TextureSheet.hpp

#ifndef TILEMAP_H
#define TILEMAP_H
 
#include "pch.hpp"
#include <Texture.hpp>
#include <GLTexture.hpp>
 
 
namespace Engine {
  struct TextureSheet {
 
 
 
    static std::vector<Ref<TextureLookup>> loadSheet(const std::string& path, int inputWidth, int inputHeight) {
      auto mainTex = Texture2D::Create(path);
      std::vector<Ref<TextureLookup>> lookup = std::vector<Ref<TextureLookup>>();
 
      int boardWidth = (int) mainTex->getWidth();
      int boardHeight = (int) mainTex->getHeight();
 
      int wLen = boardWidth / inputWidth;
      int hLen = boardHeight / inputHeight;
 
      float glWidth = ((float) inputWidth) / ((float) boardWidth);
      float glHeight = ((float) inputHeight) / ((float) boardHeight);
 
      for (int y = 0; y < hLen; ++y) {
        for (int x = 0; x < wLen; ++x) {
          auto map = TextureMap::Map2D(glWidth, glHeight, glWidth * (float) x, glHeight * (float) (hLen - y - 1));
          auto sub = CreateRef<TextureLookup>(mainTex, map, (float) inputWidth, (float) inputHeight);
          lookup.emplace_back(sub);
        }
      }
 
      return lookup;
    };
 
  };
}
 
#endif