5 #ifndef _SG_PERSPARAM_HXX
6 #define _SG_PERSPARAM_HXX 1
9 class SGPersonalityParameter {
11 SGPersonalityParameter( SGPropertyNode *props, const char *name, T defval )
12 : _var( defval ), _min( defval ), _max( defval ) {
13 SGPropertyNode_ptr node = props->getNode( name );
15 SGPropertyNode_ptr rand_n = node->getNode( "random" );
17 _min = rand_n->getDoubleValue( "min", 0.0 );
18 _max = rand_n->getDoubleValue( "max", 1.0 );
21 _var = _min = _max = getNodeValue( props, name, defval );
25 SGPersonalityParameter<T> &operator=( T v ) { _var = v; return *this; }
26 SGPersonalityParameter<T> &operator+=( T v ) { _var += v; return *this; }
27 SGPersonalityParameter<T> &operator-=( T v ) { _var -= v; return *this; }
28 T shuffle() { return ( _var = _min + sg_random() * ( _max - _min ) ); }
29 T value() const { return _var; }
30 T getNodeValue( SGPropertyNode *props, const char *name, T defval ) const;
31 operator T() const { return _var; }
39 #endif // _SG_PERSPARAM_HXX