keyboard_control_babylon.js

enum Direction  {UP,DOWN,RIGHT,LEFT};
document.onkeydown =(e)=>{
  if(e.keyCode == 32){//SPACE
    console.log("Game start!");
    startGame();
  }else if (e.keyCode == 87){ //UP
    moveSnake(Direction.UP);
  }else if (e.keyCode ==83){ //DOWN
    moveSnake(Direction.DOWN);
  }else if (e.keyCode ==68){ //RIGHT
    moveSnake(Direction.RIGHT);
  }else if (e.keyCode ==65){ //LEFT
    moveSnake(Direction.LEFT);
  }
}
function moveSnake(snakeStep:Direction){
  var x,y,z:number;
  if(snakeStep ==Direction.UP){
    x=y=0, z=1;
  }else if (snakeStep==Direction.DOWN){
    x=y=0, z=-1;
  }else if (snakeStep==Direction.RIGHT){
    x=1,y=z=0;
  }else if (snakeStep=Direction.LEFT){
    x=-1,y,z=0;
  }
  snake.translate( new Vector3(x,y,z),6,Space.WORLD);
}