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#include "level.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, 0, width * height);
}
uint8_t Level::get(int x, int y)
{
if (inBounds(x, y)) {
return m_tiles[x + y * m_width];
} else {
return 0;
}
}
void Level::set(int x, int y, uint8_t tile)
{
if (inBounds(x, y))
m_tiles[x + y * m_width] = tile;
}
void Level::draw(Bitmap& bitmap, int xo, int yo)
{
for (int y = 0; y < 32; ++y) {
for (int x = 0; x < 32; ++x) {
auto tile = get(x, y);
int xx = (x - y) * (TileSize / 2) - xo;
int yy = (x + y) * (TileSize / 4) - yo;
int tx = (x + y) % 2;
int ty = 0;
if (tile == NorthSouth) {
tx = 0;
ty = 2;
} else if (tile == EastWest) {
tx = 1;
ty = 2;
} else if (tile == SouthEast) {
tx = 0;
ty = 3;
} else if (tile == SouthWest) {
tx = 3;
ty = 3;
} else if (tile == NorthWest) {
tx = 1;
ty = 3;
} else if (tile == NorthEast) {
tx = 2;
ty = 3;
}
bitmap.blit(m_tileSprites, xx, yy, tx * TileSize, ty * TileSize, TileSize, TileSize);
}
}
}
void Level::toggleTile(int x, int y)
{
static const auto updateDirection = [&](int xt, int yt) {
if (get(xt, yt) > 0)
set(xt, yt, ChooseDirection(*this, xt, yt));
};
if (inBounds(x, y)) {
auto tile = get(x, y);
if (tile > 0)
tile = 0;
else
tile = 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);
}
}
RailDirection ChooseDirection(Level& level, int x, int y)
{
if (!level.inBounds(x, y)) return NorthSouth;
bool n = level.get(x, y - 1) > 0;
bool e = level.get(x + 1, y) > 0;
bool s = level.get(x, y + 1) > 0;
bool w = level.get(x - 1, y) > 0;
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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