From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz

[xscreensaver] / hacks / glx / gears.c

diff --git a/hacks/glx/gears.c b/hacks/glx/gears.c
index added7c65b840fb4fc806e38873ef7307c68dff9..0c292a2eae8ef04f1d6369c88b71875cad22ec21 100644 (file)
--- a/hacks/glx/gears.c
+++ b/hacks/glx/gears.c
@@ -1,4 +1,4 @@
-/* gears, Copyright (c) 2007 Jamie Zawinski <jwz@jwz.org>
+/* gears, Copyright (c) 2007-2014 Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -16,6 +16,7 @@
                        "*count:        0           \n" \
                        "*showFPS:      False       \n" \
                        "*wireframe:    False       \n" \
+                       "*suppressRotationAnimation: True\n" \
 
 # define refresh_gears 0
 # define release_gears 0
@@ -98,52 +99,18 @@ reshape_gears (ModeInfo *mi, int width, int height)
              0.0, 0.0, 0.0,
              0.0, 1.0, 0.0);
 
-  glClear(GL_COLOR_BUFFER_BIT);
-}
-
-
-ENTRYPOINT Bool
-gears_handle_event (ModeInfo *mi, XEvent *event)
-{
-  gears_configuration *bp = &bps[MI_SCREEN(mi)];
-
-  if (event->xany.type == ButtonPress &&
-      event->xbutton.button == Button1)
-    {
-      bp->button_down_p = True;
-      gltrackball_start (bp->trackball,
-                         event->xbutton.x, event->xbutton.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
-  else if (event->xany.type == ButtonRelease &&
-           event->xbutton.button == Button1)
-    {
-      bp->button_down_p = False;
-      return True;
-    }
-  else if (event->xany.type == ButtonPress &&
-           (event->xbutton.button == Button4 ||
-            event->xbutton.button == Button5))
-    {
-      gltrackball_mousewheel (bp->trackball, event->xbutton.button, 10,
-                              !!event->xbutton.state);
-      return True;
-    }
-  else if (event->xany.type == MotionNotify &&
-           bp->button_down_p)
-    {
-      gltrackball_track (bp->trackball,
-                         event->xmotion.x, event->xmotion.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+  }
+# endif
 
-  return False;
+  glClear(GL_COLOR_BUFFER_BIT);
 }
 
 
-
 static void
 free_gear (gear *g)
 {
@@ -280,7 +247,8 @@ new_gear (ModeInfo *mi, gear *parent)
     double pix = g->tooth_h * MI_HEIGHT(mi); /* approx. tooth size in pixels */
     if (pix <= 2.5)      g->size = INVOLUTE_SMALL;
     else if (pix <= 3.5) g->size = INVOLUTE_MEDIUM;
-    else                 g->size = INVOLUTE_LARGE;
+    else if (pix <= 25)  g->size = INVOLUTE_LARGE;
+    else                 g->size = INVOLUTE_HUGE;
   }
 
   g->base_p = !parent;
@@ -690,16 +658,20 @@ planetary_gears (ModeInfo *mi)
   g4->y = 0;
   g4->th = -g3->th;
 
+  /* rotate central gear 1/2 tooth-size if odd number of teeth */
+  if (g4->nteeth & 1)
+    g4->th -= (180.0 / g4->nteeth);
+
   g0->inverted_p  = True;
   g0->x           = 0;
   g0->y           = 0;
-  g0->nteeth      = g4->nteeth * 3;
-  g0->r           = g4->r * 3.05;
+  g0->nteeth      = g1->nteeth * 3;
+  g0->r           = g1->r * 3.05;
   g0->inner_r     = g0->r * 0.8;
   g0->inner_r2    = 0;
   g0->inner_r3    = 0;
-  g0->th          = -(g4->th - (180 / g0->nteeth));
-  g0->ratio       = g4->ratio / 3;
+  g0->th          = g1->th + (180 / g0->nteeth);
+  g0->ratio       = g1->ratio / 3;
 
   g0->tooth_slope = 0;
   g0->nubs        = 3;
@@ -726,16 +698,7 @@ init_gears (ModeInfo *mi)
   int wire = MI_IS_WIREFRAME(mi);
   int i;
 
-  if (!bps) {
-    bps = (gears_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (gears_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-
-    bp = &bps[MI_SCREEN(mi)];
-  }
+  MI_INIT (mi, bps, NULL);
 
   bp = &bps[MI_SCREEN(mi)];
 
@@ -761,20 +724,30 @@ init_gears (ModeInfo *mi)
       glLightfv(GL_LIGHT0, GL_SPECULAR, spc);
     }
 
-  {
-    double spin_speed   = 0.5;
-    double wander_speed = 0.01;
-    double spin_accel   = 0.25;
-
-    bp->rot = make_rotator (do_spin ? spin_speed : 0,
-                            do_spin ? spin_speed : 0,
-                            do_spin ? spin_speed : 0,
-                            spin_accel,
-                            do_wander ? wander_speed : 0,
-                            True
-                            );
-    bp->trackball = gltrackball_init ();
-  }
+  if (! bp->rot)
+    {
+      double spin_speed   = 0.5;
+      double wander_speed = 0.01;
+      double spin_accel   = 0.25;
+
+      bp->rot = make_rotator (do_spin ? spin_speed : 0,
+                              do_spin ? spin_speed : 0,
+                              do_spin ? spin_speed : 0,
+                              spin_accel,
+                              do_wander ? wander_speed : 0,
+                              True
+                              );
+      bp->trackball = gltrackball_init (True);
+    }
+
+  if (bp->gears)
+    {
+      for (i = 0; i < bp->ngears; i++)
+        free_gear (bp->gears[i]);
+      free (bp->gears);
+      bp->gears = 0;
+      bp->ngears = 0;
+    }
 
   if (!(random() % 8))
     {
@@ -784,10 +757,11 @@ init_gears (ModeInfo *mi)
     {
       gear *g = 0;
       int total_gears = MI_COUNT (mi);
-      int i;
-      if (total_gears <= 0)
-        total_gears = 3 + abs (BELLRAND (8) - 4);  /* 3 - 7, mostly 3. */
 
+      bp->planetary_p = False;
+
+      if (total_gears <= 0)
+        total_gears = 3 + fabs (BELLRAND (8) - 4);  /* 3 - 7, mostly 3. */
       bp->gears = (gear **) calloc (total_gears+2, sizeof(**bp->gears));
       bp->ngears = 0;
 
@@ -934,6 +908,24 @@ draw_gears (ModeInfo *mi)
   glXSwapBuffers(dpy, window);
 }
 
+ENTRYPOINT Bool
+gears_handle_event (ModeInfo *mi, XEvent *event)
+{
+  gears_configuration *bp = &bps[MI_SCREEN(mi)];
+
+  if (gltrackball_event_handler (event, bp->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &bp->button_down_p))
+    return True;
+  else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event))
+    {
+      init_gears (mi);
+      return True;
+    }
+
+  return False;
+}
+
 XSCREENSAVER_MODULE ("Gears", gears)
 
 #endif /* USE_GL */