jitter.h
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上传日期:2007-05-28
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- /*
- * (c) Copyright 1993, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
- * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
- * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
- * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (c)(1)(ii) of the Rights in Technical Data and Computer Software
- * clause at DFARS 252.227-7013 and/or in similar or successor
- * clauses in the FAR or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
- /*
- jitter.h
- This file contains jitter point arrays for 2,3,4,8,15,24 and 66 jitters.
- The arrays are named j2, j3, etc. Each element in the array has the form,
- for example, j8[0].x and j8[0].y
- Values are floating point in the range -.5 < x < .5, -.5 < y < .5, and
- have a gaussian distribution around the origin.
- Use these to do model jittering for scene anti-aliasing and view volume
- jittering for depth of field effects. Use in conjunction with the
- accwindow() routine.
- */
- typedef struct
- {
- GLfloat x, y;
- } jitter_point;
- #define MAX_SAMPLES 66
- /* 2 jitter points */
- jitter_point j2[] =
- {
- { 0.246490, 0.249999},
- {-0.246490, -0.249999}
- };
- /* 3 jitter points */
- jitter_point j3[] =
- {
- {-0.373411, -0.250550},
- { 0.256263, 0.368119},
- { 0.117148, -0.117570}
- };
- /* 4 jitter points */
- jitter_point j4[] =
- {
- {-0.208147, 0.353730},
- { 0.203849, -0.353780},
- {-0.292626, -0.149945},
- { 0.296924, 0.149994}
- };
- /* 8 jitter points */
- jitter_point j8[] =
- {
- {-0.334818, 0.435331},
- { 0.286438, -0.393495},
- { 0.459462, 0.141540},
- {-0.414498, -0.192829},
- {-0.183790, 0.082102},
- {-0.079263, -0.317383},
- { 0.102254, 0.299133},
- { 0.164216, -0.054399}
- };
- /* 15 jitter points */
- jitter_point j15[] =
- {
- { 0.285561, 0.188437},
- { 0.360176, -0.065688},
- {-0.111751, 0.275019},
- {-0.055918, -0.215197},
- {-0.080231, -0.470965},
- { 0.138721, 0.409168},
- { 0.384120, 0.458500},
- {-0.454968, 0.134088},
- { 0.179271, -0.331196},
- {-0.307049, -0.364927},
- { 0.105354, -0.010099},
- {-0.154180, 0.021794},
- {-0.370135, -0.116425},
- { 0.451636, -0.300013},
- {-0.370610, 0.387504}
- };
- /* 24 jitter points */
- jitter_point j24[] =
- {
- { 0.030245, 0.136384},
- { 0.018865, -0.348867},
- {-0.350114, -0.472309},
- { 0.222181, 0.149524},
- {-0.393670, -0.266873},
- { 0.404568, 0.230436},
- { 0.098381, 0.465337},
- { 0.462671, 0.442116},
- { 0.400373, -0.212720},
- {-0.409988, 0.263345},
- {-0.115878, -0.001981},
- { 0.348425, -0.009237},
- {-0.464016, 0.066467},
- {-0.138674, -0.468006},
- { 0.144932, -0.022780},
- {-0.250195, 0.150161},
- {-0.181400, -0.264219},
- { 0.196097, -0.234139},
- {-0.311082, -0.078815},
- { 0.268379, 0.366778},
- {-0.040601, 0.327109},
- {-0.234392, 0.354659},
- {-0.003102, -0.154402},
- { 0.297997, -0.417965}
- };
- /* 66 jitter points */
- jitter_point j66[] =
- {
- { 0.266377, -0.218171},
- {-0.170919, -0.429368},
- { 0.047356, -0.387135},
- {-0.430063, 0.363413},
- {-0.221638, -0.313768},
- { 0.124758, -0.197109},
- {-0.400021, 0.482195},
- { 0.247882, 0.152010},
- {-0.286709, -0.470214},
- {-0.426790, 0.004977},
- {-0.361249, -0.104549},
- {-0.040643, 0.123453},
- {-0.189296, 0.438963},
- {-0.453521, -0.299889},
- { 0.408216, -0.457699},
- { 0.328973, -0.101914},
- {-0.055540, -0.477952},
- { 0.194421, 0.453510},
- { 0.404051, 0.224974},
- { 0.310136, 0.419700},
- {-0.021743, 0.403898},
- {-0.466210, 0.248839},
- { 0.341369, 0.081490},
- { 0.124156, -0.016859},
- {-0.461321, -0.176661},
- { 0.013210, 0.234401},
- { 0.174258, -0.311854},
- { 0.294061, 0.263364},
- {-0.114836, 0.328189},
- { 0.041206, -0.106205},
- { 0.079227, 0.345021},
- {-0.109319, -0.242380},
- { 0.425005, -0.332397},
- { 0.009146, 0.015098},
- {-0.339084, -0.355707},
- {-0.224596, -0.189548},
- { 0.083475, 0.117028},
- { 0.295962, -0.334699},
- { 0.452998, 0.025397},
- { 0.206511, -0.104668},
- { 0.447544, -0.096004},
- {-0.108006, -0.002471},
- {-0.380810, 0.130036},
- {-0.242440, 0.186934},
- {-0.200363, 0.070863},
- {-0.344844, -0.230814},
- { 0.408660, 0.345826},
- {-0.233016, 0.305203},
- { 0.158475, -0.430762},
- { 0.486972, 0.139163},
- {-0.301610, 0.009319},
- { 0.282245, -0.458671},
- { 0.482046, 0.443890},
- {-0.121527, 0.210223},
- {-0.477606, -0.424878},
- {-0.083941, -0.121440},
- {-0.345773, 0.253779},
- { 0.234646, 0.034549},
- { 0.394102, -0.210901},
- {-0.312571, 0.397656},
- { 0.200906, 0.333293},
- { 0.018703, -0.261792},
- {-0.209349, -0.065383},
- { 0.076248, 0.478538},
- {-0.073036, -0.355064},
- { 0.145087, 0.221726}
- };