GPGPU Programming for Games and Science

262 GPGPU Programming for Games and Science

template <int N, typename Real>

Vector <N, Real> Cr os s ( Vector<N, Real> const& v0 , Vector <N, Real> const&v1);

template <int N, typename Real>

Vector <N, Real> UnitCross ( Vector <N, Real> const&v0,

Vector <N, Real> const&v1);

template <int N, typename Real>

Real DotCross ( Vector<N, Real> const& v0 , Vector <N, Real> const&v1,

Vector <N, Real> const&v2);

LISTING 6.7: The vector interface for cross products and dot-cross, where

N is three or four.

The function

Cross computes the cross product of the inputs. If you require a

unit-length orthogonal vector, the cross product can be normalized, a result

returned by function

UnitCross. If the cross product is zero, the function re-

turns the zero vector. Simila