ammunition.java

坦克大战游戏源代码

import java.awt.*;

public class ammunition{
	private vector direction3D, centre, cross, normal,gravity;
	public double speed;
	public surface Surface;
	private int time;
	public int x_shift, y_shift;
	public vector[] points;

	public ammunition(surface Surface, vector direction3D, vector centre, vector cross, int x_shift, int y_shift){
		this.direction3D = direction3D.unit();
		this.centre = centre;
		this.Surface = Surface;
		this.cross = cross;
		this.x_shift = x_shift;
		this.y_shift = y_shift;
		speed = 18;
		normal = direction3D.cross(cross).unit();
		gravity = new vector(0, 0, -0.5);
		points = new vector[8];
		addPoints();
	}

	public void fly(int x_shift,int y_shift){
		this.x_shift = x_shift;
		this.y_shift = y_shift;
		vector c = centre;
		centre = centre.add(direction3D.unit().scale(speed)).add(gravity.scale(0.5*time));
		direction3D = centre.add(c.scale(-1)).unit();
		normal = direction3D.cross(cross).unit();
		addPoints();
		time++;
	}

	public void addPoints(){
		points[0] = createPoint(1,0,1);
		points[1] = createPoint(1,0,0);
		points[2] = createPoint(0,0,1);
		points[3] = createPoint(0,0,0);
		points[4] = createPoint(1,6,1);
		points[5] = createPoint(1,6,0);
		points[6] = createPoint(0,6,1);
		points[7] = createPoint(0,6,0);

	}

	public boolean Crashed(enemy[] enemys){
		if(Surface.evaluate(centre.a, centre.b) >= centre.c)
			return true;
		for(int i = 0; i  < enemys.length; i++){
			if(enemys[i].centre().subtract(centre).length() <= 15){
				return true;
			}
		}
		return false;
	}

	public void draw(Graphics g){
		vector shift = new vector(x_shift, y_shift);
		if(centre.subtract(shift).length() <750){

			g.setColor(new Color(144, 84, 39));
			g.drawLine(points[0].getX(), points[0].getY(), points[1].getX(), points[1].getY());
			g.drawLine(points[1].getX(), points[1].getY(), points[2].getX(), points[2].getY());
			g.drawLine(points[2].getX(), points[2].getY(), points[3].getX(), points[3].getY());
			g.drawLine(points[3].getX(), points[3].getY(), points[0].getX(), points[0].getY());
			g.drawLine(points[4].getX(), points[4].getY(), points[5].getX(), points[5].getY());
			g.drawLine(points[5].getX(), points[5].getY(), points[6].getX(), points[6].getY());
			g.drawLine(points[6].getX(), points[6].getY(), points[7].getX(), points[7].getY());
			g.drawLine(points[7].getX(), points[7].getY(), points[4].getX(), points[4].getY());
			g.drawLine(points[4].getX(), points[4].getY(), points[0].getX(), points[0].getY());
			g.drawLine(points[5].getX(), points[5].getY(), points[1].getX(), points[1].getY());
			g.drawLine(points[6].getX(), points[6].getY(), points[2].getX(), points[2].getY());
			g.drawLine(points[7].getX(), points[7].getY(), points[3].getX(), points[3].getY());

			g.setColor(Color.gray);
			vector v = new vector(centre.a - x_shift, centre.b - y_shift, Surface.evaluate(centre.a, centre.b));
			g.fillOval(v.getX()+1, v.getY()+1, 3, 3);
		}
	}

	public vector createPoint(int w, int l, int h){
		return centre.add(cross.scale(w)).add(direction3D.scale(l)).add(normal.scale(h)).subtract(new vector(x_shift, y_shift));
	}

	public explosion explode(){
		double a = centre.a; double b = centre.b;
		return new explosion(new vector(a, b, Surface.evaluate(a,b)), new vector(Surface.fx(a, b), Surface.fy(a, b)), 25, "ground", x_shift, y_shift);
	}
}