Ok, almost have it working, in my previous, 1 dimensional code this:

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1

Ok, almost have it working, in my previous, 1 dimensional code this:

int XLit = abs(AcX) / (25000/(NUM_LEDS/2));

if(XLit > (NUM_LEDS/2)) {
XLit = NUM_LEDS/2;
}

fill_solid(Xleds,NUM_LEDS,CRGB::Black);

if(AcX < 0) {

for(int xi = 1; xi <= XLit; xi++) {
Xleds[(NUM_LEDS/2)-xi] = CRGB::Green;
}
} else {

for(int xi = 0; xi < XLit; xi++) {
Xleds[(NUM_LEDS/2)+xi] = CRGB::Yellow;
}
}

worked perfectly for having all the positive values on one half of the strip and the negatives on the other half. Heres what i have now:

fill_solid(leds,NUM_LEDS,CRGB::Black);
for( uint8_t x = 0; x < kMatrixWidth; x++) {
for( uint8_t y = 0; y < kMatrixHeight; y++) {

    leds[ XY( AcX/4000, AcY/4000) ] = CRGB::White;
  }
  }

LEDS.show();
}

as is it is, it only shows 1/4 of the data because i think it’s only displaying the positives, how would i implement the other code to get everything to be displayed from the center of my matrix out?

2

What is the range of your AcX and AcY readings? I would map them into a byte (or the matrix size) range first. Like that 4 would represent the middle, 0-3 representing negative and 5-8 representing positive readings.

edit (just a guess and example): Let´s say you read a value between -10000 and +10000. First step: add 10000. Now it´s 0-20000. Next: scale it down to to 0-8 by dividing by 2500. Now you can just use them directly.

leds[ XY( AcX, AcY) ] = …