| 21 |
|
|
| 22 |
|
static MAT4 m4tmp; /* for efficiency */ |
| 23 |
|
|
| 24 |
< |
int xf_argc; /* total # transform args. */ |
| 25 |
< |
char **xf_argv; /* transform arguments */ |
| 26 |
< |
XF_SPEC *xf_context; /* current context */ |
| 24 |
> |
XF_SPEC *xf_context; /* current context */ |
| 25 |
> |
char **xf_argend; /* end of transform argument list */ |
| 26 |
> |
static char **xf_argbeg; /* beginning of transform argument list */ |
| 27 |
|
|
| 28 |
< |
static int xf_maxarg; /* # allocated arguments */ |
| 28 |
> |
static XF_SPEC *new_xf(); |
| 29 |
> |
static long comp_xfid(); |
| 30 |
> |
static int put_oname(); |
| 31 |
|
|
| 32 |
|
|
| 33 |
|
int |
| 35 |
|
int ac; |
| 36 |
|
char **av; |
| 37 |
|
{ |
| 36 |
– |
register int i; |
| 38 |
|
register XF_SPEC *spec; |
| 39 |
< |
XF thisxf; |
| 39 |
> |
register int n; |
| 40 |
> |
int rv; |
| 41 |
|
|
| 42 |
< |
if (ac == 1) { /* pop top transform */ |
| 42 |
> |
if (ac == 1) { /* something with existing transform */ |
| 43 |
|
if ((spec = xf_context) == NULL) |
| 44 |
|
return(MG_OK); /* should be error? */ |
| 45 |
< |
while (xf_argc > spec->xav0) |
| 46 |
< |
free((MEM_PTR)xf_argv[--xf_argc]); |
| 47 |
< |
xf_argv[xf_argc] = NULL; |
| 48 |
< |
xf_context = spec->prev; |
| 49 |
< |
free((MEM_PTR)spec); |
| 50 |
< |
return(MG_OK); |
| 45 |
> |
n = -1; |
| 46 |
> |
if (spec->xarr != NULL) { /* check for iteration */ |
| 47 |
> |
register struct xf_array *ap = spec->xarr; |
| 48 |
> |
|
| 49 |
> |
(void)put_oname((struct xf_array *)NULL); |
| 50 |
> |
n = ap->ndim; |
| 51 |
> |
while (n--) { |
| 52 |
> |
if (++ap->aarg[n].i < ap->aarg[n].n) |
| 53 |
> |
break; |
| 54 |
> |
(void)strcpy(ap->aarg[n].arg, "0"); |
| 55 |
> |
ap->aarg[n].i = 0; |
| 56 |
> |
} |
| 57 |
> |
if (n >= 0) { |
| 58 |
> |
if ((rv = mg_fgoto(&ap->spos)) != MG_OK) |
| 59 |
> |
return(rv); |
| 60 |
> |
sprintf(ap->aarg[n].arg, "%d", ap->aarg[n].i); |
| 61 |
> |
(void)put_oname(ap); |
| 62 |
> |
} else |
| 63 |
> |
free((MEM_PTR)ap); |
| 64 |
> |
} |
| 65 |
> |
if (n < 0) { /* pop transform */ |
| 66 |
> |
xf_context = spec->prev; |
| 67 |
> |
free((MEM_PTR)spec); |
| 68 |
> |
return(MG_OK); |
| 69 |
> |
} |
| 70 |
> |
} else { /* else allocate transform */ |
| 71 |
> |
if ((spec = new_xf(ac-1, av+1)) == NULL) |
| 72 |
> |
return(MG_EMEM); |
| 73 |
> |
spec->prev = xf_context; /* push onto stack */ |
| 74 |
> |
xf_context = spec; |
| 75 |
|
} |
| 76 |
|
/* translate new specification */ |
| 77 |
< |
if (xf(&thisxf, ac-1, av+1) != ac-1) |
| 77 |
> |
n = xf_ac(spec); |
| 78 |
> |
if (spec->prev != NULL) /* incremental comp. is more eff. */ |
| 79 |
> |
n -= xf_ac(spec->prev); |
| 80 |
> |
if (xf(&spec->xf, n, xf_av(spec)) != n) |
| 81 |
|
return(MG_ETYPE); |
| 82 |
< |
/* allocate space for new transform */ |
| 83 |
< |
spec = (XF_SPEC *)malloc(sizeof(XF_SPEC)); |
| 82 |
> |
/* check for vertex reversal */ |
| 83 |
> |
if ((spec->rev = (spec->xf.sca < 0.))) |
| 84 |
> |
spec->xf.sca = -spec->xf.sca; |
| 85 |
> |
/* compute total transformation */ |
| 86 |
> |
if (spec->prev != NULL) { |
| 87 |
> |
multmat4(spec->xf.xfm, spec->xf.xfm, spec->prev->xf.xfm); |
| 88 |
> |
spec->xf.sca *= spec->prev->xf.sca; |
| 89 |
> |
spec->rev ^= spec->prev->rev; |
| 90 |
> |
} |
| 91 |
> |
spec->xid = comp_xfid(spec->xf.xfm); /* compute unique ID */ |
| 92 |
> |
return(MG_OK); |
| 93 |
> |
} |
| 94 |
> |
|
| 95 |
> |
|
| 96 |
> |
static XF_SPEC * |
| 97 |
> |
new_xf(ac, av) /* allocate new transform structure */ |
| 98 |
> |
int ac; |
| 99 |
> |
char **av; |
| 100 |
> |
{ |
| 101 |
> |
register XF_SPEC *spec; |
| 102 |
> |
register int i; |
| 103 |
> |
char *cp; |
| 104 |
> |
int n, ndim; |
| 105 |
> |
|
| 106 |
> |
ndim = 0; |
| 107 |
> |
n = 0; /* compute space req'd by arguments */ |
| 108 |
> |
for (i = 0; i < ac; i++) |
| 109 |
> |
if (!strcmp(av[i], "-a")) { |
| 110 |
> |
ndim++; |
| 111 |
> |
i++; |
| 112 |
> |
} else |
| 113 |
> |
n += strlen(av[i]) + 1; |
| 114 |
> |
if (ndim > XF_MAXDIM) |
| 115 |
> |
return(NULL); |
| 116 |
> |
spec = (XF_SPEC *)malloc(sizeof(XF_SPEC) + n); |
| 117 |
|
if (spec == NULL) |
| 118 |
< |
return(MG_EMEM); |
| 119 |
< |
spec->xav0 = xf_argc; |
| 120 |
< |
spec->xac = ac-1; |
| 118 |
> |
return(NULL); |
| 119 |
> |
if (ndim) { |
| 120 |
> |
spec->xarr = (struct xf_array *)malloc(sizeof(struct xf_array)); |
| 121 |
> |
if (spec->xarr == NULL) |
| 122 |
> |
return(NULL); |
| 123 |
> |
mg_fgetpos(&spec->xarr->spos); |
| 124 |
> |
spec->xarr->ndim = 0; /* incremented below */ |
| 125 |
> |
} else |
| 126 |
> |
spec->xarr = NULL; |
| 127 |
> |
spec->xac = ac + xf_argc; |
| 128 |
|
/* and store new xf arguments */ |
| 129 |
< |
if (xf_argc+ac > xf_maxarg) { |
| 130 |
< |
if (!xf_maxarg) |
| 131 |
< |
xf_argv = (char **)malloc( |
| 132 |
< |
(xf_maxarg=ac)*sizeof(char *)); |
| 133 |
< |
else |
| 134 |
< |
xf_argv = (char **)realloc((MEM_PTR)xf_argv, |
| 135 |
< |
(xf_maxarg+=ac)*sizeof(char *)); |
| 136 |
< |
if (xf_argv == NULL) |
| 137 |
< |
return(MG_EMEM); |
| 129 |
> |
if (xf_argbeg == NULL || xf_av(spec) < xf_argbeg) { |
| 130 |
> |
register char **newav = |
| 131 |
> |
(char **)malloc((spec->xac+1)*sizeof(char *)); |
| 132 |
> |
if (newav == NULL) |
| 133 |
> |
return(NULL); |
| 134 |
> |
for (i = xf_argc; i-- > 0; ) |
| 135 |
> |
newav[ac+i] = xf_argend[i-xf_context->xac]; |
| 136 |
> |
*(xf_argend = newav + spec->xac) = NULL; |
| 137 |
> |
if (xf_argbeg != NULL) |
| 138 |
> |
free((MEM_PTR)xf_argbeg); |
| 139 |
> |
xf_argbeg = newav; |
| 140 |
|
} |
| 141 |
< |
for (i = 0; i < ac-1; i++) { |
| 142 |
< |
xf_argv[xf_argc] = (char *)malloc(strlen(av[i+1])+1); |
| 143 |
< |
if (xf_argv[xf_argc] == NULL) |
| 144 |
< |
return(MG_EMEM); |
| 145 |
< |
strcpy(xf_argv[xf_argc++], av[i+1]); |
| 141 |
> |
cp = (char *)(spec + 1); /* use memory allocated above */ |
| 142 |
> |
for (i = 0; i < ac; i++) |
| 143 |
> |
if (!strcmp(av[i], "-a")) { |
| 144 |
> |
xf_av(spec)[i++] = "-i"; |
| 145 |
> |
xf_av(spec)[i] = strcpy( |
| 146 |
> |
spec->xarr->aarg[spec->xarr->ndim].arg, |
| 147 |
> |
"0"); |
| 148 |
> |
spec->xarr->aarg[spec->xarr->ndim].i = 0; |
| 149 |
> |
spec->xarr->aarg[spec->xarr->ndim++].n = atoi(av[i]); |
| 150 |
> |
} else { |
| 151 |
> |
xf_av(spec)[i] = strcpy(cp, av[i]); |
| 152 |
> |
cp += strlen(av[i]) + 1; |
| 153 |
> |
} |
| 154 |
> |
if (spec->xarr != NULL) |
| 155 |
> |
(void)put_oname(spec->xarr); |
| 156 |
> |
return(spec); |
| 157 |
> |
} |
| 158 |
> |
|
| 159 |
> |
|
| 160 |
> |
static int |
| 161 |
> |
put_oname(ap) /* put out name for this instance */ |
| 162 |
> |
register struct xf_array *ap; |
| 163 |
> |
{ |
| 164 |
> |
static char oname[10*XF_MAXDIM]; |
| 165 |
> |
static char *oav[3] = {mg_ename[MG_E_OBJECT], oname}; |
| 166 |
> |
register int i; |
| 167 |
> |
register char *cp1, *cp2; |
| 168 |
> |
|
| 169 |
> |
if (ap == NULL) |
| 170 |
> |
return(mg_handle(MG_E_OBJECT, 1, oav)); |
| 171 |
> |
cp1 = oname; |
| 172 |
> |
*cp1 = 'a'; |
| 173 |
> |
for (i = 0; i < ap->ndim; i++) { |
| 174 |
> |
for (cp2 = ap->aarg[i].arg; *cp2; ) |
| 175 |
> |
*++cp1 = *cp2++; |
| 176 |
> |
*++cp1 = '.'; |
| 177 |
|
} |
| 178 |
< |
xf_argv[xf_argc] = NULL; |
| 179 |
< |
/* compute total transformation */ |
| 78 |
< |
if (xf_context != NULL) { |
| 79 |
< |
multmat4(spec->xf.xfm, xf_context->xf.xfm, thisxf.xfm); |
| 80 |
< |
spec->xf.sca = xf_context->xf.sca * thisxf.sca; |
| 81 |
< |
} else |
| 82 |
< |
spec->xf = thisxf; |
| 83 |
< |
spec->prev = xf_context; /* push new transform onto stack */ |
| 84 |
< |
xf_context = spec; |
| 85 |
< |
return(MG_OK); |
| 178 |
> |
*cp1 = '\0'; |
| 179 |
> |
return(mg_handle(MG_E_OBJECT, 2, oav)); |
| 180 |
|
} |
| 181 |
|
|
| 182 |
|
|
| 183 |
+ |
static long |
| 184 |
+ |
comp_xfid(xfm) /* compute unique ID from matrix */ |
| 185 |
+ |
register MAT4 xfm; |
| 186 |
+ |
{ |
| 187 |
+ |
static char shifttab[64] = { 15, 5, 11, 5, 6, 3, |
| 188 |
+ |
9, 15, 13, 2, 13, 5, 2, 12, 14, 11, |
| 189 |
+ |
11, 12, 12, 3, 2, 11, 8, 12, 1, 12, |
| 190 |
+ |
5, 4, 15, 9, 14, 5, 13, 14, 2, 10, |
| 191 |
+ |
10, 14, 12, 3, 5, 5, 14, 6, 12, 11, |
| 192 |
+ |
13, 9, 12, 8, 1, 6, 5, 12, 7, 13, |
| 193 |
+ |
15, 8, 9, 2, 6, 11, 9, 11 }; |
| 194 |
+ |
register int i; |
| 195 |
+ |
register long xid; |
| 196 |
+ |
|
| 197 |
+ |
xid = 0; /* compute unique transform id */ |
| 198 |
+ |
for (i = 0; i < sizeof(MAT4)/sizeof(unsigned short); i++) |
| 199 |
+ |
xid ^= (long)(((unsigned short *)xfm)[i]) << shifttab[i&63]; |
| 200 |
+ |
return(xid); |
| 201 |
+ |
} |
| 202 |
+ |
|
| 203 |
+ |
|
| 204 |
|
void |
| 205 |
|
xf_clear() /* clear transform stack */ |
| 206 |
|
{ |
| 207 |
|
register XF_SPEC *spec; |
| 208 |
|
|
| 209 |
< |
while (xf_argc) |
| 210 |
< |
free((MEM_PTR)xf_argv[--xf_argc]); |
| 211 |
< |
if (xf_maxarg) { |
| 97 |
< |
free((MEM_PTR)xf_argv); |
| 98 |
< |
xf_argv = NULL; |
| 99 |
< |
xf_maxarg = 0; |
| 209 |
> |
if (xf_argbeg != NULL) { |
| 210 |
> |
free((MEM_PTR)xf_argbeg); |
| 211 |
> |
xf_argbeg = xf_argend = NULL; |
| 212 |
|
} |
| 213 |
|
while ((spec = xf_context) != NULL) { |
| 214 |
|
xf_context = spec->prev; |
| 215 |
+ |
if (spec->xarr != NULL) |
| 216 |
+ |
free((MEM_PTR)spec->xarr); |
| 217 |
|
free((MEM_PTR)spec); |
| 218 |
|
} |
| 219 |
|
} |
