added sine test sketch

SimpleSineDrawing/SimpleSineDrawing.pde

@@ -0,0 +1,35 @@
+int speed = 2; // how fast it scrolls across the screen (0 is not moving)
+float periods = 3; // how many humps the sine wave has
+float waveHeight;  // the height of the wave
+
+void setup()
+{
+  size(512,256);
+  background(0);
+
+  waveHeight = height/2;
+}
+
+
+void draw()
+{
+  //periods = map(mouseX, 0,width, 1, 20);
+
+  //waveHeight = height/2 * sin(frameCount/20);
+
+  background(0);
+  fill(255);
+  stroke(255);
+
+  for (int index=0; index < width; index++)
+  {
+    int movedIndex = index + (frameCount*speed);
+    movedIndex = movedIndex % width; // wrap around width
+
+    float heightValue = waveHeight * 
+      sin( map(movedIndex, 0,width, 0, periods*TWO_PI) ) 
+      + waveHeight;
+
+    point(index, heightValue);
+  }
+}