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/*
* Perspective line for 3D perspectives
*
* Authors:
* Maximilian Albert <Anhalter42@gmx.de>
*
* Copyright (C) 2007 authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifndef SEEN_PERSPECTIVE_LINE_H
#define SEEN_PERSPECTIVE_LINE_H
#include "vanishing-point.h"
#include "line-geometry.h"
#include "box3d-context.h"
#include <glib.h>
class SPDesktop;
namespace Box3D {
class PerspectiveLine : public Box3D::Line {
public:
/**
* Create a perspective line starting at 'pt' and pointing in the direction of the
* vanishing point corresponding to 'axis'. If the VP has style VP_FINITE then the
* PL runs through it; otherwise it has the direction specified by the v_dir vector
* of the VP.
*/
PerspectiveLine (NR::Point const &pt, Box3D::Axis const axis, Perspective3D *perspective);
NR::Maybe<NR::Point> intersect (Line const &line); // FIXME: Can we make this return only a NR::Point to remove the extra method meet()?
NR::Point meet (Line const &line);
NR::Point pt_with_given_cross_ratio (NR::Point const &C, NR::Point const &D, double gamma);
NR::Maybe<NR::Point> intersection_with_viewbox (SPDesktop *desktop);
private:
Box3D::Axis vp_dir; // direction of the associated VP
Perspective3D *persp;
};
} // namespace Box3D
/** A function to print out the VanishingPoint (prints the coordinates) **/
/***
inline std::ostream &operator<< (std::ostream &out_file, const VanishingPoint &vp) {
out_file << vp;
return out_file;
}
***/
#endif /* !SEEN_PERSPECTIVE_LINE_H */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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