public GpuLBVHNode[] BuildTDData(out TriangleDataInfo[] sortedTris)
{
var helper = new TopDownBvhAccell();
helper.Init(scene, null);
sortedTris = helper.triangles;
return helper.GetData().ToArray();
}
public LNode[] BuildLData(out TriangleDataInfo[] sortedTris)
{
var helper =
new
LinearBvhAccelleration();
//BottomUpBvhAccelleration();
helper.Init(scene, null);
sortedTris = helper.triangles;
return helper.GetData().ToArray();
}
public TriangleMesh(GeometryInfo geoInfo)
{
MeshProfile = new SurfaceProfile();
MaterialName = geoInfo.MaterialName;
MeshName = geoInfo.Name;
Vertices = geoInfo.VertexData.ToPointList().ToArray();
Normals = geoInfo.NormalData.ToNormalList().ToArray();
TexCoords = geoInfo.TextureData.TodVectorList().ToArray();
var triangles = new List<TriangleDataInfo>();
int index = 0;
if (geoInfo.IndexData.Any())
{
int[] ni = null;
int[] ti = null;
var hasNormals = geoInfo.NormalIndexData != null && geoInfo.NormalIndexData.Any();
var hasTexCoords = geoInfo.TextureIndexData != null && geoInfo.TextureIndexData.Any();
if (hasTexCoords)
{
ti = geoInfo.TextureIndexData.ToArray();
}
if (hasNormals)
{
ni = geoInfo.NormalIndexData.ToArray();
}
HasNormals = hasNormals;
HasTexCoords = hasTexCoords;
for (int i = 0; i < geoInfo.IndexData.Count; i += 3)
{
index++;
var newTriangle = new TriangleDataInfo()
{
v0 = new MeshVertexInfo()
{
NormalIndex = hasNormals ? ni[i] - 1 : -1,
VertexIndex = geoInfo.IndexData[i] - delta,
TexCoordIndex = hasTexCoords ? ti[i] - 1 : -1
},
v1 = new MeshVertexInfo()
{
NormalIndex = hasNormals ? ni[i + 1] - 1 : -1,
VertexIndex = geoInfo.IndexData[i + 1] - delta,
TexCoordIndex = hasTexCoords ? ti[i + 1] - 1 : -1
},
v2 = new MeshVertexInfo()
{
NormalIndex = hasNormals ? ni[i + 2] - 1 : -1,
VertexIndex = geoInfo.IndexData[i + 2] - delta,
TexCoordIndex = hasTexCoords ? ti[i + 2] - 1 : -1
},
};
triangles.Add(newTriangle);
}
WorldBound = new AABB(this.Vertices);
this.Triangles = triangles.ToArray();
this.BottomLevelBVH = new AccellerationData() {data = BvhDataAdapter.CreateBVH(Triangles, Vertices)};
}
}
public bool Intersect(ref TriangleDataInfo ti, Point[] meshVertices, ref RayData ray, ref float thit, ref float u, ref float v)
{
var p0 = meshVertices[ti.v0.VertexIndex];
var p1 = meshVertices[ti.v1.VertexIndex];
var p2 = meshVertices[ti.v2.VertexIndex];
Vector e1, e2, s1;
Point.Sub(ref p1, ref p0, out e1);
Point.Sub(ref p2, ref p0, out e2);
Vector.Cross(ref ray.Dir, ref e2, out s1);
var divisor = Vector.Dot(ref s1, ref e1);
if (divisor < MathLab.Epsilon)
return false;
var invDivisor = 1f / divisor;
Vector d, s2;
Point.Sub(ref ray.Org, ref p0, out d);
var b1 = Vector.Dot(ref d, ref s1) * invDivisor;
if (b1 < 0f)
return false;
Vector.Cross(ref d, ref e1, out s2);
var b2 = Vector.Dot(ref ray.Dir, ref s2) * invDivisor;
if (b2 < 0f)
return false;
var b0 = 1f - b1 - b2;
if (b0 < 0f)
return false;
var t = Vector.Dot(ref e2, ref s2) * invDivisor;
if (t < ray.minT || t > ray.maxT)
return false;
thit = t;
u = b1;
v = b2;
return true;
}
public static void Sample(ref TriangleDataInfo tri,Point[] meshVertices, float u0, float u1, out Point samplePoint, out float b0, out float b1, out float b2)
{
b0 = 0f;
b1 = 0f;
MC.UniformSampleTriangle(u0, u1, ref b0, ref b1);
var p0 = meshVertices[tri.v0.VertexIndex];
var p1 = meshVertices[tri.v1.VertexIndex] - p0;
var p2 = meshVertices[tri.v2.VertexIndex] - p0;
b2 = 1f - (b0) - (b1);
samplePoint = new Point(
((b0) * p0.x + (b1) * p1.x + (b2) * p2.x),
((b0) * p0.y + (b1) * p1.y + (b2) * p2.y),
((b0) * p0.z + (b1) * p1.z + (b2) * p2.z));
}
public int CompareTriangles(Triangle t1, Triangle t2, Axis a = Axis.PLANE_Y)
{
var p1 = t1.Center(sceneVertices);
var p2 = t2.Center(sceneVertices);
return p1.Component(a).CompareTo(p2.Component(a));
}
