src/common/mesh.c

#ifndef lint
static const char RCSid[] = "$Id: mesh.c,v 2.10 2003/07/10 03:30:11 greg Exp $";
#endif
/*
 * Mesh support routines
 */

#include <string.h>

#include "standard.h"
#include "octree.h"
#include "object.h"
#include "otypes.h"
#include "mesh.h"

/* An encoded mesh vertex */
typedef struct {
        int             fl;
        uint32          xyz[3];
        int32           norm;
        uint32          uv[2];
} MCVERT;

#define  MPATCHBLKSIZ   128             /* patch allocation block size */

#define  IO_LEGAL       (IO_BOUNDS|IO_TREE|IO_SCENE)

static MESH     *mlist = NULL;          /* list of loaded meshes */


static unsigned long
cvhash(cvp)                             /* hash an encoded vertex */
MCVERT  *cvp;
{
        unsigned long   hval;
        
        if (!(cvp->fl & MT_V))
                return(0);
        hval = cvp->xyz[0] ^ cvp->xyz[1] << 11 ^ cvp->xyz[2] << 22;
        if (cvp->fl & MT_N)
                hval ^= cvp->norm;
        if (cvp->fl & MT_UV)
                hval ^= cvp->uv[0] ^ cvp->uv[1] << 16;
        return(hval);
}


static int
cvcmp(v1, v2)                           /* compare encoded vertices */
register MCVERT *v1, *v2;
{
        if (v1->fl != v2->fl)
                return(1);
        if (v1->xyz[0] != v2->xyz[0])
                return(1);
        if (v1->xyz[1] != v2->xyz[1])
                return(1);
        if (v1->xyz[2] != v2->xyz[2])
                return(1);
        if (v1->fl & MT_N && v1->norm != v2->norm)
                return(1);
        if (v1->fl & MT_UV) {
                if (v1->uv[0] != v2->uv[0])
                        return(1);
                if (v1->uv[1] != v2->uv[1])
                        return(1);
        }
        return(0);
}


MESH *
getmesh(mname, flags)                   /* get new mesh data reference */
char    *mname;
int     flags;
{
        char  *pathname;
        register MESH  *ms;

        flags &= IO_LEGAL;
        for (ms = mlist; ms != NULL; ms = ms->next)
                if (!strcmp(mname, ms->name)) {
                        ms->nref++;     /* increase reference count */
                        break;
                }
        if (ms == NULL) {               /* load first time */
                ms = (MESH *)calloc(1, sizeof(MESH));
                if (ms == NULL)
                        error(SYSTEM, "out of memory in getmesh");
                ms->name = savestr(mname);
                ms->nref = 1;
                ms->mcube.cutree = EMPTY;
                ms->next = mlist;
                mlist = ms;
        }
        if ((pathname = getpath(mname, getrlibpath(), R_OK)) == NULL) {
                sprintf(errmsg, "cannot find mesh file \"%s\"", mname);
                error(USER, errmsg);
        }
        flags &= ~ms->ldflags;
        if (flags)
                readmesh(ms, pathname, flags);
        return(ms);
}


MESHINST *
getmeshinst(o, flags)                   /* create mesh instance */
OBJREC  *o;
int     flags;
{
        register MESHINST  *ins;

        flags &= IO_LEGAL;
        if ((ins = (MESHINST *)o->os) == NULL) {
                if ((ins = (MESHINST *)malloc(sizeof(MESHINST))) == NULL)
                        error(SYSTEM, "out of memory in getmeshinst");
                if (o->oargs.nsargs < 1)
                        objerror(o, USER, "bad # of arguments");
                if (fullxf(&ins->x, o->oargs.nsargs-1,
                                o->oargs.sarg+1) != o->oargs.nsargs-1)
                        objerror(o, USER, "bad transform");
                if (ins->x.f.sca < 0.0) {
                        ins->x.f.sca = -ins->x.f.sca;
                        ins->x.b.sca = -ins->x.b.sca;
                }
                ins->msh = NULL;
                o->os = (char *)ins;
        }
        if (ins->msh == NULL)
                ins->msh = getmesh(o->oargs.sarg[0], flags);
        else if ((flags &= ~ins->msh->ldflags))
                readmesh(ins->msh,
                        getpath(o->oargs.sarg[0], getrlibpath(), R_OK),
                                flags);
        return(ins);
}


int
getmeshtrivid(tvid, mo, mp, ti)         /* get triangle vertex ID's */
int32   tvid[3];
OBJECT  *mo;
MESH    *mp;
OBJECT  ti;
{
        int             pn = ti >> 10;
        MESHPATCH       *pp;

        if (pn >= mp->npatches)
                return(0);
        pp = &mp->patch[pn];
        ti &= 0x3ff;
        if (!(ti & 0x200)) {            /* local triangle */
                struct PTri     *tp;
                if (ti >= pp->ntris)
                        return(0);
                tp = &pp->tri[ti];
                tvid[0] = tvid[1] = tvid[2] = pn << 8;
                tvid[0] |= tp->v1;
                tvid[1] |= tp->v2;
                tvid[2] |= tp->v3;
                if (pp->trimat != NULL)
                        *mo = pp->trimat[ti];
                else
                        *mo = pp->solemat;
                if (*mo != OVOID)
                        *mo += mp->mat0;
                return(1);
        }
        ti &= ~0x200;
        if (!(ti & 0x100)) {            /* single link vertex */
                struct PJoin1   *tp1;
                if (ti >= pp->nj1tris)
                        return(0);
                tp1 = &pp->j1tri[ti];
                tvid[0] = tp1->v1j;
                tvid[1] = tvid[2] = pn << 8;
                tvid[1] |= tp1->v2;
                tvid[2] |= tp1->v3;
                if ((*mo = tp1->mat) != OVOID)
                        *mo += mp->mat0;
                return(1);
        }
        ti &= ~0x100;
        {                               /* double link vertex */
                struct PJoin2   *tp2;
                if (ti >= pp->nj2tris)
                        return(0);
                tp2 = &pp->j2tri[ti];
                tvid[0] = tp2->v1j;
                tvid[1] = tp2->v2j;
                tvid[2] = pn << 8 | tp2->v3;
                if ((*mo = tp2->mat) != OVOID)
                        *mo += mp->mat0;
        }
        return(1);
}


int
getmeshvert(vp, mp, vid, what)  /* get triangle vertex from ID */
MESHVERT        *vp;
MESH            *mp;
int32           vid;
int             what;
{
        int             pn = vid >> 8;
        MESHPATCH       *pp;
        double          vres;
        register int    i;
        
        vp->fl = 0;
        if (pn >= mp->npatches)
                return(0);
        pp = &mp->patch[pn];
        vid &= 0xff;
        if (vid >= pp->nverts)
                return(0);
                                        /* get location */
        if (what & MT_V) {
                vres = (1./4294967296.)*mp->mcube.cusize;
                for (i = 0; i < 3; i++)
                        vp->v[i] = mp->mcube.cuorg[i] +
                                        (pp->xyz[vid][i] + .5)*vres;
                vp->fl |= MT_V;
        }
                                        /* get normal */
        if (what & MT_N && pp->norm != NULL && pp->norm[vid]) {
                decodedir(vp->n, pp->norm[vid]);
                vp->fl |= MT_N;
        }
                                        /* get (u,v) */
        if (what & MT_UV && pp->uv != NULL && pp->uv[vid][0]) {
                for (i = 0; i < 2; i++)
                        vp->uv[i] = mp->uvlim[0][i] +
                                (mp->uvlim[1][i] - mp->uvlim[0][i])*
                                (pp->uv[vid][i] + .5)*(1./4294967296.);
                vp->fl |= MT_UV;
        }
        return(vp->fl);
}


OBJREC *
getmeshpseudo(mp, mo)           /* get mesh pseudo object for material */
MESH    *mp;
OBJECT  mo;
{
        if (mo < mp->mat0 || mo >= mp->mat0 + mp->nmats)
                error(INTERNAL, "modifier out of range in getmeshpseudo");
        if (mp->pseudo == NULL) {
                register int    i;
                mp->pseudo = (OBJREC *)calloc(mp->nmats, sizeof(OBJREC));
                if (mp->pseudo == NULL)
                        error(SYSTEM, "out of memory in getmeshpseudo");
                for (i = mp->nmats; i--; ) {
                        mp->pseudo[i].omod = mp->mat0 + i;
                        mp->pseudo[i].otype = OBJ_FACE;
                        mp->pseudo[i].oname = "M-Tri";
                }
        }
        return(&mp->pseudo[mo - mp->mat0]);
}


int
getmeshtri(tv, mo, mp, ti, wha) /* get triangle vertices */
MESHVERT        tv[3];
OBJECT          *mo;
MESH            *mp;
OBJECT          ti;
int             wha;
{
        int32   tvid[3];

        if (!getmeshtrivid(tvid, mo, mp, ti))
                return(0);

        getmeshvert(&tv[0], mp, tvid[0], wha);
        getmeshvert(&tv[1], mp, tvid[1], wha);
        getmeshvert(&tv[2], mp, tvid[2], wha);

        return(tv[0].fl & tv[1].fl & tv[2].fl);
}


int32
addmeshvert(mp, vp)             /* find/add a mesh vertex */
register MESH   *mp;
MESHVERT        *vp;
{
        LUENT           *lvp;
        MCVERT          cv;
        register int    i;

        if (!(vp->fl & MT_V))
                return(-1);
                                        /* encode vertex */
        for (i = 0; i < 3; i++) {
                if (vp->v[i] < mp->mcube.cuorg[i])
                        return(-1);
                if (vp->v[i] >= mp->mcube.cuorg[i] + mp->mcube.cusize)
                        return(-1);
                cv.xyz[i] = (uint32)(4294967296. *
                                (vp->v[i] - mp->mcube.cuorg[i]) /
                                mp->mcube.cusize);
        }
        if (vp->fl & MT_N)
                cv.norm = encodedir(vp->n);
        if (vp->fl & MT_UV)
                for (i = 0; i < 2; i++) {
                        if (vp->uv[i] <= mp->uvlim[0][i])
                                return(-1);
                        if (vp->uv[i] >= mp->uvlim[1][i])
                                return(-1);
                        cv.uv[i] = (uint32)(4294967296. *
                                        (vp->uv[i] - mp->uvlim[0][i]) /
                                        (mp->uvlim[1][i] - mp->uvlim[0][i]));
                }
        cv.fl = vp->fl;
        if (mp->lut.tsiz == 0) {
                mp->lut.hashf = cvhash;
                mp->lut.keycmp = cvcmp;
                mp->lut.freek = free;
                if (!lu_init(&mp->lut, 50000))
                        goto nomem;
        }
                                        /* find entry */
        lvp = lu_find(&mp->lut, (char *)&cv);
        if (lvp == NULL)
                goto nomem;
        if (lvp->key == NULL) {
                lvp->key = (char *)malloc(sizeof(MCVERT)+sizeof(int32));
                memcpy((void *)lvp->key, (void *)&cv, sizeof(MCVERT));
        }
        if (lvp->data == NULL) {        /* new vertex */
                register MESHPATCH      *pp;
                if (mp->npatches <= 0) {
                        mp->patch = (MESHPATCH *)calloc(MPATCHBLKSIZ,
                                        sizeof(MESHPATCH));
                        if (mp->patch == NULL)
                                goto nomem;
                        mp->npatches = 1;
                } else if (mp->patch[mp->npatches-1].nverts >= 256) {
                        if (mp->npatches % MPATCHBLKSIZ == 0) {
                                mp->patch = (MESHPATCH *)realloc(
                                                (void *)mp->patch,
                                        (mp->npatches + MPATCHBLKSIZ)*
                                                sizeof(MESHPATCH));
                                memset((void *)(mp->patch + mp->npatches), '\0',
                                        MPATCHBLKSIZ*sizeof(MESHPATCH));
                        }
                        if (mp->npatches++ >= 1L<<22)
                                error(INTERNAL, "too many mesh patches");
                }
                pp = &mp->patch[mp->npatches-1];
                if (pp->xyz == NULL) {
                        pp->xyz = (uint32 (*)[3])calloc(256, 3*sizeof(int32));
                        if (pp->xyz == NULL)
                                goto nomem;
                }
                for (i = 0; i < 3; i++)
                        pp->xyz[pp->nverts][i] = cv.xyz[i];
                if (cv.fl & MT_N) {
                        if (pp->norm == NULL) {
                                pp->norm = (int32 *)calloc(256, sizeof(int32));
                                if (pp->norm == NULL)
                                        goto nomem;
                        }
                        pp->norm[pp->nverts] = cv.norm;
                }
                if (cv.fl & MT_UV) {
                        if (pp->uv == NULL) {
                                pp->uv = (uint32 (*)[2])calloc(256,
                                                2*sizeof(uint32));
                                if (pp->uv == NULL)
                                        goto nomem;
                        }
                        for (i = 0; i < 2; i++)
                                pp->uv[pp->nverts][i] = cv.uv[i];
                }
                pp->nverts++;
                lvp->data = lvp->key + sizeof(MCVERT);
                *(int32 *)lvp->data = (mp->npatches-1) << 8 | (pp->nverts-1);
        }
        return(*(int32 *)lvp->data);
nomem:
        error(SYSTEM, "out of memory in addmeshvert");
        return(-1);
}


OBJECT
addmeshtri(mp, tv, mo)          /* add a new mesh triangle */
MESH            *mp;
MESHVERT        tv[3];
OBJECT          mo;
{
        int32                   vid[3], t;
        int                     pn[3], i;
        register MESHPATCH      *pp;

        if (!(tv[0].fl & tv[1].fl & tv[2].fl & MT_V))
                return(OVOID);
                                /* find/allocate patch vertices */
        for (i = 0; i < 3; i++) {
                if ((vid[i] = addmeshvert(mp, &tv[i])) < 0)
                        return(OVOID);
                pn[i] = vid[i] >> 8;
        }
                                /* normalize material index */
        if (mo != OVOID)
                if ((mo -= mp->mat0) >= mp->nmats)
                        mp->nmats = mo+1;
                else if (mo < 0)
                        error(INTERNAL, "modifier range error in addmeshtri");
                                /* assign triangle */
        if (pn[0] == pn[1] && pn[1] == pn[2]) { /* local case */
                pp = &mp->patch[pn[0]];
                if (pp->tri == NULL) {
                        pp->tri = (struct PTri *)malloc(
                                        512*sizeof(struct PTri));
                        if (pp->tri == NULL)
                                goto nomem;
                }
                if (pp->ntris < 512) {
                        pp->tri[pp->ntris].v1 = vid[0] & 0xff;
                        pp->tri[pp->ntris].v2 = vid[1] & 0xff;
                        pp->tri[pp->ntris].v3 = vid[2] & 0xff;
                        if (pp->ntris == 0)
                                pp->solemat = mo;
                        else if (pp->trimat == NULL && mo != pp->solemat) {
                                pp->trimat = (int16 *)malloc(
                                                512*sizeof(int16));
                                if (pp->trimat == NULL)
                                        goto nomem;
                                for (i = pp->ntris; i--; )
                                        pp->trimat[i] = pp->solemat;
                        }
                        if (pp->trimat != NULL)
                                pp->trimat[pp->ntris] = mo;
                        return(pn[0] << 10 | pp->ntris++);
                }
        }
        if (pn[0] == pn[1]) {
                t = vid[2]; vid[2] = vid[1]; vid[1] = vid[0]; vid[0] = t;
                i = pn[2]; pn[2] = pn[1]; pn[1] = pn[0]; pn[0] = i;
        } else if (pn[0] == pn[2]) {
                t = vid[0]; vid[0] = vid[1]; vid[1] = vid[2]; vid[2] = t;
                i = pn[0]; pn[0] = pn[1]; pn[1] = pn[2]; pn[2] = i;
        }
        if (pn[1] == pn[2]) {                   /* single link */
                pp = &mp->patch[pn[1]];
                if (pp->j1tri == NULL) {
                        pp->j1tri = (struct PJoin1 *)malloc(
                                        256*sizeof(struct PJoin1));
                        if (pp->j1tri == NULL)
                                goto nomem;
                }
                if (pp->nj1tris < 256) {
                        pp->j1tri[pp->nj1tris].v1j = vid[0];
                        pp->j1tri[pp->nj1tris].v2 = vid[1] & 0xff;
                        pp->j1tri[pp->nj1tris].v3 = vid[2] & 0xff;
                        pp->j1tri[pp->nj1tris].mat = mo;
                        return(pn[1] << 10 | 0x200 | pp->nj1tris++);
                }
        }
                                                /* double link */
        pp = &mp->patch[pn[2]];
        if (pp->j2tri == NULL) {
                pp->j2tri = (struct PJoin2 *)malloc(
                                        256*sizeof(struct PJoin2));
                if (pp->j2tri == NULL)
                        goto nomem;
        }
        if (pp->nj2tris >= 256)
                error(INTERNAL, "too many patch triangles in addmeshtri");
        pp->j2tri[pp->nj2tris].v1j = vid[0];
        pp->j2tri[pp->nj2tris].v2j = vid[1];
        pp->j2tri[pp->nj2tris].v3 = vid[2] & 0xff;
        pp->j2tri[pp->nj2tris].mat = mo;
        return(pn[2] << 10 | 0x300 | pp->nj2tris++);
nomem:
        error(SYSTEM, "out of memory in addmeshtri");
        return(OVOID);
}


char *
checkmesh(mp)                           /* validate mesh data */
register MESH   *mp;
{
        static char     embuf[128];
        int             nouvbounds = 1;
        register int    i;
                                        /* basic checks */
        if (mp == NULL)
                return("NULL mesh pointer");
        if (!mp->ldflags)
                return("unassigned mesh");
        if (mp->name == NULL)
                return("missing mesh name");
        if (mp->nref <= 0)
                return("unreferenced mesh");
                                        /* check boundaries */
        if (mp->ldflags & IO_BOUNDS) {
                if (mp->mcube.cusize <= FTINY)
                        return("illegal octree bounds in mesh");
                nouvbounds = (mp->uvlim[1][0] - mp->uvlim[0][0] <= FTINY ||
                                mp->uvlim[1][1] - mp->uvlim[0][1] <= FTINY);
        }
                                        /* check octree */
        if (mp->ldflags & IO_TREE) {
                if (isempty(mp->mcube.cutree))
                        error(WARNING, "empty mesh octree");
        }
                                        /* check scene data */
        if (mp->ldflags & IO_SCENE) {
                if (!(mp->ldflags & IO_BOUNDS))
                        return("unbounded scene in mesh");
                if (mp->mat0 < 0 || mp->mat0+mp->nmats > nobjects)
                        return("bad mesh modifier range");
                for (i = mp->mat0+mp->nmats; i-- > mp->mat0; ) {
                        int     otyp = objptr(i)->otype;
                        if (!ismodifier(otyp)) {
                                sprintf(embuf,
                                        "non-modifier in mesh (%s \"%s\")",
                                        ofun[otyp].funame, objptr(i)->oname);
                                return(embuf);
                        }
                }
                if (mp->npatches <= 0)
                        error(WARNING, "no patches in mesh");
                for (i = 0; i < mp->npatches; i++) {
                        register MESHPATCH      *pp = &mp->patch[i];
                        if (pp->nverts <= 0)
                                error(WARNING, "no vertices in patch");
                        else {
                                if (pp->xyz == NULL)
                                        return("missing patch vertex list");
                                if (nouvbounds && pp->uv != NULL)
                                        return("unreferenced uv coordinates");
                        }
                        if (pp->ntris + pp->nj1tris + pp->nj2tris <= 0)
                                error(WARNING, "no triangles in patch");
                        if (pp->ntris > 0 && pp->tri == NULL)
                                return("missing patch triangle list");
                        if (pp->nj1tris > 0 && pp->j1tri == NULL)
                                return("missing patch joiner triangle list");
                        if (pp->nj2tris > 0 && pp->j2tri == NULL)
                                return("missing patch double-joiner list");
                }
        }
        return(NULL);                   /* seems OK */
}


static void
tallyoctree(ot, ecp, lcp, ocp)  /* tally octree size */
OCTREE  ot;
int     *ecp, *lcp, *ocp;
{
        int     i;

        if (isempty(ot)) {
                (*ecp)++;
                return;
        }
        if (isfull(ot)) {
                OBJECT  oset[MAXSET+1];
                (*lcp)++;
                objset(oset, ot);
                *ocp += oset[0];
                return;
        }
        for (i = 0; i < 8; i++)
                tallyoctree(octkid(ot, i), ecp, lcp, ocp);
}


void
printmeshstats(ms, fp)          /* print out mesh statistics */
MESH    *ms;
FILE    *fp;
{
        int     lfcnt=0, lecnt=0, locnt=0;
        int     vcnt=0, ncnt=0, uvcnt=0;
        int     nscnt=0, uvscnt=0;
        int     tcnt=0, t1cnt=0, t2cnt=0;
        int     i, j;
        
        tallyoctree(ms->mcube.cutree, &lecnt, &lfcnt, &locnt);
        for (i = 0; i < ms->npatches; i++) {
                register MESHPATCH      *pp = &ms->patch[i];
                vcnt += pp->nverts;
                if (pp->norm != NULL) {
                        for (j = pp->nverts; j--; )
                                if (pp->norm[j])
                                        ncnt++;
                        nscnt += pp->nverts;
                }
                if (pp->uv != NULL) {
                        for (j = pp->nverts; j--; )
                                if (pp->uv[j][0])
                                        uvcnt++;
                        uvscnt += pp->nverts;
                }
                tcnt += pp->ntris;
                t1cnt += pp->nj1tris;
                t2cnt += pp->nj2tris;
        }
        fprintf(fp, "Mesh statistics:\n");
        fprintf(fp, "\t%d materials\n", ms->nmats);
        fprintf(fp, "\t%d patches (%.2f MBytes)\n", ms->npatches,
                        (ms->npatches*sizeof(MESHPATCH) +
                        vcnt*3*sizeof(uint32) +
                        nscnt*sizeof(int32) +
                        uvscnt*2*sizeof(uint32) +
                        tcnt*sizeof(struct PTri) +
                        t1cnt*sizeof(struct PJoin1) +
                        t2cnt*sizeof(struct PJoin2))/(1024.*1024.));
        fprintf(fp, "\t%d vertices (%.1f%% w/ normals, %.1f%% w/ uv)\n",
                        vcnt, 100.*ncnt/vcnt, 100.*uvcnt/vcnt);
        fprintf(fp, "\t%d triangles (%.1f%% local, %.1f%% joiner)\n",
                        tcnt+t1cnt+t2cnt,
                        100.*tcnt/(tcnt+t1cnt+t2cnt),
                        100.*t1cnt/(tcnt+t1cnt+t2cnt));
        fprintf(fp,
        "\t%d leaves in octree (%.1f%% empty, %.2f avg. set size)\n",
                        lfcnt+lecnt, 100.*lecnt/(lfcnt+lecnt),
                        (double)locnt/lfcnt);
}


void
freemesh(ms)                    /* free mesh data */
register MESH   *ms;
{
        MESH    mhead;
        MESH    *msp;
        
        if (ms == NULL)
                return;
        if (ms->nref <= 0)
                error(CONSISTENCY, "unreferenced mesh in freemesh");
        ms->nref--;
        if (ms->nref)           /* still in use */
                return;
                                /* else remove from list */
        mhead.next = mlist;
        for (msp = &mhead; msp->next != NULL; msp = msp->next)
                if (msp->next == ms) {
                        msp->next = ms->next;
                        ms->next = NULL;
                        break;
                }
        if (ms->next != NULL)   /* can't be in list anymore */
                error(CONSISTENCY, "unlisted mesh in freemesh");
        mlist = mhead.next;
                                /* free mesh data */
        freestr(ms->name);
        octfree(ms->mcube.cutree);
        lu_done(&ms->lut);
        if (ms->npatches > 0) {
                register MESHPATCH      *pp = ms->patch + ms->npatches;
                while (pp-- > ms->patch) {
                        if (pp->j2tri != NULL)
                                free((void *)pp->j2tri);
                        if (pp->j1tri != NULL)
                                free((void *)pp->j1tri);
                        if (pp->tri != NULL)
                                free((void *)pp->tri);
                        if (pp->uv != NULL)
                                free((void *)pp->uv);
                        if (pp->norm != NULL)
                                free((void *)pp->norm);
                        if (pp->xyz != NULL)
                                free((void *)pp->xyz);
                }
                free((void *)ms->patch);
        }
        if (ms->pseudo != NULL)
                free((void *)ms->pseudo);
        free((void *)ms);
}


void
freemeshinst(o)                 /* free mesh instance */
OBJREC  *o;
{
        if (o->os == NULL)
                return;
        freemesh((*(MESHINST *)o->os).msh);
        free((void *)o->os);
        o->os = NULL;
}
Revision:	2.11
Committed:	Thu Jul 10 03:47:00 2003 UTC (20 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.10:	+5 -3 lines
Log Message:	Fixed serious bug in ranimate where mesh instances were not being freed
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.11	static const char RCSid[] = "$Id: mesh.c,v 2.10 2003/07/10 03:30:11 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Mesh support routines
6			*/
7
8	schorsch	2.9	#include <string.h>
9
10	greg	2.1	#include "standard.h"
11			#include "octree.h"
12			#include "object.h"
13	greg	2.4	#include "otypes.h"
14	greg	2.1	#include "mesh.h"
15
16			/* An encoded mesh vertex */
17			typedef struct {
18			int fl;
19	greg	2.8	uint32 xyz[3];
20			int32 norm;
21			uint32 uv[2];
22	greg	2.1	} MCVERT;
23
24			#define MPATCHBLKSIZ 128 /* patch allocation block size */
25
26			#define IO_LEGAL (IO_BOUNDS\|IO_TREE\|IO_SCENE)
27
28			static MESH mlist = NULL; / list of loaded meshes */
29
30
31			static unsigned long
32			cvhash(cvp) /* hash an encoded vertex */
33			MCVERT *cvp;
34			{
35			unsigned long hval;
36
37			if (!(cvp->fl & MT_V))
38			return(0);
39			hval = cvp->xyz[0] ^ cvp->xyz[1] << 11 ^ cvp->xyz[2] << 22;
40			if (cvp->fl & MT_N)
41			hval ^= cvp->norm;
42			if (cvp->fl & MT_UV)
43			hval ^= cvp->uv[0] ^ cvp->uv[1] << 16;
44			return(hval);
45			}
46
47
48			static int
49			cvcmp(v1, v2) /* compare encoded vertices */
50			register MCVERT v1, v2;
51			{
52			if (v1->fl != v2->fl)
53			return(1);
54			if (v1->xyz[0] != v2->xyz[0])
55			return(1);
56			if (v1->xyz[1] != v2->xyz[1])
57			return(1);
58			if (v1->xyz[2] != v2->xyz[2])
59			return(1);
60			if (v1->fl & MT_N && v1->norm != v2->norm)
61			return(1);
62			if (v1->fl & MT_UV) {
63			if (v1->uv[0] != v2->uv[0])
64			return(1);
65			if (v1->uv[1] != v2->uv[1])
66			return(1);
67			}
68			return(0);
69			}
70
71
72			MESH *
73	greg	2.10	getmesh(mname, flags) /* get new mesh data reference */
74	greg	2.1	char *mname;
75			int flags;
76			{
77			char *pathname;
78			register MESH *ms;
79
80			flags &= IO_LEGAL;
81			for (ms = mlist; ms != NULL; ms = ms->next)
82	greg	2.11	if (!strcmp(mname, ms->name)) {
83			ms->nref++; /* increase reference count */
84	greg	2.10	break;
85	greg	2.11	}
86	greg	2.10	if (ms == NULL) { /* load first time */
87	greg	2.1	ms = (MESH *)calloc(1, sizeof(MESH));
88			if (ms == NULL)
89			error(SYSTEM, "out of memory in getmesh");
90			ms->name = savestr(mname);
91	greg	2.11	ms->nref = 1;
92	greg	2.1	ms->mcube.cutree = EMPTY;
93			ms->next = mlist;
94			mlist = ms;
95			}
96	greg	2.7	if ((pathname = getpath(mname, getrlibpath(), R_OK)) == NULL) {
97	greg	2.1	sprintf(errmsg, "cannot find mesh file \"%s\"", mname);
98			error(USER, errmsg);
99			}
100			flags &= ~ms->ldflags;
101			if (flags)
102			readmesh(ms, pathname, flags);
103			return(ms);
104			}
105
106
107			MESHINST *
108			getmeshinst(o, flags) /* create mesh instance */
109			OBJREC *o;
110			int flags;
111			{
112			register MESHINST *ins;
113
114			flags &= IO_LEGAL;
115			if ((ins = (MESHINST *)o->os) == NULL) {
116			if ((ins = (MESHINST *)malloc(sizeof(MESHINST))) == NULL)
117			error(SYSTEM, "out of memory in getmeshinst");
118			if (o->oargs.nsargs < 1)
119			objerror(o, USER, "bad # of arguments");
120			if (fullxf(&ins->x, o->oargs.nsargs-1,
121			o->oargs.sarg+1) != o->oargs.nsargs-1)
122			objerror(o, USER, "bad transform");
123			if (ins->x.f.sca < 0.0) {
124			ins->x.f.sca = -ins->x.f.sca;
125			ins->x.b.sca = -ins->x.b.sca;
126			}
127			ins->msh = NULL;
128			o->os = (char *)ins;
129			}
130	greg	2.10	if (ins->msh == NULL)
131	greg	2.1	ins->msh = getmesh(o->oargs.sarg[0], flags);
132	greg	2.10	else if ((flags &= ~ins->msh->ldflags))
133			readmesh(ins->msh,
134			getpath(o->oargs.sarg[0], getrlibpath(), R_OK),
135			flags);
136	greg	2.1	return(ins);
137			}
138
139
140			int
141	greg	2.4	getmeshtrivid(tvid, mo, mp, ti) /* get triangle vertex ID's */
142	greg	2.8	int32 tvid[3];
143	greg	2.4	OBJECT *mo;
144			MESH *mp;
145			OBJECT ti;
146	greg	2.1	{
147			int pn = ti >> 10;
148	greg	2.4	MESHPATCH *pp;
149	greg	2.1
150			if (pn >= mp->npatches)
151			return(0);
152	greg	2.4	pp = &mp->patch[pn];
153	greg	2.1	ti &= 0x3ff;
154			if (!(ti & 0x200)) { /* local triangle */
155			struct PTri *tp;
156	greg	2.4	if (ti >= pp->ntris)
157	greg	2.1	return(0);
158	greg	2.4	tp = &pp->tri[ti];
159	greg	2.1	tvid[0] = tvid[1] = tvid[2] = pn << 8;
160			tvid[0] \|= tp->v1;
161			tvid[1] \|= tp->v2;
162			tvid[2] \|= tp->v3;
163	greg	2.4	if (pp->trimat != NULL)
164			*mo = pp->trimat[ti];
165			else
166			*mo = pp->solemat;
167			if (*mo != OVOID)
168			*mo += mp->mat0;
169	greg	2.1	return(1);
170			}
171			ti &= ~0x200;
172			if (!(ti & 0x100)) { /* single link vertex */
173			struct PJoin1 *tp1;
174	greg	2.4	if (ti >= pp->nj1tris)
175	greg	2.1	return(0);
176	greg	2.4	tp1 = &pp->j1tri[ti];
177	greg	2.1	tvid[0] = tp1->v1j;
178			tvid[1] = tvid[2] = pn << 8;
179			tvid[1] \|= tp1->v2;
180			tvid[2] \|= tp1->v3;
181	greg	2.4	if ((*mo = tp1->mat) != OVOID)
182			*mo += mp->mat0;
183	greg	2.1	return(1);
184			}
185			ti &= ~0x100;
186			{ /* double link vertex */
187			struct PJoin2 *tp2;
188	greg	2.4	if (ti >= pp->nj2tris)
189	greg	2.1	return(0);
190	greg	2.4	tp2 = &pp->j2tri[ti];
191	greg	2.1	tvid[0] = tp2->v1j;
192			tvid[1] = tp2->v2j;
193			tvid[2] = pn << 8 \| tp2->v3;
194	greg	2.4	if ((*mo = tp2->mat) != OVOID)
195			*mo += mp->mat0;
196	greg	2.1	}
197			return(1);
198			}
199
200
201			int
202			getmeshvert(vp, mp, vid, what) /* get triangle vertex from ID */
203	greg	2.6	MESHVERT *vp;
204			MESH *mp;
205	greg	2.8	int32 vid;
206	greg	2.6	int what;
207	greg	2.1	{
208			int pn = vid >> 8;
209			MESHPATCH *pp;
210			double vres;
211			register int i;
212
213			vp->fl = 0;
214			if (pn >= mp->npatches)
215			return(0);
216			pp = &mp->patch[pn];
217			vid &= 0xff;
218			if (vid >= pp->nverts)
219			return(0);
220			/* get location */
221			if (what & MT_V) {
222			vres = (1./4294967296.)*mp->mcube.cusize;
223			for (i = 0; i < 3; i++)
224			vp->v[i] = mp->mcube.cuorg[i] +
225			(pp->xyz[vid][i] + .5)*vres;
226			vp->fl \|= MT_V;
227			}
228			/* get normal */
229			if (what & MT_N && pp->norm != NULL && pp->norm[vid]) {
230			decodedir(vp->n, pp->norm[vid]);
231			vp->fl \|= MT_N;
232			}
233			/* get (u,v) */
234			if (what & MT_UV && pp->uv != NULL && pp->uv[vid][0]) {
235			for (i = 0; i < 2; i++)
236	greg	2.2	vp->uv[i] = mp->uvlim[0][i] +
237			(mp->uvlim[1][i] - mp->uvlim[0][i])*
238	greg	2.1	(pp->uv[vid][i] + .5)*(1./4294967296.);
239			vp->fl \|= MT_UV;
240			}
241			return(vp->fl);
242			}
243
244
245	greg	2.4	OBJREC *
246			getmeshpseudo(mp, mo) /* get mesh pseudo object for material */
247			MESH *mp;
248			OBJECT mo;
249			{
250			if (mo < mp->mat0 \|\| mo >= mp->mat0 + mp->nmats)
251			error(INTERNAL, "modifier out of range in getmeshpseudo");
252			if (mp->pseudo == NULL) {
253			register int i;
254			mp->pseudo = (OBJREC *)calloc(mp->nmats, sizeof(OBJREC));
255			if (mp->pseudo == NULL)
256			error(SYSTEM, "out of memory in getmeshpseudo");
257			for (i = mp->nmats; i--; ) {
258			mp->pseudo[i].omod = mp->mat0 + i;
259			mp->pseudo[i].otype = OBJ_FACE;
260			mp->pseudo[i].oname = "M-Tri";
261			}
262			}
263			return(&mp->pseudo[mo - mp->mat0]);
264			}
265
266
267	greg	2.1	int
268	greg	2.4	getmeshtri(tv, mo, mp, ti, wha) /* get triangle vertices */
269	greg	2.1	MESHVERT tv[3];
270	greg	2.4	OBJECT *mo;
271	greg	2.1	MESH *mp;
272			OBJECT ti;
273	greg	2.4	int wha;
274	greg	2.1	{
275	greg	2.8	int32 tvid[3];
276	greg	2.1
277	greg	2.4	if (!getmeshtrivid(tvid, mo, mp, ti))
278	greg	2.1	return(0);
279
280	greg	2.4	getmeshvert(&tv[0], mp, tvid[0], wha);
281			getmeshvert(&tv[1], mp, tvid[1], wha);
282			getmeshvert(&tv[2], mp, tvid[2], wha);
283	greg	2.1
284			return(tv[0].fl & tv[1].fl & tv[2].fl);
285			}
286
287
288	greg	2.8	int32
289	greg	2.1	addmeshvert(mp, vp) /* find/add a mesh vertex */
290			register MESH *mp;
291			MESHVERT *vp;
292			{
293			LUENT *lvp;
294			MCVERT cv;
295			register int i;
296
297			if (!(vp->fl & MT_V))
298			return(-1);
299			/* encode vertex */
300			for (i = 0; i < 3; i++) {
301			if (vp->v[i] < mp->mcube.cuorg[i])
302			return(-1);
303			if (vp->v[i] >= mp->mcube.cuorg[i] + mp->mcube.cusize)
304			return(-1);
305	greg	2.8	cv.xyz[i] = (uint32)(4294967296. *
306	greg	2.1	(vp->v[i] - mp->mcube.cuorg[i]) /
307			mp->mcube.cusize);
308			}
309			if (vp->fl & MT_N)
310			cv.norm = encodedir(vp->n);
311			if (vp->fl & MT_UV)
312			for (i = 0; i < 2; i++) {
313	greg	2.2	if (vp->uv[i] <= mp->uvlim[0][i])
314	greg	2.1	return(-1);
315	greg	2.2	if (vp->uv[i] >= mp->uvlim[1][i])
316	greg	2.1	return(-1);
317	greg	2.8	cv.uv[i] = (uint32)(4294967296. *
318	greg	2.2	(vp->uv[i] - mp->uvlim[0][i]) /
319			(mp->uvlim[1][i] - mp->uvlim[0][i]));
320	greg	2.1	}
321			cv.fl = vp->fl;
322	greg	2.4	if (mp->lut.tsiz == 0) {
323			mp->lut.hashf = cvhash;
324			mp->lut.keycmp = cvcmp;
325			mp->lut.freek = free;
326			if (!lu_init(&mp->lut, 50000))
327	greg	2.1	goto nomem;
328			}
329			/* find entry */
330	greg	2.4	lvp = lu_find(&mp->lut, (char *)&cv);
331	greg	2.1	if (lvp == NULL)
332			goto nomem;
333			if (lvp->key == NULL) {
334	greg	2.8	lvp->key = (char *)malloc(sizeof(MCVERT)+sizeof(int32));
335	schorsch	2.9	memcpy((void )lvp->key, (void )&cv, sizeof(MCVERT));
336	greg	2.1	}
337			if (lvp->data == NULL) { /* new vertex */
338			register MESHPATCH *pp;
339			if (mp->npatches <= 0) {
340			mp->patch = (MESHPATCH *)calloc(MPATCHBLKSIZ,
341			sizeof(MESHPATCH));
342			if (mp->patch == NULL)
343			goto nomem;
344			mp->npatches = 1;
345			} else if (mp->patch[mp->npatches-1].nverts >= 256) {
346			if (mp->npatches % MPATCHBLKSIZ == 0) {
347			mp->patch = (MESHPATCH *)realloc(
348			(void *)mp->patch,
349			(mp->npatches + MPATCHBLKSIZ)*
350			sizeof(MESHPATCH));
351	schorsch	2.9	memset((void *)(mp->patch + mp->npatches), '\0',
352	greg	2.1	MPATCHBLKSIZ*sizeof(MESHPATCH));
353			}
354	greg	2.2	if (mp->npatches++ >= 1L<<22)
355	greg	2.1	error(INTERNAL, "too many mesh patches");
356			}
357			pp = &mp->patch[mp->npatches-1];
358			if (pp->xyz == NULL) {
359	greg	2.8	pp->xyz = (uint32 ()[3])calloc(256, 3sizeof(int32));
360	greg	2.1	if (pp->xyz == NULL)
361			goto nomem;
362			}
363			for (i = 0; i < 3; i++)
364			pp->xyz[pp->nverts][i] = cv.xyz[i];
365			if (cv.fl & MT_N) {
366			if (pp->norm == NULL) {
367	greg	2.8	pp->norm = (int32 *)calloc(256, sizeof(int32));
368	greg	2.1	if (pp->norm == NULL)
369			goto nomem;
370			}
371			pp->norm[pp->nverts] = cv.norm;
372			}
373			if (cv.fl & MT_UV) {
374			if (pp->uv == NULL) {
375	greg	2.8	pp->uv = (uint32 (*)[2])calloc(256,
376			2*sizeof(uint32));
377	greg	2.1	if (pp->uv == NULL)
378			goto nomem;
379			}
380			for (i = 0; i < 2; i++)
381			pp->uv[pp->nverts][i] = cv.uv[i];
382			}
383			pp->nverts++;
384			lvp->data = lvp->key + sizeof(MCVERT);
385	greg	2.8	(int32 )lvp->data = (mp->npatches-1) << 8 \| (pp->nverts-1);
386	greg	2.1	}
387	greg	2.8	return((int32 )lvp->data);
388	greg	2.1	nomem:
389			error(SYSTEM, "out of memory in addmeshvert");
390			return(-1);
391			}
392
393
394			OBJECT
395	greg	2.4	addmeshtri(mp, tv, mo) /* add a new mesh triangle */
396	greg	2.1	MESH *mp;
397			MESHVERT tv[3];
398	greg	2.4	OBJECT mo;
399	greg	2.1	{
400	greg	2.8	int32 vid[3], t;
401	greg	2.1	int pn[3], i;
402			register MESHPATCH *pp;
403
404			if (!(tv[0].fl & tv[1].fl & tv[2].fl & MT_V))
405			return(OVOID);
406			/* find/allocate patch vertices */
407			for (i = 0; i < 3; i++) {
408			if ((vid[i] = addmeshvert(mp, &tv[i])) < 0)
409			return(OVOID);
410			pn[i] = vid[i] >> 8;
411			}
412	greg	2.4	/* normalize material index */
413			if (mo != OVOID)
414			if ((mo -= mp->mat0) >= mp->nmats)
415			mp->nmats = mo+1;
416			else if (mo < 0)
417			error(INTERNAL, "modifier range error in addmeshtri");
418	greg	2.1	/* assign triangle */
419			if (pn[0] == pn[1] && pn[1] == pn[2]) { /* local case */
420			pp = &mp->patch[pn[0]];
421			if (pp->tri == NULL) {
422			pp->tri = (struct PTri *)malloc(
423			512*sizeof(struct PTri));
424			if (pp->tri == NULL)
425			goto nomem;
426			}
427	greg	2.2	if (pp->ntris < 512) {
428			pp->tri[pp->ntris].v1 = vid[0] & 0xff;
429			pp->tri[pp->ntris].v2 = vid[1] & 0xff;
430			pp->tri[pp->ntris].v3 = vid[2] & 0xff;
431	greg	2.4	if (pp->ntris == 0)
432			pp->solemat = mo;
433			else if (pp->trimat == NULL && mo != pp->solemat) {
434	greg	2.8	pp->trimat = (int16 *)malloc(
435			512*sizeof(int16));
436	greg	2.4	if (pp->trimat == NULL)
437			goto nomem;
438			for (i = pp->ntris; i--; )
439			pp->trimat[i] = pp->solemat;
440			}
441			if (pp->trimat != NULL)
442			pp->trimat[pp->ntris] = mo;
443	greg	2.2	return(pn[0] << 10 \| pp->ntris++);
444			}
445	greg	2.1	}
446			if (pn[0] == pn[1]) {
447	greg	2.2	t = vid[2]; vid[2] = vid[1]; vid[1] = vid[0]; vid[0] = t;
448			i = pn[2]; pn[2] = pn[1]; pn[1] = pn[0]; pn[0] = i;
449	greg	2.1	} else if (pn[0] == pn[2]) {
450	greg	2.2	t = vid[0]; vid[0] = vid[1]; vid[1] = vid[2]; vid[2] = t;
451			i = pn[0]; pn[0] = pn[1]; pn[1] = pn[2]; pn[2] = i;
452	greg	2.1	}
453			if (pn[1] == pn[2]) { /* single link */
454			pp = &mp->patch[pn[1]];
455			if (pp->j1tri == NULL) {
456			pp->j1tri = (struct PJoin1 *)malloc(
457			256*sizeof(struct PJoin1));
458			if (pp->j1tri == NULL)
459			goto nomem;
460			}
461	greg	2.2	if (pp->nj1tris < 256) {
462			pp->j1tri[pp->nj1tris].v1j = vid[0];
463			pp->j1tri[pp->nj1tris].v2 = vid[1] & 0xff;
464			pp->j1tri[pp->nj1tris].v3 = vid[2] & 0xff;
465	greg	2.4	pp->j1tri[pp->nj1tris].mat = mo;
466	greg	2.2	return(pn[1] << 10 \| 0x200 \| pp->nj1tris++);
467			}
468	greg	2.1	}
469			/* double link */
470			pp = &mp->patch[pn[2]];
471			if (pp->j2tri == NULL) {
472			pp->j2tri = (struct PJoin2 *)malloc(
473			256*sizeof(struct PJoin2));
474			if (pp->j2tri == NULL)
475			goto nomem;
476			}
477			if (pp->nj2tris >= 256)
478	greg	2.2	error(INTERNAL, "too many patch triangles in addmeshtri");
479			pp->j2tri[pp->nj2tris].v1j = vid[0];
480			pp->j2tri[pp->nj2tris].v2j = vid[1];
481	greg	2.1	pp->j2tri[pp->nj2tris].v3 = vid[2] & 0xff;
482	greg	2.4	pp->j2tri[pp->nj2tris].mat = mo;
483	greg	2.1	return(pn[2] << 10 \| 0x300 \| pp->nj2tris++);
484			nomem:
485			error(SYSTEM, "out of memory in addmeshtri");
486			return(OVOID);
487			}
488
489
490	greg	2.4	char *
491			checkmesh(mp) /* validate mesh data */
492			register MESH *mp;
493			{
494			static char embuf[128];
495			int nouvbounds = 1;
496			register int i;
497			/* basic checks */
498			if (mp == NULL)
499			return("NULL mesh pointer");
500			if (!mp->ldflags)
501			return("unassigned mesh");
502			if (mp->name == NULL)
503			return("missing mesh name");
504			if (mp->nref <= 0)
505			return("unreferenced mesh");
506			/* check boundaries */
507			if (mp->ldflags & IO_BOUNDS) {
508			if (mp->mcube.cusize <= FTINY)
509			return("illegal octree bounds in mesh");
510	greg	2.5	nouvbounds = (mp->uvlim[1][0] - mp->uvlim[0][0] <= FTINY \|\|
511			mp->uvlim[1][1] - mp->uvlim[0][1] <= FTINY);
512	greg	2.4	}
513			/* check octree */
514			if (mp->ldflags & IO_TREE) {
515			if (isempty(mp->mcube.cutree))
516			error(WARNING, "empty mesh octree");
517			}
518			/* check scene data */
519			if (mp->ldflags & IO_SCENE) {
520			if (!(mp->ldflags & IO_BOUNDS))
521			return("unbounded scene in mesh");
522			if (mp->mat0 < 0 \|\| mp->mat0+mp->nmats > nobjects)
523			return("bad mesh modifier range");
524			for (i = mp->mat0+mp->nmats; i-- > mp->mat0; ) {
525			int otyp = objptr(i)->otype;
526			if (!ismodifier(otyp)) {
527			sprintf(embuf,
528			"non-modifier in mesh (%s \"%s\")",
529			ofun[otyp].funame, objptr(i)->oname);
530			return(embuf);
531			}
532			}
533			if (mp->npatches <= 0)
534			error(WARNING, "no patches in mesh");
535			for (i = 0; i < mp->npatches; i++) {
536			register MESHPATCH *pp = &mp->patch[i];
537			if (pp->nverts <= 0)
538			error(WARNING, "no vertices in patch");
539			else {
540			if (pp->xyz == NULL)
541			return("missing patch vertex list");
542			if (nouvbounds && pp->uv != NULL)
543			return("unreferenced uv coordinates");
544			}
545			if (pp->ntris + pp->nj1tris + pp->nj2tris <= 0)
546			error(WARNING, "no triangles in patch");
547			if (pp->ntris > 0 && pp->tri == NULL)
548			return("missing patch triangle list");
549			if (pp->nj1tris > 0 && pp->j1tri == NULL)
550			return("missing patch joiner triangle list");
551			if (pp->nj2tris > 0 && pp->j2tri == NULL)
552			return("missing patch double-joiner list");
553			}
554			}
555			return(NULL); /* seems OK */
556			}
557
558
559	greg	2.1	static void
560			tallyoctree(ot, ecp, lcp, ocp) /* tally octree size */
561			OCTREE ot;
562			int ecp, lcp, *ocp;
563			{
564			int i;
565
566			if (isempty(ot)) {
567			(*ecp)++;
568			return;
569			}
570			if (isfull(ot)) {
571			OBJECT oset[MAXSET+1];
572			(*lcp)++;
573			objset(oset, ot);
574			*ocp += oset[0];
575			return;
576			}
577			for (i = 0; i < 8; i++)
578			tallyoctree(octkid(ot, i), ecp, lcp, ocp);
579			}
580
581
582			void
583			printmeshstats(ms, fp) /* print out mesh statistics */
584			MESH *ms;
585			FILE *fp;
586			{
587			int lfcnt=0, lecnt=0, locnt=0;
588			int vcnt=0, ncnt=0, uvcnt=0;
589			int nscnt=0, uvscnt=0;
590			int tcnt=0, t1cnt=0, t2cnt=0;
591			int i, j;
592
593			tallyoctree(ms->mcube.cutree, &lecnt, &lfcnt, &locnt);
594			for (i = 0; i < ms->npatches; i++) {
595			register MESHPATCH *pp = &ms->patch[i];
596			vcnt += pp->nverts;
597			if (pp->norm != NULL) {
598			for (j = pp->nverts; j--; )
599			if (pp->norm[j])
600			ncnt++;
601			nscnt += pp->nverts;
602			}
603			if (pp->uv != NULL) {
604			for (j = pp->nverts; j--; )
605			if (pp->uv[j][0])
606			uvcnt++;
607			uvscnt += pp->nverts;
608			}
609			tcnt += pp->ntris;
610			t1cnt += pp->nj1tris;
611			t2cnt += pp->nj2tris;
612			}
613			fprintf(fp, "Mesh statistics:\n");
614	greg	2.4	fprintf(fp, "\t%d materials\n", ms->nmats);
615	greg	2.1	fprintf(fp, "\t%d patches (%.2f MBytes)\n", ms->npatches,
616			(ms->npatches*sizeof(MESHPATCH) +
617	greg	2.8	vcnt3sizeof(uint32) +
618			nscnt*sizeof(int32) +
619			uvscnt2sizeof(uint32) +
620	greg	2.1	tcnt*sizeof(struct PTri) +
621			t1cnt*sizeof(struct PJoin1) +
622			t2cntsizeof(struct PJoin2))/(1024.1024.));
623			fprintf(fp, "\t%d vertices (%.1f%% w/ normals, %.1f%% w/ uv)\n",
624			vcnt, 100.ncnt/vcnt, 100.uvcnt/vcnt);
625			fprintf(fp, "\t%d triangles (%.1f%% local, %.1f%% joiner)\n",
626			tcnt+t1cnt+t2cnt,
627			100.*tcnt/(tcnt+t1cnt+t2cnt),
628			100.*t1cnt/(tcnt+t1cnt+t2cnt));
629			fprintf(fp,
630			"\t%d leaves in octree (%.1f%% empty, %.2f avg. set size)\n",
631			lfcnt+lecnt, 100.*lecnt/(lfcnt+lecnt),
632			(double)locnt/lfcnt);
633			}
634
635
636			void
637			freemesh(ms) /* free mesh data */
638	greg	2.4	register MESH *ms;
639	greg	2.1	{
640			MESH mhead;
641			MESH *msp;
642
643			if (ms == NULL)
644			return;
645			if (ms->nref <= 0)
646			error(CONSISTENCY, "unreferenced mesh in freemesh");
647			ms->nref--;
648			if (ms->nref) /* still in use */
649			return;
650			/* else remove from list */
651			mhead.next = mlist;
652			for (msp = &mhead; msp->next != NULL; msp = msp->next)
653			if (msp->next == ms) {
654			msp->next = ms->next;
655			ms->next = NULL;
656			break;
657			}
658			if (ms->next != NULL) /* can't be in list anymore */
659			error(CONSISTENCY, "unlisted mesh in freemesh");
660			mlist = mhead.next;
661			/* free mesh data */
662			freestr(ms->name);
663			octfree(ms->mcube.cutree);
664	greg	2.4	lu_done(&ms->lut);
665	greg	2.1	if (ms->npatches > 0) {
666			register MESHPATCH *pp = ms->patch + ms->npatches;
667			while (pp-- > ms->patch) {
668			if (pp->j2tri != NULL)
669			free((void *)pp->j2tri);
670			if (pp->j1tri != NULL)
671			free((void *)pp->j1tri);
672			if (pp->tri != NULL)
673			free((void *)pp->tri);
674			if (pp->uv != NULL)
675			free((void *)pp->uv);
676			if (pp->norm != NULL)
677			free((void *)pp->norm);
678			if (pp->xyz != NULL)
679			free((void *)pp->xyz);
680			}
681			free((void *)ms->patch);
682			}
683	greg	2.4	if (ms->pseudo != NULL)
684			free((void *)ms->pseudo);
685	greg	2.1	free((void *)ms);
686			}
687
688
689			void
690			freemeshinst(o) /* free mesh instance */
691			OBJREC *o;
692			{
693			if (o->os == NULL)
694			return;
695			freemesh(((MESHINST )o->os).msh);
696			free((void *)o->os);
697			o->os = NULL;
698			}