| 599 |
|
return(sc); |
| 600 |
|
} |
| 601 |
|
|
| 602 |
+ |
/* Add a vertex to a scene */ |
| 603 |
+ |
int |
| 604 |
+ |
addVertex(Scene *sc, double x, double y, double z) |
| 605 |
+ |
{ |
| 606 |
+ |
sc->vert = chunk_alloc(Vertex, sc->vert, sc->nverts); |
| 607 |
+ |
sc->vert[sc->nverts].p[0] = x; |
| 608 |
+ |
sc->vert[sc->nverts].p[1] = y; |
| 609 |
+ |
sc->vert[sc->nverts].p[2] = z; |
| 610 |
+ |
sc->vert[sc->nverts].vflist = NULL; |
| 611 |
+ |
return(sc->nverts++); |
| 612 |
+ |
} |
| 613 |
+ |
|
| 614 |
+ |
/* Add a texture coordinate to a scene */ |
| 615 |
+ |
int |
| 616 |
+ |
addTexture(Scene *sc, double u, double v) |
| 617 |
+ |
{ |
| 618 |
+ |
sc->tex = chunk_alloc(TexCoord, sc->tex, sc->ntex); |
| 619 |
+ |
sc->tex[sc->ntex].u = u; |
| 620 |
+ |
sc->tex[sc->ntex].v = v; |
| 621 |
+ |
return(sc->ntex++); |
| 622 |
+ |
} |
| 623 |
+ |
|
| 624 |
+ |
/* Add a surface normal to a scene */ |
| 625 |
+ |
int |
| 626 |
+ |
addNormal(Scene *sc, double xn, double yn, double zn) |
| 627 |
+ |
{ |
| 628 |
+ |
FVECT nrm; |
| 629 |
+ |
|
| 630 |
+ |
nrm[0] = xn; nrm[1] = yn; nrm[2] = zn; |
| 631 |
+ |
if (normalize(nrm) == .0) |
| 632 |
+ |
return(-1); |
| 633 |
+ |
sc->norm = chunk_alloc(Normal, sc->norm, sc->nnorms); |
| 634 |
+ |
VCOPY(sc->norm[sc->nnorms], nrm); |
| 635 |
+ |
return(sc->nnorms++); |
| 636 |
+ |
} |
| 637 |
+ |
|
| 638 |
+ |
/* Set current (last) group */ |
| 639 |
+ |
void |
| 640 |
+ |
setGroup(Scene *sc, const char *nm) |
| 641 |
+ |
{ |
| 642 |
+ |
sc->lastgrp = findName(nm, (const char **)sc->grpname, sc->ngrps); |
| 643 |
+ |
if (sc->lastgrp >= 0) |
| 644 |
+ |
return; |
| 645 |
+ |
sc->grpname = chunk_alloc(char *, sc->grpname, sc->ngrps); |
| 646 |
+ |
sc->grpname[sc->lastgrp=sc->ngrps++] = savqstr((char *)nm); |
| 647 |
+ |
} |
| 648 |
+ |
|
| 649 |
+ |
/* Set current (last) material */ |
| 650 |
+ |
void |
| 651 |
+ |
setMaterial(Scene *sc, const char *nm) |
| 652 |
+ |
{ |
| 653 |
+ |
sc->lastmat = findName(nm, (const char **)sc->matname, sc->nmats); |
| 654 |
+ |
if (sc->lastmat >= 0) |
| 655 |
+ |
return; |
| 656 |
+ |
sc->matname = chunk_alloc(char *, sc->matname, sc->nmats); |
| 657 |
+ |
sc->matname[sc->lastmat=sc->nmats++] = savqstr((char *)nm); |
| 658 |
+ |
} |
| 659 |
+ |
|
| 660 |
+ |
/* Add new face to a scene */ |
| 661 |
+ |
Face * |
| 662 |
+ |
addFace(Scene *sc, VNDX vid[], int nv) |
| 663 |
+ |
{ |
| 664 |
+ |
Face *f; |
| 665 |
+ |
int i; |
| 666 |
+ |
|
| 667 |
+ |
if (nv < 3) |
| 668 |
+ |
return(NULL); |
| 669 |
+ |
f = (Face *)emalloc(sizeof(Face)+sizeof(VertEnt)*(nv-3)); |
| 670 |
+ |
f->flags = 0; |
| 671 |
+ |
f->nv = nv; |
| 672 |
+ |
f->grp = sc->lastgrp; |
| 673 |
+ |
f->mat = sc->lastmat; |
| 674 |
+ |
for (i = 0; i < nv; i++) { /* add each vertex */ |
| 675 |
+ |
int j; |
| 676 |
+ |
f->v[i].vid = vid[i][0]; |
| 677 |
+ |
f->v[i].tid = vid[i][1]; |
| 678 |
+ |
f->v[i].nid = vid[i][2]; |
| 679 |
+ |
f->v[i].fnext = NULL; |
| 680 |
+ |
for (j = i; j-- > 0; ) |
| 681 |
+ |
if (f->v[j].vid == vid[i][0]) |
| 682 |
+ |
break; |
| 683 |
+ |
if (j < 0) { /* first occurrence? */ |
| 684 |
+ |
f->v[i].fnext = sc->vert[vid[i][0]].vflist; |
| 685 |
+ |
sc->vert[vid[i][0]].vflist = f; |
| 686 |
+ |
} else if (nv == 3) /* degenerate triangle? */ |
| 687 |
+ |
f->flags |= FACE_DEGENERATE; |
| 688 |
+ |
} |
| 689 |
+ |
f->next = sc->flist; /* push onto face list */ |
| 690 |
+ |
sc->flist = f; |
| 691 |
+ |
sc->nfaces++; |
| 692 |
+ |
/* check face area */ |
| 693 |
+ |
if (!(f->flags & FACE_DEGENERATE) && faceArea(sc, f, NULL) <= FTINY) |
| 694 |
+ |
f->flags |= FACE_DEGENERATE; |
| 695 |
+ |
return(f); |
| 696 |
+ |
} |
| 697 |
+ |
|
| 698 |
|
/* Duplicate a scene */ |
| 699 |
|
Scene * |
| 700 |
|
dupScene(const Scene *osc) |
