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);
}
private void ShowOneDebugPixelAt(Vector3 p, System.Drawing.Color c)
{
if (mNumPixelNodesUsed >= mPixelsToShow.numChildren())
{
// need to create new ones
UWB_Primitive prim = CreateSphereMesh();
prim.EnableLighting(false);
UWB_SceneNode pNode = new UWB_SceneNode();
pNode.setPrimitive(prim);
UWB_XFormInfo xf = pNode.getXFormInfo();
xf.SetTranslation(p);
xf.SetScale(new Vector3(kPixelSize));
pNode.setXFormInfo(xf);
prim.Material.Diffuse = Vector4.Zero;
prim.Material.Specular = Vector4.Zero;
prim.Material.Ambient = Vector4.Zero;
prim.Material.Emissive = new Vector4(c.R / 255.0f, c.G / 255.0f, c.B / 255.0f, 1f);
mPixelsToShow.insertChildNode(pNode);
}
else
{
// there are more to be reused ...
UWB_SceneNode n = mPixelsToShow.getChildNode(mNumPixelNodesUsed);
UWB_XFormInfo xf = n.getXFormInfo();
xf.SetTranslation(new Vector3(p.X, p.Y, p.Z));
UWB_Primitive prim = n.getPrimitive();
prim.setVisible(true);
prim.Material.Diffuse = Vector4.Zero;
prim.Material.Specular = Vector4.Zero;
prim.Material.Ambient = Vector4.Zero;
prim.Material.Emissive = new Vector4(c.R / 255.0f, c.G / 255.0f, c.B / 255.0f, 1f);
}
}
internal RTModelViewer()
{
m_DrawHelper.initializeModelTransform();
m_RootNode = new UWB_SceneNode("Scene");
NewSceneDatabase();
mCamera = new UWB_SceneNode();
UWB_SceneNode pAxisNode = new UWB_SceneNode("axis frame");
UWB_XFormInfo xf = pAxisNode.getXFormInfo();
xf.SetScale(new Vector3(3.0f, 3.0f, 3.0f));
pAxisNode.setXFormInfo(xf);
UWB_XNAPrimitiveMeshAxis pMeshAxis = new UWB_XNAPrimitiveMeshAxis();
//pMeshAxis.EnableBlending(true);
pAxisNode.setPrimitive(pMeshAxis);
m_RootNode.insertChildNode(pAxisNode);
m_WorldBounds.setCorners(new Vector3(-100, -100, -100), new Vector3(100, 100, 100));
}
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());
}