/********************************************************************************************************/
/* This section of the program controls the return button on the page. The button instance is named     */
/* return120.                                                                                           */
/********************************************************************************************************/


return120.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlayFromFrame_12);

function fl_ClickToGoToAndPlayFromFrame_12(event:MouseEvent):void
{
	gotoAndPlay(80);
}

/********************************************************************************************************/
/*                                 End Return Button Section                                            */
/********************************************************************************************************/


/********************************************************************************************************/
/*                                Variable Declaration Section                                          */
/*                                                                                                      */
/********************************************************************************************************/

/********************************************************************************************************/
/*                            Initial Resistance Values in Ohms                                         */
/********************************************************************************************************/  

var R1=3;
var R2=3;
var R3=3;
var R4=3;


/********************************************************************************************************/
/*       Initial Resistor Position Values (0=3ohms, 1=6 ohms, 2=Infinite Ohms 3=zero ohms)              */
/********************************************************************************************************/

var R1pos=0;
var R2pos=0;
var R3pos=0;
var R4pos=0;

/********************************************************************************************************/
/*                  Initial Meter Values (circuit voltage is zero initially)                            */
/********************************************************************************************************/

var v1=0;
var v2=0;
var v3=0;
var v4=0;
var v5=0;
var a1=0;
var a2=0;
var a3=0;


/********************************************************************************************************/
/*                            Initial Calculated Resistance Values in Ohms                              */
/********************************************************************************************************/


var RTotal=5;
var RL1=6;
var RL2=3;
var RL3=3;
var RPara=2;


/********************************************************************************************************/
/*                                      Initial System Values                                           */
/********************************************************************************************************/

var voltage=0.0;
var sysCurrent=0;

/********************************************************************************************************/
/*                                     Control Variables                                                */
/********************************************************************************************************/

var initialler=0;
var selectMe = -1;
var shortMe=0;
var openMe=0;

/********************************************************************************************************/
/*                                     Create Initial Display (One time only)                           */
/********************************************************************************************************/


	if (initialler==0) {
		displayMe();
		initialler=1;
	}

/********************************************************************************************************/
/*                                     Voltage Button Controls                                          */
/*This portion of the problem selects the appropriate voltage when a user selects a voltage button      */
/*Upon making a selection the other two voltage buttons are rendered inop by using the hideOthers       */
/*function. The selectMe variable toggles between negative one and positive one for control             */
/********************************************************************************************************/

volt9.addEventListener(MouseEvent.CLICK, hideOthers1);

function hideOthers1(event:MouseEvent):void {

	selectMe=selectMe*-1;         /*Event Toggle*/
	
	if (selectMe == 1){           /* 9 Volt switch goes from off to on */

	voltage=9.0;                  /* Set System Voltage Value*/

  	volt6.visible = false;        /*Disable other buttons*/
  	volt3.visible = false;

  	renewMe();}                  /*Calculate & Display new values based on changes*/


	else {                       /* 9 Volt switch goes from on to off */
	voltage=0.0;                  /* Set System Voltage Value*/

  	volt6.visible = true;        /*Enable other buttons*/
  	volt3.visible = true;

  	renewMe();}                  /*Calculate & Display new values based on changes*/
}




volt6.addEventListener(MouseEvent.CLICK, hideOthers2);

function hideOthers2(event:MouseEvent):void {

	selectMe=selectMe*-1;         /*Event Toggle*/
	
	if (selectMe == 1){           /* 6 Volt switch goes from off to on */

	voltage=6.0;                  /* Set System Voltage Value*/

  	volt9.visible = false;        /*Disable other buttons*/
  	volt3.visible = false;

  	renewMe();}                  /*Calculate & Display new values based on changes*/


	else {                       /* 6 Volt switch goes from on to off */
	voltage=0.0;                  /* Set System Voltage Value*/

  	volt9.visible = true;        /*Enable other buttons*/
  	volt3.visible = true;

  	renewMe();}                  /*Calculate & Display new values based on changes*/
}
	


volt3.addEventListener(MouseEvent.CLICK, hideOthers3);

function hideOthers3(event:MouseEvent):void {

	selectMe=selectMe*-1;         /*Event Toggle*/
	
	if (selectMe == 1){           /* 3 Volt switch goes from off to on */

	voltage=3.0;                  /* Set System Voltage Value*/

  	volt6.visible = false;        /*Disable other buttons*/
  	volt9.visible = false;

  	renewMe();}                  /*Calculate & Display new values based on changes*/


	else {                       /* 3 Volt switch goes from on to off */
	voltage=0.0;                  /* Set System Voltage Value*/

  	volt6.visible = true;        /*Enable other buttons*/
  	volt9.visible = true;

  	renewMe();}                  /*Calculate & Display new values based on changes*/
}



/********************************************************************************************************/
/*                                     Resistor Knob Controls                                           */
/*This portion of the problem selects the appropriate resistance when a user selects a resistance knob  */
/*                                                                                                      */
/********************************************************************************************************/


Resistor1.addEventListener(MouseEvent.CLICK, ValueR1);

function ValueR1(event:MouseEvent):void {
	R1pos=R1pos+1;                  /*Knob virtually advances*/
	if(R1pos==4){R1pos=0;}          /* Reset Knob when it comes all the way around */
	if(R1pos==0) {R1=3;}
	if(R1pos==1) {R1=6;}
	if(R1pos==2) {R1=999;}
	if(R1pos==3) {R1=0;}

	renewMe();                     /*Calculate & Display new values based on changes*/
}


Resistor2.addEventListener(MouseEvent.CLICK, ValueR2);

function ValueR2(event:MouseEvent):void {
	R2pos=R2pos+1;
	if(R2pos==4){R2pos=0;}
	if(R2pos==0) {R2=3;}
	if(R2pos==1) {R2=6;}
	if(R2pos==2) {R2=999;}
	if(R2pos==3) {R2=0;}

	renewMe();
}

Resistor3.addEventListener(MouseEvent.CLICK, ValueR3);

function ValueR3(event:MouseEvent):void {
	R3pos=R3pos+1;
	if(R3pos==4){R3pos=0;}
	if(R3pos==0) {R3=3;}
	if(R3pos==1) {R3=6;}
	if(R3pos==2) {R3=999;}
	if(R3pos==3) {R3=0;}
	renewMe();
}

Resistor4.addEventListener(MouseEvent.CLICK, ValueR4);

function ValueR4(event:MouseEvent):void {
	R4pos=R4pos+1;
	if(R4pos==4){R4pos=0;}
	if(R4pos==0) {R4=3;}
	if(R4pos==1) {R4=6;}
	if(R4pos==2) {R4=999;}
	if(R4pos==3) {R4=0;}
	renewMe();
}

function renewMe():void{

        calcLegs();
        if (shortMe==1) {gotoAndPlay(180);}                   /* Short Circuit Situation - Go To Short Circuit Page  */
 	if (openMe==1) {zeroMe();}                            /* Open circuit - No Current Flow - Therefore all values are zero */
	if (voltage==0) {zeroMe();}                           /* No Voltage present - Therefore all values are zero */
	if (shortMe==0 && openMe==0 && voltage!=0) {          /* There is an actual circuit go and calculate values */
		
		sysCurrent=voltage/RTotal;                    /* Calculate System current by dividing voltage by resistance */
		a1=sysCurrent;                                /* Value for a1 ammeter */
		v1=sysCurrent*RL3;                            /* Voltage drop across first resistor */

		if(RL1==-1) {                                 /* Either R3 or R4 are open therefore no current flowing through this branch of the circuit */
		   v3=0;
	           v4=0;
	           v5=0;
                   a3=0;
		   v2=sysCurrent*RL2;                         /* All current flows through middle leg of circuit */
		   a2=sysCurrent;
			}

		if(RL2==-1) {                                 /* R2 is open therefore no current flowing through this branch of the circuit */
		   v3=sysCurrent*R3;
	           v4=sysCurrent*RL1;
	           v5=sysCurrent*R4;
                   a3=sysCurrent;                             /* All current flows through far right leg of circuit */
		   v2=0;
		   a2=0;
			}

		if(RL2!=-1 && RL1!=-1) {                      /* Current flows through both legs of circuit */

 		   a2=sysCurrent*(RL1/(RL1+RL2));              /* Current is proportional to resistance in each leg (Kirchhoffs Proportional Law) */
		   a3=sysCurrent*(RL2/(RL1+RL2));
		   v2=a2*RL2                                  /* Calculate voltage drops */
		   v3=a3*R3;
	           v4=a3*RL1;
	           v5=a3*R4;                
		   	}
                 truncateMe();
                    }
       openMe=0;


}




/********************************************************************************************************/
/*                                     calcLegs Function                                                */
/*This portion of the problem selects the appropriate voltage when a user selects a voltage button      */
/*Upon making a selection the other two voltage buttons are rendered inop by using the hideOthers       */
/*function. The selectMe variable toggles between negative one and positive one for control             */
/********************************************************************************************************/

function calcLegs():void{

         if (R3pos==2 || R4pos==2) {RL1=-1;} else {RL1=R3+R4;}
         if (R2pos==2) {RL2=-1;} else {RL2=R2;}
	 if (R1pos==2) {RL3=-1;} else {RL3=R1;}
	 if (RL1!=-1 && RL2!=-1) {RPara=(RL1*RL2)/(RL1+RL2);}
         if (RL1==-1 && RL2==-1) {RPara=-1;}
	 if (RL1==-1 && RL2!=-1) {RPara=RL2;}
	 if (RL2==-1 && RL1!=-1) {RPara=RL1;}
	 if (RL3==0 && RPara==0) {shortMe=1;}
	 if (RL3==-1 || RPara==-1) {openMe=1;}
	 if (shortMe==0 && openMe==0) {RTotal=RL3+RPara;}
}


/********************************************************************************************************/
/*                                     zeroMe Function                                                  */
/*                                                                                                      */
/*                   Sets all values to zero and then calls on the display function                     */
/*                                                                                                      */
/********************************************************************************************************/

function zeroMe():void{

	v1=0;
	v2=0;
	v3=0;
	v4=0;
	v5=0;
	a1=0;
	a2=0;
	a3=0;
	displayMe();
    }


function truncateMe():void{
	v1= int((v1)*100)/100;
	v2= int((v2)*100)/100;
	v3= int((v3)*100)/100;
	v4= int((v4)*100)/100;
	v5= int((v5)*100)/100;
	a1= int((a1)*100)/100;
	a2= int((a2)*100)/100;
	a3= int((a3)*100)/100;
	displayMe();
       }

	


function displayMe():void{

                DisAmps1.text=String(a1);
		DisAmps2.text=String(a2);
		DisAmps3.text=String(a3);
		DisVolts1.text=String(v1);
		DisVolts2.text=String(v2);
		DisVolts3.text=String(v3);
		DisVolts4.text=String(v4);
		DisVolts5.text=String(v5);
                         }