17 |
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#include "func.h" |
18 |
|
|
19 |
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/* |
20 |
< |
* A stored mixture is specified: |
20 |
> |
* A stored mixture is specified: |
21 |
|
* |
22 |
|
* modifier mixdata name |
23 |
|
* 6+ foremod backmod func dfname vfname v0 v1 .. xf |
24 |
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* 0 |
25 |
|
* n A1 A2 .. |
26 |
|
* |
27 |
+ |
* A picture mixture is specified as: |
28 |
+ |
* |
29 |
+ |
* modifier mixpict name |
30 |
+ |
* 7+ foremod backmod func pfname vfname vx vy xf |
31 |
+ |
* 0 |
32 |
+ |
* n A1 A2 .. |
33 |
+ |
* |
34 |
+ |
* |
35 |
|
* Vfname is the name of the file where the variable definitions |
36 |
|
* can be found. The list of real arguments can be accessed by |
37 |
|
* definitions in the file. Dfname is the data file. |
38 |
+ |
* (Pfname is a picture file.) |
39 |
|
* The dimensions of the data files and the number |
40 |
|
* of variables must match. The func is a single argument |
41 |
< |
* function which returns the corrected data value given the |
41 |
> |
* function in the case of mixdata (three argument in the case |
42 |
> |
* of mixpict), which returns the corrected data value given the |
43 |
|
* interpolated value from the file. The xf is a transformation |
44 |
|
* to get from the original coordinates to the current coordinates. |
45 |
|
*/ |
81 |
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coef = datavalue(dp, pt); |
82 |
|
errno = 0; |
83 |
|
coef = funvalue(m->oargs.sarg[2], 1, &coef); |
84 |
+ |
if (errno) |
85 |
+ |
goto computerr; |
86 |
+ |
if (raymixture(r, mod[0], mod[1], coef)) { |
87 |
+ |
if (m->omod != OVOID) |
88 |
+ |
objerror(m, USER, "inappropriate modifier"); |
89 |
+ |
return(1); |
90 |
+ |
} |
91 |
+ |
return(0); |
92 |
+ |
computerr: |
93 |
+ |
objerror(m, WARNING, "compute error"); |
94 |
+ |
return(0); |
95 |
+ |
} |
96 |
+ |
|
97 |
+ |
|
98 |
+ |
mx_pdata(m, r) /* interpolate mixture picture */ |
99 |
+ |
register OBJREC *m; |
100 |
+ |
RAY *r; |
101 |
+ |
{ |
102 |
+ |
OBJECT obj; |
103 |
+ |
double col[3], coef; |
104 |
+ |
double pt[MAXDIM]; |
105 |
+ |
DATARRAY *dp; |
106 |
+ |
OBJECT mod[2]; |
107 |
+ |
register MFUNC *mf; |
108 |
+ |
register int i; |
109 |
+ |
|
110 |
+ |
if (m->oargs.nsargs < 7) |
111 |
+ |
objerror(m, USER, "bad # arguments"); |
112 |
+ |
obj = objndx(m); |
113 |
+ |
for (i = 0; i < 2; i++) |
114 |
+ |
if (!strcmp(m->oargs.sarg[i], VOIDID)) |
115 |
+ |
mod[i] = OVOID; |
116 |
+ |
else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) { |
117 |
+ |
sprintf(errmsg, "undefined modifier \"%s\"", |
118 |
+ |
m->oargs.sarg[i]); |
119 |
+ |
objerror(m, USER, errmsg); |
120 |
+ |
} |
121 |
+ |
dp = getpict(m->oargs.sarg[3]); |
122 |
+ |
mf = getfunc(m, 4, 0x3<<5, 0); |
123 |
+ |
setfunc(m, r); |
124 |
+ |
errno = 0; |
125 |
+ |
pt[1] = evalue(mf->ep[0]); /* y major ordering */ |
126 |
+ |
pt[0] = evalue(mf->ep[1]); |
127 |
+ |
if (errno) |
128 |
+ |
goto computerr; |
129 |
+ |
for (i = 0; i < 3; i++) /* get pixel from picture */ |
130 |
+ |
col[i] = datavalue(dp+i, pt); |
131 |
+ |
errno = 0; /* evaluate function on pixel */ |
132 |
+ |
coef = funvalue(m->oargs.sarg[2], 3, col); |
133 |
|
if (errno) |
134 |
|
goto computerr; |
135 |
|
if (raymixture(r, mod[0], mod[1], coef)) { |