raytracing/Camera.h

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//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//
//  This software is distributed WITHOUT ANY WARRANTY; without even
//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
//  PURPOSE.  See the above copyright notice for more information.
//============================================================================
#ifndef vtk_m_rendering_raytracing_Camera_h
#define vtk_m_rendering_raytracing_Camera_h
 
#include <vtkm/cont/CoordinateSystem.h>
#include <vtkm/rendering/Camera.h>
#include <vtkm/rendering/CanvasRayTracer.h>
#include <vtkm/rendering/raytracing/Ray.h>
 
namespace vtkm
{
namespace rendering
{
namespace raytracing
{
 
class VTKM_RENDERING_EXPORT Camera
{
 
private:
  struct PixelDataFunctor;
  vtkm::Int32 Height;
  vtkm::Int32 Width;
  vtkm::Int32 SubsetWidth;
  vtkm::Int32 SubsetHeight;
  vtkm::Int32 SubsetMinX;
  vtkm::Int32 SubsetMinY;
  vtkm::Float32 FovX;
  vtkm::Float32 FovY;
  vtkm::Float32 Zoom;
  bool IsViewDirty;
 
  vtkm::Vec3f_32 Look;
  vtkm::Vec3f_32 Up;
  vtkm::Vec3f_32 LookAt;
  vtkm::Vec3f_32 Position;
  vtkm::rendering::Camera CameraView;
  vtkm::Matrix<vtkm::Float32, 4, 4> ViewProjectionMat;
 
public:
  VTKM_CONT
  Camera();
 
  VTKM_CONT
  ~Camera();
 
  // cuda does not compile if this is private
  class PerspectiveRayGen;
  class Ortho2DRayGen;
 
  std::string ToString();
 
  VTKM_CONT
  void SetParameters(const vtkm::rendering::Camera& camera,
                     const vtkm::Int32 width,
                     const vtkm::Int32 height);
 
  VTKM_CONT
  void SetParameters(const vtkm::rendering::Camera& camera,
                     vtkm::rendering::CanvasRayTracer& canvas);
 
  VTKM_CONT
  void SetHeight(const vtkm::Int32& height);
 
  VTKM_CONT
  void WriteSettingsToLog();
 
  VTKM_CONT
  vtkm::Int32 GetHeight() const;
 
  VTKM_CONT
  void SetWidth(const vtkm::Int32& width);
 
  VTKM_CONT
  vtkm::Int32 GetWidth() const;
 
  VTKM_CONT
  vtkm::Int32 GetSubsetWidth() const;
 
  VTKM_CONT
  vtkm::Int32 GetSubsetHeight() const;
 
  VTKM_CONT
  void SetZoom(const vtkm::Float32& zoom);
 
  VTKM_CONT
  vtkm::Float32 GetZoom() const;
 
  VTKM_CONT
  void SetFieldOfView(const vtkm::Float32& degrees);
 
  VTKM_CONT
  vtkm::Float32 GetFieldOfView() const;
 
  VTKM_CONT
  void SetUp(const vtkm::Vec3f_32& up);
 
  VTKM_CONT
  void SetPosition(const vtkm::Vec3f_32& position);
 
  VTKM_CONT
  vtkm::Vec3f_32 GetPosition() const;
 
  VTKM_CONT
  vtkm::Vec3f_32 GetUp() const;
 
  VTKM_CONT
  void SetLookAt(const vtkm::Vec3f_32& lookAt);
 
  VTKM_CONT
  vtkm::Vec3f_32 GetLookAt() const;
 
  VTKM_CONT
  void ResetIsViewDirty();
 
  VTKM_CONT
  bool GetIsViewDirty() const;
 
  VTKM_CONT
  void CreateRays(Ray<vtkm::Float32>& rays, vtkm::Bounds bounds);
 
  VTKM_CONT
  void CreateRays(Ray<vtkm::Float64>& rays, vtkm::Bounds bounds);
 
  VTKM_CONT
  void GetPixelData(const vtkm::cont::CoordinateSystem& coords,
                    vtkm::Int32& activePixels,
                    vtkm::Float32& aveRayDistance);
 
  template <typename Precision>
  VTKM_CONT void CreateRaysImpl(Ray<Precision>& rays, const vtkm::Bounds boundingBox);
 
  void CreateDebugRay(vtkm::Vec2i_32 pixel, Ray<vtkm::Float32>& rays);
 
  void CreateDebugRay(vtkm::Vec2i_32 pixel, Ray<vtkm::Float64>& rays);
 
  bool operator==(const Camera& other) const;
 
private:
  template <typename Precision>
  void CreateDebugRayImp(vtkm::Vec2i_32 pixel, Ray<Precision>& rays);
  VTKM_CONT
  void FindSubset(const vtkm::Bounds& bounds);
 
  template <typename Precision>
  VTKM_CONT void UpdateDimensions(Ray<Precision>& rays,
                                  const vtkm::Bounds& boundingBox,
                                  bool ortho2D);
 
}; // class camera
}
}
} //namespace vtkm::rendering::raytracing
#endif //vtk_m_rendering_raytracing_Camera_h