1 #define __VANISHING_POINT_C__
3 /*
4 * Vanishing point for 3D perspectives
5 *
6 * Authors:
7 * Maximilian Albert <Anhalter42@gmx.de>
8 *
9 * Copyright (C) 2007 authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include "vanishing-point.h"
15 #include <iostream>
17 namespace Box3D {
19 // FIXME: We should always require to have both the point (for finite VPs)
20 // and the direction (for infinite VPs) set. Otherwise toggling
21 // shows very unexpected behaviour.
22 // Later on we can maybe infer the infinite direction from the finite point
23 // and a suitable center of the scene. How to go in the other direction?
24 VanishingPoint::VanishingPoint(NR::Point const &pt, NR::Point const &inf_dir, VPState st)
25 : NR::Point (pt), state (st), v_dir (inf_dir) {}
27 VanishingPoint::VanishingPoint(NR::Point const &pt)
28 : NR::Point (pt), state (VP_FINITE), v_dir (0.0, 0.0) {}
30 VanishingPoint::VanishingPoint(NR::Point const &pt, NR::Point const &direction)
31 : NR::Point (pt), state (VP_INFINITE), v_dir (direction) {}
33 VanishingPoint::VanishingPoint(NR::Coord x, NR::Coord y)
34 : NR::Point(x, y), state(VP_FINITE), v_dir(0.0, 0.0) {}
36 VanishingPoint::VanishingPoint(NR::Coord dir_x, NR::Coord dir_y, VPState st)
37 : NR::Point(0.0, 0.0), state(st), v_dir(dir_x, dir_y) {}
39 VanishingPoint::VanishingPoint(NR::Coord x, NR::Coord y, NR::Coord dir_x, NR::Coord dir_y)
40 : NR::Point(x, y), state(VP_INFINITE), v_dir(dir_x, dir_y) {}
42 VanishingPoint::VanishingPoint(VanishingPoint const &rhs) : NR::Point (rhs)
43 {
44 this->state = rhs.state;
45 //this->ref_pt = rhs.ref_pt;
46 this->v_dir = rhs.v_dir;
47 }
50 bool VanishingPoint::is_finite()
51 {
52 return this->state == VP_FINITE;
53 }
55 VPState VanishingPoint::toggle_parallel()
56 {
57 if (this->state == VP_FINITE) {
58 this->state = VP_INFINITE;
59 } else {
60 this->state = VP_FINITE;
61 }
63 return this->state;
64 }
66 void VanishingPoint::draw(Box3D::Axis const axis)
67 {
68 switch (axis) {
69 case X:
70 if (state == VP_FINITE)
71 create_canvas_point(*this, 6.0, 0xff000000);
72 else
73 create_canvas_point(*this, 6.0, 0xffffff00);
74 break;
75 case Y:
76 if (state == VP_FINITE)
77 create_canvas_point(*this, 6.0, 0x0000ff00);
78 else
79 create_canvas_point(*this, 6.0, 0xffffff00);
80 break;
81 case Z:
82 if (state == VP_FINITE)
83 create_canvas_point(*this, 6.0, 0x00770000);
84 else
85 create_canvas_point(*this, 6.0, 0xffffff00);
86 break;
87 }
88 }
90 } // namespace Box3D
92 /*
93 Local Variables:
94 mode:c++
95 c-file-style:"stroustrup"
96 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
97 indent-tabs-mode:nil
98 fill-column:99
99 End:
100 */
101 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :