qvm/test/cross_test.cpp

// Copyright 2008-2024 Emil Dotchevski and Reverge Studios, Inc.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifdef BOOST_QVM_TEST_SINGLE_HEADER
#   include BOOST_QVM_TEST_SINGLE_HEADER
#else
#   include <boost/qvm/vec_operations.hpp>
#   include <boost/qvm/vec_access.hpp>
#   include <boost/qvm/mat_access.hpp>
#   include <boost/qvm/vec_operations3.hpp>
#   include <boost/qvm/vec.hpp>
#endif

#include "test_qvm_vector.hpp"
#include "test_qvm_matrix.hpp"
#include "gold.hpp"

namespace
    {
    template <class T,class U> struct same_type_tester;
    template <class T> struct same_type_tester<T,T> { };
    template <class T,class U> void test_same_type( T, U ) { same_type_tester<T,U>(); }
    }

int
main()
    {
    using namespace boost::qvm;

        {
        test_qvm::vector<V1,3> x(42,1);
        test_qvm::vector<V1,3> y=x*2;
        test_qvm::matrix<M1,3,3> m;
        A00(m) = 0;
        A01(m) = -A2(x);
        A02(m) = A1(x);
        A10(m) = A2(x);
        A11(m) = 0;
        A12(m) = -A0(x);
        A20(m) = -A1(x);
        A21(m) = A0(x);
        A22(m) = 0;
            {
            test_same_type(x,cross(x,y));
            test_qvm::vector<V1,3> c=cross(x,y);
            test_qvm::multiply_mv(c.b,m.a,y.a);
            BOOST_QVM_TEST_EQ(c.a,c.b);
            }
            {
            test_qvm::vector<V2,3> c=cross(vref(x),y);
            test_qvm::multiply_mv(c.b,m.a,y.a);
            BOOST_QVM_TEST_EQ(c.a,c.b);
            }
            {
            test_qvm::vector<V2,3> c=cross(x,vref(y));
            test_qvm::multiply_mv(c.b,m.a,y.a);
            BOOST_QVM_TEST_EQ(c.a,c.b);
            }
        }

        {
        test_qvm::vector<V1,2> x(42,1);
        test_qvm::vector<V1,2,int> y(43,1);
        float r = cross(x,y);
        BOOST_QVM_TEST_EQ(r, x.a[0]*y.a[1] - x.a[1]*y.a[0]);
        }

    return boost::report_errors();
    }