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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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|
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/* |
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* Routines for loading and displaying Radiance objects under OpenGL in rholo. |
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*/ |
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|
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#include "radogl.h" |
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#include "tonemap.h" |
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#include "rhdisp.h" |
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#include "rhdriver.h" |
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#include "rhdobj.h" |
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|
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extern FILE *sstdout; /* user standard output */ |
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|
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char rhdcmd[DO_NCMDS][8] = DO_INIT; /* user command list */ |
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|
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int (*dobj_lightsamp)() = NULL; /* pointer to function to get lights */ |
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|
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#define AVGREFL 0.5 /* assumed average reflectance */ |
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|
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#define MAXAC 64 /* maximum number of args */ |
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|
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#ifndef MINTHRESH |
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#define MINTHRESH 7.0 /* source threshold w.r.t. mean */ |
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#endif |
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|
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#ifndef NALT |
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#define NALT 11 /* # sampling altitude angles */ |
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#endif |
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#ifndef NAZI |
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#define NAZI ((int)(PI/2.*NALT+.5)) |
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#endif |
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|
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typedef struct dlights { |
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struct dlights *next; /* next in lighting set list */ |
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FVECT lcent; /* computed lighting center */ |
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double ravg; /* harmonic mean free range radius */ |
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TMbright larb; /* average reflected brightness */ |
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COLOR lamb; /* local ambient value */ |
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short nl; /* number of lights in this set */ |
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struct lsource { |
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FVECT direc; /* source direction */ |
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double omega; /* source solid angle */ |
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COLOR val; /* source color */ |
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} li[MAXLIGHTS]; /* light sources */ |
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} DLIGHTS; /* a light source set */ |
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|
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typedef struct dobject { |
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struct dobject *next; /* next object in list */ |
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char name[64]; /* object name */ |
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FVECT center; /* orig. object center */ |
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FLOAT radius; /* orig. object radius */ |
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int listid; /* GL display list identifier */ |
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int rtp[3]; /* associated rtrace process */ |
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DLIGHTS *ol; /* object lights */ |
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FULLXF xfb; /* coordinate transform */ |
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short drawcode; /* drawing code */ |
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short xfac; /* transform argument count */ |
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char *xfav[MAXAC+1]; /* transform args */ |
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} DOBJECT; /* a displayable object */ |
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|
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static DLIGHTS *dlightsets; /* lighting sets */ |
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static DOBJECT *dobjects; /* display object list */ |
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static DOBJECT *curobj; /* current (last referred) object */ |
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static int lastxfac; /* last number of transform args */ |
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static char *lastxfav[MAXAC+1]; /* saved transform arguments */ |
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|
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#define RTARGC 8 |
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static char *rtargv[RTARGC+1] = {"rtrace", "-h-", "-w-", "-fdd", |
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"-x", "1", "-oL"}; |
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|
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static struct { |
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int nsamp; /* number of ray samples */ |
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COLOR val; /* value (sum) */ |
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} ssamp[NALT][NAZI]; /* current sphere samples */ |
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|
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#define curname (curobj==NULL ? (char *)NULL : curobj->name) |
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|
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|
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static DOBJECT * |
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getdobj(nm) /* get object from list by name */ |
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char *nm; |
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{ |
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register DOBJECT *op; |
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|
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if (nm == NULL) |
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return(NULL); |
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if (nm == curname) |
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return(curobj); |
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for (op = dobjects; op != NULL; op = op->next) |
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if (!strcmp(op->name, nm)) |
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break; |
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return(op); |
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} |
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|
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|
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static |
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freedobj(op) /* free resources and memory assoc. with op */ |
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register DOBJECT *op; |
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{ |
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int foundlink = 0; |
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DOBJECT ohead; |
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register DOBJECT *opl; |
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|
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if (op == NULL) |
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return(0); |
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ohead.next = dobjects; |
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for (opl = &ohead; opl->next != NULL; opl = opl->next) { |
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if (opl->next == op && (opl->next = op->next) == NULL) |
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break; |
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foundlink += opl->next->listid == op->listid; |
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} |
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dobjects = ohead.next; |
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if (!foundlink) { |
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glDeleteLists(op->listid, 1); |
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close_process(op->rtp); |
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} |
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while (op->xfac) |
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freestr(op->xfav[--op->xfac]); |
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free((char *)op); |
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return(1); |
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} |
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|
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|
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static |
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savedxf(op) /* save transform for display object */ |
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register DOBJECT *op; |
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{ |
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/* free old */ |
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while (lastxfac) |
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freestr(lastxfav[--lastxfac]); |
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/* nothing to save? */ |
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if (op == NULL) { |
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lastxfav[0] = NULL; |
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return(0); |
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} |
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/* else save new */ |
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for (lastxfac = 0; lastxfac < op->xfac; lastxfac++) |
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lastxfav[lastxfac] = savestr(op->xfav[lastxfac]); |
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lastxfav[lastxfac] = NULL; |
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return(1); |
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} |
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|
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|
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static |
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ssph_sample(clr, direc, pos) /* add sample to current source sphere */ |
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COLR clr; |
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FVECT direc, pos; |
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{ |
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COLOR col; |
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double d; |
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register int alt, azi; |
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|
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if (dlightsets == NULL) |
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return; |
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if (pos == NULL) |
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d = FHUGE; /* sample is at infinity */ |
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else if ((d = (pos[0] - dlightsets->lcent[0])*direc[0] + |
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(pos[1] - dlightsets->lcent[1])*direc[1] + |
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(pos[2] - dlightsets->lcent[2])*direc[2]) > FTINY) |
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dlightsets->ravg += 1./d; |
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else |
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return; /* sample is behind us */ |
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alt = NALT*(1.-FTINY)*(.5*(1.+FTINY) + direc[2]*.5); |
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azi = NAZI*(1.-FTINY)*(.5*(1.+FTINY) + .5/PI*atan2(direc[1],direc[0])); |
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colr_color(col, clr); |
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addcolor(ssamp[alt][azi].val, col); |
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ssamp[alt][azi].nsamp++; |
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} |
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|
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|
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static |
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ssph_direc(direc, alt, azi) /* compute sphere sampling direction */ |
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FVECT direc; |
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int alt, azi; |
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{ |
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double phi, d; |
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|
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direc[2] = 2./NALT*(alt+.5) - 1.; |
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d = sqrt(1. - direc[2]*direc[2]); |
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phi = 2.*PI/NAZI*(azi+.5) - PI; |
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direc[0] = d*cos(phi); |
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direc[1] = d*sin(phi); |
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} |
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|
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|
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static int |
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ssph_neigh(sp, next) /* neighbor counter on sphere */ |
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register int sp[2]; |
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int next; |
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{ |
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static short nneigh = 0; /* neighbor count */ |
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static short neighlist[NAZI+6][2]; /* neighbor list (0 is home) */ |
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register int i; |
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|
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if (next) { |
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if (nneigh <= 0) |
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return(0); |
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sp[0] = neighlist[--nneigh][0]; |
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sp[1] = neighlist[nneigh][1]; |
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return(1); |
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} |
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if (sp[0] < 0 | sp[0] >= NALT | sp[1] < 0 | sp[1] >= NAZI) |
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return(nneigh=0); |
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neighlist[0][0] = sp[0]; neighlist[0][1] = sp[1]; |
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nneigh = 1; |
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if (sp[0] == 0) { |
212 |
neighlist[nneigh][0] = 1; |
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neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
214 |
neighlist[nneigh][0] = 1; |
215 |
neighlist[nneigh++][1] = sp[1]; |
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neighlist[nneigh][0] = 1; |
217 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
218 |
for (i = 0; i < NAZI; i++) |
219 |
if (i != sp[1]) { |
220 |
neighlist[nneigh][0] = 0; |
221 |
neighlist[nneigh++][1] = i; |
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} |
223 |
} else if (sp[0] == NALT-1) { |
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neighlist[nneigh][0] = NALT-2; |
225 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
226 |
neighlist[nneigh][0] = NALT-2; |
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neighlist[nneigh++][1] = sp[1]; |
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neighlist[nneigh][0] = NALT-2; |
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neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
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for (i = 0; i < NAZI; i++) |
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if (i != sp[1]) { |
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neighlist[nneigh][0] = NALT-1; |
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neighlist[nneigh++][1] = i; |
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} |
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} else { |
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neighlist[nneigh][0] = sp[0]-1; |
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neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
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neighlist[nneigh][0] = sp[0]-1; |
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neighlist[nneigh++][1] = sp[1]; |
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neighlist[nneigh][0] = sp[0]-1; |
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neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
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neighlist[nneigh][0] = sp[0]; |
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neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
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neighlist[nneigh][0] = sp[0]; |
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neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
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neighlist[nneigh][0] = sp[0]+1; |
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neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
248 |
neighlist[nneigh][0] = sp[0]+1; |
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neighlist[nneigh++][1] = sp[1]; |
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neighlist[nneigh][0] = sp[0]+1; |
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neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
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} |
253 |
return(nneigh); |
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} |
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|
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|
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static |
258 |
ssph_compute() /* compute source set from sphere samples */ |
259 |
{ |
260 |
int ncells, nsamps; |
261 |
COLOR csum; |
262 |
FVECT v; |
263 |
double d, thresh, maxbr; |
264 |
int maxalt, maxazi, spos[2]; |
265 |
register int alt, azi; |
266 |
register struct lsource *ls; |
267 |
/* count & average sampled cells */ |
268 |
setcolor(csum, 0., 0., 0.); |
269 |
ncells = nsamps = 0; |
270 |
for (alt = 0; alt < NALT; alt++) |
271 |
for (azi = 0; azi < NAZI; azi++) |
272 |
if (ssamp[alt][azi].nsamp) { |
273 |
if (ssamp[alt][azi].nsamp > 1) { |
274 |
d = 1.0/ssamp[alt][azi].nsamp; |
275 |
scalecolor(ssamp[alt][azi].val, d); |
276 |
} |
277 |
addcolor(csum, ssamp[alt][azi].val); |
278 |
nsamps += ssamp[alt][azi].nsamp; |
279 |
ncells++; |
280 |
} |
281 |
if (dlightsets == NULL | ncells < NALT*NAZI/4) { |
282 |
bzero((char *)ssamp, sizeof(ssamp)); |
283 |
return(0); |
284 |
} |
285 |
/* harmonic mean distance */ |
286 |
if (dlightsets->ravg > FTINY) |
287 |
dlightsets->ravg = nsamps / dlightsets->ravg; |
288 |
else |
289 |
dlightsets->ravg = FHUGE; |
290 |
/* light source threshold */ |
291 |
thresh = MINTHRESH*bright(csum)/ncells; |
292 |
/* avg. reflected brightness */ |
293 |
d = AVGREFL / (double)ncells; |
294 |
scalecolor(csum, d); |
295 |
if (tmCvColors(&dlightsets->larb, TM_NOCHROM, csum, 1) != TM_E_OK) |
296 |
error(CONSISTENCY, "bad tone mapping in ssph_compute"); |
297 |
/* greedy light source clustering */ |
298 |
while (dlightsets->nl < MAXLIGHTS) { |
299 |
maxbr = 0.; /* find brightest cell */ |
300 |
for (alt = 0; alt < NALT; alt++) |
301 |
for (azi = 0; azi < NAZI; azi++) |
302 |
if ((d = bright(ssamp[alt][azi].val)) > maxbr) { |
303 |
maxalt = alt; maxazi = azi; |
304 |
maxbr = d; |
305 |
} |
306 |
if (maxbr < thresh) /* below threshold? */ |
307 |
break; |
308 |
ls = dlightsets->li + dlightsets->nl++; |
309 |
spos[0] = maxalt; spos[1] = maxazi; /* cluster */ |
310 |
for (ssph_neigh(spos, 0); ssph_neigh(spos, 1); ) { |
311 |
alt = spos[0]; azi = spos[1]; |
312 |
if ((d = bright(ssamp[alt][azi].val)) < .75*thresh) |
313 |
continue; /* too dim */ |
314 |
ssph_direc(v, alt, azi); /* else add it in */ |
315 |
VSUM(ls->direc, ls->direc, v, d); |
316 |
ls->omega++; |
317 |
addcolor(ls->val, ssamp[alt][azi].val); |
318 |
setcolor(ssamp[alt][azi].val, 0., 0., 0.); |
319 |
} |
320 |
d = 1./ls->omega; /* avg. brightness */ |
321 |
scalecolor(ls->val, d); |
322 |
ls->omega *= 4.*PI/(NALT*NAZI); /* solid angle */ |
323 |
normalize(ls->direc); /* direction */ |
324 |
} |
325 |
/* compute ambient remainder */ |
326 |
for (alt = 0; alt < NALT; alt++) |
327 |
for (azi = 0; azi < NAZI; azi++) |
328 |
if (ssamp[alt][azi].nsamp) |
329 |
addcolor(dlightsets->lamb, ssamp[alt][azi].val); |
330 |
d = 1.0/ncells; |
331 |
scalecolor(dlightsets->lamb, d); |
332 |
/* clear sphere sample array */ |
333 |
bzero((char *)ssamp, sizeof(ssamp)); |
334 |
return(ncells); |
335 |
} |
336 |
|
337 |
|
338 |
static |
339 |
getdlights(op, force) /* get lights for display object */ |
340 |
register DOBJECT *op; |
341 |
int force; |
342 |
{ |
343 |
double d2, mind2 = FHUGE*FHUGE; |
344 |
FVECT ocent; |
345 |
VIEW cvw; |
346 |
register DLIGHTS *dl; |
347 |
|
348 |
op->ol = NULL; |
349 |
if (op->drawcode != DO_LIGHT) |
350 |
return(0); |
351 |
/* check for usable light set */ |
352 |
multp3(ocent, op->center, op->xfb.f.xfm); |
353 |
for (dl = dlightsets; dl != NULL; dl = dl->next) |
354 |
if ((d2 = dist2(dl->lcent, ocent)) < mind2) { |
355 |
op->ol = dl; |
356 |
mind2 = d2; |
357 |
} |
358 |
/* the following is heuristic */ |
359 |
d2 = 2.*op->radius*op->xfb.f.sca; d2 *= d2; |
360 |
if ((dl = op->ol) != NULL && (mind2 < 0.0625*dl->ravg*dl->ravg || |
361 |
mind2 < 4.*op->radius*op->xfb.f.sca*op->radius*op->xfb.f.sca)) |
362 |
return(1); |
363 |
if (!force) |
364 |
return(0); |
365 |
/* need to compute new light set */ |
366 |
copystruct(&cvw, &stdview); |
367 |
cvw.type = VT_PER; |
368 |
VCOPY(cvw.vp, ocent); |
369 |
cvw.vup[0] = 1.; cvw.vup[1] = cvw.vup[2] = 0.; |
370 |
cvw.horiz = 90; cvw.vert = 90.; |
371 |
beam_init(1); /* query beams through center */ |
372 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = 1.; |
373 |
setview(&cvw); beam_view(&cvw, 0, 0); |
374 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = -1.; |
375 |
setview(&cvw); beam_view(&cvw, 0, 0); |
376 |
cvw.vup[0] = cvw.vup[1] = 0.; cvw.vup[2] = 1.; |
377 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = 1.; |
378 |
setview(&cvw); beam_view(&cvw, 0, 0); |
379 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = -1.; |
380 |
setview(&cvw); beam_view(&cvw, 0, 0); |
381 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = 1.; |
382 |
setview(&cvw); beam_view(&cvw, 0, 0); |
383 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = -1.; |
384 |
setview(&cvw); beam_view(&cvw, 0, 0); |
385 |
/* allocate new light set */ |
386 |
dl = (DLIGHTS *)calloc(1, sizeof(DLIGHTS)); |
387 |
if (dl == NULL) |
388 |
goto memerr; |
389 |
VCOPY(dl->lcent, ocent); |
390 |
/* push onto our light set list */ |
391 |
dl->next = dlightsets; |
392 |
dlightsets = dl; |
393 |
dobj_lightsamp = ssph_sample; /* get beams from server */ |
394 |
imm_mode = beam_sync(-1) > 0; |
395 |
while (imm_mode) |
396 |
if (serv_result() == DS_SHUTDOWN) |
397 |
quit(0); |
398 |
if (!ssph_compute()) { /* compute light sources from sphere */ |
399 |
dlightsets = dl->next; |
400 |
free((char *)dl); |
401 |
return(0); |
402 |
} |
403 |
op->ol = dl; |
404 |
return(1); |
405 |
memerr: |
406 |
error(SYSTEM, "out of memory in getdlights"); |
407 |
} |
408 |
|
409 |
|
410 |
static int |
411 |
cmderror(cn, err) /* report command error */ |
412 |
int cn; |
413 |
char *err; |
414 |
{ |
415 |
sprintf(errmsg, "%s: %s", rhdcmd[cn], err); |
416 |
error(COMMAND, errmsg); |
417 |
return(cn); |
418 |
} |
419 |
|
420 |
|
421 |
int |
422 |
dobj_command(cmd, args) /* run object display command */ |
423 |
char *cmd; |
424 |
register char *args; |
425 |
{ |
426 |
int cn, na, doxfm; |
427 |
register int nn; |
428 |
char *alist[MAXAC+1], *nm; |
429 |
/* find command */ |
430 |
for (cn = 0; cn < DO_NCMDS; cn++) |
431 |
if (!strcmp(cmd, rhdcmd[cn])) |
432 |
break; |
433 |
if (cn >= DO_NCMDS) |
434 |
return(-1); /* not in our list */ |
435 |
/* make argument list */ |
436 |
for (na = 0; *args; na++) { |
437 |
if (na > MAXAC) |
438 |
goto toomany; |
439 |
alist[na] = args; |
440 |
while (*args && !isspace(*args)) |
441 |
args++; |
442 |
while (isspace(*args)) |
443 |
*args++ = '\0'; |
444 |
} |
445 |
alist[na] = NULL; |
446 |
/* execute command */ |
447 |
switch (cn) { |
448 |
case DO_LOAD: /* load an octree */ |
449 |
if (na == 1) |
450 |
dobj_load(alist[0], alist[0]); |
451 |
else if (na == 2) |
452 |
dobj_load(alist[0], alist[1]); |
453 |
else |
454 |
return(cmderror(cn, "need octree [name]")); |
455 |
break; |
456 |
case DO_UNLOAD: /* unload an object */ |
457 |
if (na > 1) goto toomany; |
458 |
if (na && alist[0][0] == '*') |
459 |
dobj_cleanup(); |
460 |
else |
461 |
dobj_unload(na ? alist[0] : curname); |
462 |
break; |
463 |
case DO_XFORM: /* transform object */ |
464 |
case DO_MOVE: |
465 |
if (na && alist[0][0] != '-') { |
466 |
nm = alist[0]; nn = 1; |
467 |
} else { |
468 |
nm = curname; nn = 0; |
469 |
} |
470 |
if (cn == DO_MOVE && nn >= na) |
471 |
return(cmderror(cn, "missing transform")); |
472 |
dobj_xform(nm, cn==DO_MOVE, na-nn, alist+nn); |
473 |
break; |
474 |
case DO_UNMOVE: /* undo last transform */ |
475 |
dobj_unmove(); |
476 |
break; |
477 |
case DO_OBJECT: /* print object statistics */ |
478 |
dobj_putstats(na ? alist[0] : curname, sstdout); |
479 |
break; |
480 |
case DO_DUP: /* duplicate object */ |
481 |
for (nn = 0; nn < na; nn++) |
482 |
if (alist[nn][0] == '-') |
483 |
break; |
484 |
switch (nn) { |
485 |
case 0: |
486 |
return(cmderror(cn, "need new object name")); |
487 |
case 1: |
488 |
nm = curname; |
489 |
break; |
490 |
case 2: |
491 |
nm = alist[0]; |
492 |
break; |
493 |
default: |
494 |
goto toomany; |
495 |
} |
496 |
if (!dobj_dup(nm, alist[nn-1])) |
497 |
break; |
498 |
if (na > nn) |
499 |
dobj_xform(curname, 1, na-nn, alist+nn); |
500 |
else |
501 |
curobj->drawcode = DO_HIDE; |
502 |
break; |
503 |
case DO_SHOW: /* change rendering option */ |
504 |
case DO_LIGHT: |
505 |
case DO_HIDE: |
506 |
if (na > 1) goto toomany; |
507 |
dobj_lighting(na ? alist[0] : curname, cn); |
508 |
break; |
509 |
default: |
510 |
error(CONSISTENCY, "bad command id in dobj_command"); |
511 |
} |
512 |
dev_view(&odev.v); /* redraw */ |
513 |
return(cn); |
514 |
toomany: |
515 |
return(cmderror(cn, "too many arguments")); |
516 |
} |
517 |
|
518 |
|
519 |
dobj_load(oct, nam) /* create/load an octree object */ |
520 |
char *oct, *nam; |
521 |
{ |
522 |
extern char *getlibpath(), *getpath(); |
523 |
char *fpp, fpath[128]; |
524 |
register DOBJECT *op; |
525 |
/* check arguments */ |
526 |
if (oct == NULL) { |
527 |
error(COMMAND, "missing octree"); |
528 |
return(0); |
529 |
} |
530 |
if (nam == NULL) { |
531 |
error(COMMAND, "missing name"); |
532 |
return(0); |
533 |
} |
534 |
if (*nam == '*' | *nam == '-') { |
535 |
error(COMMAND, "illegal name"); |
536 |
return(0); |
537 |
} |
538 |
/* get octree path */ |
539 |
if ((fpp = getpath(oct, getlibpath(), R_OK)) == NULL) { |
540 |
sprintf(errmsg, "cannot find octree \"%s\"", oct); |
541 |
error(COMMAND, errmsg); |
542 |
return(0); |
543 |
} |
544 |
strcpy(fpath, fpp); |
545 |
freedobj(getdobj(nam)); /* free previous use of nam */ |
546 |
op = (DOBJECT *)malloc(sizeof(DOBJECT)); |
547 |
if (op == NULL) |
548 |
error(SYSTEM, "out of memory in dobj_load"); |
549 |
/* set struct fields */ |
550 |
strcpy(op->name, nam); |
551 |
op->ol = NULL; |
552 |
op->drawcode = DO_HIDE; |
553 |
setident4(op->xfb.f.xfm); op->xfb.f.sca = 1.; |
554 |
setident4(op->xfb.b.xfm); op->xfb.b.sca = 1.; |
555 |
op->xfav[op->xfac=0] = NULL; |
556 |
/* load octree into display list */ |
557 |
dolights = 0; |
558 |
op->listid = rgl_octlist(fpath, op->center, &op->radius); |
559 |
/* start rtrace */ |
560 |
rtargv[RTARGC-1] = fpath; |
561 |
rtargv[RTARGC] = NULL; |
562 |
open_process(op->rtp, rtargv); |
563 |
/* insert into main list */ |
564 |
op->next = dobjects; |
565 |
curobj = dobjects = op; |
566 |
savedxf(NULL); |
567 |
return(1); |
568 |
} |
569 |
|
570 |
|
571 |
dobj_unload(nam) /* free the named object */ |
572 |
char *nam; |
573 |
{ |
574 |
register DOBJECT *op; |
575 |
|
576 |
if ((op = getdobj(nam)) == NULL) { |
577 |
error(COMMAND, "no object"); |
578 |
return(0); |
579 |
} |
580 |
freedobj(op); |
581 |
savedxf(curobj = NULL); |
582 |
return(1); |
583 |
} |
584 |
|
585 |
|
586 |
dobj_cleanup() /* free all resources */ |
587 |
{ |
588 |
register DLIGHTS *lp; |
589 |
|
590 |
while (dobjects != NULL) |
591 |
freedobj(dobjects); |
592 |
savedxf(curobj = NULL); |
593 |
while ((lp = dlightsets) != NULL) { |
594 |
dlightsets = lp->next; |
595 |
free((char *)lp); |
596 |
} |
597 |
return(1); |
598 |
} |
599 |
|
600 |
|
601 |
dobj_xform(nam, add, ac, av) /* set/add transform for nam */ |
602 |
char *nam; |
603 |
int add, ac; |
604 |
char **av; |
605 |
{ |
606 |
register DOBJECT *op; |
607 |
|
608 |
if ((op = getdobj(nam)) == NULL) { |
609 |
error(COMMAND, "no object"); |
610 |
return(0); |
611 |
} |
612 |
if (add) add = op->xfac; |
613 |
if (ac + add > MAXAC) { |
614 |
error(COMMAND, "too many transform arguments"); |
615 |
return(0); |
616 |
} |
617 |
savedxf(curobj = op); |
618 |
if (!add) |
619 |
while (op->xfac) |
620 |
freestr(op->xfav[--op->xfac]); |
621 |
while (ac--) |
622 |
op->xfav[op->xfac++] = savestr(*av++); |
623 |
op->xfav[op->xfac] = NULL; |
624 |
if (fullxf(&op->xfb, op->xfac, op->xfav) != op->xfac) { |
625 |
error(COMMAND, "bad transform arguments"); |
626 |
dobj_unmove(); |
627 |
savedxf(op); /* save current transform instead */ |
628 |
return(0); |
629 |
} |
630 |
/* don't know local lights anymore */ |
631 |
getdlights(op, 0); |
632 |
return(1); |
633 |
} |
634 |
|
635 |
|
636 |
dobj_putstats(nam, fp) /* put out statistics for nam */ |
637 |
char *nam; |
638 |
FILE *fp; |
639 |
{ |
640 |
FVECT ocent; |
641 |
register DOBJECT *op; |
642 |
register int i; |
643 |
|
644 |
if (nam == NULL) { |
645 |
error(COMMAND, "no current object"); |
646 |
return(0); |
647 |
} |
648 |
if (nam[0] == '*') { |
649 |
i = 0; |
650 |
for (op = dobjects; op != NULL; op = op->next) |
651 |
i += dobj_putstats(op->name, fp); |
652 |
return(i); |
653 |
} |
654 |
if ((op = getdobj(nam)) == NULL) { |
655 |
error(COMMAND, "unknown object"); |
656 |
return(0); |
657 |
} |
658 |
multp3(ocent, op->center, op->xfb.f.xfm); |
659 |
fprintf(fp, "%s: %s, center [%f %f %f], radius %f", op->name, |
660 |
op->drawcode==DO_HIDE ? "hid" : |
661 |
op->drawcode==DO_LIGHT && op->ol!=NULL ? "lit" : |
662 |
"shown", |
663 |
ocent[0],ocent[1],ocent[2], op->radius*op->xfb.f.sca); |
664 |
if (op->xfac) |
665 |
fputs(", (xform", fp); |
666 |
for (i = 0; i < op->xfac; i++) { |
667 |
putc(' ', fp); |
668 |
fputs(op->xfav[i], fp); |
669 |
} |
670 |
if (op->xfac) |
671 |
fputc(')', fp); |
672 |
fputc('\n', fp); |
673 |
return(1); |
674 |
} |
675 |
|
676 |
|
677 |
dobj_unmove() /* undo last transform change */ |
678 |
{ |
679 |
int txfac; |
680 |
char *txfav[MAXAC+1]; |
681 |
|
682 |
if (curobj == NULL) { |
683 |
error(COMMAND, "no current object"); |
684 |
return(0); |
685 |
} |
686 |
/* hold last transform */ |
687 |
bcopy((char *)lastxfav, (char *)txfav, |
688 |
(txfac=lastxfac)*sizeof(char *)); |
689 |
/* save this transform */ |
690 |
bcopy((char *)curobj->xfav, (char *)lastxfav, |
691 |
(lastxfac=curobj->xfac)*sizeof(char *)); |
692 |
/* copy back last transform */ |
693 |
bcopy((char *)txfav, (char *)curobj->xfav, |
694 |
(curobj->xfac=txfac)*sizeof(char *)); |
695 |
/* set matrices */ |
696 |
fullxf(&curobj->xfb, curobj->xfac, curobj->xfav); |
697 |
/* don't know local lights anymore */ |
698 |
getdlights(curobj, 0); |
699 |
return(1); |
700 |
} |
701 |
|
702 |
|
703 |
dobj_dup(oldnm, nam) /* duplicate object oldnm as nam */ |
704 |
char *oldnm, *nam; |
705 |
{ |
706 |
register DOBJECT *op, *opdup; |
707 |
/* check arguments */ |
708 |
if ((op = getdobj(oldnm)) == NULL) { |
709 |
error(COMMAND, "no object"); |
710 |
return(0); |
711 |
} |
712 |
if (nam == NULL) { |
713 |
error(COMMAND, "missing name"); |
714 |
return(0); |
715 |
} |
716 |
if (*nam == '*' | *nam == '-') { |
717 |
error(COMMAND, "illegal name"); |
718 |
return(0); |
719 |
} |
720 |
/* allocate and copy struct */ |
721 |
opdup = (DOBJECT *)malloc(sizeof(DOBJECT)); |
722 |
if (opdup == NULL) |
723 |
error(SYSTEM, "out of memory in dobj_dup"); |
724 |
copystruct(opdup, op); |
725 |
/* rename */ |
726 |
strcpy(opdup->name, nam); |
727 |
/* get our own copy of transform */ |
728 |
for (opdup->xfac = 0; opdup->xfac < op->xfac; opdup->xfac++) |
729 |
opdup->xfav[opdup->xfac] = savestr(op->xfav[opdup->xfac]); |
730 |
opdup->xfav[opdup->xfac] = NULL; |
731 |
/* insert it into our list */ |
732 |
opdup->next = dobjects; |
733 |
curobj = dobjects = opdup; |
734 |
return(1); |
735 |
} |
736 |
|
737 |
|
738 |
dobj_lighting(nam, cn) /* set up lighting for display object */ |
739 |
char *nam; |
740 |
int cn; |
741 |
{ |
742 |
int i, res[2]; |
743 |
VIEW *dv; |
744 |
register DOBJECT *op; |
745 |
|
746 |
if (nam == NULL) { |
747 |
error(COMMAND, "no current object"); |
748 |
return(0); |
749 |
} |
750 |
if (nam[0] == '*') { |
751 |
for (op = dobjects; op != NULL; op = op->next) |
752 |
if ((op->drawcode = cn) == DO_LIGHT) |
753 |
getdlights(op, 1); |
754 |
else |
755 |
op->ol = NULL; |
756 |
} else if ((op = getdobj(nam)) == NULL) { |
757 |
error(COMMAND, "unknown object"); |
758 |
return(0); |
759 |
} else if ((op->drawcode = cn) == DO_LIGHT) |
760 |
getdlights(op, 1); |
761 |
else |
762 |
op->ol = NULL; |
763 |
|
764 |
if (dobj_lightsamp != NULL) { /* restore beam set */ |
765 |
dobj_lightsamp = NULL; |
766 |
beam_init(1); |
767 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
768 |
beam_view(dv, res[0], res[1]); |
769 |
beam_sync(1); /* update server */ |
770 |
} |
771 |
} |
772 |
|
773 |
|
774 |
double |
775 |
dobj_trace(rorg, rdir) /* check for ray intersection with objects */ |
776 |
FVECT rorg, rdir; |
777 |
{ |
778 |
register DOBJECT *op; |
779 |
FVECT xorg, xdir; |
780 |
double darr[6], mindist = FHUGE; |
781 |
/* check each visible object */ |
782 |
for (op = dobjects; op != NULL; op = op->next) { |
783 |
if (op->drawcode == DO_HIDE) |
784 |
continue; |
785 |
if (op->xfac) { /* transform ray */ |
786 |
multp3(xorg, rorg, op->xfb.b.xfm); |
787 |
multv3(xdir, rdir, op->xfb.b.xfm); |
788 |
VCOPY(darr, xorg); VCOPY(darr+3, xdir); |
789 |
} else { |
790 |
VCOPY(darr, rorg); VCOPY(darr+3, rdir); |
791 |
} |
792 |
/* trace it */ |
793 |
if (process(op->rtp, darr, darr, sizeof(double), |
794 |
6*sizeof(double)) != sizeof(double)) |
795 |
error(SYSTEM, "rtrace communication error"); |
796 |
/* get closest */ |
797 |
if ((darr[0] *= op->xfb.f.sca) < mindist) |
798 |
mindist = darr[0]; |
799 |
} |
800 |
return(mindist); |
801 |
} |
802 |
|
803 |
|
804 |
dobj_render() /* render our objects in OpenGL */ |
805 |
{ |
806 |
GLboolean normalizing; |
807 |
GLfloat vec[4]; |
808 |
register DOBJECT *op; |
809 |
register int i; |
810 |
/* anything to render? */ |
811 |
for (op = dobjects; op != NULL; op = op->next) |
812 |
if (op->drawcode != DO_HIDE) |
813 |
break; |
814 |
if (op == NULL) |
815 |
return(1); |
816 |
/* set up general rendering params */ |
817 |
glGetBooleanv(GL_NORMALIZE, &normalizing); |
818 |
glPushAttrib(GL_LIGHTING_BIT|GL_TRANSFORM_BIT| |
819 |
GL_DEPTH_BUFFER_BIT|GL_POLYGON_BIT); |
820 |
glDepthFunc(GL_LESS); |
821 |
glEnable(GL_DEPTH_TEST); |
822 |
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
823 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
824 |
glShadeModel(GL_SMOOTH); |
825 |
glFrontFace(GL_CCW); |
826 |
glDisable(GL_CULL_FACE); |
827 |
for (i = MAXLIGHTS; i--; ) |
828 |
glDisable(glightid[i]); |
829 |
glEnable(GL_LIGHTING); |
830 |
rgl_checkerr("setting rendering modes in dobj_render"); |
831 |
/* render each object */ |
832 |
for (op = dobjects; op != NULL; op = op->next) { |
833 |
if (op->drawcode == DO_HIDE) |
834 |
continue; |
835 |
/* set up lighting */ |
836 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) { |
837 |
BYTE pval; |
838 |
double expval, d; |
839 |
|
840 |
if (tmMapPixels(&pval, &op->ol->larb, TM_NOCHROM, 1) |
841 |
!= TM_E_OK) |
842 |
error(CONSISTENCY, "dobj_render w/o tone map"); |
843 |
expval = pval * (WHTEFFICACY/256.) / |
844 |
tmLuminance(op->ol->larb); |
845 |
vec[0] = expval * colval(op->ol->lamb,RED); |
846 |
vec[1] = expval * colval(op->ol->lamb,GRN); |
847 |
vec[2] = expval * colval(op->ol->lamb,BLU); |
848 |
vec[3] = 1.; |
849 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
850 |
for (i = op->ol->nl; i--; ) { |
851 |
VCOPY(vec, op->ol->li[i].direc); |
852 |
vec[3] = 0.; |
853 |
glLightfv(glightid[i], GL_POSITION, vec); |
854 |
d = expval * op->ol->li[i].omega; |
855 |
vec[0] = d * colval(op->ol->li[i].val,RED); |
856 |
vec[1] = d * colval(op->ol->li[i].val,GRN); |
857 |
vec[2] = d * colval(op->ol->li[i].val,BLU); |
858 |
vec[3] = 1.; |
859 |
glLightfv(glightid[i], GL_SPECULAR, vec); |
860 |
glLightfv(glightid[i], GL_DIFFUSE, vec); |
861 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
862 |
glLightfv(glightid[i], GL_AMBIENT, vec); |
863 |
glEnable(glightid[i]); |
864 |
} |
865 |
} else { |
866 |
vec[0] = vec[1] = vec[2] = 1.; vec[3] = 1.; |
867 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
868 |
} |
869 |
/* set up object transform */ |
870 |
if (op->xfac) { |
871 |
if (!normalizing && op->xfb.f.sca < 1.-FTINY | |
872 |
op->xfb.f.sca > 1.+FTINY) |
873 |
glEnable(GL_NORMALIZE); |
874 |
glMatrixMode(GL_MODELVIEW); |
875 |
glPushMatrix(); |
876 |
/* matrix order works out to same */ |
877 |
#ifdef SMLFLT |
878 |
glMultMatrixf((GLfloat *)op->xfb.f.xfm); |
879 |
#else |
880 |
glMultMatrixd((GLdouble *)op->xfb.f.xfm); |
881 |
#endif |
882 |
} |
883 |
/* render the display list */ |
884 |
glCallList(op->listid); |
885 |
/* restore matrix */ |
886 |
if (op->xfac) { |
887 |
glMatrixMode(GL_MODELVIEW); |
888 |
glPopMatrix(); |
889 |
if (!normalizing) |
890 |
glDisable(GL_NORMALIZE); |
891 |
} |
892 |
/* restore lighting */ |
893 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) |
894 |
for (i = op->ol->nl; i--; ) |
895 |
glDisable(glightid[i]); |
896 |
/* check errors */ |
897 |
rgl_checkerr("rendering object in dobj_render"); |
898 |
} |
899 |
glPopAttrib(); /* restore rendering params */ |
900 |
return(1); |
901 |
} |