java/examples/Basics/Transform/Rotate/Rotate.pde

@@ -0,0 +1,36 @@
+/**
+ * Rotate. 
+ * 
+ * Rotating a square around the Z axis. To get the results
+ * you expect, send the rotate function angle parameters that are
+ * values between 0 and PI*2 (TWO_PI which is roughly 6.28). If you prefer to 
+ * think about angles as degrees (0-360), you can use the radians() 
+ * method to convert your values. For example: scale(radians(90))
+ * is identical to the statement scale(PI/2). 
+ */
+
+float angle;
+float jitter;
+
+void setup() {
+  size(200, 200);
+  smooth();
+  noStroke();
+  fill(255);
+  rectMode(CENTER);
+  frameRate(30);
+}
+
+void draw() {
+  background(102);
+
+  // during even-numbered seconds (0, 2, 4, 6...)
+  if (second() % 2 == 0) {  
+    jitter = random(-0.1, 0.1);
+  }
+  angle = angle + jitter;
+  float c = cos(angle);
+  translate(width/2, height/2);
+  rotate(c);
+  rect(0, 0, 115, 115);   
+}

java/examples/Basics/Transform/Rotate/applet/Rotate.java

@@ -0,0 +1,58 @@
+import processing.core.*; 
+
+import java.applet.*; 
+import java.awt.*; 
+import java.awt.image.*; 
+import java.awt.event.*; 
+import java.io.*; 
+import java.net.*; 
+import java.text.*; 
+import java.util.*; 
+import java.util.zip.*; 
+import java.util.regex.*; 
+
+public class Rotate extends PApplet {
+
+/**
+ * Rotate. 
+ * 
+ * Rotating a square around the Z axis. To get the results
+ * you expect, send the rotate function angle parameters that are
+ * values between 0 and PI*2 (TWO_PI which is roughly 6.28). If you prefer to 
+ * think about angles as degrees (0-360), you can use the radians() 
+ * method to convert your values. For example: scale(radians(90))
+ * is identical to the statement scale(PI/2). 
+ */
+ 
+public void setup()
+{
+  size(200,200);
+  noStroke();
+  fill(255);
+  frameRate(30);
+}
+
+float angle;
+float cosine;
+float jitter;
+
+public void draw()
+{
+  background(102);
+  
+  if(second()%2 == 0){
+    jitter = (random(-0.1f, 0.1f));
+  }
+  angle = angle + jitter;
+  cosine = cos(angle);
+  
+  translate(width/2, height/2);
+  rotate(cosine);
+  rectMode(CENTER);
+  rect(0, 0, 115, 115);   
+}
+
+  static public void main(String args[]) {
+    PApplet.main(new String[] { "Rotate" });
+  }
+}

java/examples/Basics/Transform/Rotate/applet/Rotate.pde

@@ -0,0 +1,38 @@
+/**
+ * Rotate. 
+ * 
+ * Rotating a square around the Z axis. To get the results
+ * you expect, send the rotate function angle parameters that are
+ * values between 0 and PI*2 (TWO_PI which is roughly 6.28). If you prefer to 
+ * think about angles as degrees (0-360), you can use the radians() 
+ * method to convert your values. For example: scale(radians(90))
+ * is identical to the statement scale(PI/2). 
+ */
+ 
+void setup()
+{
+  size(200,200);
+  noStroke();
+  fill(255);
+  frameRate(30);
+}
+
+float angle;
+float cosine;
+float jitter;
+
+void draw()
+{
+  background(102);
+  
+  if(second()%2 == 0){
+    jitter = (random(-0.1, 0.1));
+  }
+  angle = angle + jitter;
+  cosine = cos(angle);
+  
+  translate(width/2, height/2);
+  rotate(cosine);
+  rectMode(CENTER);
+  rect(0, 0, 115, 115);   
+}