jitter.h   [plain text]

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 * Unpublished-- rights reserved under the copyright laws of the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