java完整2D游戏连载--part3 （地图人物物品栏类） - 黑马程序员技术交流社区

package project2;
/* 433-294 Object Oriented Software Development
* RPG Game Engine
* Sample Solution
* Author: weiqian wang<wangw>
*/
import org.newdawn.slick.Image;
import org.newdawn.slick.SlickException;
import Items.InventoryAccessory;
import Items.InventoryQuest;
import Items.InventoryWeapon;
import Items.WorldItem;
import Items.WorldQuest;
import Items.WorldWeapon;
import Monsters.Monster;
/** The character which the user plays as.
*/
public class Player extends Unit
{
// Pixels per millisecond
private static final double SPEED = 0.25;
// pick up range
private static final float pickupRange = 30;
/** Creates a new Player.
* @param image_path Path of player's image file.
*/
public Player()
throws SlickException
{
init(756,684);
// Start off at (756,684)
// Set the Player's avatar and physical size
this.avatar = new Image("assets/units/player.png");
this.physHeight = 37;
this.physWidth = 47;
//player's damage
this.strength = 26;
}
public void init(double ix,double iy){
this.x = ix;
this.y = iy;
// Give the player full health
this.health = this.getMaxHealth();
this.cooldown = this.icooldown;
}
public double getMaxDamage()
{
double damage = strength;
InventoryWeapon weapon = (InventoryWeapon) (this.getInventory().hasItem("Sword of Strength"));
// If holding a weapon
if (weapon != null){
damage = weapon.getMaxDamage() * (this.strength+ 100) / 100;}
damage += this.getBonuses().get(Bonus.Type.DAMAGE);
return damage;
}
public void update(World world, double dir_x, double dir_y, int delta) throws SlickException{
// Decrease the cooldown timer if necessary
if (this.getCooldownTimer() > 0)
{
this.cooldownTimer -= delta;
// If the attack is less than half cooled down, reset rotation
if (this.getCooldownTimer() < 0)
{
this.getAvatar().rotate(-this.getAvatar().getRotation());
}
}
// Calculate the player's new position on successful move
double newX = getX() + dir_x * SPEED * delta;
double newY = getY() + dir_y * SPEED * delta;
// Check for items near the new position
WorldItem item = scanForItem(world);
if (item!=null && this.getInventory().getItems().size() < 4)
{
this.pickupItem(item, world);
}
// Check for monsters near the new position
Monster m = scanForMonster(world);
if (m != null)
{
this.attack(m);
// If the monster was killed, add xp
if (m.getHealth() <= 0)
{
//monster die
m.die(world);
}
}
this.move(world, newX, newY, delta);
if(this.health<=0){
this.die();
}
}
/**
* Scan the area around the player for monsters to attack.
*
* @param gps
* The game world, which holds the list of monsters.
* @return The target to be attacked.
*/
Monster scanForMonster(World world)
{
// Check through every monster
for (Monster m : world.getMonsters())
{
// Early failure check - if diff in either axis is too great, move
// on
if (Math.abs(this.getX() - m.getX()) > this.getAttackRange()
|| Math.abs(this.getY() - m.getY()) > this.getAttackRange())
{
continue;
}
// Find the actual distance from the player
double monsterDist = world.distanceTo(this, m);
// If within range, return the monster as a target
if (monsterDist <= this.getAttackRange())
{
return m;
}
}
// No monsters in range, return null
return null;
}
/**
* Converts a WorldItem to an Item and adds it to the player's inventory.
*
* @param item
* The WorldItem to be converted and added.
* @param world
* The world from which to remove the WorldItem.
*/
public void pickupItem(WorldItem item, World world)
{
System.out.println(item.getType());
// If it's an accessory
if (item.getType() == Item.Type.ACCESSORY)
{
this.getInventory()
.addItem(
new InventoryAccessory(item.getName(), item.getAvatar(), item
.getBonuses()));
if (item.getName() == "Amulet of Vitality"){
this.health += 40;
this.maxHealth += 40;
}
else {
this.icooldown -= 200;
}
}
// If it's a weapon
else if (item.getType() == Item.Type.WEAPON)
{
WorldWeapon weapon = (WorldWeapon) (item);
this.getInventory().addItem(
new InventoryWeapon(weapon.getName(), weapon.getAvatar(), weapon
.getBonuses(), weapon.getMinDamage(), weapon.getMaxDamage()));
this.strength = this.getMaxDamage();
}
// If it's a quest item
else if (item.getType() == Item.Type.QUEST)
{
WorldQuest quest = (WorldQuest) (item);
this.getInventory().addItem(
new InventoryQuest(quest.getName(), quest.getAvatar(), quest.getBonuses()));
}
this.cooldown = (int) (this.icooldown + this.getBonuses().get(Bonus.Type.COOLDOWN));
// Debug print
System.out.println(getName() + " picked up " + item);
// Remove the item from the world
item.die(world);
}
/**
* Scan the area around the player for pickuppable items.
*
* @param gps
* The game world, which holds the list of world items.
* @return The item that may be picked up.
*/
WorldItem scanForItem(World world)
{
// Check through every WorldItem
for (WorldItem w : world.items)
{
// Early failure check - if diff in either axis is too great, move
// on
if (Math.abs(this.getX() - w.getX()) > this.getPickupRange()
|| Math.abs(this.getY() - w.getY()) > this.getPickupRange())
{
continue;
}
// Find the actual distance from the player
double itemDist = world.distanceTo(this, w);
// If within range, set the item as a pickup candidate
if (itemDist <= pickupRange)
{
return w;
}
}
// No items in range, return null
return null;
}
/**
* @return the pickupRange
*/
public float getPickupRange()
{
return pickupRange;
}
/**
* if player die
*/
public void die(){
this.init(900,590);
}
}

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package project2;
/*
* the player's inventory
* author: weiqian wang<wangw>
* */
import java.util.ArrayList;
import Items.InventoryItem;
public class Inventory
{
/** The max number of items the inventory can contain */
protected int capacity;
/** List of the items the unit owns */
protected ArrayList<InventoryItem> items = new ArrayList<InventoryItem>();
public Inventory(int capacity)
{
this.capacity = capacity;
}
public Inventory()
{
this.capacity = 4;
}
/**
* @param name
* The name of the item to find in the inventory
* @return whether the item is present
*/
public InventoryItem hasItem(String name)
{
for (InventoryItem item : items)
{
if (item.getName().equals(name))
return item;
}
return null;
}
/**
* Add an inventory item to the list of items in the inventory
*
* @param item
* the item to add
*/
public void addItem(InventoryItem item)
{
items.add(item);
}
/**
* @return the items
*/
public ArrayList<InventoryItem> getItems()
{
return items;
}
/**
* @return the capacity
*/
public int getCapacity()
{
return capacity;
}
}

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