Hi！I recently try to simulate radio wave propagation by optix. Now, I have a point as transmitter and some target end points in buildings.After i launch optixtrace, I got some Intersection information, but I found some wrong infomation like this.

```
these points i set:
OriginPoint (x = 669105.875000 y = 3540470.000000 z = 29.000000)
TargetPoint (x = 669310.250000 y = 3541398.750000 z = 22.500000)
-------------------
the first trajectory：
OriginPoint: x = 669105.875000 y = 3540470.000000 z = 29.000000
Intersection : x = 669310.250000 y = 3541398.750000 z = 22.500294
RayDirection: x = 0.214907 y = 0.976611 z = -0.006835
Normal: x = 0.037557 y = -0.999294 z = 0.000000
ReflectionRayDirection: x = 0.287607 y = -0.957724 z = -0.006835
Distance = 950.993138
the second trajectory：
OriginPoint: x = 669310.250000 y = 3541398.750000 z = 22.500294
Intersection: x = 669310.250000 y = 3541398.750000 z = 22.500000
RayDirection: x = 0.287607 y = -0.957724 z = -0.006835
Normal: x = 0.037557 y = -0.999294 z = 0.000000
ReflectionRayDirection: x = 0.214907 y = 0.976610 z = -0.006835
Distance = 0.000294
the third trajectory：
OriginPoint: x = 669310.250000 y = 3541398.750000 z = 22.500000
Intersection : x = 669313.562500 y = 3541413.750000 z = 22.395020
RayDirection: x = 0.214907 y = 0.976610 z = -0.006835
Normal: x = 0.000000 y = -1.000000 z = -0.000000
ReflectionRayDirection: x = 0.214907 y = -0.976610 z = -0.006835
Distance = 15.361760
```

From this information, the first the first trajectory may be correct, but i have no idea how i got the second trajectory.

And by the way, if i try to simulate diffraction, where i can get some examples?

I am a beginner in optix and hope your help.

Thanks！