1 files changed, 154 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..b1942c9
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,154 @@
+#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("../res/tiles.png");
+	Level level(32, 32);
+
+	Bitmap bitmap(Width, Height);
+	TrainCar car(0, 0);
+
+	int xOffs = 0, yOffs = 0;
+	int xDrag, yDrag;
+	bool isDragging = false;
+
+	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;
+}