Space Game

[Er1c]

I am planning on making a completely space-based game (like Cosmic Rift or Starship Troopers (Cosmic Rift is going P2P and Starship Troopers went out of business)), but I really can't think of a way to make the movement work correctly with my limited math knowledge. I'll attach a level with what I have of the movement system so far, and also paste the code below.

NPC Code:

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//#CLIENTSIDE

if (created) {

  disabledefmovement;

  showstats 0;

  this.speed = 0;

  this.dir   = 0;

}

if (playerenters || timeout) {

//all

  PI = 3.1415926535897932384626433832795;

  this.rotatespeed      = 0.1;

//normal

  this.maxspeed         = 1;

  this.thrustspeed      = 0.05;

  this.turnspeed        = 0.07;

//hyper

  this.hypermaxspeed    = 1.3;

  this.hyperthrustspeed = 0.1;

  this.hyperturnspeed   = 0.02;



  if (keydown(1))

    this.dir = (this.dir+this.rotatespeed)%(PI*2);

  if (keydown(3))

    this.dir = (this.dir-this.rotatespeed)%(PI*2);



  if (keydown(0) || keydown(2)) {

    newspeed = this.speed+this.thrustspeed*(keydown(0)-keydown(2));

    if (newspeed in <this.maxspeed*-1,this.maxspeed>) {

      this.speed = newspeed;

    }

    this.angle = this.dir;

  }

  playerx += sin(this.angle)*this.speed;

  playery += cos(this.angle)*this.speed;

  for (i = 0;i<3;i++) {

    showimg 200+i,@tempus sans itc@c@.,playerx+sin(this.dir)*(i*2),playery+cos(th  is.dir)*(i*2);

    changeimgcolors 200+i,0,0,2,.99;

    changeimgvis 200+i,3;

  }

temp();

  timeout = .05;

}

function temp() {

  if (keydown(5)) this.dir = (this.dir+PI)%(PI*2);

  showimg 0,@#v(sin(this.angle)),10,50;

  showimg 1,@#v(sin(this.dir)),10,70;

  showimg 2,@#v(cos(this.angle)),10,90;

  showimg 3,@#v(cos(this.dir)),10,110;

  for (i = 0;i<50;i++)

    changeimgvis i,4;

}

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