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

public class Surface {

	int WIDTH;
	int HEIGHT;
	int mouseX;
	int mouseY;
	boolean theMouseDown;
	int xArray[];
	int yArray[];
	int nPoints;
	int moveX;
	int sizeOfOneCycle;
	int amplitude;
	Color grayBlue = new Color(180,200,255);
	
	
	
	
	public Surface (int w, int h){
		WIDTH = w;
		HEIGHT = h;
		mouseX = 0;
		mouseY = 0;
		theMouseDown = false;
	}


	public void initialize(){
	
	
		nPoints = WIDTH * 4;
		xArray = new int[nPoints];
		yArray = new int[nPoints];
		moveX = 0;
		sizeOfOneCycle = nPoints;

		
		
	}


	public void paint (Graphics G){
		int r,g,b;
		g = b = 0;
		r = 255;
		G.setColor(Color.white);
		G.drawRect(0,0,480,480);
		
		double sineHolder = 0;	
		int centerObject = WIDTH/2;
	
		//for(int yPos = 0;yPos < 5; yPos++){
			
		
			for(double i=0;i<nPoints;i++){
			
					
					
				//sizeOfOneCycle = sizeOfOneCycle / ((mouseX + 1)/50);
			
				sineHolder = (mouseY/2) * Math.sin((i/(nPoints/2)) * (2 * Math.PI));
	
				amplitude = (int)sineHolder;
		
					
				sineHolder = amplitude * Math.sin((((i/((sizeOfOneCycle) / (1+(mouseX/5)))) * (2 * Math.PI))));
				
				if(theMouseDown){
					sineHolder = amplitude * Math.tan((((i/((sizeOfOneCycle) / (1+(mouseX/5)))) * (2 * Math.PI))));
				}

					
				
				yArray[(int)i] = (int)sineHolder + centerObject;//(yPos * 100) + 30;
				xArray[(int)i] = (int)i - sizeOfOneCycle; //- 350;
			
				if(i<nPoints - 1){			
					G.setColor(Color.white);
					G.drawRect(0,0,480,480);
					
					
					if(r==255 && g<255 && b==0)
						g+=5;
					else if(r > 0 && g==255 && b == 0)
						r-=5;
					else if(r==0 && g == 255 && b<255)
						b+=5;
					else if(r==0 && g > 0 &&b == 255)
						g-=5;
					else if(r<255 && g == 0 && b ==255)
						r+=5;
					else if(r == 255 && g == 0 && b > 0)
						b-=5;				
								
					G.setColor(new Color(r,g,b));
					
					
	
					//G.setColor(grayBlue);
					//G.drawOval((xArray[(int)i]),yArray[(int)i],1,1);
					G.drawOval((xArray[(int)i] + sizeOfOneCycle/2),yArray[(int)i],10,10);
					//G.drawLine((xArray[(int)i]),yArray[(int)i],xArray[(int)i+1],yArray[(int)i+1]);
					//G.drawLine((xArray[(int)i] + sizeOfOneCycle/2),yArray[(int)i],
					//			(xArray[(int)i+1] + sizeOfOneCycle/2),yArray[(int)i+1]);
				}
			}
		//}		

	
	
	
	
	
	
	
	
	}


	public void compute(){
	
	moveX += 10;
	moveX = moveX % ((sizeOfOneCycle) * 4);
		
	}
	
	
	
	//-------------------------------------------------------
	// events
	public void keyDown(char key) { 

	}
	

	public void mouseDown (int x, int y){
		mouseX = x; 
		mouseY = y;
		theMouseDown = true;
	}

	public void mouseMove (int x, int y){
		mouseX = x; 
		mouseY = y;
		theMouseDown = false;
	}
	
	public void mouseUp (int x, int y){
		mouseX = x; 
		mouseY = y; 
		theMouseDown = false;
	}
	
	public void mouseDrag (int x, int y){ 
		mouseX = x; 
		mouseY = y; 
		theMouseDown = true;
	}


}







//______________________________________________________________________
/*Grave Yard

		G.drawOval((yArray[(int)i]),xArray[(int)i] + moveX,1,1);
				G.drawOval((yArray[(int)i]) ,xArray[(int)i] + 120 + moveX,10,10);
				
				G.drawOval((xArray[(int)i]) - 30 + moveX,yArray[(int)i] + 120,1,1);
				G.drawOval((xArray[(int)i] - 30 + 120) + (moveX),yArray[(int)i] + 120,10,10);
	
				
			//G.drawOval(240,yArray[(int)i],4,4);

*/