Changeset 3258 for code/branches/netp6/src

Timestamp:

Jun 30, 2009, 4:24:36 PM (15 years ago)

Author:

scheusso

Message:

see ticket #329

File:

• code/branches/netp6/src/util/Math.cc (modified) (1 diff)

code/branches/netp6/src/util/Math.cc

@@ -136 +136 @@
                 return orxonox::Vector2(0, 1);
         }
-
-        float angle = acos(clamp<float>(myorthonormal.dotProduct(projection) / projectionlength, -1, 1));
-
+      
+        float cos_value = clamp<float>(myorthonormal.dotProduct(projection) / projectionlength, -1, 1);
+        float sin_value = sqrt( 1 - cos_value*cos_value );
+      
         if ((mydirection.crossProduct(myorthonormal)).dotProduct(distance) > 0)
-            return orxonox::Vector2(sin(angle), cos(angle));
-        else
-            return orxonox::Vector2(-sin(angle), cos(angle));
+            return orxonox::Vector2( sin_value, cos_value );
+        else
+            return orxonox::Vector2( -sin_value, cos_value );
     }