Obi-Wan the Cursor - amazing project with the MA

イメージ 1

イメージ 2

http://www.makezine.com/blog/archive/2006/10/obiwan_the_curs.html

Obi-Wan the Cursor - amazing project with the MAKE controller!

http://russnelson.com/obiwan-the-cursor.html

Obi-Wan the Cursor
I use four screens, and sometimes lose my cursor. No more! I have Obi-WanQui-Gon to point the way for me. Using the Makezine Controller, a small X program, OSC, and a pair of servo motors, I have a real-life cursor (2.4MB video).

The X program (included below) tracks the cursor, and ten times a second, sends an OSC (Open Sound Control) command using sendOSC to the controller. The commands work together like this:
~/src/servo | osc/sendOSC/sendOSC -h 192.168.0.200 10000

/* compile with this command:
cc servo.c -o servo -L/usr/X11R6/lib -lX11
*/
#include <stdio.h>
#include <X11/Xlib.h>

main(int argc, char *argv[])
{
Display *dpy = XOpenDisplay(NULL);
Window thiswindow;
Window root, child;
XEvent ev;
int x, y, oldx, oldy;
int junk;
unsigned int state;

thiswindow = DefaultRootWindow(dpy);
for(;;) {
XQueryPointer(dpy, thiswindow, &root, &child, &x,&y, &junk,&junk, &state);
if (oldx != x || oldy != y) {
printf("/servo/0/position %d\n/servo/1/position %d\n", x / 3, y * 1024 / 768);
fflush(stdout);
oldx = x;
oldy = y;
}
usleep(1000L * 1000L / 10);
}
}