gistfile1.java

package lib;
 
import org.newdawn.slick.*;
import org.newdawn.slick.state.*;
 
public class Play extends BasicGameState {
 
	Animation Player, movingLeft, movingRight, notMoving, notMoving1;
	Image worldMap;
	boolean quit = false;
	boolean isJumping = false;
	int[] duration = { 200, 200, 200, 200, 200, 200, 200 };
 
	float playerPositionX = 0;
	float playerPositionY = 0;
	float shiftX = playerPositionX + 384;
	float shiftY = playerPositionY + 384;
 
	//gameplay constants, adjust these to get desired behaviour
	final float JUMP_VELOCITY = 20.0f;
	final float JUMP_BOOST = 1.0f;
	final float GRAVITY = 10.0f;
	
	float velocityY = 0;
 
	public Play(int state) {
 
	}
 
	public void init(GameContainer gc, StateBasedGame sbg)
			throws SlickException {
		worldMap = new Image("res/worldMap.png");
		Image[] walkLeft = { new Image("res/playerL1.png"),
				new Image("res/playerL2.png"), new Image("res/playerL3.png"),
				new Image("res/playerL4.png"), new Image("res/playerL5.png"),
				new Image("res/playerL6.png"), new Image("res/playerL7.png") };
		Image[] walkRight = { new Image("res/playerR1.png"),
				new Image("res/playerR2.png"), new Image("res/playerR3.png"),
				new Image("res/playerR4.png"), new Image("res/playerR5.png"),
				new Image("res/playerR6.png"), new Image("res/playerR7.png") };
		Image[] stopWalking = { new Image("res/playerR1.png"),
				new Image("res/playerR1.png"), new Image("res/playerR1.png"),
				new Image("res/playerR1.png"), new Image("res/playerR1.png"),
				new Image("res/playerR1.png"), new Image("res/playerR1.png") };
		Image[] stopWalking1 = { new Image("res/playerL1.png"),
				new Image("res/playerL1.png"), new Image("res/playerL1.png"),
				new Image("res/playerL1.png"), new Image("res/playerL1.png"),
				new Image("res/playerL1.png"), new Image("res/playerL1.png") };
		movingLeft = new Animation(walkLeft, duration, false);
		movingRight = new Animation(walkRight, duration, false);
		notMoving = new Animation(stopWalking, duration, false);
		notMoving1 = new Animation(stopWalking1, duration, false);
		Player = notMoving;
 
	}
 
	public void render(GameContainer gc, StateBasedGame sbg, Graphics g)
			throws SlickException {
		worldMap.draw(playerPositionX, playerPositionY);
		Player.draw(shiftX, shiftY);
 
		if (quit == true) {
			g.drawString("Resume (R)", 250, 100);
			g.drawString("Main Menu (M)", 250, 150);
			g.drawString("Quit Game (Q)", 250, 200);
			if (quit == false) {
				g.clear();
			}
		}
	}
 
	public void update(GameContainer gc, StateBasedGame sbg, int delta)
			throws SlickException {
		Player.update(delta);
		Input input = gc.getInput();
		String lastKeyPressed = null;
 
		if (input.isKeyDown(Input.KEY_W)) {
			if (!isJumping) {
				velocityY = JUMP_VELOCITY;
				isJumping = true;
				playerPositionY += velocityY*delta * .1f;
			} else if (velocityY > 0) { //this means you jump higher if you continue to press w while jumping
				velocityY += delta*JUMP_BOOST;
			}
			
		}
		
		if (isJumping) {
			playerPositionY += velocityY * .1f;
			velocityY -= delta*GRAVITY;
			
			if (playerPositionY < 0.0f) { //this checks for collision with the ground
				isJumping = false;
				playerPositionY = 0.0f;
			}
		}
 
		if (input.isKeyDown(Input.KEY_A)) {
			Player = movingLeft;
			playerPositionX += delta * .1f;
			lastKeyPressed = "A";
		}
 
		if (input.isKeyDown(Input.KEY_D)) {
			Player = movingRight;
			playerPositionX -= delta * .1f;
			lastKeyPressed = "D";
		}
 
		if ((lastKeyPressed == "A")
				&& (!input.isKeyDown(Input.KEY_A) && (!input
						.isKeyDown(Input.KEY_D)))) {
			Player = notMoving1;
		}
 
		if ((lastKeyPressed == "D")
				&& (!input.isKeyDown(Input.KEY_A) && (!input
						.isKeyDown(Input.KEY_D)))) {
			Player = notMoving;
		}
 
		if (input.isKeyDown(Input.KEY_ESCAPE)) {
			quit = true;
		}
 
		if (quit == true) {
			if (input.isKeyDown(Input.KEY_R)) {
				quit = false;
			}
			if (input.isKeyDown(Input.KEY_M)) {
				sbg.enterState(0);
			}
			if (input.isKeyDown(Input.KEY_Q)) {
				System.exit(0);
			}
		}
	}
 
	public int getID() {
		return 1;
	}
 
}