RopeGame.java

/*
 *	Author:      Clément Petit
 *	Date:        15.10.2015
 */

package ch.epfl.cs107.play.game.tutorial;

import java.awt.Color; 

import ch.epfl.cs107.play.game.Game;
import ch.epfl.cs107.play.game.actor.ImageGraphics;
import ch.epfl.cs107.play.game.actor.ShapeGraphics;
import ch.epfl.cs107.play.io.FileSystem;
import ch.epfl.cs107.play.math.Circle;
import ch.epfl.cs107.play.math.Entity;
import ch.epfl.cs107.play.math.EntityBuilder;
import ch.epfl.cs107.play.math.PartBuilder;
import ch.epfl.cs107.play.math.Polygon;
import ch.epfl.cs107.play.math.RopeConstraintBuilder;
import ch.epfl.cs107.play.math.Transform;
import ch.epfl.cs107.play.math.Vector;
import ch.epfl.cs107.play.math.World;
import ch.epfl.cs107.play.window.Window;

public class RopeGame implements Game {
	
	private Window window;
	private World world;
	
	private Entity block;
	private Entity ball;
	
	private ImageGraphics blockGraphics;
    private ShapeGraphics ballGraphics;
	
    @Override
    public boolean begin(Window window, FileSystem fileSystem) {
        
        this.window = window;

        world = new World();
        world.setGravity(new Vector(0.0f, -9.81f));
        
        EntityBuilder entityBuilder;
        PartBuilder partBuilder;
        
        final float blockWidth = 1.0f;
        final float blockHeight = 1.0f;
        final float ballRadius = 0.6f;
        
     // builds block and sets it shape
        entityBuilder = world.createEntityBuilder();
        entityBuilder.setFixed(true);
        entityBuilder.setPosition(new Vector(1.0f, 0.5f));
        block = entityBuilder.build();

        partBuilder = block.createPartBuilder();
        Polygon polygon = new Polygon( new Vector(0.0f, 0.0f), new Vector(blockWidth, 0.0f), new Vector(blockWidth, blockHeight),
        new Vector(0.0f, blockHeight) );
        partBuilder.setShape(polygon);
        partBuilder.build();
        
     // builds ball and sets it shape
        entityBuilder = world.createEntityBuilder();
        entityBuilder.setFixed(false);
        entityBuilder.setPosition(new Vector(0.6f, 4.0f));
        ball = entityBuilder.build();
        
        partBuilder = ball.createPartBuilder();
        Circle circle = new Circle(ballRadius);
        partBuilder.setShape(circle);
        partBuilder.build();
        
     // image for block
        blockGraphics = new ImageGraphics("stone.broken.4.png", blockWidth, blockHeight);
        blockGraphics.setAlpha(1.0f);
        blockGraphics.setDepth(0.0f);
        blockGraphics.setParent(block);
        
     // image for ball
        ballGraphics = new ShapeGraphics(circle, Color.BLUE, Color.RED, .1f, 1.f, 0);
        ballGraphics.setAlpha(1.0f);
        ballGraphics.setDepth(0.0f);
        ballGraphics.setParent(ball);
        
        RopeConstraintBuilder ropeConstraintBuilder = world.createRopeConstraintBuilder();
        ropeConstraintBuilder.setFirstEntity(block);
        ropeConstraintBuilder.setFirstAnchor(new Vector(blockWidth/2, blockHeight/2));
        ropeConstraintBuilder.setSecondEntity(ball);
        ropeConstraintBuilder.setSecondAnchor(Vector.ZERO);
        ropeConstraintBuilder.setMaxLength(6.0f);
        ropeConstraintBuilder.setInternalCollision(false);
        ropeConstraintBuilder.build();
        return true;
    }
    
    @Override
    public void update(float deltaTime) {
        
    	world.update(deltaTime);
    	
    	window.setRelativeTransform(Transform.I.scaled(10.0f));

    	blockGraphics.draw(window);
    	ballGraphics.draw(window);

    }

    @Override
    public void end() {
    }

}