IsometricRenderer.h

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/*
 * Olympe Engine V2 - 2025
 * Isometric Renderer
 * 
 * -> REFACTORED: Now provides utility functions only
 * Batching and sorting moved to unified rendering pipeline in ECS_Systems.cpp
 */
 
#pragma once
 
#include <SDL3/SDL.h>
#include <vector>
#include <memory>
#include "../vector.h"
 
namespace Olympe {
namespace Rendering {
 
    // Tile flip flags (from Tiled format)
    constexpr uint32_t FLIPPED_HORIZONTALLY_FLAG = 0x80000000;
    constexpr uint32_t FLIPPED_VERTICALLY_FLAG = 0x40000000;
    constexpr uint32_t FLIPPED_DIAGONALLY_FLAG = 0x20000000;
    constexpr uint32_t TILE_ID_MASK = 0x1FFFFFFF;
 
    // -> Isometric utility functions (coordinate conversion, culling)
    // Note: Tile batching and sorting moved to unified pipeline in ECS_Systems.cpp
    class IsometricRenderer
    {
    public:
        IsometricRenderer();
        ~IsometricRenderer();
 
        // Setup
        void Initialize(SDL_Renderer* renderer, int tileWidth, int tileHeight);
        
        // Camera control
        void SetCamera(float camX, float camY, float zoom);
        void SetViewport(int screenWidth, int screenHeight);
        
        // -> Utility functions (coordinate conversion)
        Vector WorldToScreen(float worldX, float worldY) const;
        Vector ScreenToWorld(float screenX, float screenY) const;
        
        // Culling utilities
        bool IsTileVisible(int worldX, int worldY) const;
        void GetVisibleTileRange(int& minX, int& minY, int& maxX, int& maxY) const;
 
    private:
        SDL_Renderer* m_renderer;
        
        // Tile dimensions
        int m_tileWidth;
        int m_tileHeight;
        
        // Camera state
        float m_cameraX;
        float m_cameraY;
        float m_zoom;
        
        // Viewport
        int m_screenWidth;
        int m_screenHeight;
        
        // Rendering constants
        static constexpr float ISOMETRIC_OFFSET_Y = 200.0f;
        static constexpr float CULL_MARGIN = 100.0f;
        static constexpr float TALL_TILE_MULTIPLIER = 5.0f;
        static constexpr int VISIBLE_TILE_PADDING = 5;
        
        // Helper functions
        float CalculateCullingMargin() const;
    };
 
} // namespace Rendering
} // namespace Olympe