Circles drawing differently in active and static modes

Processing Beginners
4

Hello,

I believe this is due to the smoothing that is applied each frame and is not related to transparency.

Code to visualize this:

// Smooth and anti- aliasing
// v1.0.0
// GLV 2022-06-28

PImage img; 

void setup() 
  {
  size(650, 650);
  background(255); // Try (0)
  smooth(2);    //Default. Try other values!
  //noSmooth(); // Try it with this!
  frameRate(1); // Slow things down to visualize
  }
  
void draw() 
  {
  noStroke();
  fill(255, 0, 0);
  circle(15, 15, 25);
  img = get(0, 0, 30, 30); // gets a rectangular section of image
  
  translate(30, 30);
  // Magnifies 20x
  int m = 20;
  for(int y = 0; y< img.height; y++)
    {
    for(int x = 0; x< img.width; x++)
      {
      int c = img.pixels[x+y*img.width];
      fill(c);
      rect(x*m, y*m, m, m);
      }
    }
  }
  
// Save a frame
void keyPressed()
  {
  saveFrame(str(frameCount) + ".png");
  }

image
image652×682 3.01 KB

References:

:)