# How would I modify this code to change the output of the code

**URL:** <https://discourse.processing.org/t/how-would-i-modify-this-code-to-change-the-output-of-the-code/19085>\
**Category:** Processing for Android\
**Created:** [March 27, 2020, 3:42pm UTC](https://discourse.processing.org/t/how-would-i-modify-this-code-to-change-the-output-of-the-code/19085 "2020-03-27T15:42:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![senior](https://avatars.discourse-cdn.com/v4/letter/s/c37758/32.png) [@senior](https://discourse.processing.org/u/senior)\
**Post date:** [March 27, 2020, 3:42pm UTC](https://discourse.processing.org/t/how-would-i-modify-this-code-to-change-the-output-of-the-code/19085/1 "2020-03-27T15:42:03Z")

</div>

How would I modify this code to change the output of the code so that the flat grid looks like a U instead of flat. Basically how to do I move up the corner positions of the grid? Thank you for your help

- \</\> code is below:

import processing.serial._;  
import processing.opengl._;

int bgcolor; // Background color  
int fgcolor; // Fill color  
Serial myPort; // The serial port  
int[] serialInArray = new int[225]; // Where we’ll put what we receive  
int[] pastInArray = new int [225];  
float[][] colorTarget = new float[3][255];  
float[][] currentColor = new float[3][255];  
PVector[][] vertices = new PVector[15][15];  
float[] verticesTZ = new float[15];  
float w = 30;  
float ease = 0.75;

int serialCount = 0; // A count of how many bytes we receive  
int xpos, ypos; // Starting position of the ball  
boolean firstContact = false; // Whether we’ve heard from the microcontroller  
int tiempoant;  
int render=0;  
int dif=0;

void setup() {  
size(960, 600, OPENGL); // Stage size  
noStroke(); // No border on the next thing draw

// Print a list of the serial ports, for debugging purposes:  
println(Serial.list());

// I know that the first port in the serial list on my mac  
// is always my FTDI adaptor, so I open Serial.list()[0].  
// On Windows machines, this generally opens COM1.  
// Open whatever port is the one you’re using.

myPort = new Serial(this, Serial.list()[4], 115200);

for (int j = 0; j \< 15; j++) {  
for (int i = 0; i \< 15; i++) {  
vertices[i][j] = new PVector( i_w, j_w, 0);  
}  
}

}

void draw() {

if (render==1) {

```
translate(width/4, 100);
rotateX(0.5);
//rotateX(PI/10);
background(0);
for (int j=0; j<14; j++) {
  beginShape(QUAD_STRIP);
  for (int i=0; i<15; i++) {
      stroke(255);
 
      fill(serialInArray[j*15+i], 0, 0);
      float x = i*width/15;
      float y = j*height/15;
      verticesTZ[i] = serialInArray[j*15+i];
      
      vertices[i][j].z += (verticesTZ[i]-vertices[i][j].z)*ease;
      vertex( vertices[i][j].x, vertices[i][j].y, vertices[i][j].z);
      vertex( vertices[i][j+1].x, vertices[i][j+1].y, vertices[i][j+1].z);
    }
     endShape(CLOSE);
    // println();
  }
  render=0;

```

}  
}

void serialEvent(Serial myPort) {  
// read a byte from the serial port:  
int inByte = myPort.read();  
// if this is the first byte received, and it’s an A,  
// clear the serial buffer and note that you’ve  
// h  
// ad first contact from the microcontroller.  
// Otherwise, add the incoming byte to the array:  
if (firstContact == false) {  
if (inByte == ‘A’) {  
myPort.clear(); // clear the serial port buffer  
firstContact = true; // you’ve had first contact from the microcontroller  
myPort.write(‘A’); // ask for more  
}  
} else {  
// Add the latest byte from the serial port to array:

```
  serialInArray[serialCount] = inByte;

serialCount++;

// If we have 3 bytes:
if (serialCount >= 225 ) {
  println(millis()-tiempoant);
  tiempoant = millis();
  
  render = 1;

  // Send a capital A to request new sensor readings:
  myPort.write('A');
  // Reset serialCount:
  serialCount = 0;
}

```

}  
}

---

<div class="post-metadata">

**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [March 27, 2020, 4:35pm UTC](https://discourse.processing.org/t/how-would-i-modify-this-code-to-change-the-output-of-the-code/19085/2 "2020-03-27T16:35:38Z")

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