8 |
|
*/ |
9 |
|
|
10 |
|
#include <stdlib.h> |
11 |
+ |
#include <ctype.h> |
12 |
|
#include "rtio.h" |
13 |
|
#include "rtmath.h" |
14 |
|
#include "rterror.h" |
663 |
|
} |
664 |
|
return(sc); |
665 |
|
} |
666 |
+ |
|
667 |
+ |
/* Transform entire scene */ |
668 |
+ |
#define MAXAC 100 |
669 |
+ |
int |
670 |
+ |
xfmScene(Scene *sc, const char *xfm) |
671 |
+ |
{ |
672 |
+ |
char *xav[MAXAC+1]; |
673 |
+ |
int xac, i; |
674 |
+ |
XF myxf; |
675 |
+ |
FVECT vec; |
676 |
+ |
|
677 |
+ |
if ((sc == NULL) | (xfm == NULL)) |
678 |
+ |
return(0); |
679 |
+ |
while (isspace(*xfm)) /* find first word */ |
680 |
+ |
xfm++; |
681 |
+ |
if (!*xfm) |
682 |
+ |
return(0); |
683 |
+ |
/* break into words for xf() */ |
684 |
+ |
xav[0] = strcpy((char *)malloc(strlen(xfm)+1), xfm); |
685 |
+ |
xac = 1; i = 0; |
686 |
+ |
for ( ; ; ) { |
687 |
+ |
while (!isspace(xfm[++i])) |
688 |
+ |
if (!xfm[i]) |
689 |
+ |
break; |
690 |
+ |
while (isspace(xfm[i])) |
691 |
+ |
xav[0][i++] = '\0'; |
692 |
+ |
if (!xfm[i]) |
693 |
+ |
break; |
694 |
+ |
if (xac >= MAXAC-1) |
695 |
+ |
goto bad_xform; |
696 |
+ |
xav[xac++] = xav[0] + i; |
697 |
+ |
} |
698 |
+ |
xav[xac] = NULL; |
699 |
+ |
if (xf(&myxf, xac, xav) < xac) |
700 |
+ |
goto bad_xform; |
701 |
+ |
free(xav[0]); |
702 |
+ |
/* transform vertices */ |
703 |
+ |
for (i = 0; i < sc->nverts; i++) { |
704 |
+ |
VCOPY(vec, sc->vert[i].p); |
705 |
+ |
multp3(vec, vec, myxf.xfm); |
706 |
+ |
VCOPY(sc->vert[i].p, vec); |
707 |
+ |
} |
708 |
+ |
/* transform normals */ |
709 |
+ |
for (i = 0; i < sc->nnorms; i++) { |
710 |
+ |
VCOPY(vec, sc->norm[i]); |
711 |
+ |
multv3(vec, vec, myxf.xfm); |
712 |
+ |
vec[0] /= myxf.sca; vec[1] /= myxf.sca; vec[2] /= myxf.sca; |
713 |
+ |
VCOPY(sc->norm[i], vec); |
714 |
+ |
} |
715 |
+ |
return xac; /* finito */ |
716 |
+ |
bad_xform: |
717 |
+ |
free(xav[0]); |
718 |
+ |
return(0); |
719 |
+ |
} |
720 |
+ |
#undef MAXAC |
721 |
|
|
722 |
|
/* Free a scene */ |
723 |
|
void |