gistfile1.cpp

for (unsigned int i = 0; i < dimensions.x; ++i) {
  	for (unsigned int j = 0; j < dimensions.y; ++j) {
			Tile tile = tiles[i + j * dimensions.x];
			if (tile.hasChanged()) {
				sf::Vertex *quad = &vertices[(i + j * dimensions.x) * 4];

				quad[0].position = sf::Vector2f(i * block_size, j * block_size);
				quad[1].position = sf::Vector2f((i + 1) * block_size, j * block_size);
				quad[2].position = sf::Vector2f((i+1) * block_size, (j+1) * block_size);
				quad[3].position = sf::Vector2f(i * block_size, (j+1) * block_size);

				
				sf::FloatRect textureRect = sf::FloatRect(tile.getTileType().getTextureRect());
				quad[0].texCoords = sf::Vector2f(textureRect.left, textureRect.top);
				quad[1].texCoords = sf::Vector2f(textureRect.left + textureRect.width, textureRect.top);
				quad[2].texCoords = sf::Vector2f(textureRect.left + textureRect.width, textureRect.top + textureRect.height);
				quad[3].texCoords = sf::Vector2f(textureRect.left, textureRect.top + textureRect.height);
			}
		}
	}