/*

* Created By: Ankush Verma & Cory Malantonio

* Kushy04@gmail.com

* cgmalantonio@gmail.com

*

* Y- to analog 0

* X+ to analog 1

* Y+ to analog 2

* X- to analog 3

*

*/

int xVal = 0;

int yVal = 0;

int touchX;

int touchY;

int xPos;

int yPos;

int redPin = 11;

int greenPin = 9;

int bluePin = 10;

int rL = 0;

int bL = 0;

int gL = 0;

void setup()

{

pinMode(redPin, OUTPUT);

pinMode(bluePin, OUTPUT);

pinMode(greenPin, OUTPUT);

Serial.begin(38400);

}

void loop()

{

// Set up the analog pins in preparation for reading the Y value

pinMode( A1, INPUT ); // Analog pin 1

pinMode( A3, INPUT ); // Analog pin 3

pinMode( A0, OUTPUT ); // Analog pin 0

digitalWrite( A0, LOW ); // Analog pin 0 as GND connection

pinMode( A2, OUTPUT ); // Analog pin 2

digitalWrite( A2, HIGH ); // Analog pin 2 as +5V connection

yVal = analogRead( 1 ); // Read the Y value

// Set up the analog pins in preparation for reading the Y value

// from the touchscreen

pinMode( A0, INPUT ); // Analog pin 0

pinMode( A2, INPUT ); // Analog pin 2

pinMode( A1, OUTPUT ); // Analog pin 1

digitalWrite( A1, LOW ); // Analog pin 1 as GND connection

pinMode( A3, OUTPUT ); // Analog pin 3

digitalWrite( A3, HIGH ); // Analog pin 3 as +5V connection

xVal = analogRead( 0 ); // Read the x value

//when touchscreen is not pressed it rests at certain coordinates

//this makes sure the coordinates at rest don't get calculated

touchX = xVal;

if( touchX > 20 && touchX < 900 ) {

//// Here is where you need your minimum X value and Range of X

//// (touchX, minimum x, range of x, converts to 0-1024)

xPos = map(touchX, 108.0, 899.0, 0, 1024);

xPos = constrain(xPos, 0, 1024);

}

touchY = yVal;

if( touchY > 20 && touchY < 900 ) {

//// Here is where you need your minimum Y value and Range of Y

//// (touchY, minimum y, range of y, converts to 0-1024)

yPos = map(touchY, 145.0, 892.0, 0, 1024);

yPos = constrain(yPos, 0, 1024);

}

float brightness;

brightness = int (yPos)/1024.0;

//this lovely bit converts 0-1024, into three 255 values

int value = int (xPos);

float RGBslider = (float)value/1024.0;

float redLevel = 128.0 * ( 2 * cos( 2 * PI * (RGBslider + 0.125)));

float greenLevel = 128.0 * ( 2 * cos( 2 * PI * (RGBslider + 0.375)));

float blueLevel = 128.0 * ( 2 * cos( PI * RGBslider));

//allows values of color to be affected by value of brightness

redLevel = redLevel * (brightness);

greenLevel = greenLevel * (brightness);

blueLevel = blueLevel * (brightness);

/*

if (redLevel > 255) redLevel = 255;

if (redLevel < 0) redLevel = 0;

if (greenLevel > 255) greenLevel = 255;

if (greenLevel < 0) greenLevel = 0;

if (blueLevel > 255) blueLevel = 255;

if (blueLevel < 0) blueLevel = 0;

*/

//does same thing as section commented out above

redLevel = constrain(redLevel, 0, 255);

greenLevel = constrain(greenLevel, 0, 255);

blueLevel = constrain(blueLevel, 0, 255);

//rgb led's being used work backwards

//0 = on || 255 = off

//this reverses normal values

rL = 255 - int(redLevel);

bL = 255 - int(blueLevel);

gL = 255 - int(greenLevel);

analogWrite(redPin, rL);

analogWrite(greenPin, gL);

analogWrite(bluePin, bL);

Serial.print(brightness);

Serial.print(":");

Serial.print(rL);

Serial.print(".");

Serial.print(gL);

Serial.print(".");

Serial.print(bL);

Serial.print("-----");

Serial.print(xPos);

Serial.print(" / ");

Serial.println(yPos);

//Serial.print(xPos);

//Serial.println(yPos);

delay(100);

}