TileMap.cpp

#include "TileMap.hpp"

TileMap::TileMap(const sf::Texture& texture, const sf::Vector2i& tileSize)
	: m_texture(texture)
	, m_tileSize(tileSize)
{
}

void TileMap::load(const Map& map)
{
	const int width = map.getSize().x;
	const int height = map.getSize().y;

	m_vertices.resize(width * height * 4);

	for (int y = 0; y < height; ++y)
		for (int x = 0; x < width; ++x)
		{
			const int tileNumber = map.getTile(x, y).tileNumber;

			const int tu = tileNumber % (m_texture.getSize().x / m_tileSize.x);
			const int tv = tileNumber / (m_texture.getSize().x / m_tileSize.x);

			sf::Vertex* quad = &m_vertices[(x + y * width) * 4];

			quad[0].position = sf::Vector2f((x + 0.f) * m_tileSize.x, (y + 0.f) * m_tileSize.y);
			quad[1].position = sf::Vector2f((x + 1.f) * m_tileSize.x, (y + 0.f) * m_tileSize.y);
			quad[2].position = sf::Vector2f((x + 1.f) * m_tileSize.x, (y + 1.f) * m_tileSize.y);
			quad[3].position = sf::Vector2f((x + 0.f) * m_tileSize.x, (y + 1.f) * m_tileSize.y);

			quad[0].texCoords = sf::Vector2f((tu + 0.f) * m_tileSize.x, (tv + 0.f) * m_tileSize.y);
			quad[1].texCoords = sf::Vector2f((tu + 1.f) * m_tileSize.x, (tv + 0.f) * m_tileSize.y);
			quad[2].texCoords = sf::Vector2f((tu + 1.f) * m_tileSize.x, (tv + 1.f) * m_tileSize.y);
			quad[3].texCoords = sf::Vector2f((tu + 0.f) * m_tileSize.x, (tv + 1.f) * m_tileSize.y);
		}
}

void TileMap::draw(sf::RenderWindow& window) const
{
	window.draw(m_vertices.data(), m_vertices.size(), sf::Quads, &m_texture);
}