SCVector operator-(const SCVector& v1, const SCVector& v2){
int min_dim = min_dimension(v1,v2);
SCVector x(min_dim);
for(int i=0;i<min_dim;i++)
x(i) = v1(i) - v2(i);
return x;
}
double dot(const SCVector& u, const SCVector& v){
double sum = 0.0;
int min_dim = min_dimension(u,v);
for(int i=0;i<min_dim;i++)
sum += u(i)*v(i);
return sum;
}
void GESphere::drawVisual(vector_t unit_size)
{
glColor3ub(RED(bg_color), GREEN(bg_color), BLUE(bg_color));
glutSolidSphere(radius * min_dimension(unit_size), 100, 100);
}
