Modify Colors with Arduino

Nightmare_Moon

Hi, I'm fairly new to programming, I've done some MatLab and a little bit of java. I am starting to use Processing and I was reading some tutorials on how to draw shapes. I wanted to draw 4 boxes and have them change colors based on some values extracted from my Arduino Mini (atMega328P)

I have the Arduino set to get values from 4 analog sources, I want to transfer those values to Processing and have the values make boxes change colors.

This is what I have so far for my processing part:

PShape rectangle1;
PShape rectangle2;
PShape rectangle3;
PShape rectangle4;

void setup(){
size(640,480,P2D);
smooth();
rectangle1 = createShape(RECT, 50, 50,100,50);

rectangle2 = createShape(RECT, 175,50,100,50);

rectangle3 = createShape(RECT, 300,50,100,50);

rectangle4 = createShape(RECT, 425,50,100,50);

}

void draw()
  // DRAW THE BOXES THAT REPRESENT EACH CHANNEL AND THEIR RESPONSE TO THE CHANNEL VALUE

  if(channel[0]>799){
  rectangle1.setFill(color(0,255,0));}
  else{
    rectangle1.setFill(color(255,0,0))
  }
  shape(rectangle1);

  shape(rectangle2);
  if(channel[1]>799){
  rectangle2.setFill(color(0,255,0));}
  else{
    rectangle2.setFill(color(255,0,0))
  }


  shape(rectangle3);
  if(channel[2]>799){
  rectangle3.setFill(color(0,255,0));}
  else{
    rectangle3.setFill(color(255,0,0))
  }

  shape(rectangle4);
  if(channel[3]>799){
  rectangle4.setFill(color(0,255,0));}
  else{
    rectangle4.setFill(color(255,0,0))
  }

What I am not sure is how to read the values for the channel array that are going to be transfered tru COM4 from the Arduino.

I am also not sure if that if/else structure would work, I assume it will (I am not sure if it will dynamically work though, like I want the rectangle to change back and forth between red and green, depending on the value obtained from the sensor)

For my arduino code I have the following:

  // Declare the pin assigned to each sensor
const int sensorpin_1 = A0;
const int sensorpin_2 = A1;
const int sensorpin_3 = A2;
const int sensorpin_4 = A3;
const int sensorpin_5 = A6;
int i;
void channelread()
{
  // Declare variables that will store values read from each sensor

float channels[4];

  //read input pins with analog values
  channels[0] = analogRead(sensorpin_1);
  channels[1] = analogRead(sensorpin_2);
  channels[2] = analogRead(sensorpin_3);
  channels[3]= analogRead(sensorpin_4);
  channels[4] = analogRead(sensorpin_5);


  //print value on the serial monitor screen
  Serial.print("C1= "); Serial.print(channels[0]);
  Serial.print(" C2= "); Serial.print(channels[1]);
  Serial.print(" C3= "); Serial.print(channels[2]);
  Serial.print(" C4= "); Serial.print(channels[3]);
  Serial.print(" C5= ");  Serial.println(channels[4]);

  delay(200)
    }
    }

I am not even sure if I should add that text ("C1 =" , C2 = etc. . .) since those are there to make it easier for a human to read if you are observing the serial monitor.