static PixImage RenderSimple(Scene scene, int width, int height, Trafo3d view, Trafo3d proj, Dictionary <uint, EmbreeIndexedGeometry> geos)
{
var img = new PixImage <byte>(width, height, 4);
var mtx = img.GetMatrix <C4b>();
var viewProj = view * proj;
var invViewProj = viewProj.Backward;
RTCFilterFunction filter = null;
//unsafe
//{
// filter = new RTCFilterFunction(ptr =>
// {
// //((uint*)ptr->valid)[0] = 0;
// });
//}
for (int i = 0; i < 20; i++)
{
var sw = Stopwatch.StartNew();
Parallel.For(0, height, new ParallelOptions(), y =>
{
for (int x = 0; x < width; x++)
{
var uv = (new V2d(x, y) + 0.5) / new V2d(width, height);
var ray = GetCameraRay(uv, invViewProj);
var color = GetColor(scene, ray, geos, filter);
mtx[x, y] = color;
}
});
var rayCount = width * height;
var raysPerSecond = rayCount / sw.Elapsed.TotalSeconds / 1e6;
Report.Line("{0:0.00}MRay/s", raysPerSecond);
}
return(img);
}
public bool Occluded(V3f rayOrigin, V3f rayDirection, float minT = 0.0f, float maxT = float.MaxValue, RTCFilterFunction filter = null)
{
// NOTE: rtcInitIntersectContext is an inline method -> do manually
var ctx = new RTCIntersectContext()
{
instID = unchecked ((uint)-1),
filter = filter != null?Marshal.GetFunctionPointerForDelegate(filter) : IntPtr.Zero,
};
var rtRay = new RTCRay()
{
org = rayOrigin,
dir = rayDirection,
tnear = minT,
tfar = maxT,
flags = 0, // must be initialized with 0
time = 0,
mask = 0,
id = 0,
};
unsafe
{
var ctxPtr = &ctx;
var rayPtr = &rtRay;
EmbreeAPI.rtcOccluded1(Handle, ctxPtr, rayPtr);
}
// tfar set to -inf if intersection is found
return(rtRay.tfar == float.NegativeInfinity);
}
public bool Intersect(V3f rayOrigin, V3f rayDirection, ref RayHit hit, float minT = 0.0f, float maxT = float.MaxValue, RTCFilterFunction filter = null)
{
// NOTE: rtcInitIntersectContext is an inline method -> do manually
var ctx = new RTCIntersectContext()
{
instID = unchecked ((uint)-1), // need to be initialized with RTC_INVALID_GEOMETRY_ID
filter = filter != null?Marshal.GetFunctionPointerForDelegate(filter) : IntPtr.Zero,
};
var rayHit = new RTCRayHit()
{
ray = new RTCRay()
{
org = rayOrigin,
dir = rayDirection,
tnear = minT,
tfar = maxT,
flags = 0, // must be initialized with 0
time = 0,
mask = 0,
id = 0,
},
hit = new RTCHit()
{
geomID = unchecked ((uint)-1), // must be initialized to RTC_INVALID_GEOMETRY_ID
}
};
unsafe
{
var ctxPt = &ctx;
var rayHitPt = &rayHit;
EmbreeAPI.rtcIntersect1(Handle, ctxPt, rayHitPt);
}
if (rayHit.hit.geomID != unchecked ((uint)-1))
{
hit.T = rayHit.ray.tfar;
hit.Coord = rayHit.hit.uv;
hit.Normal = rayHit.hit.Ng;
hit.PrimitiveId = rayHit.hit.primID;
hit.GeometryId = rayHit.hit.geomID;
hit.InstanceId = rayHit.hit.instID;
return(true);
}
return(false);
}
static C4b GetColor(Scene scene, Ray3d ray, Dictionary <uint, EmbreeIndexedGeometry> geos, RTCFilterFunction filter = null)
{
var hit = new RayHit();
if (scene.Intersect((V3f)ray.Origin, (V3f)ray.Direction, ref hit, 0, float.MaxValue, filter))
{
if (geos.TryGetValue(hit.GeometryId, out var geo))
{
var ca = (C4b[])geo.IndexedGeometry.IndexedAttributes[DefaultSemantic.Colors];
return(ca[0]);
}
}
return(C4b.Black);
}
