223 lines
5.8 KiB
C
223 lines
5.8 KiB
C
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/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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*/
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/*
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jitter.h
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This file contains jitter point arrays for 2,3,4,8,15,24 and 66 jitters.
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The arrays are named j2, j3, etc. Each element in the array has the form,
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for example, j8[0].x and j8[0].y
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Values are floating point in the range -.5 < x < .5, -.5 < y < .5, and
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have a gaussian distribution around the origin.
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Use these to do model jittering for scene anti-aliasing and view volume
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jittering for depth of field effects. Use in conjunction with the
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accwindow() routine.
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*/
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typedef struct
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{
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GLfloat x, y;
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} jitter_point;
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#define MAX_SAMPLES 66
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/* 2 jitter points */
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jitter_point j2[] =
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{
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{ 0.246490, 0.249999},
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{-0.246490, -0.249999}
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};
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/* 3 jitter points */
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jitter_point j3[] =
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{
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{-0.373411, -0.250550},
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{ 0.256263, 0.368119},
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{ 0.117148, -0.117570}
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};
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/* 4 jitter points */
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jitter_point j4[] =
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{
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{-0.208147, 0.353730},
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{ 0.203849, -0.353780},
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{-0.292626, -0.149945},
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{ 0.296924, 0.149994}
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};
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/* 8 jitter points */
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jitter_point j8[] =
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{
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{-0.334818, 0.435331},
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{ 0.286438, -0.393495},
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{ 0.459462, 0.141540},
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{-0.414498, -0.192829},
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{-0.183790, 0.082102},
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{-0.079263, -0.317383},
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{ 0.102254, 0.299133},
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{ 0.164216, -0.054399}
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};
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/* 15 jitter points */
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jitter_point j15[] =
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{
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{ 0.285561, 0.188437},
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{ 0.360176, -0.065688},
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{-0.111751, 0.275019},
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{-0.055918, -0.215197},
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{-0.080231, -0.470965},
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{ 0.138721, 0.409168},
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{ 0.384120, 0.458500},
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{-0.454968, 0.134088},
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{ 0.179271, -0.331196},
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{-0.307049, -0.364927},
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{ 0.105354, -0.010099},
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{-0.154180, 0.021794},
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{-0.370135, -0.116425},
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{ 0.451636, -0.300013},
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{-0.370610, 0.387504}
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};
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/* 24 jitter points */
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jitter_point j24[] =
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{
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{ 0.030245, 0.136384},
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{ 0.018865, -0.348867},
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{-0.350114, -0.472309},
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{ 0.222181, 0.149524},
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{-0.393670, -0.266873},
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{ 0.404568, 0.230436},
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{ 0.098381, 0.465337},
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{ 0.462671, 0.442116},
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{ 0.400373, -0.212720},
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{-0.409988, 0.263345},
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{-0.115878, -0.001981},
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{ 0.348425, -0.009237},
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{-0.464016, 0.066467},
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{-0.138674, -0.468006},
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{ 0.144932, -0.022780},
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{-0.250195, 0.150161},
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{-0.181400, -0.264219},
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{ 0.196097, -0.234139},
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{-0.311082, -0.078815},
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{ 0.268379, 0.366778},
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{-0.040601, 0.327109},
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{-0.234392, 0.354659},
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{-0.003102, -0.154402},
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{ 0.297997, -0.417965}
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};
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/* 66 jitter points */
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jitter_point j66[] =
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{
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{ 0.266377, -0.218171},
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{-0.170919, -0.429368},
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{ 0.047356, -0.387135},
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{-0.430063, 0.363413},
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{-0.221638, -0.313768},
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{ 0.124758, -0.197109},
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{-0.400021, 0.482195},
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{ 0.247882, 0.152010},
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{-0.286709, -0.470214},
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{-0.426790, 0.004977},
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{-0.361249, -0.104549},
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{-0.040643, 0.123453},
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{-0.189296, 0.438963},
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{-0.453521, -0.299889},
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{ 0.408216, -0.457699},
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{ 0.328973, -0.101914},
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{-0.055540, -0.477952},
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{ 0.194421, 0.453510},
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{ 0.404051, 0.224974},
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{ 0.310136, 0.419700},
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{-0.021743, 0.403898},
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{-0.466210, 0.248839},
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{ 0.341369, 0.081490},
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{ 0.124156, -0.016859},
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{-0.461321, -0.176661},
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{ 0.013210, 0.234401},
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{ 0.174258, -0.311854},
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{ 0.294061, 0.263364},
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{-0.114836, 0.328189},
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{ 0.041206, -0.106205},
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{ 0.079227, 0.345021},
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{-0.109319, -0.242380},
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{ 0.425005, -0.332397},
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{ 0.009146, 0.015098},
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{-0.339084, -0.355707},
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{-0.224596, -0.189548},
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{ 0.083475, 0.117028},
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{ 0.295962, -0.334699},
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{ 0.452998, 0.025397},
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{ 0.206511, -0.104668},
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{ 0.447544, -0.096004},
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{-0.108006, -0.002471},
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{-0.380810, 0.130036},
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{-0.242440, 0.186934},
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{-0.200363, 0.070863},
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{-0.344844, -0.230814},
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{ 0.408660, 0.345826},
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{-0.233016, 0.305203},
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{ 0.158475, -0.430762},
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{ 0.486972, 0.139163},
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{-0.301610, 0.009319},
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{ 0.282245, -0.458671},
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{ 0.482046, 0.443890},
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{-0.121527, 0.210223},
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{-0.477606, -0.424878},
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{-0.083941, -0.121440},
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{-0.345773, 0.253779},
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{ 0.234646, 0.034549},
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{ 0.394102, -0.210901},
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{-0.312571, 0.397656},
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{ 0.200906, 0.333293},
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{ 0.018703, -0.261792},
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{-0.209349, -0.065383},
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{ 0.076248, 0.478538},
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{-0.073036, -0.355064},
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{ 0.145087, 0.221726}
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};
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