/*
Arduino Sketcher
Created by Nate Edison
5/14/2015
This is a homemade interface designed to act
as a device to draw with an Arduino sketch
Processing code
*/

//set up variables
const int LEDred = 6; //display the LED as red to know what color using
const int LEDgreen = 5; //display the LED as green to know what color using
const int LEDblue = 4; //display the LED as blue to know what color using
const int resetButton = 3; //reset the canvas
const int blueButton = 2; //change the color to blue
const int greenButton = 8; //change the color to green
const int redButton = 7;//change the color to red
byte xVal = 0;
byte yVal = 255;
void setup() {
  //set up our outputs
  pinMode(LEDred, OUTPUT);
  pinMode(LEDgreen, OUTPUT);
  pinMode(LEDblue, OUTPUT);

  //set up our inputs
  pinMode(resetButton, INPUT);
  pinMode(blueButton, INPUT);
  pinMode(greenButton, INPUT);
  pinMode(redButton, INPUT);

  Serial.begin(9600); //sets up the code so it can
  //use serial comuniaciton
}

void loop() {
  //Set up variables for our drawing controls
  int knob = analogRead(A0);
  int softPot = analogRead(A1);

  //Serial.println("Knob reads:");
  //Serial.println(knob);
  int knobOutput = map(knob, 0, 1023, 0, 255);
  int softPotOutput = map(softPot, 0, 1023, 0, 255);
  //analogWrite(blue, blueLight);
  //Serial.println("mapping:");
  //Serial.println(blueLight);
  //delay(1000);
  //These were used in accordance with a single blue LED
  //to find where values ranged over the analog sensors.

  int blueButtonState = digitalRead(blueButton);
  // sets up the variable to read the output of the blue button

  if (blueButtonState == HIGH) {
    colorBlue(); //calls the function to make the color blue
  }

  int greenButtonState = digitalRead(greenButton);
  //sets up the variable to read the output of the green button

  if (greenButtonState == HIGH) {
    colorGreen(); //calls the function to make the color green
  }

  int redButtonState = digitalRead(redButton);
  //sets up the variable to read the output of the red button
  if (redButtonState == HIGH) {
    colorRed(); // calls the function to make the color red
  }

  if ((redButtonState == HIGH) && (blueButtonState == HIGH)) {
    colorMagenta(); //calls the function to make the color magenta
  }

  if ((redButtonState == HIGH) && (greenButtonState == HIGH)) {
    colorYellow();
  }

  if ((blueButtonState == HIGH) && (greenButtonState == HIGH)) {
    colorCyan();
  }

  int resetButtonState = digitalRead(resetButton);
  //sets up the variable to read teh output of the reset button

  if (resetButtonState == HIGH) {
    reset(); //calls the function to reset the drawing
  }

  if ((knobOutput >= 0) && (knobOutput <= 70)) {
    moveleft(); //calls the function to move the line to the left
  }

  if ((knobOutput >= 131) && (knobOutput <= 255)) {
    moveright(); // calls the function to move the line right
  }

  if ((softPotOutput >= 4) && (softPotOutput <= 116)) {
    moveup(); //calls the function to move the line up.
  }
  if ((softPotOutput >= 124) && (softPotOutput <= 255)) {
    movedown(); // calls the function to move the line down
  }
}

void colorBlue() { //turns the LED and the color of drawing blue
  digitalWrite(LEDgreen, LOW);
  digitalWrite(LEDred, LOW);
  digitalWrite(LEDblue, HIGH);
  Serial.write('c');
  Serial.write(0);
  Serial.write(0);
  Serial.write(255);
}

void colorGreen() { //turns the LED and the color of drawing green
  digitalWrite(LEDblue, LOW);
  digitalWrite(LEDred, LOW);
  digitalWrite(LEDgreen, HIGH);
  Serial.write('c');
  Serial.write(0);
  Serial.write(255);
  Serial.write(0);
}

void colorRed() { //turns the LED and the color of drawing red
  digitalWrite(LEDblue, LOW);
  digitalWrite(LEDgreen, LOW);
  digitalWrite(LEDred, HIGH);
  Serial.write('c');
  Serial.write(255);
  Serial.write(0);
  Serial.write(0);
}

void colorMagenta() { //turns the LED and the color of drawing magenta
  digitalWrite(LEDblue, HIGH);
  digitalWrite(LEDred, HIGH);
  digitalWrite(LEDgreen, LOW);
  Serial.write('c');
  Serial.write(255);
  Serial.write(0);
  Serial.write(255);
}

void colorYellow() { //turns the LED and the color of drawing yellow
  digitalWrite(LEDblue, LOW);
  digitalWrite(LEDgreen, HIGH);
  digitalWrite(LEDred, HIGH);
  Serial.write('c');
  Serial.write(255);
  Serial.write(255);
  Serial.write(0);
}

void colorCyan() { //turns the LED and the color of drawing cyan
  digitalWrite (LEDblue, HIGH);
  digitalWrite(LEDgreen, HIGH);
  digitalWrite(LEDred, LOW);
  Serial.write('c');
  Serial.write(0);
  Serial.write(255);
  Serial.write(255);
}

void reset() { // resets the canvas
  Serial.write('r');
  xVal = 0;
  yVal = 255;
}

void moveleft() { //moves the line left
  Serial.write('d');
  xVal = xVal -= 1;
  Serial.write(xVal);
  Serial.write(yVal);
  delay(100);
}

void moveright() { // moves the line right
  Serial.write('d');
  xVal = xVal += 1;
  Serial.write(xVal);
  Serial.write(yVal);
  delay(100);
}

void moveup() { // moves the line up
  Serial.write('d');
  Serial.write(xVal);
  yVal = yVal -= 1;
  Serial.write(yVal);
  delay(100);
}

void movedown() { //moves the line down
  Serial.write('d');
  Serial.write(xVal);
  yVal = yVal += 1;
  Serial.write (yVal);
  delay(100);
}