int CModelViewRender::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;
// create new scene root
static CHashString hszSceneType(_T("CWorld"));
if (!CreateEEObject(NULL, &hszSceneType, m_hszSceneName, NULL))
{
return -1;
}
if (!m_RenderContext.Create(*this, false))
{
return -1;
}
// set model viewer scene's render context
if (!m_RenderContext.SetScene(&m_hszSceneName))
{
return -1;
}
if (!m_ViewCamera.CreateCamera(&m_hszSceneName))
{
return -1;
}
if (!m_RenderContext.SetActiveCamera(m_ViewCamera))
{
return -1;
}
m_RenderContext.SetCameraPosition(m_v3CameraPos);
EulerAngle cameraOrientation(0.0, 0.0, 180.0);
m_RenderContext.SetCameraOrientation(cameraOrientation);
return 0;
}
void PDFDocumentTools::CalculateCameraPropertiesFromInventorCamera(
Vector3 inventorCameraPosition, Vector4 inventorCameraOrientation, float inventorCameraFocalDistance, float inventorCameraHeight, // inputs
Vector3& camCenterOfOrbit, Vector3& camCenterToCamera, float& camRadiusOfOrbit, float& camRollAngle, float& camFOVAngle
)
{
SbVec3f cameraRotationAxis(inventorCameraOrientation[0], inventorCameraOrientation[1], inventorCameraOrientation[2]);
SbRotation cameraOrientation(cameraRotationAxis, inventorCameraOrientation[3]);
SbMatrix cameraRotationMatrix;
cameraOrientation.getValue(cameraRotationMatrix);
//Vector3 kosXAxis(1,0,0);
//Vector3 kosYAxis(0,1,0);
Vector3 kosZAxis(0,0,1);
Vector3 camXAxis(cameraRotationMatrix[0][0], cameraRotationMatrix[0][1], cameraRotationMatrix[0][2]);
Vector3 camYAxis(cameraRotationMatrix[1][0], cameraRotationMatrix[1][1], cameraRotationMatrix[1][2]);
Vector3 camZAxis(cameraRotationMatrix[2][0], cameraRotationMatrix[2][1], cameraRotationMatrix[2][2]);
Vector3 camYAxisInverted = camYAxis * -1;
Vector3 centerToCamera = camZAxis * inventorCameraFocalDistance;
Vector3 centerOfOrbit = inventorCameraPosition - centerToCamera;
centerToCamera.normalize(); // Must be AFTER calculation of centerOfOrbit!
Vector4 mx(cameraRotationMatrix[0][0], cameraRotationMatrix[0][1], cameraRotationMatrix[0][2], cameraRotationMatrix[0][3]);
Vector4 my(cameraRotationMatrix[1][0], cameraRotationMatrix[1][1], cameraRotationMatrix[1][2], cameraRotationMatrix[1][3]);
Vector4 mz(cameraRotationMatrix[2][0], cameraRotationMatrix[2][1], cameraRotationMatrix[2][2], cameraRotationMatrix[2][3]);
Vector4 mr(cameraRotationMatrix[3][0], cameraRotationMatrix[3][1], cameraRotationMatrix[3][2], cameraRotationMatrix[3][3]);
Matrix4 camMatrix(mx, my, mz, mr);
Vector3 projectionAxis1 = camZAxis.cross(kosZAxis);
Vector3 projectionAxis2 = projectionAxis1.cross(camZAxis);
projectionAxis2.normalize();
// Calc roll angle
double rollAangleRadians = acos(camYAxisInverted.dot(projectionAxis2));
double rollAngleDegrees = (rollAangleRadians / M_PI * 180.0) + 180.0;
double angleRadBetweenProjectionAxisAndCamXAxis = acos(camXAxis.dot(projectionAxis2));
if (angleRadBetweenProjectionAxisAndCamXAxis < (M_PI/2.0))
{
rollAngleDegrees = 360.0 - rollAngleDegrees;
}
// Calc FOV angle
double fieldOfViewAngle = 45.0;
if (inventorCameraHeight != 0)
{
fieldOfViewAngle = 180.0/(M_PI/inventorCameraHeight);
}
if (fieldOfViewAngle > 180.0) // Can happen if Orthographic camera mode is selected in inventor
{
fieldOfViewAngle = 45.0;
}
// Return result values
camCenterOfOrbit = centerOfOrbit;
camCenterToCamera = centerToCamera;
camRadiusOfOrbit = inventorCameraFocalDistance;
camRollAngle = rollAngleDegrees;
camFOVAngle = fieldOfViewAngle;
}