13 |
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14 |
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#define PI 3.14159265358979323846 |
15 |
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|
16 |
< |
#define checkarg(a,n) if (strcmp(av[i],a) || i+n >= ac) return(i) |
16 |
> |
#define checkarg(a,n) if (strcmp(av[i],a) || i+n >= ac) goto done |
17 |
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|
18 |
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|
19 |
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int |
20 |
< |
xf(xfmat, xfsca, ac, av) /* get transform specification */ |
21 |
< |
double xfmat[4][4]; |
22 |
< |
double *xfsca; |
20 |
> |
xf(retmat, retsca, ac, av) /* get transform specification */ |
21 |
> |
double retmat[4][4]; |
22 |
> |
double *retsca; |
23 |
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int ac; |
24 |
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char *av[]; |
25 |
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{ |
26 |
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double atof(), sin(), cos(); |
27 |
< |
double m4[4][4]; |
28 |
< |
double theta; |
29 |
< |
int i; |
27 |
> |
double xfmat[4][4], m4[4][4]; |
28 |
> |
double xfsca, theta; |
29 |
> |
int i, j; |
30 |
> |
int rept; |
31 |
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|
32 |
+ |
setident4(retmat); |
33 |
+ |
*retsca = 1.0; |
34 |
+ |
|
35 |
+ |
rept = 1; |
36 |
+ |
setident4(xfmat); |
37 |
+ |
xfsca = 1.0; |
38 |
+ |
|
39 |
|
for (i = 0; i < ac && av[i][0] == '-'; i++) { |
40 |
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|
41 |
|
setident4(m4); |
59 |
|
break; |
60 |
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case 'y': |
61 |
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checkarg("-ry",1); |
62 |
< |
theta = PI/180 * atof(av[++i]); |
62 |
> |
theta = PI/180.0 * atof(av[++i]); |
63 |
|
m4[0][0] = m4[2][2] = cos(theta); |
64 |
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m4[0][2] = -(m4[2][0] = sin(theta)); |
65 |
|
break; |
66 |
|
case 'z': |
67 |
|
checkarg("-rz",1); |
68 |
< |
theta = PI/180 * atof(av[++i]); |
68 |
> |
theta = PI/180.0 * atof(av[++i]); |
69 |
|
m4[0][0] = m4[1][1] = cos(theta); |
70 |
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m4[1][0] = -(m4[0][1] = sin(theta)); |
71 |
|
break; |
76 |
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|
77 |
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case 's': /* scale */ |
78 |
|
checkarg("-s",1); |
79 |
< |
*xfsca *= |
79 |
> |
xfsca *= |
80 |
|
m4[0][0] = |
81 |
|
m4[1][1] = |
82 |
|
m4[2][2] = atof(av[++i]); |
86 |
|
switch (av[i][2]) { |
87 |
|
case 'x': |
88 |
|
checkarg("-mx",0); |
89 |
< |
*xfsca *= |
89 |
> |
xfsca *= |
90 |
|
m4[0][0] = -1.0; |
91 |
|
break; |
92 |
|
case 'y': |
93 |
|
checkarg("-my",0); |
94 |
< |
*xfsca *= |
94 |
> |
xfsca *= |
95 |
|
m4[1][1] = -1.0; |
96 |
|
break; |
97 |
|
case 'z': |
98 |
|
checkarg("-mz",0); |
99 |
< |
*xfsca *= |
99 |
> |
xfsca *= |
100 |
|
m4[2][2] = -1.0; |
101 |
|
break; |
102 |
|
default: |
104 |
|
} |
105 |
|
break; |
106 |
|
|
107 |
+ |
case 'i': /* iterate */ |
108 |
+ |
checkarg("-i",1); |
109 |
+ |
for (j = 0; j < rept; j++) { |
110 |
+ |
multmat4(retmat, retmat, xfmat); |
111 |
+ |
*retsca *= xfsca; |
112 |
+ |
} |
113 |
+ |
rept = atoi(av[++i]); |
114 |
+ |
setident4(xfmat); |
115 |
+ |
xfsca = 1.0; |
116 |
+ |
break; |
117 |
+ |
|
118 |
|
default: |
119 |
|
return(i); |
120 |
|
|
121 |
|
} |
122 |
|
multmat4(xfmat, xfmat, m4); |
123 |
|
} |
124 |
+ |
done: |
125 |
+ |
for (j = 0; j < rept; j++) { |
126 |
+ |
multmat4(retmat, retmat, xfmat); |
127 |
+ |
*retsca *= xfsca; |
128 |
+ |
} |
129 |
|
return(i); |
130 |
|
} |
131 |
|
|
132 |
|
|
133 |
|
#ifdef INVXF |
134 |
|
int |
135 |
< |
invxf(xfmat, xfsca, ac, av) /* invert transform specification */ |
136 |
< |
double xfmat[4][4]; |
137 |
< |
double *xfsca; |
135 |
> |
invxf(retmat, retsca, ac, av) /* invert transform specification */ |
136 |
> |
double retmat[4][4]; |
137 |
> |
double *retsca; |
138 |
|
int ac; |
139 |
|
char *av[]; |
140 |
|
{ |
141 |
|
double atof(), sin(), cos(); |
142 |
< |
double m4[4][4]; |
143 |
< |
double theta; |
144 |
< |
int i; |
142 |
> |
double xfmat[4][4], m4[4][4]; |
143 |
> |
double xfsca, theta; |
144 |
> |
int i, j; |
145 |
> |
int rept; |
146 |
|
|
147 |
+ |
setident4(retmat); |
148 |
+ |
*retsca = 1.0; |
149 |
+ |
|
150 |
+ |
rept = 1; |
151 |
+ |
setident4(xfmat); |
152 |
+ |
xfsca = 1.0; |
153 |
+ |
|
154 |
|
for (i = 0; i < ac && av[i][0] == '-'; i++) { |
155 |
|
|
156 |
|
setident4(m4); |
219 |
|
} |
220 |
|
break; |
221 |
|
|
222 |
+ |
case 'i': /* iterate */ |
223 |
+ |
checkarg("-i",1); |
224 |
+ |
for (j = 0; j < rept; j++) { |
225 |
+ |
multmat4(retmat, xfmat, retmat); |
226 |
+ |
*retsca *= xfsca; |
227 |
+ |
} |
228 |
+ |
rept = atoi(av[++i]); |
229 |
+ |
setident4(xfmat); |
230 |
+ |
xfsca = 1.0; |
231 |
+ |
break; |
232 |
+ |
|
233 |
|
default: |
234 |
|
return(i); |
235 |
|
|
236 |
|
} |
237 |
|
multmat4(xfmat, m4, xfmat); /* left multiply */ |
238 |
+ |
} |
239 |
+ |
done: |
240 |
+ |
for (j = 0; j < rept; j++) { |
241 |
+ |
multmat4(retmat, xfmat, retmat); |
242 |
+ |
*retsca *= xfsca; |
243 |
|
} |
244 |
|
return(i); |
245 |
|
} |