Fully functional simulation.

I still need to add the restart feature.

src/globals.h

@@ -39,6 +39,13 @@
 #	define WINDOW_HEIGHT 600
 #endif
 
+#include <math.h>
+#ifndef M_PI
+#	define M_PI 3.14159265f
+#endif
+
+#define RAD_TO_DEG(x) (x * 180 / M_PI)
+
 #include <allegro5/allegro.h>
 
 extern int redraw; ///< Whether or not to redraw the screen.

src/main.c

@@ -34,9 +34,18 @@ const char *help =
 	"HELP:\n"
 	"LEFT/RIGHT - turn the ship\n"
 	"UP/DOWN - accelerate/decelerate\n"
+	"I - show/hide simulation information\n"
 	"H - show/hide this help information\n"
 	"Q/ESC - quit";
 
+const char *info_format =
+	"INFO:\n"
+	"x: %f\n"
+	"y: %f\n"
+	"angle: %f (%f degrees)\n"
+	"velX: %f\n"
+	"velY: %f";
+
 int main() {
 	printf("SpaceShipSim v%s\n", VERSION);
 
@@ -108,7 +117,17 @@ int main() {
 			ship_draw(&ship);
 			if(show_info)
 			{
-				// TODO: draw simulation stats
+				char info[256];
+				sprintf(info, info_format,
+						ship.x, ship.y,
+						ship.direction,
+						RAD_TO_DEG(ship.direction),
+						ship.velX, ship.velY);
+				al_draw_multiline_text(font,
+						al_map_rgb(0xFF, 0xFF, 0xFF),
+						5, 5, WINDOW_WIDTH, 10.0f,
+						ALLEGRO_ALIGN_LEFT,
+						info);
 			}
 
 			if(show_help)

src/ship.c

@@ -25,10 +25,6 @@
 #include <allegro5/allegro_primitives.h>
 #include <stdio.h>
 
-#ifndef M_PI
-#	define M_PI 3.14159265f
-#endif
-
 #define SHIP_RADIUS 10.0f  // radius of the ship in pixels
 
 void ship_init(struct ship *ship, int x, int y) {