1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __FREESTYLE_NODE_CAMERA_H__
#define __FREESTYLE_NODE_CAMERA_H__
/** \file
* \ingroup freestyle
* \brief Class to represent a light node
*/
#include "Node.h"
#include "../geometry/Geom.h"
#include "../system/FreestyleConfig.h"
namespace Freestyle {
using namespace Geometry;
class NodeOrthographicCamera;
class NodePerspectiveCamera;
class NodeCamera : public Node {
public:
typedef enum {
PERSPECTIVE,
ORTHOGRAPHIC,
GENERIC,
} CameraType;
/*! Default matrices: Identity for both projection and modelview. */
NodeCamera(CameraType camera_type = GENERIC);
#if 0 /* UNUSED, gives warning in gcc */
NodeCamera(const NodeCamera &iBrother);
#endif
virtual ~NodeCamera()
{
}
/*! Accept the corresponding visitor */
virtual void accept(SceneVisitor &v);
/*! Matrix is copied */
void setModelViewMatrix(double modelview_matrix[16]);
/*! Matrix is copied */
void setProjectionMatrix(double projection_matrix[16]);
double *modelViewMatrix()
{
return modelview_matrix_;
}
double *projectionMatrix()
{
return projection_matrix_;
}
protected:
// row major right handed matrix
double modelview_matrix_[16];
// row major right handed matrix
double projection_matrix_[16];
CameraType camera_type_;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:NodeCamera")
#endif
};
class NodeOrthographicCamera : public NodeCamera {
public:
NodeOrthographicCamera();
/*! Builds a parallel projection matrix a la glOrtho.
* A 0 0 tx
* 0 B 0 ty
* 0 0 C tz
* 0 0 0 1
*
* where
* A = 2 / (right - left)
* B = 2 / (top - bottom)
* C = -2 / (far - near)
* tx = -(right + left) / (right - left)
* ty = -(top + bottom) / (top - bottom)
* tz = -(zFar + zNear) / (zFar - zNear)
*/
NodeOrthographicCamera(
double left, double right, double bottom, double top, double zNear, double zFar);
double left() const
{
return left_;
}
double right() const
{
return right_;
}
double bottom() const
{
return bottom_;
}
double top() const
{
return top_;
}
double zNear() const
{
return zNear_;
}
double zFar() const
{
return zFar_;
}
NodeOrthographicCamera(const NodeOrthographicCamera &iBrother);
private:
double left_;
double right_;
double bottom_;
double top_;
double zNear_;
double zFar_;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:NodeOrthographicCamera")
#endif
};
class NodePerspectiveCamera : public NodeCamera {
public:
NodePerspectiveCamera();
/*! Builds a perspective projection matrix a la gluPerspective.
* Given f defined as follows:
* fovy
* f = cotangent(____)
* 2
* The generated matrix is
* ( f )
* | ______ 0 0 0 |
* | aspect |
* | |
* | 0 f 0 0 |
* | |
* | zNear+zFar 2*zNear*zFar |
* | 0 0 __________ ____________ |
* | zNear-zFar zNear-zFar |
* | |
* ( 0 0 -1 0 )
* \param fovy:
* Field of View specified in radians.
*/
NodePerspectiveCamera(double fovy, double aspect, double zNear, double zFar);
/*! Builds a perspective projection matrix a la glFrustum.
* ( 2*zNear )
* | __________ 0 A 0 |
* | right-left |
* | |
* | 2*zNear |
* | 0 __________ B 0 |
* | top-bottom |
* | |
* | 0 0 C D |
* | |
* | 0 0 -1 0 |
* ( )
*
* right+left
* A = __________
* right-left
*
* top+bottom
* B = __________
* top-bottom
*
* zFar+zNear
* C = - __________
* zFar-zNear
*
* 2*zFar*zNear
* D = - ____________
* zFar-zNear
*/
NodePerspectiveCamera(
double left, double right, double bottom, double top, double zNear, double zFar);
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:NodePerspectiveCamera")
#endif
};
} /* namespace Freestyle */
#endif // __FREESTYLE_NODE_CAMERA_H__
|
