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Added camera getters for ease of use #1994

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Added camera getters for ease of use #1994

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6 changes: 6 additions & 0 deletions library/private/camera_impl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,12 @@ class camera_impl : public camera
camera& setCurrentAsDefault() override;
camera& resetToDefault() override;
camera& resetToBounds(double zoomFactor = 0.9) override;

// New getters
angle_deg_t getYaw() const;
angle_deg_t getAzimuth() const;
angle_deg_t getElevation() const;

///@}

/**
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1 change: 1 addition & 0 deletions library/public/camera.h
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Expand Up @@ -91,6 +91,7 @@ class F3D_EXPORT camera
*/
virtual camera& resetToBounds(double zoomFactor = 0.9) = 0;


protected:
//! @cond
camera() = default;
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24 changes: 24 additions & 0 deletions library/src/camera_impl.cxx
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Expand Up @@ -296,3 +296,27 @@ vtkCamera* camera_impl::GetVTKCamera()
return this->Internals->VTKRenderer->GetActiveCamera();
}
};

//----------------------------------------------------------------------------
angle_deg_t camera_impl::getYaw() const
{
vtkCamera* cam = this->GetVTKCamera();
double* dir = cam->GetDirectionOfProjection();
return vtkMath::DegreesFromRadians(std::atan2(dir[2], dir[0]));
}

//----------------------------------------------------------------------------
angle_deg_t camera_impl::getAzimuth() const
{
vtkCamera* cam = this->GetVTKCamera();
double* dir = cam->GetDirectionOfProjection();
return vtkMath::DegreesFromRadians(std::atan2(-dir[0], -dir[2]));
}

//----------------------------------------------------------------------------
angle_deg_t camera_impl::getElevation() const
{
vtkCamera* cam = this->GetVTKCamera();
double* dir = cam->GetDirectionOfProjection();
return vtkMath::DegreesFromRadians(std::asin(dir[1]));
}
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