Hello, I’ve been tinkering around with JME for a while, and I’ve only just recently started interacting on the forums. I’ve been coding a simple rock-paper-scissors game to get familiar with the engine and although I think it’s pretty “okay” as is, I am well aware that it could use improvement. the question that I want to ask is how can I update my code to use the AppState class as described in the tutorials? Should I go back and re-read them? if so, which page goes over using appstates in projects?
My code is down below. I used simple MS Paint drawings for all of the textures.
RPS_Game.java:
package rock_paper_scissors;
import com.jme3.app.SimpleApplication;
import com.jme3.font.BitmapText;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.material.Material;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Geometry;
import com.jme3.scene.shape.Box;
import com.jme3.texture.Texture;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
public class RPS_Game extends SimpleApplication
{
private RPS_Game.Choice playerChoice;
private RPS_Game.Choice computerChoice;
private final Player player = new Player("Player");
private final Player computer = new Player("Computer");
private Geometry playerCube;
private Geometry computerCube;
Random rng = new Random();
private int computerChoiceSelection;
public static void main(String[] args)
{
RPS_Game game = new RPS_Game();
game.start();
}
@Override
public void simpleInitApp()
{
playerCube = initDisplayCube(player.getName());
playerCube.move(-2f, 0f, 0f);
computerCube = initDisplayCube(computer.getName());
computerCube.move(2f, 0f, 0f);
initHUD(player, computer);
initKeys();
rootNode.attachChild(playerCube);
rootNode.attachChild(computerCube);
}
@Override
public void simpleUpdate(float tpf)
{
if(playerChoice != null)
{
computerChoiceSelection = (rng.nextInt(3) + 1);
switch(computerChoiceSelection)
{
case 1:
computerChoice = Choice.ROCK;
computerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Rock.png"));
break;
case 2:
computerChoice = Choice.PAPER;
computerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Paper.png"));
break;
case 3:
computerChoice = Choice.SCISSORS;
computerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Scissors.png"));
break;
}
switch(RPS_Game.CompareChoices(playerChoice, computerChoice))
{
case WON:
player.incrementScore();
System.out.println("player's score +1");
System.out.println("Player: " + player.getScore());
System.out.println("Computer: " + computer.getScore());
break;
case LOST:
computer.incrementScore();
System.out.println("computer's score +1");
System.out.println("Player: " + player.getScore());
System.out.println("Computer: " + computer.getScore());
break;
}
initHUD(player, computer);
computerChoice = null;
playerChoice = null;
}
else
{
try {
Thread.sleep(2000);
} catch (InterruptedException ex) {
Logger.getLogger(RPS_Game.class.getName()).log(Level.SEVERE, null, ex);
}
computerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/modern.jpg"));
playerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/modern.jpg"));
}
}
@Override
public void simpleRender(RenderManager rm)
{
}
//This method initializes the heads-up display
public void initHUD(Player thePlayer, Player theComputer)
{
/** Write text on the screen (HUD) */
guiNode.detachAllChildren();
guiFont = assetManager.loadFont("Interface/Fonts/Default.fnt");
BitmapText playerData = new BitmapText(guiFont, false);
playerData.setSize(guiFont.getCharSet().getRenderedSize());
playerData.setText(thePlayer.getName() + ": " + thePlayer.getScore());
playerData.setLocalTranslation(10, settings.getHeight() - 10, 0);
guiNode.attachChild(playerData);
BitmapText computerData = new BitmapText(guiFont, false);
computerData.setSize(guiFont.getCharSet().getRenderedSize());
computerData.setText(theComputer.getName() + ": " + theComputer.getScore());
computerData.setLocalTranslation(settings.getWidth() - (computerData.getLineWidth()+ 10), settings.getHeight() - 10, 0);
guiNode.attachChild(computerData);
}
//This method maps the A, S, and D keys to set the player's choice to
//Rock, Paper, or Scissors
private void initKeys()
{
flyCam.setEnabled(false);
inputManager.addMapping("Rock", new KeyTrigger(KeyInput.KEY_A));
inputManager.addMapping("Paper", new KeyTrigger(KeyInput.KEY_S));
inputManager.addMapping("Scissors", new KeyTrigger(KeyInput.KEY_D));
inputManager.addListener(actionListener,"Rock", "Paper", "Scissors");
}
private final ActionListener actionListener = new ActionListener()
{
@Override
public void onAction(String name, boolean keyPressed, float tpf)
{
if (name.equals("Rock") && !keyPressed)
{
playerChoice = Choice.ROCK;
playerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Rock.png"));
}
if (name.equals("Paper") && !keyPressed)
{
playerChoice = Choice.PAPER;
playerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Paper.png"));
}
if (name.equals("Scissors") && !keyPressed)
{
playerChoice = Choice.SCISSORS;
playerCube.getMaterial().getTextureParam("ColorMap").setTextureValue(assetManager.loadTexture("Textures/Scissors.png"));
}
}
};
public Geometry initDisplayCube(String playerName)
{
Box playerMesh = new Box(1, 1, 1);
Geometry tempCube = new Geometry("playerName" + " Box", playerMesh);
Texture defaultTex = assetManager.loadTexture("Textures/modern.jpg");
Material playerMat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
playerMat.setTexture("ColorMap", defaultTex);
tempCube.setMaterial(playerMat);
return tempCube;
}
/**
*
* @param player
* @param computer
* @return
*/
public static RPS_Game.Result CompareChoices(RPS_Game.Choice player, RPS_Game.Choice computer)
{
RPS_Game.Result result;
if(player == RPS_Game.Choice.ROCK && computer == RPS_Game.Choice.SCISSORS)
result = RPS_Game.Result.WON;
else if(player == RPS_Game.Choice.PAPER && computer == RPS_Game.Choice.ROCK)
result = RPS_Game.Result.WON;
else if (player == RPS_Game.Choice.SCISSORS && computer == RPS_Game.Choice.PAPER)
result = RPS_Game.Result.WON;
else if (player == RPS_Game.Choice.ROCK && computer == RPS_Game.Choice.PAPER)
result = RPS_Game.Result.LOST;
else if(player == RPS_Game.Choice.PAPER && computer == RPS_Game.Choice.SCISSORS)
result = RPS_Game.Result.LOST;
else if(player == RPS_Game.Choice.SCISSORS && computer == RPS_Game.Choice.ROCK)
result = RPS_Game.Result.LOST;
else
result = RPS_Game.Result.TIED;
return result;
}
public enum Choice
{
ROCK, PAPER, SCISSORS
}
public enum Result
{
WON, LOST, TIED
}
}
Player.java:
package rock_paper_scissors;
public class Player
{
private String name;
private int score;
public Player()
{
name = "";
score = 0;
}
public Player(String name)
{
this.name = name;
score = 0;
}
protected void incrementScore()
{
score++;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getScore()
{
return score;
}
public void setScore(int score)
{
this.score = score;
}
}
).