Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Topics/Motion/Brownian/Brownian.pde

@@ -0,0 +1,48 @@
+/**
+ * Brownian motion. 
+ * 
+ * Recording random movement as a continuous line. 
+ */
+ 
+int num = 2000;
+int range = 6;
+
+float[] ax = new float[num];
+float[] ay = new float[num]; 
+
+
+void setup() 
+{
+  size(640, 360);
+  for(int i = 0; i < num; i++) {
+    ax[i] = width/2;
+    ay[i] = height/2;
+  }
+  frameRate(30);
+}
+
+void draw() 
+{
+  background(51);
+  
+  // Shift all elements 1 place to the left
+  for(int i = 1; i < num; i++) {
+    ax[i-1] = ax[i];
+    ay[i-1] = ay[i];
+  }
+
+  // Put a new value at the end of the array
+  ax[num-1] += random(-range, range);
+  ay[num-1] += random(-range, range);
+
+  // Constrain all points to the screen
+  ax[num-1] = constrain(ax[num-1], 0, width);
+  ay[num-1] = constrain(ay[num-1], 0, height);
+  
+  // Draw a line connecting the points
+  for(int i=1; i<num; i++) {    
+    float val = float(i)/num * 204.0 + 51;
+    stroke(val);
+    line(ax[i-1], ay[i-1], ax[i], ay[i]);
+  }
+}