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/** @file
* @brief Operator functions over (NR::Point, NR::Matrix)
*/
#ifndef SEEN_NR_POINT_MATRIX_OPS_H
#define SEEN_NR_POINT_MATRIX_OPS_H
#include "libnr/nr-point.h"
#include "libnr/nr-matrix.h"
namespace NR {
inline Point operator*(Point const &v, Matrix const &m)
{
#if 1 /* Which code makes it easier to see what's happening? */
NR::Point const xform_col0(m[0],
m[2]);
NR::Point const xform_col1(m[1],
m[3]);
NR::Point const xlate(m[4], m[5]);
return ( Point(dot(v, xform_col0),
dot(v, xform_col1))
+ xlate );
#else
return Point(v[X] * m[0] + v[Y] * m[2] + m[4],
v[X] * m[1] + v[Y] * m[3] + m[5]);
#endif
}
inline Point &Point::operator*=(Matrix const &m)
{
*this = *this * m;
return *this;
}
} /* namespace NR */
#endif /* !SEEN_NR_POINT_MATRIX_OPS_H */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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