import java.applet.*; import java.awt.*; import java.lang.Math; import java.lang.Object; public class Cube extends Applet { public class point implements Cloneable{ public int x; public int y; public Object clone(){ //begin clone try{ //begin try return super.clone(); } //end try catch(CloneNotSupportedException e){ // begin catch return null; //if there is a catch } //end catch } //end cloning structure for point } //end point def public class rpoint implements Cloneable{ public double x; public double y; public double z; public Object clone(){ //begin clone try{ //begin try return super.clone(); } //end try catch(CloneNotSupportedException e){ // begin catch return null; //if there is a catch } //end catch } //end cloning structure for point } //end point def public class RCube implements Cloneable{ public rpoint front=new rpoint(); public rpoint side=new rpoint(); public rpoint top=new rpoint(); public point up1=new point(); public point up2=new point(); public point up3=new point(); public point up4=new point(); public point down1=new point(); public point down2=new point(); public point down3=new point(); public point down4=new point(); public double esize=30.0; public rpoint raxis=new rpoint(); public double theta=0.0; public Object clone(){ //begin clone try{ //begin try RCube cu=(RCube)super.clone(); cu.front=(rpoint)front.clone(); cu.top=(rpoint)top.clone(); cu.side=(rpoint)side.clone(); cu.raxis=(rpoint)raxis.clone(); cu.up1=(point)up1.clone(); cu.up2=(point)up2.clone(); cu.up3=(point)up3.clone(); cu.up4=(point)up4.clone(); cu.down1=(point)down1.clone(); cu.down2=(point)down2.clone(); cu.down3=(point)down3.clone(); cu.down4=(point)down4.clone(); return cu; } //end try catch(CloneNotSupportedException e){ return null; }//end catch } //end cloning structure for body } // end Cube def private int i; private int last_x=0; private int last_y=0; private Color current_color=Color.black; private Button clear_button; private Button draw_button; private Choice ang_choices; public RCube er=new RCube(); public RCube cu=new RCube(); public RCube c=new RCube(); private double xmult=0.5; private double mult=0.01; private double phi=0.0; private double psi=0.0; private int delX; private int delY; //init applet public void init(){ //set backgd color this.setBackground(Color.white); //create a button clear_button=new Button("Clear"); clear_button.setForeground(Color.black); clear_button.setBackground(Color.lightGray); this.add(clear_button); //create a button draw_button=new Button("Draw Cube"); draw_button.setForeground(Color.black); draw_button.setBackground(Color.lightGray); this.add(draw_button); } //end init applet //called when mouse click public boolean mouseDown(Event e, int x, int y){ last_x=x; last_y=y; return true; } //called when mouse moves public boolean mouseDrag(Event e, int x, int y){ Graphics g=this.getGraphics(); er=(RCube)c.clone(); // figure phi and psi delX=x - last_x; delY=y - last_y; phi=phi+ mult*delX; psi=psi- mult*delY; c.front.x=Math.cos(psi)*Math.cos(phi); c.front.z=Math.sin(psi)*Math.cos(phi); c.front.y= Math.sin(phi); c.side.x= -Math.cos(psi)*Math.sin(phi); c.side.z= -Math.sin(psi)*Math.sin(phi); c.side.y= Math.cos(phi); c.top.x =c.front.y*c.side.z - c.front.z*c.side.y; c.top.y = c.front.z*c.side.x - c.front.x*c.side.z; c.top.z = c.front.x*c.side.y - c.front.y*c.side.x; //figure vertices c.down1.y=(int)(80 + c.esize*(xmult*(c.front.x - c.top.x - c.side.x) + c.top.z - c.front.z + c.side.z)); c.down1.x=(int)(60 + c.esize*(xmult*(-c.front.x + c.top.x + c.side.x) + c.front.y + c.top.y - c.side.y)); c.down2.y=(int)(80 + c.esize*(xmult*(c.front.x - c.top.x + c.side.x) + c.top.z - c.front.z + c.side.z)); c.down2.x=(int)(60 + c.esize*(xmult*(-c.front.x + c.top.x - c.side.x) + c.front.y + c.top.y + c.side.y)); c.down4.y=(int)(80 + c.esize*(xmult*(-c.front.x - c.top.x + c.side.x) + c.top.z + c.front.z + c.side.z)); c.down4.x=(int)(60 + c.esize*(xmult*(c.front.x + c.top.x - c.side.x) - c.front.y + c.top.y + c.side.y)); c.down3.y=(int)(80 + c.esize*(xmult*(-c.front.x - c.top.x - c.side.x) + c.top.z + c.front.z + c.side.z)); c.down3.x=(int)(60 + c.esize*(xmult*(c.front.x + c.top.x + c.side.x) - c.front.y - c.top.y - c.side.y)); c.up1.y=(int)(80 + c.esize*(xmult*(c.front.x + c.top.x - c.side.x) - c.top.z - c.front.z - c.side.z)); c.up1.x=(int)(60 + c.esize*(xmult*(-c.front.x - c.top.x + c.side.x) + c.front.y - c.top.y - c.side.y)); c.up2.y=(int)(80 + c.esize*(xmult*(c.front.x + c.top.x + c.side.x) - c.top.z - c.front.z - c.side.z)); c.up2.x=(int)(60 + c.esize*(xmult*(-c.front.x - c.top.x - c.side.x) + c.front.y + c.top.y + c.side.y)); c.up4.y=(int)(80 + c.esize*(xmult*(-c.front.x + c.top.x + c.side.x) - c.top.z + c.front.z - c.side.z)); c.up4.x=(int)(60 + c.esize*(xmult*(c.front.x - c.top.x - c.side.x) - c.front.y + c.top.y + c.side.y)); c.up3.y=(int)(80 + c.esize*(xmult*(-c.front.x + c.top.x - c.side.x) - c.top.z + c.front.z - c.side.z)); c.up3.x=(int)(60 + c.esize*(xmult*(c.front.x - c.top.x + c.side.x) - c.front.y - c.top.y - c.side.y)); // erase g.setColor(Color.white); g.drawLine(er.up3.x,er.up3.y,er.up4.x,er.up4.y);//up3 to up4 g.drawLine(er.up3.x,er.up3.y,er.up1.x,er.up1.y);//up3 to up1 g.drawLine(er.up4.x,er.up4.y,er.up2.x,er.up2.y);//up4 to up2 g.drawLine(er.up1.x,er.up1.y,er.up2.x,er.up2.y);//up1 to up2 g.drawLine(er.up3.x,er.up3.y,er.down3.x,er.down3.y);//up3 to down3 g.drawLine(er.up4.x,er.up4.y,er.down4.x,er.down4.y);//up4 to down4 g.drawLine(er.up1.x,er.up1.y,er.down1.x,er.down1.y);//up1 to down1 g.drawLine(er.up2.x,er.up2.y,er.down2.x,er.down2.y);//up2 to down2 g.drawLine(er.down3.x,er.down3.y,er.down1.x,er.down1.y);//down3 to down1 g.drawLine(er.down2.x,er.down2.y,er.down4.x,er.down4.y);//down4 to down2 g.drawLine(er.down4.x,er.down4.y,er.down3.x,er.down3.y);//down3 to down4 g.drawLine(er.down1.x,er.down1.y,er.down2.x,er.down2.y);//down1 to down2 //draw g.setColor(Color.black); g.drawLine(c.up1.x,c.up1.y,c.up2.x,c.up2.y);//up1 to up2 g.drawLine(c.up3.x,c.up3.y,c.up1.x,c.up1.y);//up3 to up1 g.drawLine(c.up4.x,c.up4.y,c.up2.x,c.up2.y);//up4 to up2 g.drawLine(c.up3.x,c.up3.y,c.up4.x,c.up4.y);//up3 to up4 g.setColor(Color.red); g.drawLine(c.up3.x,c.up3.y,c.down3.x,c.down3.y);//up3 to down3 g.drawLine(c.up4.x,c.up4.y,c.down4.x,c.down4.y);//up4 to down4 g.drawLine(c.up1.x,c.up1.y,c.down1.x,c.down1.y);//up1 to down1 g.drawLine(c.up2.x,c.up2.y,c.down2.x,c.down2.y);//up2 to down2 g.drawLine(c.down4.x,c.down4.y,c.down3.x,c.down3.y);//down3 to down4 g.drawLine(c.down1.x,c.down1.y,c.down2.x,c.down2.y);//down1 to down2 g.drawLine(c.down3.x,c.down3.y,c.down1.x,c.down1.y);//down3 to down1 g.drawLine(c.down2.x,c.down2.y,c.down4.x,c.down4.y);//down4 to down2 last_x=x; last_y=y; return true; } //user clicks button or chooses a color public boolean action(Event event, Object arg){ if(event.target==clear_button){ Graphics g=this.getGraphics(); Rectangle r=this.bounds(); g.setColor(this.getBackground()); g.fillRect(r.x,r.y,r.width,r.height); return true; } //end clear // in case of click else if(event.target==draw_button){ // draw c.front.x=1.0; c.front.y=0.0; c.front.z=0.0; c.side.x=0.0; c.side.y=1.0; c.side.z=0.0; c.top.x=0.0; c.top.y=0.0; c.top.z=1.0; phi=0.0; psi=0.0; c.down1.y=(int)(80 + c.esize*(xmult*(c.front.x - c.top.x - c.side.x) + c.top.z - c.front.z + c.side.z)); c.down1.x=(int)(60 + c.esize*(xmult*(-c.front.x + c.top.x + c.side.x) + c.front.y + c.top.y - c.side.y)); c.down2.y=(int)(80 + c.esize*(xmult*(c.front.x - c.top.x + c.side.x) + c.top.z - c.front.z + c.side.z)); c.down2.x=(int)(60 + c.esize*(xmult*(-c.front.x + c.top.x - c.side.x) + c.front.y + c.top.y + c.side.y)); c.down4.y=(int)(80 + c.esize*(xmult*(-c.front.x - c.top.x + c.side.x) + c.top.z + c.front.z + c.side.z)); c.down4.x=(int)(60 + c.esize*(xmult*(c.front.x + c.top.x - c.side.x) - c.front.y + c.top.y + c.side.y)); c.down3.y=(int)(80 + c.esize*(xmult*(-c.front.x - c.top.x - c.side.x) + c.top.z + c.front.z + c.side.z)); c.down3.x=(int)(60 + c.esize*(xmult*(c.front.x + c.top.x + c.side.x) - c.front.y - c.top.y - c.side.y)); c.up1.y=(int)(80 + c.esize*(xmult*(c.front.x + c.top.x - c.side.x) - c.top.z - c.front.z - c.side.z)); c.up1.x=(int)(60 + c.esize*(xmult*(-c.front.x - c.top.x + c.side.x) + c.front.y - c.top.y - c.side.y)); c.up2.y=(int)(80 + c.esize*(xmult*(c.front.x + c.top.x + c.side.x) - c.top.z - c.front.z - c.side.z)); c.up2.x=(int)(60 + c.esize*(xmult*(-c.front.x - c.top.x - c.side.x) + c.front.y + c.top.y + c.side.y)); c.up4.y=(int)(80 + c.esize*(xmult*(-c.front.x + c.top.x + c.side.x) - c.top.z + c.front.z - c.side.z)); c.up4.x=(int)(60 + c.esize*(xmult*(c.front.x - c.top.x - c.side.x) - c.front.y + c.top.y + c.side.y)); c.up3.y=(int)(80 + c.esize*(xmult*(-c.front.x + c.top.x - c.side.x) - c.top.z + c.front.z - c.side.z)); c.up3.x=(int)(60 + c.esize*(xmult*(c.front.x - c.top.x + c.side.x) - c.front.y - c.top.y - c.side.y)); Graphics g=this.getGraphics(); g.setColor(Color.black); g.drawLine(c.up3.x,c.up3.y,c.up4.x,c.up4.y);//up3 to up4 g.drawLine(c.up3.x,c.up3.y,c.down3.x,c.down3.y);//up3 to down3 g.drawLine(c.down4.x,c.down4.y,c.down3.x,c.down3.y);//down3 to down4 g.drawLine(c.up4.x,c.up4.y,c.down4.x,c.down4.y);//up4 to down4 g.drawLine(c.up1.x,c.up1.y,c.up2.x,c.up2.y);//up1 to up2 g.drawLine(c.up1.x,c.up1.y,c.down1.x,c.down1.y);//up1 to down1 g.drawLine(c.up2.x,c.up2.y,c.down2.x,c.down2.y);//up2 to down2 g.drawLine(c.down1.x,c.down1.y,c.down2.x,c.down2.y);//down1 to down2 g.drawLine(c.up3.x,c.up3.y,c.up1.x,c.up1.y);//up3 to up1 g.drawLine(c.up4.x,c.up4.y,c.up2.x,c.up2.y);//up4 to up2 g.drawLine(c.down3.x,c.down3.y,c.down1.x,c.down1.y);//down3 to down1 g.drawLine(c.down2.x,c.down2.y,c.down4.x,c.down4.y);//down4 to down2 return true; } //end draw button event // other wise let superclass handle it else return super.action(event, arg); } // end action method } //end Applet