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
222
|
//
// Filename : AdvancedStrokeShaders.h
// Author : Fredo Durand
// Purpose : Fredo's stroke shaders
// Date of creation : 17/12/2002
//
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) : Please refer to the COPYRIGHT file distributed
// with this source distribution.
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef ADVANCEDSTROKESHADERS_H
# define ADVANCEDSTROKESHADERS_H
# include "BasicStrokeShaders.h"
/*! [ Thickness Shader ].
* Assigns thicknesses to the stroke vertices
* so that the stroke looks like made with a calligraphic tool.
* i.e. The stroke will be the thickest in a main direction,
* the thinest in the direction perpendicular to this one,
* and an interpolation inbetween.
*/
class LIB_STROKE_EXPORT CalligraphicShader : public StrokeShader
{
public:
/*! Builds the shader.
* \param iMinThickness
* The minimum thickness in the direction perpandicular
* to the main direction.
* \param iMaxThickness
* The maximum thickness in the main direction.
* \param iOrientation
* The 2D vector giving the main direction.
* \param clamp
* Tells ???
*/
CalligraphicShader (real iMinThickness, real iMaxThickness,
const Vec2f &iOrientation, bool clamp);
/*! Destructor. */
virtual ~CalligraphicShader () {}
/*! The shading method */
virtual void shade(Stroke &ioStroke) const;
protected:
real _maxThickness;
real _minThickness;
Vec2f _orientation;
bool _clamp;
};
/*! [ Geometry Shader ].
* Spatial Noise stroke shader.
* Moves the vertices to make the stroke more noisy.
* @see \htmlonly <a href=noise/noise.html>noise/noise.html</a> \endhtmlonly
*/
class LIB_STROKE_EXPORT SpatialNoiseShader : public StrokeShader
{
public:
/*! Builds the shader.
* \param iAmount
* The amplitude of the noise.
* \param ixScale
* The noise frequency
* \param nbOctave
* The number of octaves
* \param smooth
* If you want the noise to be smooth
* \param pureRandom
* If you don't want any coherence
*/
SpatialNoiseShader (float iAmount, float ixScale, int nbOctave, bool smooth, bool pureRandom);
/*! Destructor. */
virtual ~SpatialNoiseShader () {}
/*! The shading method. */
virtual void shade(Stroke &ioStroke) const;
protected:
float _amount;
float _xScale;
int _nbOctave;
bool _smooth;
bool _pureRandom;
};
/*! [ Geometry Shader ].
* Smoothes the stroke.
* (Moves the vertices to make the stroke smoother).
* Uses curvature flow to converge towards a curve of constant
* curvature. The diffusion method we use is anisotropic
* to prevent the diffusion accross corners.
* @see \htmlonly <a href=/smoothing/smoothing.html>smoothing/smoothing.html</a> endhtmlonly
*/
class LIB_STROKE_EXPORT SmoothingShader : public StrokeShader
{
public:
/*! Builds the shader.
* \param iNbIteration
* The number of iterations. (400)
* \param iFactorPoint
* 0
* \param ifactorCurvature
* 0
* \param iFactorCurvatureDifference
* 0.2
* \param iAnisoPoint
* 0
* \param iAnisNormal
* 0
* \param iAnisoCurvature
* 0
* \param icarricatureFactor
* 1
*/
SmoothingShader (int iNbIteration, real iFactorPoint, real ifactorCurvature, real iFactorCurvatureDifference,
real iAnisoPoint, real iAnisoNormal, real iAnisoCurvature, real icarricatureFactor);
/*! Destructor. */
virtual ~SmoothingShader () {}
/*! The shading method. */
virtual void shade(Stroke &ioStroke) const;
protected:
int _nbIterations;
real _factorPoint;
real _factorCurvature;
real _factorCurvatureDifference;
real _anisoPoint;
real _anisoNormal;
real _anisoCurvature;
real _carricatureFactor;
};
class LIB_STROKE_EXPORT Smoother
{
public:
Smoother (Stroke &ioStroke);
virtual ~Smoother () {}
void smooth (int nbIterations, real iFactorPoint, real ifactorCurvature, real iFactorCurvatureDifference,
real iAnisoPoint, real iAnisoNormal, real iAnisoCurvature, real icarricatureFactor);
void computeCurvature ();
protected:
real _factorPoint;
real _factorCurvature;
real _factorCurvatureDifference;
real _anisoPoint;
real _anisoNormal;
real _anisoCurvature;
real _carricatureFactor;
void iteration();
void copyVertices ();
Stroke *_stroke;
int _nbVertices;
Vec2r *_vertex;
Vec2r *_normal;
real *_curvature;
bool *_isFixedVertex;
bool _isClosedCurve;
bool _safeTest;
};
class LIB_STROKE_EXPORT Omitter : public Smoother
{
public:
Omitter (Stroke &ioStroke);
virtual ~Omitter () {}
void omit (real sizeWindow, real thrVari, real thrFlat, real lFlat);
protected:
real *_u;
real _sizeWindow;
real _thresholdVariation;
real _thresholdFlat;
real _lengthFlat;
};
/*! Omission shader
*/
class LIB_STROKE_EXPORT OmissionShader : public StrokeShader
{
public:
OmissionShader (real sizeWindow, real thrVari, real thrFlat, real lFlat);
virtual ~OmissionShader () {}
virtual void shade(Stroke &ioStroke) const;
protected:
real _sizeWindow;
real _thresholdVariation;
real _thresholdFlat;
real _lengthFlat;
};
#endif // ADVANCEDSTROKESHADERS_H
|
