/* * (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 * Unpublished-- rights reserved under the copyright laws of the * United States.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} };