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#include "level.h"
#include <algorithm>
#include <cstring>
#include <fstream>
#include <iostream>
#include "train.h"
#include "util.h"
Level::Level(int width, int height, Bitmap& tileSprites)
: m_width(width), m_height(height), m_tileSprites(tileSprites)
{
m_tiles = new uint8_t[width * height];
memset(m_tiles, TileGround, width * height);
for (int i = 4; i < 14; i++)
m_tiles[i + 6 * m_width] = TileWall;
}
uint8_t Level::get(int x, int y)
{
if (inBounds(x, y))
return m_tiles[x + y * m_width];
else
return TileGround;
}
void Level::set(int x, int y, uint8_t tile)
{
if (inBounds(x, y))
m_tiles[x + y * m_width] = tile;
}
void Level::update()
{
for (const auto& vehicle : m_vehicles) {
vehicle->update();
}
}
static Point2D GetSpriteForTile(uint8_t tile, int x, int y)
{
Point2D result = { 0, 1 };
switch (TILE_TYPE(tile)) {
case TileGround:
result.x = (x + y) % 2;
result.y = 0;
break;
case TileWall:
result.x = 2;
result.y = 0;
break;
case TileTrack:
result.x = TILE_DATA(tile);
result.y = 2;
break;
}
return result;
}
void Level::draw(Bitmap& bitmap, int xo, int yo)
{
for (int y = 0; y < m_height; ++y) {
for (int x = 0; x < m_width; ++x) {
auto tile = get(x, y);
if (TILE_TYPE(tile) == TileWall)
continue;
int xx = (x - y) * (TileSize / 2) - xo;
int yy = (x + y) * (TileSize / 4) - yo;
Point2D textureIndex = GetSpriteForTile(tile, x, y);
bitmap.blit(m_tileSprites, xx, yy, textureIndex.x * TileSize, textureIndex.y * TileSize, TileSize, TileSize);
}
}
for (int y = 0; y < m_height; ++y) {
for (int x = 0; x < m_width; ++x) {
auto isInTile = [x, y](const auto& vehicle) {
return vehicle->getSpritePosition().x == x && vehicle->getSpritePosition().y == y;
};
auto vehiclesInTile = std::find_if(m_vehicles.begin(), m_vehicles.end(), isInTile);
while (vehiclesInTile != m_vehicles.end()) {
vehiclesInTile->get()->draw(bitmap, xo, yo);
vehiclesInTile = std::find_if(++vehiclesInTile, m_vehicles.end(), isInTile);
}
auto tile = get(x, y);
if (TILE_TYPE(tile) == TileWall) {
int xx = (x - y) * (TileSize / 2) - xo;
int yy = (x + y) * (TileSize / 4) - yo;
Point2D textureIndex = GetSpriteForTile(tile, x, y);
bitmap.blit(m_tileSprites, xx, yy, textureIndex.x * TileSize, textureIndex.y * TileSize, TileSize, TileSize);
}
}
}
}
void Level::addVehicle(int x, int y)
{
auto& ptr = m_vehicles.emplace_back(std::make_unique<Train>(*this));
ptr->setPosition(x, y);
ptr->setSpeed(0.2f);
}
void Level::toggleTile(int x, int y)
{
static const auto updateDirection = [&](int xt, int yt) {
if (TILE_TYPE(get(xt, yt)) == TileTrack)
set(xt, yt, MAKE_TILE(TileTrack, ChooseDirection(*this, xt, yt)));
};
if (inBounds(x, y)) {
auto tile = get(x, y);
if (TILE_TYPE(tile) == TileTrack)
tile = TileGround;
else
tile = MAKE_TILE(TileTrack, ChooseDirection(*this, x, y));
m_tiles[x + y * m_width] = tile;
updateDirection(x - 1, y);
updateDirection(x + 1, y);
updateDirection(x, y - 1);
updateDirection(x, y + 1);
}
}
static const char* DEFAULT_FILENAME = "level.non";
static const char* LEVEL_HEADER = "NON";
static const int LEVEL_HEADER_SIZE = 3;
void Level::save() const
{
std::ofstream outputStream(DEFAULT_FILENAME, std::ios::out | std::ios::binary);
if (!outputStream) {
std::cerr << "Failed to write level to " << DEFAULT_FILENAME << '\n';
return;
}
if (m_width > 255 || m_height > 255) {
std::cerr << "Failed to save level!\n"
<< "Level save format does not allow widths or heights greater than 255\n";
return;
}
outputStream.write(LEVEL_HEADER, LEVEL_HEADER_SIZE);
outputStream.write((char*)&m_width, 1);
outputStream.write((char*)&m_height, 1);
outputStream.write((char*)m_tiles, m_width * m_height);
outputStream.close();
std::cout << "Successfully saved level to " << DEFAULT_FILENAME << '\n';
}
void Level::load()
{
std::ifstream inputStream(DEFAULT_FILENAME, std::ios::in | std::ios::binary);
if (!inputStream) {
std::cerr << "Failed to read level from " << DEFAULT_FILENAME << '\n';
return;
}
char header[LEVEL_HEADER_SIZE];
inputStream.read(header, LEVEL_HEADER_SIZE);
if (strncmp(header, LEVEL_HEADER, LEVEL_HEADER_SIZE) != 0) {
std::cerr << "Level loaded from " << DEFAULT_FILENAME << " does not match expected header!\n";
return;
}
uint8_t width, height;
inputStream.read((char*)&width, 1);
inputStream.read((char*)&height, 1);
int oldSize = m_width * m_height;
int newSize = width * height;
if (oldSize != newSize) {
delete[] m_tiles;
m_tiles = new uint8_t[newSize];
}
inputStream.read((char*)m_tiles, newSize);
inputStream.close();
m_width = width;
m_height = height;
printf("Successfully loaded %dx%d level from %s\n", width, height, DEFAULT_FILENAME);
}
TrackDirection ChooseDirection(Level& level, int x, int y)
{
if (!level.inBounds(x, y)) return NorthSouth;
bool n = TILE_TYPE(level.get(x, y - 1)) == TileTrack;
bool e = TILE_TYPE(level.get(x + 1, y)) == TileTrack;
bool s = TILE_TYPE(level.get(x, y + 1)) == TileTrack;
bool w = TILE_TYPE(level.get(x - 1, y)) == TileTrack;
if ((n || s) && !(e || w)) {
return NorthSouth;
}
if ((e || w) && !(n || s)) {
return EastWest;
} else if (s && e) {
return SouthEast;
} else if (s && w) {
return SouthWest;
} else if (n && w) {
return NorthWest;
} else if (n && e) {
return NorthEast;
}
return NorthSouth;
}
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