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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Octree drawing operations for OpenGL driver. |
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* Geometry drawing operations for OpenGL driver. |
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*/ |
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#include <string.h> |
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#include "rtio.h" |
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#include "radogl.h" |
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#include "rhdriver.h" |
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#include "rhd_odraw.h" |
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#ifndef MAXOCTREE |
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#define MAXOCTREE 8 /* maximum octrees to load at once */ |
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#ifndef MAXGEO |
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#define MAXGEO 8 /* maximum geometry list length */ |
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#endif |
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#ifndef MAXPORT |
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#define MAXPORT (MAXGEO*4) /* maximum number of portal files */ |
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#endif |
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static struct otEntry { |
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char *otfile; /* octree file name */ |
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int gmPortals = 0; /* current portal GL list id */ |
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static int Nlists = 0; /* number of lists allocated */ |
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static char *curportlist[MAXPORT]; /* current portal list */ |
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static char *newportlist[MAXPORT]; /* new portal file list */ |
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static struct gmEntry { |
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char *gfile; /* geometry file name */ |
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FVECT cent; /* centroid */ |
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FLOAT rad; /* radius */ |
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RREAL rad; /* radius */ |
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int listid; /* display list identifier */ |
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} otCurrent[MAXOCTREE], otNext[MAXOCTREE]; /* current and next list */ |
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int nlists; /* number of lists allocated */ |
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} gmCurrent[MAXGEO], gmNext[MAXGEO]; /* current and next list */ |
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#define FORALLOCT(ot,i) for (i=0;i<MAXOCTREE&&ot[i].otfile!=NULL;i++) |
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#define FORALLGEOM(ot,i) for (i=0;i<MAXGEO&&ot[i].gfile!=NULL;i++) |
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#define FORALLPORT(pl,i) for (i=0;i<MAXPORT&&pl[i]!=NULL;i++) |
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otNewOctree(fname) /* add new octree to next list */ |
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char *fname; |
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extern void |
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gmNewGeom( /* add new geometry to next list */ |
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char *file |
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) |
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{ |
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register int i, j; |
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/* check if already in next list */ |
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FORALLOCT(otNext, i) |
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if (!strcmp(fname, otNext[i].otfile)) |
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FORALLGEOM(gmNext, i) |
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if (!strcmp(file, gmNext[i].gfile)) |
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return; |
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if (i >= MAXOCTREE) { |
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if (i >= MAXGEO) { |
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error(WARNING, "too many section octrees -- ignoring extra"); |
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return; |
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} |
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/* check if copy in current list */ |
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FORALLOCT(otCurrent, j) |
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if (!strcmp(fname, otCurrent[j].otfile)) { |
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copystruct(&otNext[i], &otCurrent[i]); |
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FORALLGEOM(gmCurrent, j) |
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if (!strcmp(file, gmCurrent[j].gfile)) { |
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gmNext[i] = gmCurrent[j]; |
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return; |
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} |
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/* else load new octree */ |
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otNext[i].otfile = fname; |
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gmNext[i].gfile = savestr(file); |
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dolights = 0; |
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otNext[i].listid = rgl_octlist(fname, otNext[i].cent, &otNext[i].rad); |
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domats = 1; |
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gmNext[i].listid = rgl_octlist(file, gmNext[i].cent, &gmNext[i].rad, |
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&gmNext[i].nlists); |
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gmNext[i].rad *= 1.732; /* go to corners */ |
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#ifdef DEBUG |
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fprintf(stderr, "Loaded octree \"%s\" into listID %d with radius %f\n", |
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fname, otNext[i].listid, otNext[i].rad); |
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file, gmNext[i].listid, gmNext[i].rad); |
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#endif |
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} |
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otEndOctree() /* make next list current */ |
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extern void |
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gmEndGeom(void) /* make next list current */ |
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{ |
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register int i, j; |
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FORALLOCT(otCurrent, i) { |
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FORALLOCT(otNext, j) |
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if (otNext[j].listid == otCurrent[i].listid) |
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FORALLGEOM(gmCurrent, i) { |
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FORALLGEOM(gmNext, j) |
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if (gmNext[j].listid == gmCurrent[i].listid) |
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break; |
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if (j >= MAXOCTREE || otNext[j].otfile == NULL) |
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glDeleteLists(otCurrent[i].listid, 1); /* not found */ |
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if (j >= MAXGEO || gmNext[j].gfile == NULL) { |
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glDeleteLists(gmCurrent[i].listid, /* not found */ |
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gmCurrent[i].nlists); |
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freestr(gmCurrent[i].gfile); |
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} |
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} |
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bcopy((char *)otNext, (char *)otCurrent, sizeof(otNext)); |
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otNext[0].otfile = NULL; |
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memcpy((void *)gmCurrent, (void *)gmNext, sizeof(gmNext)); |
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memset((void *)gmNext, '\0', sizeof(gmNext)); |
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} |
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int |
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otDrawOctrees() /* draw current list of octrees */ |
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extern int |
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gmDrawGeom(void) /* draw current list of octrees */ |
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{ |
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register int i; |
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register int n; |
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FORALLOCT(otCurrent, i) |
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glCallList(otCurrent[i].listid); |
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return(i); |
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FORALLGEOM(gmCurrent, n) |
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glCallList(gmCurrent[n].listid); |
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return(n); |
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} |
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otDepthLimit(dl, vorg, vdir) /* compute approximate depth limits for view */ |
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double dl[2]; |
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FVECT vorg, vdir; |
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extern void |
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gmDrawPortals( /* draw portals with specific RGBA value */ |
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int r, |
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int g, |
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int b, |
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int a |
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) |
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{ |
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if (!gmPortals || (r<0) & (g<0) & (b<0) & (a<0)) |
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return; |
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glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT| |
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GL_POLYGON_BIT|GL_LIGHTING_BIT); |
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glDisable(GL_LIGHTING); |
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glDisable(GL_DITHER); |
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glShadeModel(GL_FLAT); |
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
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/* don't actually write depth */ |
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glDepthMask(GL_FALSE); |
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/* draw only selected channels */ |
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glColorMask(r>=0, g>=0, b>=0, a>=0); |
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glColor4ub(r&0xff, g&0xff, b&0xff, a&0xff); |
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glCallList(gmPortals); /* draw them portals */ |
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glPopAttrib(); |
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} |
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|
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extern void |
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gmDepthLimit( /* compute approximate depth limits for view */ |
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double dl[2], |
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FVECT vorg, |
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FVECT vdir |
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) |
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{ |
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FVECT v; |
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double dcent; |
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register int i; |
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dl[0] = FHUGE; dl[1] = 0.; |
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FORALLOCT(otCurrent, i) { |
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VSUB(v, otCurrent[i].cent, vorg); |
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FORALLGEOM(gmCurrent, i) { |
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VSUB(v, gmCurrent[i].cent, vorg); |
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dcent = DOT(v, vdir); |
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if (dl[0] > dcent-otCurrent[i].rad) |
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dl[0] = dcent-otCurrent[i].rad; |
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if (dl[1] < dcent+otCurrent[i].rad) |
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dl[1] = dcent+otCurrent[i].rad; |
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if (dl[0] > dcent-gmCurrent[i].rad) |
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dl[0] = dcent-gmCurrent[i].rad; |
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if (dl[1] < dcent+gmCurrent[i].rad) |
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dl[1] = dcent+gmCurrent[i].rad; |
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} |
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if (dl[0] < 0.) |
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dl[0] = 0.; |
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} |
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extern void |
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gmNewPortal( /* add portal file(s) to our new list */ |
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char *pflist |
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) |
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{ |
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register int i; |
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char newfile[128]; |
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|
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if (pflist == NULL) |
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return; |
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while ((pflist = nextword(newfile, sizeof(newfile), pflist)) != NULL) { |
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FORALLPORT(newportlist,i) |
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if (!strcmp(newportlist[i], newfile)) |
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goto endloop; /* in list already */ |
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if (i >= MAXPORT) { |
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error(WARNING, "too many portals -- ignoring extra"); |
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return; |
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} |
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newportlist[i] = savestr(newfile); |
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endloop:; |
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} |
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} |
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static int |
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sstrcmp(ss0, ss1) |
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char **ss0, **ss1; |
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{ |
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return(strcmp(*ss0, *ss1)); |
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} |
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extern int |
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gmEndPortal(void) /* close portal list and return GL list */ |
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{ |
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register int n; |
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|
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FORALLPORT(newportlist, n); |
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if (!n) { /* free old GL list */ |
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if (gmPortals) |
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glDeleteLists(gmPortals, Nlists); |
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gmPortals = 0; |
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} else |
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qsort(newportlist, n, sizeof(char *), sstrcmp); |
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FORALLPORT(newportlist, n) /* compare sorted lists */ |
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if (curportlist[n] == NULL || |
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strcmp(curportlist[n],newportlist[n])) { |
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/* load new list */ |
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if (gmPortals) |
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glDeleteLists(gmPortals, 1); |
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FORALLPORT(newportlist, n); |
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dolights = 0; |
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domats = 0; |
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gmPortals = rgl_filelist(n, newportlist, &Nlists); |
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break; |
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} |
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FORALLPORT(curportlist, n) /* free old file list */ |
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freestr(curportlist[n]); |
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memcpy((void *)curportlist, (void *)newportlist, sizeof(newportlist)); |
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memset((void *)newportlist, '\0', sizeof(newportlist)); |
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return(gmPortals); /* return GL list id */ |
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} |
