User Interface Event Handlers – Talk

The values returned by the "onMouseMoving" event of a display are most probably not "some kind of x and y delta position" but rotation angles. Treating these values as azimuth and elevation and applying them to, let's say, a camera results in a perfectly smooth camera movement:

mycam = "camera" camCreate (player modelToWorld [0, -5, 3]);
mycam setDir getDir player;
mycam cameraEffect ["INTERNAL", "BACK"];
showCinemaBorder false;
ax = 0;
ay = getDir player;
myhandler = '
  ax = ax + (_this select 2);
  ay = ay + (_this select 1);
  _cx = cos -ax; _cy = cos -ay;
  _sx = sin -ax; _sy = sin -ay;
  mycam setVectorDirAndUp [
    [_cx * -_sy,  _cx * _cy, _sx],
    [_sx *  _sy, -_sx * _cy, _cx]
  ];
';
(findDisplay 46) displayAddEventHandler ["MouseMoving", myhandler];

Worldeater 20:55, 10 October 2010 (CEST)