-/* gltrackball, Copyright (c) 2002, 2005 Jamie Zawinski <jwz@jwz.org>
+/* gltrackball, Copyright (c) 2002-2012 Jamie Zawinski <jwz@jwz.org>
* GL-flavored wrapper for trackball.c
*
* Permission to use, copy, modify, distribute, and sell this software and its
#include <math.h>
#include <stdlib.h>
+#include <string.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
-#ifdef HAVE_COCOA
-# include <OpenGL/gl.h>
-#else
+#ifndef HAVE_COCOA
# include <GL/gl.h>
#endif
+#ifdef HAVE_JWZGLES
+# include "jwzgles.h"
+#endif /* HAVE_JWZGLES */
+
#include "trackball.h"
#include "gltrackball.h"
+extern double current_device_rotation (void); /* Bah, it's in fps.h */
+
struct trackball_state {
int x, y;
GLfloat q[4];
return ts;
}
+/* Reset the trackball to the default unrotated state.
+ */
+void
+gltrackball_reset (trackball_state *ts)
+{
+ memset (ts, 0, sizeof(*ts));
+ trackball (ts->q, 0, 0, 0, 0);
+}
+
+
/* Begin tracking the mouse: Call this when the mouse button goes down.
x and y are the mouse position relative to the window.
w and h are the size of the window.
# define Button4 4 /* X11/Xlib.h */
# define Button5 5
+# define Button6 6
+# define Button7 7
/* Call this when a mouse-wheel click is detected.
Clicks act like horizontal or vertical drags.
Percent is the length of the drag as a percentage of the screen size.
- Button is 'Button4' or 'Button5'.
+ Button is 'Button4' or 'Button5' (for the vertical wheel)
+ or 'Button5' or 'Button6' (for the horizontal wheel).
+ If `flip_p' is true, swap the horizontal and vertical axes.
*/
void
gltrackball_mousewheel (trackball_state *ts,
- int button, int percent, int horizontal_p)
+ int button, int percent, int flip_p)
{
int up_p;
- double move;
+ int horizontal_p;
+ int mx, my, move, scale;
+
+#ifdef HAVE_COCOA
+ flip_p = 0; /* MacOS has already handled this. */
+#endif
+
switch (button) {
- case Button4: up_p = 1; break;
- case Button5: up_p = 0; break;
+ case Button4: up_p = 1; horizontal_p = 0; break;
+ case Button5: up_p = 0; horizontal_p = 0; break;
+ case Button6: up_p = 1; horizontal_p = 1; break;
+ case Button7: up_p = 0; horizontal_p = 1; break;
default: abort(); break;
}
- if (horizontal_p) up_p = !up_p;
+ if (flip_p)
+ {
+ horizontal_p = !horizontal_p;
+ up_p = !up_p;
+ }
+ scale = mx = my = 1000;
move = (up_p
- ? 1.0 - (percent / 100.0)
- : 1.0 + (percent / 100.0));
-
- gltrackball_start (ts, 50, 50, 100, 100);
- if (horizontal_p)
- gltrackball_track (ts, 50*move, 50, 100, 100);
- else
- gltrackball_track (ts, 50, 50*move, 100, 100);
+ ? floor (scale * (1.0 - (percent / 100.0)))
+ : ceil (scale * (1.0 + (percent / 100.0))));
+ if (horizontal_p) mx = move;
+ else my = move;
+ gltrackball_start (ts, scale, scale, scale*2, scale*2);
+ gltrackball_track (ts, mx, my, scale*2, scale*2);
}
void