عمل تحسين للبرنامج

صممت برنامج applet ويقوم بتحريك سيارة بالاعتماد على التسارع المأخوذ من معادلة الحركةوأريده أن يقوم بعمل الآتي

اللخمس ثواني الأولى التسارع متزايد

الخمس التي تليها التسارع منتظم الخمس التي تليها متناقص

بدل ان يتسارع بعجلة منتظمة

a1 and ddtt =0.0 to 5.0 متزايدة

a2 and ddtt=6.0 to 10.0 منتظمة

a3 and ddtt =10.0 to 15.0 متناقصة

//Sourcecode 

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

public class M_Sprite1 extends Applet implements Runnable
{
		Thread runner;
		private Image Buffer;
		private Graphics gBuffer;
		Image background, snail, snail1;
/////////////////////////////////////////////////////////////////////////////////////////////		
		private double dt=0.07,dtdt=0.0,fX = 1.0, fVx = 0.0, a=0.00;
		private double[] AA = new double[2];

	   // direction of animated arc. 
		private  int F = 1;
		private int B = 0;
  private int x=0, y=0;				// position  animated  
  private int sw,sh;
  private int direction = B;
/////////////////////////////////////////////////////////////////////////////////////////////	
		//Init is called first, do any initialisation here
		public void init()
		{
			   sw = size().width; sh=size().height; ////////////////////
				//create graphics buffer, the size of the applet
				Buffer=createImage(size().width,size().height);
				//System.out.println("W = "+sw);
				gBuffer=Buffer.getGraphics();

				background=getImage(getCodeBase(),"road3.png");
				snail=getImage(getCodeBase(),"ncar1.png");
				snail1=getImage(getCodeBase(),"car2.png");
		}

		public void start()
		{
			   if (runner == null)
			   {
						  runner = new Thread (this);
						  runner.start();
			   }
		}

		public void stop()
		{
			   if (runner != null)
			   {
					runner.stop();
					runner = null;
				}
		}

		public void run()
		{
				while(true)
				{
						//Thread sleeps for 15 milliseconds here
						try {runner.sleep(15);}
						catch (Exception e) { }
	  //System.out.println("W = "+sw);
						gBuffer.drawImage(background,0,30,this);
						AA= calcPosition (dt);
						/////////////////////////////////////////////////////////////////////////////////////////////  
		 // direction animated 
			 if (x >= sw && direction == F) {direction = B;x= 0;}  {dtdt+=dt;}

			 if (x<= 0 && direction == B) direction = F;

			 // angle start 

			 if (direction == F) {
							   x +=AA[1]; y = 0;
			 }

		   // if (direction == B ) {  
						   //  x -=AA[1]; y = 0;

				// }
			 /////////////////////////////////////////////////////////////////////////////////////////////  
						gBuffer.drawImage(snail,x,100,this);
						gBuffer.drawImage(snail1,x,50,this);

						repaint();
				}
		}	 

   //is needed to avoid erasing the background by Java
   public void update(Graphics g)
   {
				paint( g );
   }

   public void paint(Graphics g)
   {
			   Dimension d = getSize(); 
				//step(d.width, d.height);
				g.drawImage (Buffer,0,0, this);
   }
	 public double[] calcPosition  (double ddtt) {
   double[] A = new double[2];
	fX += fVx* ddtt+a*ddtt*ddtt/2;
	fVx += a * ddtt;
	for(ddtt=0;ddtt<=5.0;ddtt++)

	 fVx = +Math.abs(fVx);

	for(ddtt=6.0;ddtt<=10.0;ddtt++)

	  fVx= -Math.abs(fVx);



	System.out.println ( "\n\n\tfX = "+ fX + ", fVx  = " + fVx );
	A[1] =  fX;A[0]=fVx;
	return A;   
}
}