// GeometryDemo.cpp
// NKU CSC 480
// --------------------------------------------------------
// Just a demo of some of the Vector3 and Point3 operations
// in Geometry.h.  
// --------------------------------------------------------

#include "Geometry.h"

using namespace std ;
using namespace csc480 ;


void glSomething3dv( const double* ar )
// A "legacy" C function that expects points or vectors as a C array of doubles.
{
    cout << "glSomething3dv( " << ar[0] << " " << ar[1] << " " << ar[2] << " )" << endl ;
}



int main()
{
    // Defining vectors and points.
    Vector3 u(-3,4,1), v(2,3,4) ;
    Point3  pt(10,4,-1) ;

    // I/O of vectors.
    Vector3 w ;
    cout << "Enter a 3D vector: " ;
    cin >> w ;
    cout << "You entered vector " << w << endl << endl ;

    // I/O of points.
    Point3 q ;
    cout << "Enter a 3D point: " ;
    cin >> q ;
    cout << "You entered point" << q << endl << endl ;

    // Element access
    pt.x= q.x + 2 ;
    u.dx= v.dx + 2 ;
    u[2]++ ;

    // Arithmetic
    Vector3 a= 2 * (u ^ v ) + ( w *u  ) * w ;
    Vector3 ahat= normalize( a ) ;
    Point3  r= pt + 2*(u-v) ;
    cout << "a = " << a << endl ;
    cout << "ahat = " << ahat << endl ; 
    cout << "r = " << r << endl ;

    // You can use anonymous constructors as literals.
    a+= Vector3( 3,4,5 ) ^ Vector3( -9,10,-3) ;

    // Pass as C array of doubles.
    glSomething3dv( u.asArray() ) ;
    glSomething3dv( pt.asArray() ) ;

    // When you absolutely need to treat a point as a vector
    cout << q.asVector() << endl ;

    // When you absolutely need to treat a vector as a point
    cout << w.asPoint() << endl ;
   
    return 0 ;
}