npcsprite.java

经典的超级玛丽游戏

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.*;
import java.util.Vector;

public class NpcSprite
{
	private Image Image_npc;
	public int npc_curspX,npc_curspY,npc_curViewPosX,npc_way=0,npc_kind,npc_curframe;
	public int npc_width,npc_height;
	
	private int npc_rows,npc_cols,npc_frames,npc_currow,npc_curcol;
	
	private int left_u_tile,left_d_tile,right_u_tile,right_d_tile,down_l_tile,down_r_tile,up_l_tile,up_r_tile;//npc周围的tile
	private boolean left_u_canmove=false,left_d_canmove=false,right_u_canmove=false,right_d_canmove=false,up_l_canmove=false,up_r_canmove=false,down_l_canmove=false,down_r_canmove=false;
	public boolean left_canmove=false,right_canmove=false,up_canmove=false,down_canmove=false;
	
	public boolean npc_life=true;
	public int npc_dead=10;
	
	private GameScreen gs;
	
	public NpcSprite(Image img,int x,int y,int width,int height,int kind,int curViewPosX,GameScreen gs)
	{
		this.gs=gs;
		this.Image_npc=img;
		this.npc_curspX=x;
		this.npc_curspY=y;
		
		this.npc_kind=kind;
		
		this.npc_curViewPosX=curViewPosX;
		
		this.npc_width=width;
		this.npc_height=height;
		
		if(img.getWidth()%width==0&&img.getHeight()%height==0)
		{
			this.npc_rows=img.getHeight()/height;
			this.npc_cols=img.getWidth()/width;
			this.npc_frames=npc_rows*npc_cols;
		}
		else//图片宽度或高度不是精灵宽度或高度的整数倍!
		{
			System.out.println("Can't not create sprite!");
			this.npc_frames=0;
		}
	}
	public void setFrame(int num)
	{
		if(npc_frames!=0)
		{
			this.npc_curframe=num;
			this.npc_currow=num/npc_cols;
			this.npc_curcol=num%npc_cols;
		}
		else
		{
			this.npc_curframe=-1;
		}
	}
	public int getFrame()
	{
		return this.npc_curframe;
	}
	
	public void CanMove(int x,int y)
	{
		if(y>156)
			y=156;
		if(x<1)
			x=1;
		
		this.left_u_tile=World.tileMap[y/World.TILE_HEIGHT][(x-1)/World.TILE_WIDTH];
		this.left_d_tile=World.tileMap[(y+npc_height-1)/World.TILE_HEIGHT][(x-1)/World.TILE_WIDTH];
		
		this.right_u_tile=World.tileMap[y/World.TILE_HEIGHT][(x+npc_width)/World.TILE_WIDTH];
		this.right_d_tile=World.tileMap[(y+npc_height-1)/World.TILE_HEIGHT][(x+npc_width)/World.TILE_WIDTH];
		
		this.up_l_tile=World.tileMap[(y-1)/World.TILE_HEIGHT][(x+1)/World.TILE_WIDTH];
		this.up_r_tile=World.tileMap[(y-1)/World.TILE_HEIGHT][(x+npc_width-2)/World.TILE_WIDTH];
		
		this.down_l_tile=World.tileMap[(y+npc_height)/World.TILE_HEIGHT][(x+1)/World.TILE_WIDTH];
		this.down_r_tile=World.tileMap[(y+npc_height)/World.TILE_HEIGHT][(x+npc_width-2)/World.TILE_WIDTH];
		
		//假设各个方向均不能移动
		this.left_canmove=false;
		this.left_u_canmove=false;
		this.left_d_canmove=false;
		
		this.right_canmove=false;
		this.right_u_canmove=false;
		this.right_d_canmove=false;
		
		this.up_canmove=false;
		this.up_l_canmove=false;
		this.up_r_canmove=false;
		
		this.down_canmove=false;
		this.down_l_canmove=false;
		this.down_r_canmove=false;
		
		//判断那些方向可以移动
		for(int i=0;i<World.CANPASS_TILE.length;i++)
		{
			
			if(this.left_u_tile==World.CANPASS_TILE[i])
				this.left_u_canmove=true;
			if(this.left_d_tile==World.CANPASS_TILE[i])
				this.left_d_canmove=true;
			
			if(this.right_u_tile==World.CANPASS_TILE[i])
				this.right_u_canmove=true;
			if(this.right_d_tile==World.CANPASS_TILE[i])
				this.right_d_canmove=true;
				
			if(this.up_l_tile==World.CANPASS_TILE[i])
				this.up_l_canmove=true;
			if(this.up_r_tile==World.CANPASS_TILE[i])
				this.up_r_canmove=true;
			
			if(this.down_l_tile==World.CANPASS_TILE[i])
				this.down_l_canmove=true;
			if(this.down_r_tile==World.CANPASS_TILE[i])
				this.down_r_canmove=true;
		}
		if(left_u_canmove==true&&left_d_canmove==true)
			this.left_canmove=true;
		if(right_u_canmove==true&&right_d_canmove==true)
			this.right_canmove=true;
		if(up_l_canmove==true&&up_r_canmove==true)
			this.up_canmove=true;
		if(down_l_canmove==true&&down_r_canmove==true)
			this.down_canmove=true;
		
		if(npc_kind==4)
		{
			this.left_canmove=true;
			this.right_canmove=true;
			this.up_canmove=true;
			this.down_canmove=true;
		}
			
	}
	public void draw(Graphics g)
	{
		g.setClip(npc_curspX,npc_curspY,npc_width,npc_height);
		g.drawImage(Image_npc,npc_curspX-npc_curcol*npc_width,npc_curspY-npc_currow*npc_height,g.TOP|g.LEFT);
	}
	
	
	private int cos=50000,sin=86603;
	private int v0=4,vy=v0*sin,g=42;
	public int y1=0,y2=0,y0=-1,stopcurspY=-1,t=0;
	public boolean npc_bjump=false;
	
	

	public void whichjump(int i)//设置精灵跳跃的幅度
	{
		switch(i)
		{
			case(0)://小跳
				this.v0=8;
				this.g=42;
			break;
			
			case(1)://大跳
				this.v0=5;
				this.g=22;
			break;
			
			case(2)://踩怪物弹起
				this.v0=6;
				this.g=60;
			break;
		}
	}
	
	public void jump()//跳跃
	{
		if(y0==-1)
			y0=npc_curspY;
		y1=y2;
		y2=(vy*t-g*t*t*400)/100000;	
		
		stopcurspY=-1;//上升时可以跳到的最大高度（在大不能向上走了）
		if((y2-y1)>0)//上升
		{
			for(int i=0;i<(y2-y1);i++)
			{
				CanMove(gs.currentViewPosX-gs.getWidth()/2+npc_curspX,gs.currentViewPosY-gs.getHeight()/2+npc_curspY);
				
				if(up_canmove==true)
					npc_curspY--;
				else
				{
					if(stopcurspY==-1)
						stopcurspY=npc_curspY;
					while(npc_curspY<=stopcurspY)
					{
						t+=2;
						y1=y2;
						y2=(vy*t-g*t*t*400)/100000;	
						npc_curspY-=(y2-y1);
					}
				}
			}
		}
		else//下降
		{
			for(int i=0;i<(y1-y2);i++)
			{
				CanMove(gs.currentViewPosX-gs.getWidth()/2+npc_curspX,gs.currentViewPosY-gs.getHeight()/2+npc_curspY);
				
				if(down_canmove==true)
					npc_curspY++;
				else
				{
					t=-3;
					y1=0;
					y2=0;
					y0=-1;
					npc_bjump=false;
					
					break;
				}
			}
		}
	}
	
}