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#define SDL_MAIN_HANDLED
#include <cmath>
#include "window.h"
#include "bitmap.h"
#include "level.h"
#include "train.h"
struct Point2D {
float x, y;
};
Point2D screenToTile(Point2D source)
{
Point2D result;
constexpr int TILE_SIZE = 24;
float mx = source.x;
float my = source.y;
float xx = (mx / TILE_SIZE + my / (TILE_SIZE / 2.f));
float yy = (my / (TILE_SIZE / 2.f) - (mx / TILE_SIZE));
result.x = floor(xx - 1.5f); // Magic numbers
result.y = floor(yy - 0.5f);
return result;
}
void DrawLevel(Bitmap& bitmap, Bitmap& tiles, Level& level, int xo, int yo)
{
bitmap.clear(0xff224466);
for (int y = 0; y < 32; ++y) {
for (int x = 0; x < 32; ++x) {
constexpr int TILE_SIZE = 24;
auto tile = level.get(x, y);
int xx = (x - y) * (TILE_SIZE / 2) - xo;
int yy = (x + y) * (TILE_SIZE / 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(tiles, xx, yy, tx * 24, ty * 24, TILE_SIZE, TILE_SIZE);
}
}
}
int main(int argc, char **argv)
{
constexpr int Height = 240;
constexpr int Width = Height * 16 / 9;
constexpr int Scale = 3;
Window window("Nonortho", Width, Height, Scale);
Bitmap tiles("tiles.png");
Level level(32, 32);
Bitmap bitmap(Width, Height);
int xOffs = 0, yOffs = 0;
int xDrag, yDrag;
bool isDragging = false;
TrainCar car(0, 0);
window.onMouseDown([&](int button, int x, int y) {
if (button == 1) {
static const auto update_direction = [&](int xt, int yt) {
if (level.get(xt, yt) > 0)
level.set(xt, yt, ChooseDirection(level, xt, yt));
};
float mx = x / Scale + xOffs;
float my = y / Scale + yOffs;
Point2D tilePos = screenToTile({ mx, my });
if (level.inBounds(tilePos.x, tilePos.y)) {
auto tile = level.get(tilePos.x, tilePos.y);
if (tile > 0) tile = 0;
else tile = ChooseDirection(level, tilePos.x, tilePos.y);
level.set(tilePos.x, tilePos.y, tile);
update_direction(tilePos.x - 1, tilePos.y);
update_direction(tilePos.x + 1, tilePos.y);
update_direction(tilePos.x, tilePos.y - 1);
update_direction(tilePos.x, tilePos.y + 1);
}
} else if (button == 2 && !isDragging) {
xDrag = x;
yDrag = y;
isDragging = true;
} else {
float mx = x / Scale + xOffs;
float my = y / Scale + yOffs;
auto pos = screenToTile({ mx, my });
car.x = pos.x;
car.y = pos.y;
}
});
window.onMouseUp([&](int button, int x, int y) {
if (button == 2 && isDragging)
isDragging = false;
});
window.onMouseMove([&](int x, int y) {
if (isDragging) {
xOffs -= (x - xDrag) / Scale;
yOffs -= (y - yDrag) / Scale;
xDrag = x;
yDrag = y;
}
});
while (!window.shouldClose()) {
window.update();
DrawLevel(bitmap, tiles, level, xOffs, yOffs);
car.update(level);
car.draw(bitmap, xOffs, yOffs);
window.draw(bitmap);
}
return 0;
}
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