| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.24 |
static const char RCSid[] = "$Id: raycalls.c,v 2.23 2018/01/23 23:37:11 greg Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
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/* |
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* raycalls.c - interface for running Radiance rendering as a library |
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* |
| 7 |
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* External symbols declared in ray.h |
| 8 |
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*/ |
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| 10 |
greg |
2.2 |
#include "copyright.h" |
| 11 |
greg |
2.1 |
|
| 12 |
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/* |
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* These routines are designed to aid the programmer who wishes |
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* to call Radiance as a library. Unfortunately, the system was |
| 15 |
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* not originally intended to be run this way, and there are some |
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* awkward limitations to contend with. The most irritating |
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* perhaps is that the global variables and functions do not have |
| 18 |
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* a prefix, and the symbols are a bit generic. This results in a |
| 19 |
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* serious invasion of the calling application's name-space, and |
| 20 |
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* you may need to rename either some Radiance routines or some |
| 21 |
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* of your routines to avoid conflicts. Another limitation is |
| 22 |
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* that the global variables are not gathered together into any |
| 23 |
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* sort of context, so it is impossible to simultaneously run |
| 24 |
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* this library on multiple scenes or in multiple threads. |
| 25 |
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* You get one scene and one thread, and if you want more, you |
| 26 |
greg |
2.10 |
* will have to go with the process model defined in raypcalls.c. |
| 27 |
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* Finally, unrecoverable errors result in a call to the application- |
| 28 |
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* defined function quit(). The usual thing to do is to call exit(). |
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greg |
2.1 |
* You might want to do something else instead, like |
| 30 |
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* call setjmp()/longjmp() to bring you back to the calling |
| 31 |
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* function for recovery. You may also wish to define your own |
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* wputs(s) and eputs(s) functions to output warning and error |
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* messages, respectively. |
| 34 |
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* |
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* With those caveats, we have attempted to make the interface |
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* as simple as we can. Global variables and their defaults |
| 37 |
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* are defined below, and including "ray.h" declares these |
| 38 |
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* along with all the routines you are likely to need. First, |
| 39 |
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* assign the global variable progname to your argv[0], then |
| 40 |
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* change the rendering parameters as you like. If you have a set |
| 41 |
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* of option arguments you are working from, the getrenderopt(ac,av) |
| 42 |
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* call should be very useful. Before tracing any rays, you |
| 43 |
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* must read in the octree with a call to ray_init(oct). |
| 44 |
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* Passing NULL for the file name causes ray_init() to read |
| 45 |
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* the octree from the standard input -- rarely a good idea. |
| 46 |
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* However, one may read an octree from a program (such as |
| 47 |
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* oconv) by preceding a shell command by a '!' character. |
| 48 |
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* |
| 49 |
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* To trace a ray, define a RAY object myRay and assign: |
| 50 |
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* |
| 51 |
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* myRay.rorg = ( ray origin point ) |
| 52 |
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* myRay.rdir = ( normalized ray direction ) |
| 53 |
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* myRay.rmax = ( maximum length, or zero for no limit ) |
| 54 |
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* |
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* If you are rendering from a VIEW structure, this can be |
| 56 |
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* accomplished with a single call for the ray at (x,y): |
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* |
| 58 |
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* myRay.rmax = viewray(myRay.rorg, myRay.rdir, &myView, x, y); |
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* |
| 60 |
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* Then, trace the primary ray with: |
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* |
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* ray_trace(&myRay); |
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* |
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* The resulting contents of myRay should provide you with |
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* more than enough information about what the ray hit, |
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* the computed value, etc. For further clues of how to |
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* compute irradiance, how to get callbacks on the evaluated |
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* ray tree, etc., see the contents of rtrace.c. See |
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* also the rpmain.c, rtmain.c, and rvmain.c modules |
| 70 |
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* to learn more how rendering options are processed. |
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* |
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* When you are done, you may call ray_done(1) to clean |
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* up memory used by Radiance. It doesn't free everything, |
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* but it makes a valiant effort. If you call ray_done(0), |
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* it leaves data that is likely to be reused, including |
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* loaded data files and fonts. The library may be |
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* restarted at any point by calling ray_init() on a new |
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* octree. |
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* |
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greg |
2.3 |
* The call ray_save(rp) fills a parameter structure |
| 81 |
greg |
2.1 |
* with the current global parameter settings, which may be |
| 82 |
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* restored at any time with a call to ray_restore(rp). |
| 83 |
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* This buffer contains no linked information, and thus |
| 84 |
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* may be passed between processes using write() and |
| 85 |
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* read() calls, so long as byte order is maintained. |
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* Calling ray_restore(NULL) restores the original |
| 87 |
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* default parameters, which is also retrievable with |
| 88 |
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* the call ray_defaults(rp). (These should be the |
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* same as the defaults for rtrace.) |
| 90 |
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*/ |
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schorsch |
2.4 |
#include <string.h> |
| 93 |
greg |
2.14 |
#include <time.h> |
| 94 |
schorsch |
2.4 |
|
| 95 |
greg |
2.1 |
#include "ray.h" |
| 96 |
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#include "source.h" |
| 97 |
greg |
2.19 |
#include "bsdf.h" |
| 98 |
greg |
2.1 |
#include "ambient.h" |
| 99 |
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#include "otypes.h" |
| 100 |
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#include "random.h" |
| 101 |
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#include "data.h" |
| 102 |
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#include "font.h" |
| 103 |
greg |
2.21 |
#include "pmapray.h" |
| 104 |
greg |
2.1 |
|
| 105 |
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char *progname = "unknown_app"; /* caller sets to argv[0] */ |
| 106 |
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| 107 |
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char *octname; /* octree name we are given */ |
| 108 |
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| 109 |
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char *shm_boundary = NULL; /* boundary of shared memory */ |
| 110 |
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| 111 |
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CUBE thescene; /* our scene */ |
| 112 |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
| 113 |
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| 114 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
| 115 |
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int ndims = 0; /* number of sampling dimensions */ |
| 116 |
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int samplendx = 0; /* index for this sample */ |
| 117 |
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| 118 |
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void (*trace)() = NULL; /* trace call */ |
| 119 |
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greg |
2.6 |
void (*addobjnotify[8])() = {ambnotify, NULL}; |
| 121 |
greg |
2.1 |
|
| 122 |
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int do_irrad = 0; /* compute irradiance? */ |
| 123 |
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| 124 |
greg |
2.24 |
int rand_samp = 1; /* pure Monte Carlo sampling? */ |
| 125 |
greg |
2.13 |
|
| 126 |
greg |
2.1 |
double dstrsrc = 0.0; /* square source distribution */ |
| 127 |
greg |
2.8 |
double shadthresh = .03; /* shadow threshold */ |
| 128 |
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double shadcert = .75; /* shadow certainty */ |
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greg |
2.1 |
int directrelay = 2; /* number of source relays */ |
| 130 |
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int vspretest = 512; /* virtual source pretest density */ |
| 131 |
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int directvis = 1; /* sources visible? */ |
| 132 |
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double srcsizerat = .2; /* maximum ratio source size/dist. */ |
| 133 |
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| 134 |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
| 135 |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
| 136 |
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double seccg = 0.; /* global scattering eccentricity */ |
| 137 |
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double ssampdist = 0.; /* scatter sampling distance */ |
| 138 |
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| 139 |
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double specthresh = .15; /* specular sampling threshold */ |
| 140 |
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double specjitter = 1.; /* specular sampling jitter */ |
| 141 |
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| 142 |
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int backvis = 1; /* back face visibility */ |
| 143 |
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| 144 |
greg |
2.24 |
int maxdepth = -10; /* maximum recursion depth */ |
| 145 |
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double minweight = 2e-3; /* minimum ray weight */ |
| 146 |
greg |
2.1 |
|
| 147 |
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char *ambfile = NULL; /* ambient file name */ |
| 148 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
| 149 |
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int ambvwt = 0; /* initial weight for ambient value */ |
| 150 |
greg |
2.8 |
double ambacc = 0.1; /* ambient accuracy */ |
| 151 |
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int ambres = 256; /* ambient resolution */ |
| 152 |
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int ambdiv = 1024; /* ambient divisions */ |
| 153 |
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int ambssamp = 512; /* ambient super-samples */ |
| 154 |
greg |
2.1 |
int ambounce = 0; /* ambient bounces */ |
| 155 |
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char *amblist[AMBLLEN+1]; /* ambient include/exclude list */ |
| 156 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
| 157 |
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| 158 |
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| 159 |
greg |
2.17 |
void |
| 160 |
schorsch |
2.9 |
ray_init( /* initialize ray-tracing calculation */ |
| 161 |
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char *otnm |
| 162 |
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) |
| 163 |
greg |
2.1 |
{ |
| 164 |
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if (nobjects > 0) /* free old scene data */ |
| 165 |
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ray_done(0); |
| 166 |
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/* initialize object types */ |
| 167 |
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if (ofun[OBJ_SPHERE].funp == o_default) |
| 168 |
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initotypes(); |
| 169 |
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/* initialize urand */ |
| 170 |
greg |
2.16 |
if (rand_samp) { |
| 171 |
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srandom((long)time(0)); |
| 172 |
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initurand(0); |
| 173 |
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} else { |
| 174 |
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srandom(0L); |
| 175 |
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initurand(2048); |
| 176 |
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} |
| 177 |
greg |
2.1 |
/* read scene octree */ |
| 178 |
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readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
| 179 |
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nsceneobjs = nobjects; |
| 180 |
greg |
2.21 |
/* PMAP: Init & load photon maps */ |
| 181 |
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ray_init_pmap(); |
| 182 |
greg |
2.1 |
/* find and mark sources */ |
| 183 |
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marksources(); |
| 184 |
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/* initialize ambient calculation */ |
| 185 |
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setambient(); |
| 186 |
greg |
2.21 |
/* ready to go... (almost) */ |
| 187 |
greg |
2.1 |
} |
| 188 |
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| 189 |
greg |
2.17 |
void |
| 190 |
schorsch |
2.9 |
ray_trace( /* trace a primary ray */ |
| 191 |
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RAY *r |
| 192 |
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) |
| 193 |
greg |
2.1 |
{ |
| 194 |
greg |
2.11 |
rayorigin(r, PRIMARY, NULL, NULL); |
| 195 |
greg |
2.16 |
samplendx++; |
| 196 |
greg |
2.1 |
rayvalue(r); /* assumes origin and direction are set */ |
| 197 |
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} |
| 198 |
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| 199 |
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| 200 |
greg |
2.17 |
void |
| 201 |
schorsch |
2.9 |
ray_done( /* free ray-tracing data */ |
| 202 |
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int freall |
| 203 |
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) |
| 204 |
greg |
2.1 |
{ |
| 205 |
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retainfonts = 1; |
| 206 |
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ambdone(); |
| 207 |
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ambnotify(OVOID); |
| 208 |
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freesources(); |
| 209 |
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freeobjects(0, nobjects); |
| 210 |
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donesets(); |
| 211 |
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octdone(); |
| 212 |
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thescene.cutree = EMPTY; |
| 213 |
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octname = NULL; |
| 214 |
greg |
2.19 |
retainfonts = 0; |
| 215 |
greg |
2.1 |
if (freall) { |
| 216 |
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freefont(NULL); |
| 217 |
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freedata(NULL); |
| 218 |
greg |
2.19 |
SDfreeCache(NULL); |
| 219 |
greg |
2.1 |
initurand(0); |
| 220 |
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} |
| 221 |
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if (nobjects > 0) { |
| 222 |
schorsch |
2.9 |
sprintf(errmsg, "%ld objects left after call to ray_done()", |
| 223 |
greg |
2.18 |
(long)nobjects); |
| 224 |
greg |
2.1 |
error(WARNING, errmsg); |
| 225 |
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} |
| 226 |
greg |
2.21 |
|
| 227 |
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ray_done_pmap(); |
| 228 |
greg |
2.1 |
} |
| 229 |
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| 230 |
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| 231 |
greg |
2.17 |
void |
| 232 |
schorsch |
2.9 |
ray_save( /* save current parameter settings */ |
| 233 |
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RAYPARAMS *rp |
| 234 |
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) |
| 235 |
greg |
2.1 |
{ |
| 236 |
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int i, ndx; |
| 237 |
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| 238 |
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if (rp == NULL) |
| 239 |
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return; |
| 240 |
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rp->do_irrad = do_irrad; |
| 241 |
greg |
2.24 |
rp->rand_samp = rand_samp; |
| 242 |
greg |
2.1 |
rp->dstrsrc = dstrsrc; |
| 243 |
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rp->shadthresh = shadthresh; |
| 244 |
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rp->shadcert = shadcert; |
| 245 |
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rp->directrelay = directrelay; |
| 246 |
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rp->vspretest = vspretest; |
| 247 |
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rp->directvis = directvis; |
| 248 |
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rp->srcsizerat = srcsizerat; |
| 249 |
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copycolor(rp->cextinction, cextinction); |
| 250 |
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copycolor(rp->salbedo, salbedo); |
| 251 |
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rp->seccg = seccg; |
| 252 |
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rp->ssampdist = ssampdist; |
| 253 |
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rp->specthresh = specthresh; |
| 254 |
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rp->specjitter = specjitter; |
| 255 |
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rp->backvis = backvis; |
| 256 |
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rp->maxdepth = maxdepth; |
| 257 |
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rp->minweight = minweight; |
| 258 |
|
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if (ambfile != NULL) |
| 259 |
|
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strncpy(rp->ambfile, ambfile, sizeof(rp->ambfile)-1); |
| 260 |
greg |
2.24 |
else |
| 261 |
|
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memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 262 |
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copycolor(rp->ambval, ambval); |
| 263 |
greg |
2.1 |
rp->ambvwt = ambvwt; |
| 264 |
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rp->ambacc = ambacc; |
| 265 |
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rp->ambres = ambres; |
| 266 |
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rp->ambdiv = ambdiv; |
| 267 |
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rp->ambssamp = ambssamp; |
| 268 |
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rp->ambounce = ambounce; |
| 269 |
|
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rp->ambincl = ambincl; |
| 270 |
schorsch |
2.4 |
memset(rp->amblval, '\0', sizeof(rp->amblval)); |
| 271 |
greg |
2.1 |
ndx = 0; |
| 272 |
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for (i = 0; i < AMBLLEN && amblist[i] != NULL; i++) { |
| 273 |
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int len = strlen(amblist[i]); |
| 274 |
|
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if (ndx+len >= sizeof(rp->amblval)) |
| 275 |
|
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break; |
| 276 |
|
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strcpy(rp->amblval+ndx, amblist[i]); |
| 277 |
greg |
2.23 |
rp->amblndx[i] = ndx; |
| 278 |
greg |
2.1 |
ndx += len+1; |
| 279 |
|
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} |
| 280 |
|
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while (i <= AMBLLEN) |
| 281 |
|
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rp->amblndx[i++] = -1; |
| 282 |
greg |
2.21 |
|
| 283 |
|
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/* PMAP: save photon mapping params */ |
| 284 |
|
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ray_save_pmap(rp); |
| 285 |
greg |
2.1 |
} |
| 286 |
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|
| 287 |
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|
| 288 |
greg |
2.17 |
void |
| 289 |
schorsch |
2.9 |
ray_restore( /* restore parameter settings */ |
| 290 |
|
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RAYPARAMS *rp |
| 291 |
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) |
| 292 |
greg |
2.1 |
{ |
| 293 |
|
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register int i; |
| 294 |
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|
| 295 |
|
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if (rp == NULL) { /* restore defaults */ |
| 296 |
|
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RAYPARAMS dflt; |
| 297 |
|
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ray_defaults(&dflt); |
| 298 |
|
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ray_restore(&dflt); |
| 299 |
|
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return; |
| 300 |
|
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} |
| 301 |
|
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/* restore saved settings */ |
| 302 |
|
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do_irrad = rp->do_irrad; |
| 303 |
greg |
2.24 |
rand_samp = rp->rand_samp; |
| 304 |
greg |
2.1 |
dstrsrc = rp->dstrsrc; |
| 305 |
|
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shadthresh = rp->shadthresh; |
| 306 |
|
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shadcert = rp->shadcert; |
| 307 |
|
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directrelay = rp->directrelay; |
| 308 |
|
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vspretest = rp->vspretest; |
| 309 |
|
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directvis = rp->directvis; |
| 310 |
|
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srcsizerat = rp->srcsizerat; |
| 311 |
|
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copycolor(cextinction, rp->cextinction); |
| 312 |
|
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copycolor(salbedo, rp->salbedo); |
| 313 |
|
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seccg = rp->seccg; |
| 314 |
|
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ssampdist = rp->ssampdist; |
| 315 |
|
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specthresh = rp->specthresh; |
| 316 |
|
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specjitter = rp->specjitter; |
| 317 |
|
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backvis = rp->backvis; |
| 318 |
|
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maxdepth = rp->maxdepth; |
| 319 |
|
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minweight = rp->minweight; |
| 320 |
|
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copycolor(ambval, rp->ambval); |
| 321 |
|
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ambvwt = rp->ambvwt; |
| 322 |
|
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ambdiv = rp->ambdiv; |
| 323 |
|
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ambssamp = rp->ambssamp; |
| 324 |
|
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ambounce = rp->ambounce; |
| 325 |
|
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for (i = 0; rp->amblndx[i] >= 0; i++) |
| 326 |
|
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amblist[i] = rp->amblval + rp->amblndx[i]; |
| 327 |
|
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while (i <= AMBLLEN) |
| 328 |
|
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amblist[i++] = NULL; |
| 329 |
|
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ambincl = rp->ambincl; |
| 330 |
|
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/* update ambient calculation */ |
| 331 |
|
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ambnotify(OVOID); |
| 332 |
|
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if (thescene.cutree != EMPTY) { |
| 333 |
|
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int newamb = (ambfile == NULL) ? rp->ambfile[0] : |
| 334 |
|
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strcmp(ambfile, rp->ambfile) ; |
| 335 |
|
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|
| 336 |
|
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if (amblist[0] != NULL) |
| 337 |
|
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for (i = 0; i < nobjects; i++) |
| 338 |
|
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ambnotify(i); |
| 339 |
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|
| 340 |
|
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ambfile = (rp->ambfile[0]) ? rp->ambfile : (char *)NULL; |
| 341 |
|
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if (newamb) { |
| 342 |
|
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ambres = rp->ambres; |
| 343 |
|
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ambacc = rp->ambacc; |
| 344 |
|
|
setambient(); |
| 345 |
|
|
} else { |
| 346 |
|
|
setambres(rp->ambres); |
| 347 |
|
|
setambacc(rp->ambacc); |
| 348 |
|
|
} |
| 349 |
|
|
} else { |
| 350 |
|
|
ambfile = (rp->ambfile[0]) ? rp->ambfile : (char *)NULL; |
| 351 |
|
|
ambres = rp->ambres; |
| 352 |
|
|
ambacc = rp->ambacc; |
| 353 |
|
|
} |
| 354 |
greg |
2.21 |
|
| 355 |
|
|
/* PMAP: restore photon mapping params */ |
| 356 |
|
|
ray_restore_pmap(rp); |
| 357 |
greg |
2.1 |
} |
| 358 |
|
|
|
| 359 |
|
|
|
| 360 |
greg |
2.17 |
void |
| 361 |
schorsch |
2.9 |
ray_defaults( /* get default parameter values */ |
| 362 |
|
|
RAYPARAMS *rp |
| 363 |
|
|
) |
| 364 |
greg |
2.1 |
{ |
| 365 |
|
|
int i; |
| 366 |
|
|
|
| 367 |
|
|
if (rp == NULL) |
| 368 |
|
|
return; |
| 369 |
|
|
|
| 370 |
|
|
rp->do_irrad = 0; |
| 371 |
greg |
2.24 |
rp->rand_samp = 1; |
| 372 |
greg |
2.1 |
rp->dstrsrc = 0.0; |
| 373 |
greg |
2.8 |
rp->shadthresh = .03; |
| 374 |
|
|
rp->shadcert = .75; |
| 375 |
greg |
2.1 |
rp->directrelay = 2; |
| 376 |
|
|
rp->vspretest = 512; |
| 377 |
|
|
rp->directvis = 1; |
| 378 |
|
|
rp->srcsizerat = .2; |
| 379 |
|
|
setcolor(rp->cextinction, 0., 0., 0.); |
| 380 |
|
|
setcolor(rp->salbedo, 0., 0., 0.); |
| 381 |
|
|
rp->seccg = 0.; |
| 382 |
|
|
rp->ssampdist = 0.; |
| 383 |
|
|
rp->specthresh = .15; |
| 384 |
|
|
rp->specjitter = 1.; |
| 385 |
|
|
rp->backvis = 1; |
| 386 |
greg |
2.24 |
rp->maxdepth = -10; |
| 387 |
greg |
2.7 |
rp->minweight = 2e-3; |
| 388 |
greg |
2.24 |
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 389 |
greg |
2.1 |
setcolor(rp->ambval, 0., 0., 0.); |
| 390 |
|
|
rp->ambvwt = 0; |
| 391 |
greg |
2.7 |
rp->ambres = 256; |
| 392 |
greg |
2.10 |
rp->ambacc = 0.15; |
| 393 |
greg |
2.7 |
rp->ambdiv = 1024; |
| 394 |
|
|
rp->ambssamp = 512; |
| 395 |
greg |
2.1 |
rp->ambounce = 0; |
| 396 |
|
|
rp->ambincl = -1; |
| 397 |
schorsch |
2.4 |
memset(rp->amblval, '\0', sizeof(rp->amblval)); |
| 398 |
greg |
2.1 |
for (i = AMBLLEN+1; i--; ) |
| 399 |
|
|
rp->amblndx[i] = -1; |
| 400 |
greg |
2.22 |
|
| 401 |
|
|
/* PMAP: restore photon mapping defaults */ |
| 402 |
|
|
ray_defaults_pmap(rp); |
| 403 |
greg |
2.1 |
} |
