diff options
| -rw-r--r-- | progs/xdemos/shape.c | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/progs/xdemos/shape.c b/progs/xdemos/shape.c index 9cae9eb289..dbbc0b4ff7 100644 --- a/progs/xdemos/shape.c +++ b/progs/xdemos/shape.c @@ -17,6 +17,9 @@ #include <math.h> #include <stdio.h> #include <stdlib.h> +#include <sys/time.h> +#include <time.h> +#include <unistd.h> #include <X11/Xlib.h> #include <X11/Xutil.h> #include <X11/keysym.h> @@ -37,6 +40,21 @@ static int MinSides = 3; static int MaxSides = 20; +/* return current time (in seconds) */ +static double +current_time(void) +{ + struct timeval tv; +#ifdef __VMS + (void) gettimeofday(&tv, NULL ); +#else + struct timezone tz; + (void) gettimeofday(&tv, &tz); +#endif + return (double) tv.tv_sec + tv.tv_usec / 1000000.0; +} + + /* * Draw the OpenGL stuff and do a SwapBuffers. */ @@ -140,17 +158,6 @@ static void display(Display *dpy, Window win) /* - * Called when no events are pending. - */ -static void idle(void) -{ - Xangle += 2.0; - Yangle += 3.3; - Redraw = 1; -} - - -/* * This is called when we have to recompute the window shape bitmask. * We just generate an n-sided regular polygon here but any other shape * would be possible. @@ -262,11 +269,15 @@ static void event_loop(Display *dpy, Window win) } } else { - idle(); - if (Redraw) { - display(dpy, win); - Redraw = 0; - } + static double t0 = -1.0; + double dt, t = current_time(); + if (t0 < 0.0) + t0 = t; + dt = t - t0; + Xangle += 90.0 * dt; /* 90 degrees per second */ + Yangle += 70.0 * dt; + t0 = t; + display(dpy, win); } } } |