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 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);
}