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) );
}
private UWB_SceneNode CreateNode(Vector3 at, float sx, float sy, float sz, UWB_Primitive prim)
{
UWB_SceneNode pNode = new UWB_SceneNode();
pNode.setPrimitive(prim);
UWB_XFormInfo xf = pNode.getXFormInfo();
xf.SetTranslation(at);
xf.SetScale(new Vector3(sx, sy, sz));
pNode.setXFormInfo(xf);
m_SceneDatabase.insertChildNode(pNode);
return pNode;
}
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);
}
