diff --git a/src/com/homelinux/holtrop/opengltest/MyRenderer.java b/src/com/homelinux/holtrop/opengltest/MyRenderer.java
index b5e89e0..09aa6c8 100644
--- a/src/com/homelinux/holtrop/opengltest/MyRenderer.java
+++ b/src/com/homelinux/holtrop/opengltest/MyRenderer.java
@@ -28,6 +28,7 @@ public class MyRenderer implements GLSurfaceView.Renderer
     private float m_modelview[] = new float[16];
     private int m_width;
     private int m_height;
+    private float m_aspect = 1.0f;
     private float m_x = 0.0f;
     private float m_y = 0.0f;
 
@@ -154,20 +155,13 @@ public class MyRenderer implements GLSurfaceView.Renderer
     {
         m_width = width;
         m_height = height;
+        m_aspect = width / (float) height;
 
         GLES20.glViewport(0, 0, width, height);
 
-        if (width < height)
-        {
-            Matrix.orthoM(m_proj_matrix, 0, -1, 1,
-                    -height / (float) width, height / (float) width, 1, -1);
-        }
-        else
-        {
-            Matrix.orthoM(m_proj_matrix, 0,
-                    -width / (float) height, width / (float) height,
-                    -1, 1, 1, -1);
-        }
+        Matrix.orthoM(m_proj_matrix, 0,
+                -m_aspect, m_aspect,
+                -1, 1, 1, -1);
 
         GLES20.glUseProgram(m_program);
 
@@ -180,7 +174,7 @@ public class MyRenderer implements GLSurfaceView.Renderer
     {
         if (e.getAction() == MotionEvent.ACTION_DOWN)
         {
-            float x = (e.getX() / (float) m_width) * 2.0f - 1.0f;
+            float x = m_aspect * ((e.getX() / (float) m_width) * 2.0f - 1.0f);
             float y = -((e.getY() / (float) m_height) * 2.0f - 1.0f);
 
             m_x = x;