/// <summary>
/// Performs an occlusion query on this scene.
/// </summary>
/// <param name="ray">The ray structure to use.</param>
/// <param name="activityMask">The ray activity mask.</param>
public unsafe void Occlusion4 <T>(RayStruct4 *ray, uint *activityMask)
{
#if DEBUG
CheckDisposed();
if (!AlgorithmFlags.HasFlag(AlgorithmFlags.Intersect4))
{
throw new InvalidOperationException("AlgorithmFlags.Intersect4 not set.");
}
#endif
RTC.Occluded4(activityMask, NativePtr, ray);
}
/// <summary>
/// Performs an occlusion test against a packet of 4 rays.
/// </summary>
public unsafe Boolean[] Occludes4 <Ray>(Ray[] rays, float near = 0, float far = float.PositiveInfinity, float time = 0) where Ray : IEmbreeRay
{
#if DEBUG
if (!traversalFlags.HasFlag(TraversalFlags.Packet4))
{
throw new InvalidOperationException("Traversal flags forbid 4-ray packet traversal");
}
#endif
var p = RTC.RayInterop.Packet4;
var a = RTC.RayInterop.Activity;
for (var t = 0; t < 4; ++t)
{
if (rays[t] != null)
{
a[t] = RTC.RayInterop.Active;
}
else
{
a[t] = RTC.RayInterop.Inactive;
continue;
}
var o = rays[t].Origin;
var d = rays[t].Direction;
p->orgX[t] = o.X; p->orgY[t] = o.Y; p->orgZ[t] = o.Z;
p->dirX[t] = d.X; p->dirY[t] = d.Y; p->dirZ[t] = d.Z;
p->geomID[t] = RTC.InvalidGeometryID;
p->primID[t] = RTC.InvalidGeometryID;
p->instID[t] = RTC.InvalidGeometryID;
p->time[t] = time;
p->tnear[t] = near;
p->tfar[t] = far;
}
RTC.Occluded4(a, scenePtr, p);
return(new[]
{
p->geomID[0] == 0, p->geomID[1] == 0,
p->geomID[2] == 0, p->geomID[3] == 0,
});
}
