Code in frame 1 layer 1

init();



function init(){

  gun.dir = 0;

  gun.charge = 0;

  bullet.dir = 0;

  bullet.speed = 0;

  gravity = 1;



}



_root.onEnterFrame = function(){

  followMouse();

  move(bullet);

} // end enterFrame



function followMouse(){

  //calculate gun's direction based on it's relationship to

  //the mouse

  

  dx = _root._xmouse - gun._x;

  dy = _root._ymouse - gun._y;

  radians = Math.atan(dy/dx);

  degrees = radians * 180 / Math.PI;

  degrees += 90;

  if (dx <0) {

    degrees -=180;

  } // end if

  gun.dir = degrees;

  gun._rotation = degrees;

  



  //charge is distance from gun to mouse divided by 10

  distance = Math.sqrt(dx*dx + dy*dy);

  gun.charge = distance / 10;



} // end followMouse



_root.onMouseUp = function(){

    //move the bullet

    bullet._x = gun._x;

    bullet._y = gun._y;



    bullet.dir = gun.dir;

    bullet.speed = gun.charge;

    turn(bullet);

} // end mouseUp



function turn(sprite){

  //use vector projection to get DX and DY



  //offset the angle

  degrees = sprite.dir -90;



  //convert to radians

  radians = degrees / 180 * Math.PI;



  //get DX and DY (normalized: length is one)

  sprite.dx = Math.cos(radians);

  sprite.dy = Math.sin(radians);



  //compensate for speed

  sprite.dx *= sprite.speed;

  sprite.dy *= sprite.speed;

} // end turn;  



function move(sprite){

  //moves an object.  Kills it if it moves off stage



  sprite._x += sprite.dx;

  sprite._y += sprite.dy;



  if ((sprite._x > Stage.width) ||

      (sprite._x < 0) ||

      (sprite._y > Stage.height) ||

      (sprite._y < 0)){

    //stop sprite and move it off stage

    sprite._x = -100;

    sprite._y = -100;

    sprite._speed = 0;

  } //end if



  //incorporate gravity

  sprite.dy += gravity;

} // end move