#include <algorithm>
#include <cmath>
+#include <stdexcept>
#include <msp/linal/vector.h>
#include "ray.h"
#include "shape.h"
template<typename T, unsigned D>
inline HyperBox<T, D>::HyperBox(const LinAl::Vector<T, D> &d):
dimensions(d)
-{ }
+{
+ for(unsigned i=0; i<D; ++i)
+ if(dimensions[i]<=T(0))
+ throw std::invalid_argument("HyperBox::HyperBox");
+}
template<typename T, unsigned D>
inline HyperBox<T, D> *HyperBox<T, D>::clone() const