commit 2e7c7abf4e43af6b0ef2a855216ef8800043c52b
Author: Leszek Koltunski <leszek@distorted.org>
Date:   Mon Oct 17 16:04:28 2016 +0100

    swap the 2nd and the 3rd parameters in the WAVE effect and improve comments for the WAVE user API.

diff --git a/src/main/java/org/distorted/examples/effects3d/Effects3DEffect.java b/src/main/java/org/distorted/examples/effects3d/Effects3DEffect.java
index 598ad74..25f72be 100644
--- a/src/main/java/org/distorted/examples/effects3d/Effects3DEffect.java
+++ b/src/main/java/org/distorted/examples/effects3d/Effects3DEffect.java
@@ -133,8 +133,8 @@ public class Effects3DEffect implements SeekBar.OnSeekBarChangeListener
                               break;
       case WAVE             : float l2 = mAct.get().getWidth()/50.0f;
                               float x2 = (mInter[0]-50)*l2;
-                              float y2 = (mInter[1]-50)*180 / 50;
-                              float z2 = (mInter[2]-50)*l2;
+                              float y2 = (mInter[1]-50)*l2;
+                              float z2 = (mInter[2]-50)*180 / 50;
                               float w2 = (mInter[3]-50)*180 / 50;
                               mSta4.set(x2,y2,z2,w2);
                               break;