Bomberman MiniGame

Welcome to the Bomberman Minigame Tutorial!

Intro:

BomberMan is a multiplayer game (usually 4 players). Each player can drop bombs that can destroy the grey pillars making a path to other players. The objective of the game is to eliminate the other players with the exploding bombs. Power ups are also available when destroying pillars (increase of speed, explosion power and number of bombs allowed to place at a time).

Assets will be available for you to download and follow the tuto.

Since this game is meant to be multiplayer, we will be placing the GameObjects in NPCs for them to be visible to all the players. (more info on that here: Placing GameObjects in NPC)

First, we'll have the weapon that starts up the game and places the NPCs (found under weapon: Merlin/BomberMan/Game)

function onActionServerside(cmd, x, y) {
  if (cmd == "bomb") {
    temp.pnpc = putnpc2(x, y, "");
    temp.pnpc.join("merlin_bomberman_bomb");
  }
  if (cmd == "level") {
     temp.bombernpc = putnpc2(x, y, "");
     temp.bombernpc.join("merlin_bomberman_level");
  }
}

//#CLIENTSIDE
function onCreated() {
  echo(this.name @ " OnCreated");
  level.explosionpower = 4; //for powerups with explosion
  level.numberofbombs = 2; //number of bombs allowed to place at a time
}

public function Load() {
  echo(this.name @ " LOAD");
  Object::destroy(this.bomberManParentNode);
  if (isObject("bomberman_Quit")) {
    "bomberman_Quit".destroy();
  }
  new GuiButtonCtrl("bomberman_Quit") {
    profile = GuiBlueButtonProfile;
    x = 600;
    y = 200;
    width = 150;
    height = 30;
    text = "bombermanQuit";
  }

  temp.warpLevel = "only_ground.nw";
  temp.warpX = 4.65; 
  temp.warpY = 21.33; 
  temp.warpZ = 0.7; 
  WARPMANAGER.Warp(temp.warpX, temp.warpY ,temp.warpZ ,temp.warpLevel);
  sleep(0.5);
  start(); 
}

function bomberman_Quit.onAction() {
  BomberManQuit();
}

public function BomberManQuit() {
  if (isObject("bomberman_Quit")) {
    "bomberman_Quit".destroy();
  }
  PLAYERMOVEMENT.UnFreeze();
  PLAYERMOVEMENT.canJump = true;
  this.GAMEON = false;
}

function start() {
  PLAYERMOVEMENT.canJump = false;
  this.GAMEON = true;
  triggerserver("gui", this.name, "level", -60 , 14);
}

function onKeyPressed(keycode, keychar) {
  if (this.GAMEON == true) {
    if (keycode == "32, ,57") {
      DropBomb();
    }
  }
}

function DropBomb() {
  this.hit = RaycastHit::create();
  done = Physics::Raycast(player.gameobject.transform.position, Vector3::Down, this.hit, 100);
  sleep(0.05);
  triggerserver("gui", this.name, "bomb", this.hit.transform.gameobject.transform.position.x, this.hit.transform.gameobject.transform.position.z);
}

Here we trigger the server every time we want to place a GameObject.

In the function start, we trigger the server with the command "level" to load the bomberman map by placing an NPC and joining it with the class "merlin_bomberman_level".

Once we start the game, the player is not allowed to Jump: PLAYERMOVEMENT.canJump = false;

And pressing space will be used to drop a bomb, function onKeyPressed() checks if space is pressed and calls DropBomb().

New : RayCast

Think of RayCast as triggeraction() that triggers NPCs at given (x,y). Similarly, RayCast casts a ray given a position, a direction and a length, that detects colliders.

Raycast(Vector3 origin, Vector3 direction, float maxDistance = Mathf.Infinity, int layerMask = DefaultRaycastLayers, QueryTriggerInteraction queryTriggerInteraction = QueryTriggerInteraction.UseGlobal);

Returns: Boolean indicating if the RayCast hit a Collider.

(More info here: https://docs.unity3d.com/ScriptReference/Physics.Raycast.html)

Here, since the bomberman level is a grid and the floor is made of squares. We want the player to drop the bomb exactly in one square and not in between two. Therefore, when space is pressed, we RayCast with the PlayerGameObject as origin, with a Vector3::Down direction, this.hit as the output and 100 for length. The other parameters are kept at default.

This will return the collider of the GameObject underneath the player, which is the square tile.

We extract the tile's position from this.hit:

this.hit.transform.gameobject.transform.position.x

And we trigger the server, with the command "bomb" and the coordinates, to place a bomb NPC;

function onActionServerside(cmd, x, y) {
  if (cmd == "bomb") {
    temp.pnpc = putnpc2(x, y, "");
    temp.pnpc.join("merlin_bomberman_bomb");
  }
  if (cmd == "level") {
     temp.bombernpc = putnpc2(x, y, "");
     temp.bombernpc.join("merlin_bomberman_level");
  }
}