hi,

i am trying to read brightness values from a buffer. there is data in the image, but when i try to print the values, i get 0.0 for all pixels. i have a second buffer for which the values are reading. (i have found that there is a much better and shorter way to do this, but i am curious as to why the values aren't registering.)

here is the code:

PGraphics noisePlane;
PGraphics noiseSignal;
PGraphics crossFader;

float noiseScale = 0.02;
float noiseFeatureBrightnessSignal;

void setup()
{
    size(500, 500, P3D);
   
    noisePlane = createGraphics(width/2, height, P3D);
    noiseSignal = createGraphics(width, height, P3D);
    crossFader = createGraphics(width, height, P3D);

    for(int x = 0; x <= width; x ++)
    {
        for(int y = 0; y <= height; y ++)
        {
            float noisePlaneValNoiseSignal = noise(x * noiseScale, y * noiseScale);

            noisePlane.beginDraw();
            noisePlane.stroke(noisePlaneValNoiseSignal * 255);
            noisePlane.point(x, y);
            noisePlane.endDraw();       
        }
    }

    for(int i = 0; i <= 1000; i ++)
    {
        for(int j = 0; j <= 1000; j ++)
        {
            float crossFaderValNoiseSignal = noise(i * noiseScale, j * noiseScale);

            crossFader.beginDraw();
            crossFader.stroke(crossFaderValNoiseSignal * 255);
            crossFader.point(i, j);
            crossFader.endDraw();
        }
    }

//    image(crossFader, 0, 0);

    noiseSignal.beginDraw();
    image(noisePlane, 0, 0);
    pushMatrix();
    translate(width, 0);
    rotateY(PI);
    image(noisePlane, 0, 0);
    popMatrix();
    noiseSignal.endDraw();
   
    image(noiseSignal, 0, 0);
}

void draw()
{   

    noiseSignal.loadPixels();
   
    for(int x = 0; x <= width - 1; x ++)
    {
        for(int y = 0; y <= height - 1; y ++)
        {
            float value = brightness(noiseSignal.pixels[x + width * y]);
           
            println(value);
        }
    }

thanks,

destro