[contiga]

Well, I don't know how to explain it, but I know how to use it I used it in my fireball script for example;

PHP Code:

function onCreated() {
  showCharacter();
  setCharAni( this.info[ 0], "");
  this.r_target = findPlayer( this.info[ 1]);
  this.r_moves = 0;
  moveIt();
}

function onMovementFinished() {
  if ( this.r_moves = 20) 
    destroy();
  if ( this.x in | this.r_target.x - 2.5, this.r_target.x + 2.5| && this.y in | this.r_target.y - 2.5, this.r_target.y + 2.5|) {
    triggerAction( this.r_target.x + 0.5, this.r_target.y + 0.5, "projectile", this.info[ 2]);
    destroy();
  }
  else
    moveIt();
}

function moveIt(){
  this.r_angle = getangle( this.r_target.x - this.x, this.r_target.y - this.y);
  move( cos( this.r_angle) * 5.5, - sin( this.r_angle) * 5.5, .4, 8);
  this.r_moves ++;
} 


It has to do with angles and stuff.. like sinus and tan also do.