERESULTS]: Hit:" + ei.HitTF.ToString() + " Point: " + ei.ipoint.ToString() + " Normal: " + ei.normal.ToString());
// Set the position to the intersection point
pos = new LLVector3(ei.ipoint.x, ei.ipoint.y, ei.ipoint.z);
}
if (ei.HitTF)
{
pos = new LLVector3(ei.ipoint.x, ei.ipoint.y, ei.ipoint.z);
}
}
return pos;
}
else
{
// fall back to our stupid functionality
pos = RayEnd;
// We don't have a target here, so we're going to raytrace all the objects in the scene.
EntityIntersection ei = m_innerScene.GetClosestIntersectingPrim(new Ray(AXOrigin, AXdirection));
// Un-comment the following line to print the raytrace results to the console.
//m_log.Info("[RAYTRACERESULTS]: Hit:" + ei.HitTF.ToString() + " Point: " + ei.ipoint.ToString() + " Normal: " + ei.normal.ToString());
if (ei.HitTF)
{
pos = new LLVector3(ei.ipoint.x, ei.ipoint.y, ei.ipoint.z);
}
return pos;
}
}