1.1 --- a/demo/descriptor_map_demo.cc	Fri Feb 08 09:56:46 2008 +0000
     1.2 +++ b/demo/descriptor_map_demo.cc	Fri Feb 08 10:18:55 2008 +0000
     1.3 @@ -61,7 +61,7 @@
     1.4      : descriptor(_graph), center(_center), radius(_radius) {}
     1.5  
     1.6    Value operator[](const Key& key) const {
     1.7 -    double angle = descriptor[key] * 2 * M_PI 
     1.8 +    double angle = descriptor[key] * 2 * PI 
     1.9        / double(descriptor.inverse().size());
    1.10      double x = std::cos(angle) * radius + center.x;
    1.11      double y = std::sin(angle) * radius + center.y;