spk_orthographic_camera_component_2d.hpp

#pragma once
 
#include "structure/engine/2d/spk_component_2d.hpp"
#include "structure/engine/2d/spk_transform_2d.hpp"
#include "structure/engine/spk_camera.hpp"
#include "structure/graphics/spk_extend_2d.hpp"
#include "structure/math/spk_vector2.hpp"
#include "structure/opengl/spk_uniform_buffer_object.hpp"
 
namespace spk
{
    class OrthographicCameraComponent2D : public Component2D
    {
    private:
        static spk::OpenGL::UBO &_cameraUBO();
 
        static inline const OrthographicCameraComponent2D *_activeCamera = nullptr;
 
        spk::ContractProvider::Contract _onTransformEditContract;
        spk::ContractProvider::Contract _onCameraProjectionEditContract;
        Camera _camera;
        spk::Extend2D _geometry;
        bool _hasGeometry = false;
 
        struct ProjectionPolicy
        {
            spk::Vector2 pixelsPerUnit = {1.0f, 1.0f};
            float nearPlane = 0.1f;
            float farPlane = 1000.0f;
        };
 
        ProjectionPolicy _policy;
 
        void _applyProjection();
        void _onGeometryChange(const spk::Extend2D &p_geometry) override;
 
    public:
        explicit OrthographicCameraComponent2D(const std::wstring &p_name);

        void start() override;

        void setPixelsPerUnit(const spk::Vector2 &p_pixelsPerUnit);
        const spk::Vector2 &pixelsPerUnit() const;
        void setNearFar(float p_nearPlane, float p_farPlane);
        void setAsActive() const;
    };
}