enemy3d.java

空战游戏,来自java2 编程第五版源码

import java.applet.*;
import java.awt.*;

class Enemy3D extends Object3D
{
	static final int SHIP_SPEED = 4;
	
	static final int XROT_SPEED = 2;
	static final int YROT_SPEED = 1;
	static final int ZROT_SPEED = 2;
	
	static double Object[] = {	0,		-20,	0,
								20,		0,		0,
								0,		20,		0,
								-20,	0,		0,
							
								0,		0,		-20,
								0,		0,		20};
	
	static int Lines[] = {	0,1,	1,2,	2,3,	3,0,
							0,4,	1,4,	2,4,	3,4,
							0,5,	1,5,	2,5,	3,5};
	
	int XWinkel;
	int YWinkel;
	int XAdd;
	int YAdd;
	
	int XRadius = 240;
	int YRadius = 200;

	int ShootCounter;

	public Enemy3D(int enemyflag, int xw, int yw, int xadd, int yadd, int shootflag)
	{
		Name = "Enemy3D";

		ZPos = 1200;
		
		XWinkel = xw;
		YWinkel = yw;
		XAdd = xadd;
		YAdd = yadd;
		
		VertNum = Object.length / 3;
		LineNum = Lines.length / 2;
	    
		Vertices = new Vector3D[VertNum];
		Points = new Point2D[VertNum];
		
		for (int i=0; i<VertNum; i++)
		{
			Points[i]   = new Point2D();
			Vertices[i] = new Vector3D();
			
			Vertices[i].x = Object[i*3+X];
			Vertices[i].y = Object[i*3+Y];
			Vertices[i].z = Object[i*3+Z];
		}
		
		Visible = true;

		ShootCounter = 0;
	}
	
	public void Draw(Graphics g, Matrix3D CameraMatrix)
	{
		Matrix3D MyMatrix = new Matrix3D();
		
		MyMatrix.RotateZ(ZRot);
		MyMatrix.RotateX(XRot);
		MyMatrix.RotateY(YRot);
		MyMatrix.Scale(XScale,YScale,ZScale);
		MyMatrix.Shear(XShear,YShear);
		MyMatrix.Translate(XPos,YPos,ZPos);
		
		MyMatrix.Merge(CameraMatrix.GetMatrix());

		for (int i=0; i<VertNum; i++)
		{
			MyMatrix.Transform(Vertices[i]);
			Points[i] = Point2D.Projection(Vertices[i]);			
		}
		
		for (int i=0; i<LineNum; i++)
		{
			g.setColor(new Color(255,255,0));
			g.drawLine(Points[Lines[i*2]].x,Points[Lines[i*2]].y,Points[Lines[i*2+1]].x,Points[Lines[i*2+1]].y);
		}
	}

	public boolean Handler()
	{
		if (WebWar.Collision(this))
		{
			WebWar.GetNewObject(new Explo3D(XPos,YPos,ZPos));
			WebWar.Score += 500;
			return false;
		}
		else
		{
			XPos = (int)(XRadius * Matrix3D.Sin(XWinkel));
			YPos = (int)(YRadius * Matrix3D.Cos(YWinkel));
			
			XWinkel -= XAdd;
			if (XWinkel < 0) XWinkel += 360;
			if (XWinkel > 360) XWinkel -= 360;
			YWinkel -= YAdd;
			if (YWinkel < 0) YWinkel += 360;
			if (YWinkel > 360) YWinkel -= 360;
			
			XRot += XROT_SPEED;
			if (XRot >= 360) XRot -= 360;
			YRot += YROT_SPEED;
			if (YRot >= 360) YRot -= 360;
			ZRot += ZROT_SPEED;
			if (ZRot >= 360) ZRot -= 360;

			ZPos -= 4;
			if (ZPos <= 100) return false;
			
			if (ShootCounter == 100)
			{
				if ((Ship3D.Player.XPos == XPos) && (Ship3D.Player.YPos == YPos))
				{
					ShootCounter = 0;
					WebWar.GetNewObject(new Bullet3D(XPos,YPos,ZPos,XRot,YRot,ZRot));
				}
			}
			else ShootCounter++;

			return true;
		}
	}
}