tbx_parallax_backdrop.hpp

 
#ifndef TurtleBrainsExpress_ParallaxBackdrop_hpp
#define TurtleBrainsExpress_ParallaxBackdrop_hpp
 
#include <turtle_brains/graphics/tb_graphic.hpp>
#include <turtle_brains/graphics/tb_sprite.hpp>
 
#include <vector>
 
namespace TurtleBrains::Express::Graphics
{
 
    class ParallaxBackdrop : public tbGraphics::Graphic
    {
    public:
        enum class ScrollingType
        {
            kNoScrolling,    
            kHorizontal,     
            kVertical,       
            kFullScrolling,  
        };
 
        explicit ParallaxBackdrop(const ScrollingType& scrollingType = ScrollingType::kFullScrolling);
 
        virtual ~ParallaxBackdrop(void);
 
        void AddParallaxLayer(const tbCore::String& layerFilepath, const float parallaxMultiplier,
            const tbMath::Vector2& offset = tbMath::Vector2::Zero());
 
        void AddParallaxLayer(const tbGraphics::Sprite& layerSprite, const float parallaxMultiplier,
            const tbMath::Vector2& offset = tbMath::Vector2::Zero());
 
        ScrollingType GetScrollingType(void) const { return mScrollingType; }
 
        void ResetTargetArea(void);
 
        void ResetTargetArea(float targetWidth, float targetHeight);
 
    protected:
        virtual void OnRender(void) const override;
 
    private:
        struct ParallaxLayer
        {
            tbGraphics::Sprite mSprite;
            float mMultiplier;
        };
 
        std::vector<ParallaxLayer> mParallaxLayers;
        ScrollingType mScrollingType;
        tbMath::Vector2 mTargetArea;
    };
 
}; /* namespace TurtleBrains::Express::Graphics */
 
namespace tbxGraphics = TurtleBrains::Express::Graphics;
 
#endif /* TurtleBrainsExpress_ParallaxBackdrop_hpp */