Problem with reverse meteor rain - Arduino

RE: Problem with reverse meteor rain

Anonymous — Fri, 17 Feb 2023 02:50:19 +0000

BiiiG THX for the "reverse"-Solution!!!

RE: Problem with reverse meteor rain

Hans — Tue, 15 Jun 2021 11:39:52 +0000

Awesome - good to hear that worked! 😁 👍

RE: Problem with reverse meteor rain

Anonymous — Mon, 14 Jun 2021 21:52:47 +0000

Posted by: @hans

I've added you video here for future reference, I hope that's OK. (as a new user you cannot yet upload video's - apologies for the inconvenience)
210
First off, in the original code I count to NUM_LEDS+NUM_LEDS intentionally so it exceeds the length of the LED strip and all LEDs can fade.
(the 3rd line, the for-loop, in the effect code)

Now ... working in reverse would cause some extra issues to look at (like negative led numbers).
So I'd probably keep the original code the same, and add functions that handle the setPixel (setReversePixel) and fadeToBlack (reverseFadeToBlack) in reverse.
Something like this (untested - I hope I didn't make any typos):
void meteorRain(byte red, byte green, byte blue, byte meteorSize, byte meteorTrailDecay, boolean meteorRandomDecay, int SpeedDelay) {  
  setAll(0,0,0);
 
  for(int i = 0; i < NUM_LEDS+NUM_LEDS; i++) {
     
    // fade brightness all LEDs one step
    for(int j=0; j5) ) {
        reverseFadeToBlack(j, meteorTrailDecay );        
      }
    }
   
    // draw meteor
    for(int j = 0; j < meteorSize; j++) {
      if( ( i-j =0) ) {
        setReversePixel(i-j, red, green, blue);
      }
    }
   
    showStrip();
    delay(SpeedDelay);
  }
}

void setReversePixel(int Pixel, byte red, byte green, byte blue) {
  int reversePixel = NUM_LEDS-Pixel;
  
  if( (reversePixel>=0) && (reversePixel=0) && (reversePixel> 16;
    g = (oldColor & 0x0000ff00UL) >> 8;
    b = (oldColor & 0x000000ffUL);

    r=(r<=10)? 0 : (int) r-(r*fadeValue/256);
    g=(g<=10)? 0 : (int) g-(g*fadeValue/256);
    b=(b<=10)? 0 : (int) b-(b*fadeValue/256);
   
    strip.setPixelColor(ledNo, r,g,b);
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   leds.fadeToBlackBy( fadeValue );
 #endif  
}

it worked flawslessly!

Thank you very much for the fast response!

RE: Problem with reverse meteor rain

Hans — Sun, 13 Jun 2021 11:02:51 +0000

I've added you video here for future reference, I hope that's OK. (as a new user you cannot yet upload video's - apologies for the inconvenience)

210

First off, in the original code I count to NUM_LEDS+NUM_LEDS intentionally so it exceeds the length of the LED strip and all LEDs can fade.
(the 3rd line, the for-loop, in the effect code)

Now ... working in reverse would cause some extra issues to look at (like negative led numbers).
So I'd probably keep the original code the same, and add functions that handle the setPixel (setReversePixel) and fadeToBlack (reverseFadeToBlack) in reverse.
Something like this (untested - I hope I didn't make any typos):

void meteorRain(byte red, byte green, byte blue, byte meteorSize, byte meteorTrailDecay, boolean meteorRandomDecay, int SpeedDelay) {  
  setAll(0,0,0);
 
  for(int i = 0; i < NUM_LEDS+NUM_LEDS; i++) {
     
    // fade brightness all LEDs one step
    for(int j=0; j5) ) {
        reverseFadeToBlack(j, meteorTrailDecay );        
      }
    }
   
    // draw meteor
    for(int j = 0; j < meteorSize; j++) {
      if( ( i-j =0) ) {
        setReversePixel(i-j, red, green, blue);
      }
    }
   
    showStrip();
    delay(SpeedDelay);
  }
}

void setReversePixel(int Pixel, byte red, byte green, byte blue) {
  int reversePixel = NUM_LEDS-Pixel;
  
  if( (reversePixel>=0) && (reversePixel=0) && (reversePixel> 16;
    g = (oldColor & 0x0000ff00UL) >> 8;
    b = (oldColor & 0x000000ffUL);

    r=(r<=10)? 0 : (int) r-(r*fadeValue/256);
    g=(g<=10)? 0 : (int) g-(g*fadeValue/256);
    b=(b<=10)? 0 : (int) b-(b*fadeValue/256);
   
    strip.setPixelColor(ledNo, r,g,b);
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   leds.fadeToBlackBy( fadeValue );
 #endif  
}

Problem with reverse meteor rain

Anonymous — Sat, 12 Jun 2021 13:08:15 +0000

Good day for everyone! i try to do a reverse meteor rain effect in arduino, based on some codes that are on the page, it runs well but at the end the meteor doesnt fade to black, ill share the code and a video

Thanks for stoping by!

https://odysee.com/@Gutss:6/video:3

void meteorRain(byte red, byte green, byte blue, byte meteorSize, byte meteorTrailDecay, boolean meteorRandomDecay, int SpeedDelay) {  
  setAll(0,0,0);
 
  for(int i = NUM_LEDS-1; i>=meteorSize; i--) {
   
   
    // fade brightness all LEDs one step
    for(int j=0; j5) ) {
        fadeToBlack(j, meteorTrailDecay );        
      }
    }
   
    // draw meteor
    for(int j = 0; j < meteorSize; j++) {
      if( i-j>0 ) {
        setPixel(i-j, red, green, blue);
      }
    }
   
    showStrip();
    delay(SpeedDelay);
  }
}

void fadeToBlack(int ledNo, byte fadeValue) {
 #ifdef ADAFRUIT_NEOPIXEL_H
    // NeoPixel
    uint32_t oldColor;
    uint8_t r, g, b;
    int value;
   
    oldColor = strip.getPixelColor(ledNo);
    r = (oldColor & 0x00ff0000UL) >> 16;
    g = (oldColor & 0x0000ff00UL) >> 8;
    b = (oldColor & 0x000000ffUL);

    r=(r<=10)? 0 : (int) r-(r*fadeValue/256);
    g=(g<=10)? 0 : (int) g-(g*fadeValue/256);
    b=(b<=10)? 0 : (int) b-(b*fadeValue/256);
   
    strip.setPixelColor(ledNo, r,g,b);
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   leds.fadeToBlackBy( fadeValue );
 #endif  
}
void colorWipe(byte red, byte green, byte blue, int SpeedDelay) {
  for(int i = NUM_LEDS+NUM_LEDS; i > 0; i--) {
      setPixel(i, red, green, blue);
      showStrip();
      delay(SpeedDelay);
  }
}