/*
 * ColourCubeFaceExplore
 * Copyleft: Srikanth Narayan
 * Date: 19 Sep 2007
*/



// Analog pin settings

int aIn = 0;    // Potentiometers connected to analog pins 0, 1, and 2

int bIn = 1;    //   (Connect power to 5V and ground to analog ground)

int cIn = 2;  



// Digital pin settings

int aOut = 9;   // LEDs connected to digital pins 9, 10 and 11

int bOut = 10;  //   (Connect cathodes to digital ground)

int cOut = 11;  

char serInString[100];


// Values

int aVal = 0;   // Variables to store the input from the potentiometers

int bVal = 0;  

int cVal = 0;  


boolean xyPlane = false;

boolean xzPlane = false;

boolean yzPlane = false;



void setup()

{

  pinMode(aOut, OUTPUT);   // sets the digital pins as output

  pinMode(bOut, OUTPUT);   

  pinMode(cOut, OUTPUT); 

  Serial.begin(9600);     // Open serial communication for reporting

}



void loop()

{
  readSerialString(serInString, 100);
  
  processCommand(serInString, 100);
  
  if(yzPlane == true)
  {
    bVal = analogRead(aIn) / 4;
    cVal = analogRead(aIn) / 4;
    
    analogWrite(aOut, aVal);
    analogWrite(bOut, bVal);
    analogWrite(cOut, cVal);
  }
  if(xzPlane == true)
  {
    aVal = analogRead(bIn) / 4;
    cVal = analogRead(bIn) / 4;
    
    analogWrite(aOut, aVal);
    analogWrite(bOut, bVal);
    analogWrite(cOut, cVal);
  }
  if(xyPlane == true)
  {
    aVal = analogRead(cIn) / 4;
    bVal = analogRead(cIn) / 4;
        
    analogWrite(aOut, aVal);
    analogWrite(bOut, bVal);
    analogWrite(cOut, cVal);
  }
  delay(100);
}
  

boolean stringsEqual(char *string1, char *string2, int numCharacters) {
  if (strncmp(string1, string2, numCharacters) == 0) {
    return true;
  } else {
    return false;
  }
}


void processCommand(char *strArray, int num)
{
  if(stringsEqual(strArray, "xmin", 4))
  {
    Serial.print("xmin");
    aVal = 0;
    yzPlane = true;
    xyPlane = xzPlane = false;
  }
  if(stringsEqual(strArray, "xmax", 4))
  {
    Serial.print("xmax");
    aVal = 255;
    yzPlane = true;
    xyPlane = xzPlane = false;
  }
  if(stringsEqual(strArray, "ymin", 4))
  {
    Serial.print("ymin");
    bVal = 0;
    xzPlane = true;
    yzPlane = xyPlane = false;
  }
  if(stringsEqual(strArray, "ymax", 4))
  {
    Serial.print("ymax");
    bVal = 255;
    xzPlane = true;
    yzPlane = xyPlane = false;
  }
  if(stringsEqual(strArray, "zmin", 4))
  {
    Serial.print("zmin");
    cVal = 0;
    xyPlane = true;
    yzPlane = xzPlane = false;
  }
  if(stringsEqual(strArray, "zmax", 4))
  {
    Serial.print("zmax");
    cVal = 255;
    xyPlane = true;
    yzPlane = xzPlane = false;
  }
}
      
    

//read a string from the serial and store it in an array
//you must supply the array variable
void readSerialString (char *strArray, int maxLength) {
  Serial.println("here");
  int i = 0;

  if(!Serial.available()) {
    return;
  }
  while (Serial.available() && i < maxLength) {
    strArray[i] = Serial.read();
    i++;
  }
}