perspective.h

#ifdef _MSC_VER
#pragma once
#endif

#ifndef _SPICA_PERSPECTIVE_CAMERA_H_
#define _SPICA_PERSPECTIVE_CAMERA_H_

#include "core/cobject.h"
#include "core/vector3d.h"
#include "core/camera.h"

namespace spica {

class SPICA_EXPORTS PerspectiveCamera : public Camera {
public:
    // Public methods
    PerspectiveCamera();
    PerspectiveCamera(RenderParams &params);
    PerspectiveCamera(const Transform& cameraToWorld,
                      const Bounds2d& screen, double lensRadius,
                      double focalLength, double fov,
                      std::shared_ptr<Film> film);

    PerspectiveCamera(const PerspectiveCamera&) = default;
    ~PerspectiveCamera() = default;

    PerspectiveCamera& operator=(const PerspectiveCamera&) = default;

    Ray spawnRay(const Point2i& pixel, const Point2d& randFilm,
                 const Point2d& randLens, double* pdfPos = nullptr,
                 double* pdfDir = nullptr) const override;

    Spectrum We(const Ray& ray, Point2d* pRaster = nullptr) const override;
    void pdfWe(const Ray& ray, double* pdfPos, double* pdfDir) const override;
    Spectrum sampleWi(const Interaction& ref, const Point2d& rand,
                      Vector3d* wi, double* pdf, Point2d* pRaster,
                      VisibilityTester* vis) const override;

private:
    // Private fields
    Vector3d uCamera_, vCamera_;
    double areaWorld_;

};  // class OrthographicCamera

SPICA_EXPORT_PLUGIN(PerspectiveCamera, "Perspective camera");

}  // namespace spica

#endif  // _SPICA_PERSPECTIVE_CAMERA_H_