#include <gdk/gdk.h>
#include <glib.h>

typedef struct {
  double m;
  double x;
  double y;
  double vx;
  double vy;
} Particle;

int n_particles = 100;
Particle particles[100];

int
main (int argc, char *argv[])
{
  GdkWindow *window;
  GdkVisual *visual 	= NULL;
  GdkColormap *colormap = NULL;
  GdkCursor *cursor 	= NULL;
  GdkGC *gc;

  GdkColor white = {
    0, 0xFFFF, 0xFFFF, 0xFFFF // pixel, red, green, blue
  };

  GdkWindowAttr window_attr = {
    "window",  		// title
    0,         		// event mask
    10, 10,    		// x, y
    100, 100,  		// width, height
    GDK_INPUT_OUTPUT, 	// GdkWindowClass
    visual,    		// GdkVisual*
    colormap,  		// GdkColormap*
    GDK_WINDOW_TOPLEVEL, 	// GdkWindowType
    cursor,		// GdkCursor*
    "wmclass_name",	// window manager class : name
    "wmclass_class",	// window manager class : class
    FALSE		// override redirect ?
  };

  int cx = 200, cy = 200;
  int a;
  unsigned int i;

  for (i=0; i<n_particles; ++i) {
    a = random() % (360*64);
    g_print("%i ", a);
    particles[i].m = 1;
    particles[i].x = 0;
    particles[i].y = 0;
    particles[i].vx = 0;
    particles[i].vy = 0;
  }

  /* Initialize GDK. */
  gdk_init (&argc, &argv);

  window = gdk_window_new(NULL, &window_attr,
			  GDK_WA_TITLE | GDK_WA_X | GDK_WA_Y );

  colormap = gdk_window_get_colormap(window);

  gdk_colormap_alloc_color(colormap, &white, FALSE, TRUE); /* not writable, nearest */

  gc = gdk_gc_new(window);

  gdk_gc_set_foreground(gc, &white);

  gdk_window_show(window);

  g_print("A");
  
  gdk_event_get();

  sleep(1);

  g_print("B");

  gdk_draw_arc(window, gc, TRUE, 20, 20, 10, 10, 0, 64*360);

  gdk_draw_arc(window, gc, TRUE, 40, 30, 10, 10, 0, 64*360);

  gdk_event_get();

  //  g_print("C");

  sleep(5);

  /* Exit from GDK...this call will never return. */
  gdk_exit (0);

  /* Keep compiler from issuing a warning */
  return 0;
}