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
|
/* Libvisual-plugins - Standard plugins for libvisual
*
* Copyright (C) 2000, 2001 Remi Arquier <arquier@crans.org>
*
* Authors: Remi Arquier <arquier@crans.org>
* Dennis Smit <ds@nerds-incorporated.org>
*
* $Id: distorsion.c,v 1.5 2005/12/20 18:49:12 synap Exp $
*
* 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
*/
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "distorsion.h"
#include "def.h"
#include "jess.h"
void create_tables(JessPrivate *priv)
{
int i, j, k, x, y;
float n_fx, n_fy;
int resy, resx;
resy = priv->resy;
resx = priv->resx;
for (k=1; k<5; k++)
{
for (i = 0; i < priv->resy; i++)
{
for (j = 0; j < priv->resx; j++)
{
n_fx = (float) j - priv->xres2;
n_fy = (float) i - priv->yres2;
switch(k)
{
case 1:
rot_hyperbolic_radial (&n_fx, &n_fy, -PI / 5, 0.001, 0,
RESFACTY (50)) ;
rot_hyperbolic_radial (&n_fx, &n_fy, PI / 2, 0.004,
RESFACTX (200), RESFACTY (-30)) ;
rot_hyperbolic_radial (&n_fx, &n_fy, PI / 5, 0.001,
RESFACTX (-150), RESFACTY (-30)) ;
rot_hyperbolic_radial (&n_fx, &n_fy, PI / 30, 0.0001, 0, 0) ;
break;
case 2:
rot_cos_radial(&n_fx,&n_fy, 2*PI/75, 0.01,000,000) ;
break;
case 3:
homothetie_hyperbolic(&n_fx, &n_fy, 0.0005,0,0) ;
break;
case 4:
noize(priv, &n_fx, &n_fy, 0*5.0);
/* rot_hyperbolic_radial (&n_fx, &n_fy, PI / 30, 0.00010, 0, 0) ; */
/* homothetie_hyperbolic(&n_fx, &n_fy, -0.0002,0,0) ; */
/* homothetie_cos_radial(&n_fx, &n_fy, 0.01,-10,10) ; */
break;
}
x = (int) (n_fx + priv->xres2);
y = (int) (n_fy + priv->yres2);
if (x < 0 || x >= priv->resx || y < 0 || y >= priv->resy )
{
x = 0;
y = 0;
}
switch(k)
{
case 1:
priv->table1[i * resx + j] = x + y * resx;
break;
case 2:
priv->table2[i * resx + j] = x + y * resx;
break;
case 3:
priv->table3[i * resx + j] = x + y * resx;
break;
case 4:
priv->table4[i * resx + j] = x + y * resx;
break;
}
}
}
}
}
void rot_hyperbolic_radial(float *n_fx,float *n_fy,float d_alpha, float rad_factor, float cx, float cy)
{
float r2,dx = *n_fx-cx, dy = *n_fy-cy,cosal, sinal;
r2 = (dx)*(dx)+(dy)*(dy);
d_alpha*=1/(1+r2*rad_factor);
cosal = cos(d_alpha) ;
sinal = sin(d_alpha) ;
*n_fx = cx + dx * cosal - dy * sinal;
*n_fy = cy + dx * sinal + dy * cosal;
}
void rot_cos_radial( float *n_fx,float *n_fy,float d_alpha, float rad_factor, float cx, float cy)
{
float r,dx = *n_fx-cx, dy = *n_fy-cy,cosal, sinal;
r = sqrt(dx*dx+dy*dy);
d_alpha=d_alpha*cos(r*rad_factor);
cosal = cos(d_alpha) ;
sinal = sin(d_alpha) ;
*n_fx = cx + dx * cosal - dy * sinal;
*n_fy = cy + dx * sinal + dy * cosal;
}
void homothetie_hyperbolic(float *n_fx,float *n_fy, float rad_factor, float cx, float cy)
{
float r,dx = *n_fx-cx, dy = *n_fy-cy;
r = sqrt(dx*dx+dy*dy);
*n_fx = cx + dx/(1+rad_factor*r);
*n_fy = cy + dy/(1+rad_factor*r);
}
void homothetie_cos_radial(float *n_fx,float *n_fy, float rad_factor, float cx, float cy)
{
float r,cosrad, dx = *n_fx-cx, dy = *n_fy-cy;
r = sqrt(dx*dx+dy*dy);
cosrad = cos(r*rad_factor);
*n_fx = cx + dx*cosrad;
*n_fy = cy + dy*cosrad;
}
void noize(JessPrivate *priv, float *n_fx,float *n_fy, float intensity)
{
*n_fx +=2*((float)visual_random_context_int(priv->rcontext)/VISUAL_RANDOM_MAX-0.5)*intensity;
*n_fy +=2*((float)visual_random_context_int(priv->rcontext)/VISUAL_RANDOM_MAX-0.5)*intensity-5;
}
|
