Drunkard's Walk

lilmink

Made this little program as I am learning processing and I am wondering if I can make the stroke that is moving all over the screen opaque at times like intervals or every few seconds.

        int windowX = 500;                 // Should work if window dimensions change
        int windowY = 400;
        float lineStartX = windowX * 0.5;  // Start in the middle of the window
        float lineStartY = windowY * 0.5;
        float endX = 0;                    // Remember where line segment ended
        float endY = 0;
        float maxDev = 5;                  // Max deviation for both x and y
        float bias = 1;                    // Bias the deviation in positive direction

        void setup()
        {
          size(windowX, windowY);
          //frameRate(10);        // Slow it down to see movement better
          background(255);
          strokeWeight(1);
          //noSmooth();           // Turn on to demonstrate that smooth is on by default
        }

        void draw()
        {
          stroke(0);


          endX = random(lineStartX - maxDev, lineStartX + maxDev + bias) % width;
          endY = random(lineStartY - maxDev, lineStartY + maxDev + bias) % height;

          line(lineStartX, lineStartY, endX, endY);  // Draw line from start to end

          lineStartX = endX;    // Remember where we ended up so we can start there
          lineStartY = endY;    // next time
        }

TfGuy44

Simply have the stroke depend on the time:

stroke( ((millis()%4000)<2000)?(0):(255) );

or:

stroke( map(millis()%6000,0,6000,0,255) );