SceneCameraProjection.h

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#pragma once
 
#include <glm/mat4x4.hpp>
#include <glm/vec3.hpp>
 
#include <optional>
 
namespace eve::graphics {
class Camera3D;
}
 
namespace eve::scene {
 
struct ScreenRay {
    glm::vec3 origin{0.0f};
    glm::vec3 direction{0.0f, 0.0f, -1.0f};
};
 
struct CameraClip {
    glm::mat4 clip{1.0f};
    glm::mat4 inverse{1.0f};
};
 
class ISceneCameraProjection {
public:
    static constexpr const char* capabilityName = "ISceneCameraProjection";
 
    virtual ~ISceneCameraProjection() = default;
 
    virtual std::optional<ScreenRay> screenRay(graphics::Camera3D& cam, float screenX, float screenY, float viewW,
                                               float viewH) const = 0;
 
    virtual std::optional<CameraClip> clipForViewport(graphics::Camera3D& cam, float viewW, float viewH) const = 0;
};
 
}  // namespace eve::scene