Class Engine

extensions/olcPGEX_RayCastWorld.h:128–208

The RayCastWorld Engine - Inherit from this, implement abstract methods, call Update() and Render() when required

		// The RayCastWorld Engine - Inherit from this, implement abstract
		// methods, call Update() and Render() when required
		class Engine : public olc::PGEX
		{
		public:
			// Identifies side of cell
			enum class CellSide
			{
				North,
				East,
				South,
				West,
				Top,
				Bottom,
			};

		public:
			// Construct world rednering parameters
			Engine(const int screen_w, const int screen_h, const float fov);

		protected:
			// ABSTRACT - User must return a suitable olc::Pixel depending on world location information provided
			virtual olc::Pixel SelectSceneryPixel(const int tile_x, const int tile_y, const olc::rcw::Engine::CellSide side, const float sample_x, const float sample_y, const float distance) = 0;

			// ABSTRACT - User must return a boolean indicating if the tile is solid or not
			virtual bool IsLocationSolid(const float tile_x, const float tile_y) = 0;

			// ABSTRACT - User must return sizes of requested objects in Unit Cell Size
			virtual float GetObjectWidth(const uint32_t id) = 0;
			virtual float GetObjectHeight(const uint32_t id) = 0;

			// ABSTRACT - User must return suitable olc::Pixel for object sprite sample location
			virtual olc::Pixel SelectObjectPixel(const uint32_t id, const float sample_x, const float sample_y, const float distance, const float angle) = 0;
	
			// OPTIONAL - User can handle collsiion response with scenery should they choose to
			virtual void HandleObjectVsScenery(std::shared_ptr<olc::rcw::Object> object, const int tile_x, const int tile_y, const olc::rcw::Engine::CellSide side, const float offset_x, const float offset_y);

			// OPTIONAL - User can handle collsiion response with objects should they choose to
			virtual void HandleObjectVsObject(std::shared_ptr<olc::rcw::Object> object1, std::shared_ptr<olc::rcw::Object> object2);



		public:
			// Sets In-Game Camera position
			void SetCamera(const olc::vf2d& pos, const float heading);

			// Called to update world state
			virtual void Update(float fElapsedTime);

			// Called to draw the world and its contents
			void Render();

		public:
			std::unordered_map<uint32_t, std::shared_ptr<olc::rcw::Object>> mapObjects;

		private:
			// A convenient utility struct to store all the info required to understand how a ray
			// has hit a specific tile
			struct sTileHit
			{