CollisionManager.java

package vooga.fighter.util;

import java.awt.Rectangle;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;

import vooga.fighter.model.objects.AttackObject;
import vooga.fighter.model.objects.CharacterObject;
import vooga.fighter.model.objects.EnvironmentObject;
import vooga.fighter.model.objects.GameObject;
import vooga.fighter.model.objects.MapObject;
import vooga.fighter.model.objects.MenuObject;
import vooga.fighter.model.objects.MouseClickObject;


/**
 * Detects collisions between all the game objects. Collision handling is achieved
 * in the game objects themselves, and
 * 
 * @author James Wei, alanni
 * @modified Matthew Parides
 * @modified Jack Matteucci
 */
public class CollisionManager {

    CollisionDetector myCollisionDetector;

    public CollisionManager () {
        setCollisionDetector();
    }
    
    public void setCollisionDetector(){
    	myCollisionDetector = new CollisionDetector();
    }

    /**
     * Checks for collisions between the game objects.
     */
    public void checkCollisions (List<GameObject> myObjects) {
        for (int i = 0; i < myObjects.size() - 1; i++) {
            for (int j = i + 1; j < myObjects.size(); j++) {
                GameObject o1 = myObjects.get(i);
                GameObject o2 = myObjects.get(j);
                if (!(o1 instanceof MapObject || o2 instanceof MapObject)){
                	Rectangle o1Rect = o1.getCurrentState().getCurrentRectangle();
                	Rectangle o2Rect = o2.getCurrentState().getCurrentRectangle();
	                if (myCollisionDetector.quickDetectCollision(o1Rect, o2Rect)) {
	                    handleCollisions(o1, o2);
	                }
                }
            }
        }
    }

    /**
     * Delegates to specific collision methods based on the runtime type of our
     * colliding game objects using reflection.
     */
    public void handleCollisions (GameObject o1, GameObject o2) {
        try {
            Class<?>[] runtimeClasses = new Class[] { o1.getClass(), o2.getClass() };
            Object[] parameters = new Object[] { o1, o2 };
            Method method = this.getClass().getMethod("collide", runtimeClasses);
            method.invoke(this, parameters);
        }
        catch (InvocationTargetException e) {
        	e.printStackTrace();
        }
        catch (Exception e) {
        	
        }
    }


    /**
     * Handles collisions between two attack objects.
     * 
     */
    public void collide (AttackObject o1, AttackObject o2) {

    }

    /**
     * Handles collisions between a character object and an attack object.
     * Destroys object on collision with character object
     */
    public void collide (CharacterObject o1, AttackObject o2) {
        collide(o2, o1);
    }

    /**
     * Handles collisions between an attack object and a character object.
     */
    public void collide (AttackObject o1, CharacterObject o2) {
        if (!o1.getOwner().equals(o2)) {
        	o1.inflictDamage(o2);
            o1.addTargetForEffects(o2);
        }
    }

    /**
     * Handles collisions between an environment object and an attack object.
     */
    public void collide (EnvironmentObject o1, AttackObject o2) {
    	collide(o2, o1);
    }

    /**
     * Handles collisions between an attack object and an environment object.
     */
    public void collide (AttackObject o1, EnvironmentObject o2) {
        o1.endCounter();
    }

    /**
     * Handles collisions between a character object and an environment object.
     */
    public void collide (CharacterObject o1, EnvironmentObject o2) {
        collide(o2, o1);
    }

    /**
     * Handles collisions between an environment object and a character object.
     */
    public void collide (EnvironmentObject o1, CharacterObject o2) {
        Rectangle o1Rect = o1.getCurrentState().getCurrentRectangle();
        Rectangle o2Rect = o2.getCurrentState().getCurrentRectangle();
        if (myCollisionDetector.hitBottom(o2Rect, o1Rect)) {
            o2.moveBack();
        }
    }

    /**
     * Handles collisions between a Menu object and an MouseClick object.
     */
    public void collide (MenuObject o1, MouseClickObject o2) {
        o1.tellDelegate();
    }

    /**
     * Handles collisions between an MouseClick object and a Menu object.
     */
    public void collide (MouseClickObject o1, MenuObject o2) {
        o2.tellDelegate();
    }

}