[opengtl-commits] [638] add sign, lenght and pi

[subversion@xxxxxxxxxxxxx]

Revision: 638
Author:   cyrille
Date:     2009-03-16 17:22:02 +0100 (Mon, 16 Mar 2009)

Log Message:
-----------
add sign, lenght and pi

Modified Paths:
--------------
    trunk/OpenGTL/OpenShiva/OpenShiva/shivastdlib.shiva


Modified: trunk/OpenGTL/OpenShiva/OpenShiva/shivastdlib.shiva
===================================================================
--- trunk/OpenGTL/OpenShiva/OpenShiva/shivastdlib.shiva	2009-03-16 16:21:45 UTC (rev 637)
+++ trunk/OpenGTL/OpenShiva/OpenShiva/shivastdlib.shiva	2009-03-16 16:22:02 UTC (rev 638)
@@ -19,9 +19,21 @@
 
 library stdlib
 {
+  const float pi = 3.14159265358979323846;
   float fabs( float v )
   {
     if( v < 0) return -v;
     return v;
   }
+  float sign( float v )
+  {
+    if( v < 0 ) return -1;
+    if( v > 0 ) return 1;
+    return v;
+  }
+  float length( float2 v)
+  {
+    v *= v;
+    return sqrt( v[0] + v[1] );
+  }
 }