protected override void Initialize()
{
base.Initialize();
var modelName = "sibenik.obj";
var modelPath = Path.GetFullPath(@"..\..\..\..\..\Assets\Models\" + modelName);
OptixContext = new Context();
mTraversal = new TraversalEngine(OptixContext, QueryType.ClosestHit, RayFormat.OriginDirectionInterleaved, TriFormat.Mesh,
TraversalOutput.Normal, InitOptions.None);
mTraversal.SetCpuThreadCount(1);
//mTraversal.NumCpuThreads = Context.CpuNumThreads;
var model = new OptixOBJLoader(modelPath, OptixContext, null, null, n => null);
//OBJLoader normally automatically creates Geometry, GeometryInstances, and GeometryGroups for Optix
//but the Traversal API doesn't use that, so turn that off
model.ParseMaterials = false;
model.ParseNormals = false;
model.GenerateNormals = false;
model.GenerateGeometry = false;
model.LoadContent();
SetCamera(model.BBox);
//we copy the data here or else the GC would clean up a model.Vertices.ToArray() for example
var verts = new Vector3[model.Positions.Count];
var tris = new Int3[model.Groups[0].VIndices.Count];
model.Positions.CopyTo(verts);
model.Groups[0].VIndices.CopyTo(tris);
var indexes = tris.SelectMany(c => new[] { c.X, c.Y, c.Z }).ToArray();
mTraversal.SetMesh(verts, indexes);
int numRays = Width * Height;
var rays = CreateRays();
mTraversal.SetRayData <TraversalEngine.Ray>(rays);
mTraversal.Preprocess();
mDepths = new float[numRays];
mNormals = new Vector3[numRays];
RaysTracedPerFrame = numRays;
Console.WriteLine("Accel data size " + mTraversal.AccelDataSize);
using (var accData = mTraversal.AccelData)
{
var size = accData.Length;
var buffer = new byte[size];
accData.ReadRange(buffer, 0, (int)size);
var nonZeros = buffer.Count(b => b != 0);
Console.WriteLine("Non zeros in acc data " + nonZeros);
}
}
protected override void Initialize()
{
base.Initialize();
var modelName = "sibenik.obj";
var modelPath = Path.GetFullPath(@"..\..\..\..\..\Assets\Models\" + modelName);
mTraversal = new PrimeEngine(RayFormat.OriginDirectionMinMaxInterleaved, RayHitType.Closest);
var model = new OBJLoader(modelPath);
model.ParseMaterials = false;
model.ParseNormals = false;
model.GenerateNormals = false;
model.GenerateGeometry = false;
model.LoadContent();
SetCamera(model.BBox);
var verts = new Vector3[model.Positions.Count];
var tris = new Int3[model.Groups[0].VIndices.Count];
model.Positions.CopyTo(verts);
model.Groups[0].VIndices.CopyTo(tris);
var indexes = tris.SelectMany(c => new[] { c.X, c.Y, c.Z }).ToArray();
mTraversal.SetMesh(verts, indexes);
var numRays = Width * Height;
rays = CreateRays();
mTraversal.SetRays(rays);
mDepths = new float[numRays];
mNormals = new Vector3[numRays];
RaysTracedPerFrame = numRays;
}
private static void IntersectionTest()
{
ICamera Camera;
int Width = 320, Height = 200;
Camera = new Camera();
Camera.Aspect = (float)Width / (float)Height;
Camera.Fov = 30;
Camera.RotationVel = 100.0f;
Camera.TranslationVel = 500.0f;
//sibenik camera position
//Camera.LookAt(new Vector3(-19.5f, -10.3f, .8f), new Vector3(0.0f, -13.3f, .8f), Vector3.UnitY);
PrimeEngine.Ray[] CreateRays()
{
var rays = new PrimeEngine.Ray[Width * Height];
for (int x = 0; x < Width; x++)
{
for (int y = 0; y < Height; y++)
{
Vector2 d = new Vector2(x, y) / new Vector2(Width, Height) * 2.0f - new Vector2(1.0f);
PrimeEngine.Ray ray = new PrimeEngine.Ray
{
origin = Camera.Position,
tmin = 1e-4f,
dir = (d.X * Camera.Right + d.Y * Camera.Up + Camera.Look).NormalizedCopy(),
tmax = 1e34f
};
rays[y * Width + x] = ray;
}
}
return(rays);
}
using (var engine = new PrimeEngine(RayFormat.OriginDirectionMinMaxInterleaved, RayHitType.Closest, RTPBufferType.CudaLinear, false))
{
var modelName = "teapot.obj";
var modelPath = Path.GetFullPath(@"..\..\..\..\Assets\Models\" + modelName);
var model = new OBJLoader(modelPath);
model.ParseMaterials = false;
model.ParseNormals = false;
model.GenerateNormals = false;
model.GenerateGeometry = false;
model.LoadContent();
Camera.CenterOnBoundingBox(model.BBox);
var verts = new Vector3[model.Positions.Count];
var tris = new Int3[model.Groups[0].VIndices.Count];
model.Positions.CopyTo(verts);
model.Groups[0].VIndices.CopyTo(tris);
var indexes = tris.SelectMany(c => new[] { Math.Abs(c.X), Math.Abs(c.Y), Math.Abs(c.Z) }).ToArray();
Console.WriteLine("Setting Mesh");
engine.SetMesh(verts, indexes);
Console.WriteLine("Setting Rays");
engine.SetRays(CreateRays());
Console.WriteLine("Querying Prime");
var hits = engine.Query();
Console.WriteLine($"Successful hits {hits.Count(p => p.t < 1e34f && p.t > 1e-4f)}");
}
}