internal void AddRTKdTree(RayTracer_552.KdTreeNode rootNode)
{
UWB_SceneNode n = new UWB_SceneNode();
m_SceneDatabase.insertChildNode(n);
UWB_PrimitiveList list = new UWB_PrimitiveList();
n.setPrimitive(list);
AddBox(rootNode, list);
}
internal void AddBox(RayTracer_552.KdTreeNode node, UWB_PrimitiveList list)
{
defineBox(list, node.Bounds.Min, node.Bounds.Max);
if (!node.IsLeafNode()) {
AddBox(node.LeftChild, list);
AddBox(node.RightChild, list);
}
}
private void defineBox(UWB_PrimitiveList list, Vector3 min, Vector3 max)
{
UWB_PrimitiveLine l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, min.Y, min.Z);
l.setEndPoint(max.X, min.Y, min.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, min.Y, min.Z);
l.setEndPoint(min.X, max.Y, min.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, min.Y, min.Z);
l.setEndPoint(min.X, min.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(max.X, max.Y, max.Z);
l.setEndPoint(min.X, max.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(max.X, max.Y, max.Z);
l.setEndPoint(max.X, min.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(max.X, max.Y, max.Z);
l.setEndPoint(max.X, max.Y, min.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, max.Y, min.Z);
l.setEndPoint(max.X, max.Y, min.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, max.Y, min.Z);
l.setEndPoint(min.X, max.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, min.Y, max.Z);
l.setEndPoint(max.X, min.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(min.X, min.Y, max.Z);
l.setEndPoint(min.X, max.Y, max.Z);
list.append(l);
l = new UWB_PrimitiveLine();
l.setStartPoint(max.X, min.Y, min.Z);
l.setEndPoint(max.X, max.Y, min.Z);
list.append(l);
}
private void NewSceneDatabase()
{
m_SceneDatabase = new UWB_SceneNode();
mCamera = new UWB_SceneNode();
mCameraPrimitives = new UWB_PrimitiveList();
}
private void AddCamera(RayTracer_552.RTCamera c)
{
// Look at position
UWB_SceneNode atN = new UWB_SceneNode();
UWB_XNAPrimitiveMesh at = new UWB_XNAPrimitiveMesh("sphere");
at.Material.Diffuse = new Vector4(0.8f, 0.1f, 0.1f, 1.0f);
atN.setPrimitive(at);
UWB_XFormInfo atxf = atN.getXFormInfo();
atxf.SetTranslation(c.AtPosition);
atxf.SetScale(new Vector3(0.3f, 0.3f, 0.3f));
atN.setXFormInfo(atxf);
// Eye position
UWB_SceneNode eyeN = new UWB_SceneNode();
UWB_XNAPrimitiveMesh eye = new UWB_XNAPrimitiveMesh("cone");
eyeN.setPrimitive(eye);
UWB_XFormInfo eyexf = eyeN.getXFormInfo();
eyexf.SetTranslation(c.EyePosition);
mCameraPosition = c.EyePosition;
Vector3 init = new Vector3(0, 0, 1); // initial cone orientation
Vector3 final = c.AtPosition - c.EyePosition;
final = Vector3.Normalize(final);
float dot = Vector3.Dot(init, final);
if (Math.Abs(dot) < 0.9999)
{
float angle = (float)Math.Acos(dot);
Vector3 axis = Vector3.Cross(init, final);
axis = Vector3.Normalize(axis);
Quaternion q = Quaternion.CreateFromAxisAngle(axis, angle);
eyexf.SetRotationQuat(q);
}
eyeN.setXFormInfo(eyexf);
// Lines ...
UWB_SceneNode lineN = new UWB_SceneNode();
mCameraPrimitives = new UWB_PrimitiveList();
lineN.setPrimitive(mCameraPrimitives);
UWB_PrimitiveLine l = new UWB_PrimitiveLine();
l.setStartPoint(c.EyePosition.X, c.EyePosition.Y, c.EyePosition.Z);
l.setEndPoint(c.AtPosition.X, c.AtPosition.Y, c.AtPosition.Z);
mCameraPrimitives.append(l);
mCamera.insertChildNode(lineN);
mCamera.insertChildNode(atN);
mCamera.insertChildNode(eyeN);
}
internal void AddRTScene(RayTracer_552.RTCamera c, RayTracer_552.SceneDatabase rtScene)
{
UWB_Primitive prim;
NewSceneDatabase();
SceneResource<RTGeometry> allGeom = rtScene.GetAllGeom();
for (int i = 0; i < allGeom.Count; i++)
{
RTGeometry g = (RTGeometry)allGeom.ResourceLookup(i);
switch (g.GeomType()) {
case RTGeometry.RTGeometryType.Sphere:
RTSphere s = (RTSphere)g;
prim = CreateSphereMesh();
SetMeshMaterial(prim, rtScene.GetMaterial(s.GetMaterialIndex()));
float scale =s.Radius/2f;
CreateNode(s.Center, scale, scale, scale, prim);
break;
case RTGeometry.RTGeometryType.Rectangle:
RTRectangle r = (RTRectangle) g;
prim = CreateRectangle(r);
SetMeshMaterial(prim, rtScene.GetMaterial(r.GetMaterialIndex()));
UWB_SceneNode node = CreateNode(r.GetCenter(), r.GetUSize()/2f, 1f, r.GetVSize()/2f, prim);
// now rotate the y-vector of node to point towards r.Normal;
float dot = (float)Math.Abs(Vector3.Dot(Vector3.UnitY, r.GetNormal()));
if (dot < 0.9999f)
{
float angle = (float)Math.Acos(dot);
Vector3 axis = Vector3.Cross(Vector3.UnitY, r.GetNormal());
axis.Normalize();
Quaternion q = Quaternion.CreateFromAxisAngle(axis, angle);
UWB_XFormInfo xf = node.getXFormInfo();
xf.SetRotationQuat(q);
node.setXFormInfo(xf);
}
break;
case RTGeometry.RTGeometryType.Triangle:
RTTriangle t = (RTTriangle)g;
Vector3[] v = t.GetVertices();
prim = new UWB_PrimitiveTriangle(v[0], v[1], v[2]);
prim.EnableLighting(true);
prim.EnableTexturing(false);
SetMeshMaterial(prim, rtScene.GetMaterial(t.GetMaterialIndex()));
CreateNode(Vector3.Zero, 1f, 1f, 1f, prim);
break;
}
}
AddCamera(c);
AddLights(rtScene);
// to show ray list
mShownRayX = mShownRayY = 0;
mRaysToShow = new UWB_PrimitiveList();
mDebugInfo = new UWB_SceneNode();
mDebugInfo.setPrimitive(mRaysToShow);
mDebugInfo.insertChildNode(mPixelsToShow.GetAllPixels());
mDebugInfo.insertChildNode(mPixelInWorld.GetAllPixels());
}