1/*
2 * (c) Copyright 1993, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
11 *
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States.  Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
34 *
35 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
36 */
37/*
38jitter.h
39
40This file contains jitter point arrays for 2,3,4,8,15,24 and 66 jitters.
41
42The arrays are named j2, j3, etc. Each element in the array has the form,
43for example, j8[0].x and j8[0].y
44
45Values are floating point in the range -.5 < x < .5, -.5 < y < .5, and
46have a gaussian distribution around the origin.
47
48Use these to do model jittering for scene anti-aliasing and view volume
49jittering for depth of field effects. Use in conjunction with the
50accwindow() routine.
51*/
52
53typedef struct
54{
55	GLfloat x, y;
56} jitter_point;
57
58#define MAX_SAMPLES  66
59
60
61/* 2 jitter points */
62jitter_point j2[] =
63{
64	{ 0.246490,  0.249999},
65	{-0.246490, -0.249999}
66};
67
68
69/* 3 jitter points */
70jitter_point j3[] =
71{
72	{-0.373411, -0.250550},
73	{ 0.256263,  0.368119},
74	{ 0.117148, -0.117570}
75};
76
77
78/* 4 jitter points */
79jitter_point j4[] =
80{
81	{-0.208147,  0.353730},
82	{ 0.203849, -0.353780},
83	{-0.292626, -0.149945},
84	{ 0.296924,  0.149994}
85};
86
87
88/* 8 jitter points */
89jitter_point j8[] =
90{
91	{-0.334818,  0.435331},
92	{ 0.286438, -0.393495},
93	{ 0.459462,  0.141540},
94	{-0.414498, -0.192829},
95	{-0.183790,  0.082102},
96	{-0.079263, -0.317383},
97	{ 0.102254,  0.299133},
98	{ 0.164216, -0.054399}
99};
100
101
102/* 15 jitter points */
103jitter_point j15[] =
104{
105	{ 0.285561,  0.188437},
106	{ 0.360176, -0.065688},
107	{-0.111751,  0.275019},
108	{-0.055918, -0.215197},
109	{-0.080231, -0.470965},
110	{ 0.138721,  0.409168},
111	{ 0.384120,  0.458500},
112	{-0.454968,  0.134088},
113	{ 0.179271, -0.331196},
114	{-0.307049, -0.364927},
115	{ 0.105354, -0.010099},
116	{-0.154180,  0.021794},
117	{-0.370135, -0.116425},
118	{ 0.451636, -0.300013},
119	{-0.370610,  0.387504}
120};
121
122
123/* 24 jitter points */
124jitter_point j24[] =
125{
126	{ 0.030245,  0.136384},
127	{ 0.018865, -0.348867},
128	{-0.350114, -0.472309},
129	{ 0.222181,  0.149524},
130	{-0.393670, -0.266873},
131	{ 0.404568,  0.230436},
132	{ 0.098381,  0.465337},
133	{ 0.462671,  0.442116},
134	{ 0.400373, -0.212720},
135	{-0.409988,  0.263345},
136	{-0.115878, -0.001981},
137	{ 0.348425, -0.009237},
138	{-0.464016,  0.066467},
139	{-0.138674, -0.468006},
140	{ 0.144932, -0.022780},
141	{-0.250195,  0.150161},
142	{-0.181400, -0.264219},
143	{ 0.196097, -0.234139},
144	{-0.311082, -0.078815},
145	{ 0.268379,  0.366778},
146	{-0.040601,  0.327109},
147	{-0.234392,  0.354659},
148	{-0.003102, -0.154402},
149	{ 0.297997, -0.417965}
150};
151
152
153/* 66 jitter points */
154jitter_point j66[] =
155{
156	{ 0.266377, -0.218171},
157	{-0.170919, -0.429368},
158	{ 0.047356, -0.387135},
159	{-0.430063,  0.363413},
160	{-0.221638, -0.313768},
161	{ 0.124758, -0.197109},
162	{-0.400021,  0.482195},
163	{ 0.247882,  0.152010},
164	{-0.286709, -0.470214},
165	{-0.426790,  0.004977},
166	{-0.361249, -0.104549},
167	{-0.040643,  0.123453},
168	{-0.189296,  0.438963},
169	{-0.453521, -0.299889},
170	{ 0.408216, -0.457699},
171	{ 0.328973, -0.101914},
172	{-0.055540, -0.477952},
173	{ 0.194421,  0.453510},
174	{ 0.404051,  0.224974},
175	{ 0.310136,  0.419700},
176	{-0.021743,  0.403898},
177	{-0.466210,  0.248839},
178	{ 0.341369,  0.081490},
179	{ 0.124156, -0.016859},
180	{-0.461321, -0.176661},
181	{ 0.013210,  0.234401},
182	{ 0.174258, -0.311854},
183	{ 0.294061,  0.263364},
184	{-0.114836,  0.328189},
185	{ 0.041206, -0.106205},
186	{ 0.079227,  0.345021},
187	{-0.109319, -0.242380},
188	{ 0.425005, -0.332397},
189	{ 0.009146,  0.015098},
190	{-0.339084, -0.355707},
191	{-0.224596, -0.189548},
192	{ 0.083475,  0.117028},
193	{ 0.295962, -0.334699},
194	{ 0.452998,  0.025397},
195	{ 0.206511, -0.104668},
196	{ 0.447544, -0.096004},
197	{-0.108006, -0.002471},
198	{-0.380810,  0.130036},
199	{-0.242440,  0.186934},
200	{-0.200363,  0.070863},
201	{-0.344844, -0.230814},
202	{ 0.408660,  0.345826},
203	{-0.233016,  0.305203},
204	{ 0.158475, -0.430762},
205	{ 0.486972,  0.139163},
206	{-0.301610,  0.009319},
207	{ 0.282245, -0.458671},
208	{ 0.482046,  0.443890},
209	{-0.121527,  0.210223},
210	{-0.477606, -0.424878},
211	{-0.083941, -0.121440},
212	{-0.345773,  0.253779},
213	{ 0.234646,  0.034549},
214	{ 0.394102, -0.210901},
215	{-0.312571,  0.397656},
216	{ 0.200906,  0.333293},
217	{ 0.018703, -0.261792},
218	{-0.209349, -0.065383},
219	{ 0.076248,  0.478538},
220	{-0.073036, -0.355064},
221	{ 0.145087,  0.221726}
222};
223