Attempting to recreate "Falling Rain" from the Matrix for OLED - having issues

Projects Programming
1

Hello,

I was trying to create that digital rain seen in the matrix movies, and the only example I could find online of that code was this YouTube video (its pretty bad in the sense the OA didn't post the code). I basically just tried to freeze frame it in order to best copy the code.

The main issue I seem to be having is at the end of the code:

"'y' cannot be used as a function...."

My goal will be to run it on an Arduino Nano with this OLED:

UCTRONICS 0.96 Inch OLED Module 12864 128x64 Yellow Blue SSD1306 Driver I2C Serial Self-Luminous Display Board for Arduino Raspberry PI

Here is the code :slight_smile:

#include <TFT_eSPI.h> // graphics and font library for 5733 driver chip
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI(); //Invoke library, pins defined in user_setup.h


const int BUTTON=16;
const int LED=5;
int timedelay=25;

int height=160;
int width=120;
int y(120);
int x;
int temp;
char z;

byte randNumber; // if your random number
byte prevRand = 0; //could be initialized


void setup(void) {
  tft.init();
  tft.setRotation(0);
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_GREEN, TFT_BLACK); //adding a black 

  tft.setTextSize(1);
Serial.begin(57600);

pinMode(BUTTON,INPUT);
pinMode(LED, OUTPUT); 

  for (x=0;x<width;x=x+8)
    {
          temp=random(0,height/8)*8;

          do
          {
            y(x)=random(0,height/8)*8;
           ) while (temp!=y(x));
  )
    
)
void loop() (

  
for (x=0;x<width;x=x+8)
(


  temp = random(0,10):
                  if (temp <= 2)
                    z=('0' + random(0,10));
                  else if (temp <= 4)
                    z=('a' + random(0,27));
                  else if (temp <= 6)
                    z=('A' + random(0,27));
                  else 
                    z=(' ' + random(1,220));

if (x ==16)
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  else if (x ==48)
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  else if (x ==96)
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  else
   tft.setTextColor(TFT_GREEN, TFT_BLACK);

     tft.setCursor(x,(/x));
    tft.print(z);


  temp=y(x)=16;

if (temp < 0)//When there is negative value
      temp= temp + height;
  else if (temp >= height)
      temp=0;

   tft.setCursor(x,temp);
      tft.print(z);

   temp=y)(x)=80;
if (temp < 0)//When there is negative 
      temp= temp + height;
  else if (temp >= height)
      temp=0;

  tft.setCursor(x,temp);
tft.print(" ");
temp=y(x)+8;
if (temp < 0) //When there is negative value
        temp= temp + height;
  else if (temp >= height)
      temp=0;

y(x)=temp;
  delay(6);
  )

                    
)

I would greatly appreciate any help or tips on how to get this working.

Thanks!

2

Here is your code after Auto Formatting in the IDE

#include <TFT_eSPI.h> // graphics and font library for 5733 driver chip
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI(); //Invoke library, pins defined in user_setup.h


const int BUTTON = 16;
const int LED = 5;
int timedelay = 25;

int height = 160;
int width = 120;
int y(120);
int x;
int temp;
char z;

byte randNumber; // if your random number
byte prevRand = 0; //could be initialized


void setup(void)
{
  tft.init();
  tft.setRotation(0);
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_GREEN, TFT_BLACK); //adding a black
  tft.setTextSize(1);
  Serial.begin(57600);
  pinMode(BUTTON, INPUT);
  pinMode(LED, OUTPUT);
  for (x = 0; x < width; x = x + 8)
  {
    temp = random(0, height / 8) * 8;
    do
    {
      y(x) = random(0, height / 8) * 8;
      ) while (temp != y(x));
        )
        )
        void loop() (
          for (x = 0; x < width; x = x + 8)
          (
            temp = random(0, 10) :
                     if (temp <= 2)
                       z = ('0' + random(0, 10));
                else if (temp <= 4)
                z = ('a' + random(0, 27));
                  else if (temp <= 6)
                  z = ('A' + random(0, 27));
                    else
                      z = (' ' + random(1, 220));
                      if (x == 16)
                      tft.setTextColor(TFT_WHITE, TFT_BLACK);
                      else if (x == 48)
                        tft.setTextColor(TFT_WHITE, TFT_BLACK);
                        else if (x == 96)
                          tft.setTextColor(TFT_WHITE, TFT_BLACK);
                          else
                            tft.setTextColor(TFT_GREEN, TFT_BLACK);
                            tft.setCursor(x, ( / x));
                              tft.print(z);
                              temp = y(x) = 16;
                              if (temp < 0)//When there is negative value
                              temp = temp + height;
                              else if (temp >= height)
                                temp = 0;
                                tft.setCursor(x, temp);
                                tft.print(z);
                                temp = y)(x) = 80;
                              if (temp < 0)//When there is negative
                                temp = temp + height;
                                else if (temp >= height)
                                  temp = 0;
                                  tft.setCursor(x, temp);
                                  tft.print(" ");
                                  temp = y(x) + 8;
                                  if (temp < 0) //When there is negative value
                                    temp = temp + height;
                                    else if (temp >= height)
                                      temp = 0;
                                      y(x) = temp;
                                      delay(6);
                                      )
                                      )

Note how odd it looks ?
Is something missing from what you posted ?

As to the error
instead of

int y(120);

you probably meant

int y[120];

and that relates throughout the sketch as posted