From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / glx / glforestfire.c

diff --git a/hacks/glx/glforestfire.c b/hacks/glx/glforestfire.c
index 6b365ad17be14162935fe0dce5bce439782b1030..5ee4c0b97f333b9371ccecf007a2c577d99f539c 100644 (file)
--- a/hacks/glx/glforestfire.c
+++ b/hacks/glx/glforestfire.c
@@ -81,7 +81,6 @@ static const char sccsid[] = "@(#)fire.c      5.02 2001/09/26 xlockmore";
                "*showFPS:    False \n" \
                "*wireframe:  False \n" \
 
-# define refresh_fire 0
 #define MODE_fire
 #include "xlockmore.h"         /* from the xscreensaver distribution */
 #include "gltrackball.h"
@@ -621,13 +620,15 @@ static Bool inittree(ModeInfo * mi)
                return False;
     }
     /* initialise positions */
-    for(i=0;i<fs->num_trees;i++)
-       do {
-           fs->treepos[i].x =vrnd()*TREEOUTR*2.0-TREEOUTR;
-           fs->treepos[i].y =0.0;
-           fs->treepos[i].z =vrnd()*TREEOUTR*2.0-TREEOUTR;
-           dist=sqrt(fs->treepos[i].x *fs->treepos[i].x +fs->treepos[i].z *fs->treepos[i].z );
-        } while((dist<TREEINR) || (dist>TREEOUTR));
+    for(i=0;i<fs->num_trees;i++) {
+      do {
+        fs->treepos[i].x =vrnd()*TREEOUTR*2.0-TREEOUTR;
+        fs->treepos[i].y =0.0;
+        fs->treepos[i].z =vrnd()*TREEOUTR*2.0-TREEOUTR;
+        dist = sqrt(fs->treepos[i].x * fs->treepos[i].x +
+                    fs->treepos[i].z * fs->treepos[i].z);
+      } while((dist<TREEINR) || (dist>TREEOUTR));
+    }
        return True;
 }
 
@@ -853,23 +854,6 @@ static Bool Init(ModeInfo * mi)
                       fs->eject_r, fs->ridtri);
     }
 
-    glShadeModel(GL_FLAT);
-    glEnable(GL_DEPTH_TEST);
-
-    /* makes particles blend with background */
-    if (!MI_IS_WIREFRAME(mi)||(!fs->np))
-    {
-       glEnable(GL_BLEND);
-       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    }
-
-    /* fog stuff */
-    glEnable(GL_FOG);
-    glFogi(GL_FOG_MODE, GL_EXP);
-    glFogfv(GL_FOG_COLOR, fogcolor);
-    glFogf(GL_FOG_DENSITY, 0.03);
-    glHint(GL_FOG_HINT, GL_NICEST);
-
     /* initialise particles and trees */
     for (i = 0; i < fs->np; i++) {
        setnewpart(fs, &(fs->p[i]));
@@ -902,9 +886,11 @@ static Bool Init(ModeInfo * mi)
  */
 
 
-static void
-free_fire(firestruct *fs)
+ENTRYPOINT void
+free_fire(ModeInfo * mi)
 {
+       firestruct *fs = &fire[MI_SCREEN(mi)];
+
        if (mode_font != None && fs->fontbase != None) {
                glDeleteLists(fs->fontbase, mode_font->max_char_or_byte2 -
                        mode_font->min_char_or_byte2 + 1);
@@ -946,14 +932,7 @@ init_fire(ModeInfo * mi)
 {
     firestruct *fs;
 
-    /* allocate the main fire table if needed */
-    if (fire == NULL) {
-       if ((fire = (firestruct *) calloc(MI_NUM_SCREENS(mi),
-                                         sizeof(firestruct))) == NULL)
-           return;
-    }
-
-    /* initialise the per screen fire structure */
+    MI_INIT (mi, fire);
     fs = &fire[MI_SCREEN(mi)];
     fs->np = MI_COUNT(mi);
     fs->fog = do_fog;
@@ -961,14 +940,14 @@ init_fire(ModeInfo * mi)
     /* initialise fire particles if any */
     if ((fs->np)&&(fs->p == NULL)) {
        if ((fs->p = (part *) calloc(fs->np, sizeof(part))) == NULL) {
-           free_fire(fs);
+           free_fire(mi);
            return;
        }
     }
     else if (fs->r == NULL) {
         /* initialise rain particles if no fire particles */
        if ((fs->r = (rain *) calloc(NUMPART, sizeof(part))) == NULL) {
-           free_fire(fs);
+           free_fire(mi);
            return;
        }
     }
@@ -979,7 +958,7 @@ init_fire(ModeInfo * mi)
     else
        fs->num_trees = 0;
 
-    fs->trackball = gltrackball_init ();
+    fs->trackball = gltrackball_init (False);
 
     /* xlock GL stuff */
     if ((fs->glx_context = init_GL(mi)) != NULL) {
@@ -991,7 +970,7 @@ init_fire(ModeInfo * mi)
 #endif
        glDrawBuffer(GL_BACK);
        if (!Init(mi)) {
-               free_fire(fs);
+               free_fire(mi);
                return;
        }
     } else {
@@ -1017,7 +996,28 @@ ENTRYPOINT void draw_fire(ModeInfo * mi)
        return;
 
     glXMakeCurrent(display, window, *(fs->glx_context));
+
+    glShadeModel(GL_FLAT);
+    glEnable(GL_DEPTH_TEST);
+
+    /* makes particles blend with background */
+    if (!MI_IS_WIREFRAME(mi)||(!fs->np))
+    {
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    }
+
+    /* fog stuff */
+    glEnable(GL_FOG);
+    glFogi(GL_FOG_MODE, GL_EXP);
+    glFogfv(GL_FOG_COLOR, fogcolor);
+    glFogf(GL_FOG_DENSITY, 0.03);
+    glHint(GL_FOG_HINT, GL_NICEST);
+
+    glPushMatrix();
+    glRotatef(current_device_rotation(), 0, 0, 1);
     DrawFire(mi);
+    glPopMatrix();
 #ifndef STANDALONE
     Reshape(mi); /* xlock mode */
 #else
@@ -1039,13 +1039,6 @@ ENTRYPOINT void draw_fire(ModeInfo * mi)
 
 ENTRYPOINT void release_fire(ModeInfo * mi)
 {
-    if (fire != NULL) {
-    int screen;
-       for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
-               free_fire(&fire[screen]);
-       (void) free((void *) fire);
-       fire = (firestruct *) NULL;
-    }
     if (mode_font != None)
     {
        /* only free-ed when there are no more screens used */
@@ -1060,43 +1053,10 @@ fire_handle_event (ModeInfo *mi, XEvent *event)
 {
   firestruct *fs = &fire[MI_SCREEN(mi)];
 
-  if (event->xany.type == ButtonPress &&
-      event->xbutton.button == Button1)
-    {
-      fs->button_down_p = True;
-      event->xbutton.x = MI_WIDTH(mi)  - event->xbutton.x; /* kludge! */
-      event->xbutton.y = MI_HEIGHT(mi) - event->xbutton.y;
-      gltrackball_start (fs->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)
-    {
-      fs->button_down_p = False;
-      return True;
-    }
-  else if (event->xany.type == ButtonPress &&
-           (event->xbutton.button == Button4 ||
-            event->xbutton.button == Button5 ||
-            event->xbutton.button == Button6 ||
-            event->xbutton.button == Button7))
-    {
-      gltrackball_mousewheel (fs->trackball, event->xbutton.button, 5,
-                              !!event->xbutton.state);
-      return True;
-    }
-  else if (event->xany.type == MotionNotify &&
-           fs->button_down_p)
-    {
-      event->xmotion.x = MI_WIDTH(mi)  - event->xmotion.x; /* kludge! */
-      event->xmotion.y = MI_HEIGHT(mi) - event->xmotion.y;
-      gltrackball_track (fs->trackball,
-                         event->xmotion.x, event->xmotion.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
+  if (gltrackball_event_handler (event, fs->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &fs->button_down_p))
+    return True;
 
   return False;
 }