From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / hacks / glx / glhanoi.c

diff --git a/hacks/glx/glhanoi.c b/hacks/glx/glhanoi.c
index f9bc6fe0d2aef93a6194938d7dfdf0f681eb003c..6f52b3a1014e9f768dfb3cfaed5a24c4610e0c84 100644 (file)
--- a/hacks/glx/glhanoi.c
+++ b/hacks/glx/glhanoi.c
@@ -345,7 +345,7 @@ static void moveSetup(glhcfg *glhanoi, Disk * disk)
        int dst = glhanoi->dst;
        GLfloat theta;
        GLfloat sintheta, costheta;
-       double absx, dh;
+       double dh;
        double dx, dz; /* total x and z distances from src to dst */
        Pole *poleSrc, *poleDst;
 
@@ -385,7 +385,7 @@ static void moveSetup(glhcfg *glhanoi, Disk * disk)
        /* horizontal distance to travel? */
        /* was: absx = sqrt(disk->xmax - disk->xmin); */
        dh = distance(poleSrc->position, poleDst->position);
-       absx = sqrt(dh);
+       /* absx = sqrt(dh); */
        ymax = glhanoi->poleHeight + dh;
        if(glhanoi->state == FINISHED) {
                ymax += dh * (double)(glhanoi->numberOfDisks - disk->id);
@@ -888,7 +888,6 @@ static int drawTube(GLdouble bottomRadius, GLdouble topRadius,
        GLint lastSlice = nSlice - 1;
        GLfloat radius;
        GLfloat innerRadius;
-       GLfloat maxRadius;
 
        if(bottomThickness > bottomRadius) {
                bottomThickness = bottomRadius;
@@ -902,11 +901,11 @@ static int drawTube(GLdouble bottomRadius, GLdouble topRadius,
        if(topThickness < 0.0) {
                topThickness = 0.0;
        }
-       if(topRadius >= bottomRadius) {
+/*     if(topRadius >= bottomRadius) {
                maxRadius = topRadius;
        } else {
                maxRadius = bottomRadius;
-       }
+       } */
 
        /* bottom */
        y = 0.0;
@@ -1968,6 +1967,15 @@ ENTRYPOINT void draw_glhanoi(ModeInfo * mi)
        update_glhanoi(glhanoi);
        updateView(glhanoi);
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+    {
+      GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+      int o = (int) current_device_rotation();
+      if (o != 0 && o != 180 && o != -180)
+        glScalef (1/h, 1/h, 1/h);
+    }
+# endif
+
        if(!glhanoi->wire && glhanoi->texture) {
                glEnable(GL_TEXTURE_2D);
        }
@@ -1994,6 +2002,8 @@ ENTRYPOINT Bool glhanoi_handle_event(ModeInfo * mi, XEvent * event)
 {
        glhcfg *glhanoi = &glhanoi_cfg[MI_SCREEN(mi)];
 
+    /* #### this is all wrong on iOS -- should be using gltrackball. */
+
        if(event->xany.type == ButtonPress && event->xbutton.button == Button1) {
                glhanoi->button_down_p = True;
                glhanoi->drag_x = event->xbutton.x;