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 |
|
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, icnt; |
30 |
|
|
31 |
+ |
setident4(retmat); |
32 |
+ |
*retsca = 1.0; |
33 |
+ |
|
34 |
+ |
setident4(xfmat); |
35 |
+ |
xfsca = 1.0; |
36 |
+ |
|
37 |
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for (i = 0; i < ac && av[i][0] == '-'; i++) { |
38 |
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|
39 |
|
setident4(m4); |
57 |
|
break; |
58 |
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case 'y': |
59 |
|
checkarg("-ry",1); |
60 |
< |
theta = PI/180 * atof(av[++i]); |
60 |
> |
theta = PI/180.0 * atof(av[++i]); |
61 |
|
m4[0][0] = m4[2][2] = cos(theta); |
62 |
|
m4[0][2] = -(m4[2][0] = sin(theta)); |
63 |
|
break; |
64 |
|
case 'z': |
65 |
|
checkarg("-rz",1); |
66 |
< |
theta = PI/180 * atof(av[++i]); |
66 |
> |
theta = PI/180.0 * atof(av[++i]); |
67 |
|
m4[0][0] = m4[1][1] = cos(theta); |
68 |
|
m4[1][0] = -(m4[0][1] = sin(theta)); |
69 |
|
break; |
74 |
|
|
75 |
|
case 's': /* scale */ |
76 |
|
checkarg("-s",1); |
77 |
< |
*xfsca *= |
77 |
> |
xfsca *= |
78 |
|
m4[0][0] = |
79 |
|
m4[1][1] = |
80 |
|
m4[2][2] = atof(av[++i]); |
84 |
|
switch (av[i][2]) { |
85 |
|
case 'x': |
86 |
|
checkarg("-mx",0); |
87 |
< |
*xfsca *= |
87 |
> |
xfsca *= |
88 |
|
m4[0][0] = -1.0; |
89 |
|
break; |
90 |
|
case 'y': |
91 |
|
checkarg("-my",0); |
92 |
< |
*xfsca *= |
92 |
> |
xfsca *= |
93 |
|
m4[1][1] = -1.0; |
94 |
|
break; |
95 |
|
case 'z': |
96 |
|
checkarg("-mz",0); |
97 |
< |
*xfsca *= |
97 |
> |
xfsca *= |
98 |
|
m4[2][2] = -1.0; |
99 |
|
break; |
100 |
|
default: |
102 |
|
} |
103 |
|
break; |
104 |
|
|
105 |
+ |
case 'i': /* iterate */ |
106 |
+ |
checkarg("-i",1); |
107 |
+ |
icnt = atoi(av[++i]); |
108 |
+ |
while (icnt-- > 0) { |
109 |
+ |
multmat4(retmat, retmat, xfmat); |
110 |
+ |
*retsca *= xfsca; |
111 |
+ |
} |
112 |
+ |
setident4(xfmat); |
113 |
+ |
xfsca = 1.0; |
114 |
+ |
break; |
115 |
+ |
|
116 |
|
default: |
117 |
|
return(i); |
118 |
|
|
119 |
|
} |
120 |
|
multmat4(xfmat, xfmat, m4); |
121 |
|
} |
122 |
+ |
done: |
123 |
+ |
multmat4(retmat, retmat, xfmat); |
124 |
+ |
*retsca *= xfsca; |
125 |
|
return(i); |
126 |
|
} |
127 |
|
|
128 |
|
|
129 |
|
#ifdef INVXF |
130 |
|
int |
131 |
< |
invxf(xfmat, xfsca, ac, av) /* invert transform specification */ |
132 |
< |
double xfmat[4][4]; |
133 |
< |
double *xfsca; |
131 |
> |
invxf(retmat, retsca, ac, av) /* invert transform specification */ |
132 |
> |
double retmat[4][4]; |
133 |
> |
double *retsca; |
134 |
|
int ac; |
135 |
|
char *av[]; |
136 |
|
{ |
137 |
|
double atof(), sin(), cos(); |
138 |
< |
double m4[4][4]; |
139 |
< |
double theta; |
140 |
< |
int i; |
138 |
> |
double xfmat[4][4], m4[4][4]; |
139 |
> |
double xfsca, theta; |
140 |
> |
int i, icnt; |
141 |
|
|
142 |
+ |
setident4(retmat); |
143 |
+ |
*retsca = 1.0; |
144 |
+ |
|
145 |
+ |
setident4(xfmat); |
146 |
+ |
xfsca = 1.0; |
147 |
+ |
|
148 |
|
for (i = 0; i < ac && av[i][0] == '-'; i++) { |
149 |
|
|
150 |
|
setident4(m4); |
185 |
|
|
186 |
|
case 's': /* scale */ |
187 |
|
checkarg("-s",1); |
188 |
< |
*xfsca *= |
188 |
> |
xfsca *= |
189 |
|
m4[0][0] = |
190 |
|
m4[1][1] = |
191 |
|
m4[2][2] = 1.0 / atof(av[++i]); |
195 |
|
switch (av[i][2]) { |
196 |
|
case 'x': |
197 |
|
checkarg("-mx",0); |
198 |
< |
*xfsca *= |
198 |
> |
xfsca *= |
199 |
|
m4[0][0] = -1.0; |
200 |
|
break; |
201 |
|
case 'y': |
202 |
|
checkarg("-my",0); |
203 |
< |
*xfsca *= |
203 |
> |
xfsca *= |
204 |
|
m4[1][1] = -1.0; |
205 |
|
break; |
206 |
|
case 'z': |
207 |
|
checkarg("-mz",0); |
208 |
< |
*xfsca *= |
208 |
> |
xfsca *= |
209 |
|
m4[2][2] = -1.0; |
210 |
|
break; |
211 |
|
default: |
213 |
|
} |
214 |
|
break; |
215 |
|
|
216 |
+ |
case 'i': /* iterate */ |
217 |
+ |
checkarg("-i",1); |
218 |
+ |
icnt = atoi(av[++i]); |
219 |
+ |
while (icnt-- > 0) { |
220 |
+ |
multmat4(retmat, xfmat, retmat); |
221 |
+ |
*retsca *= xfsca; |
222 |
+ |
} |
223 |
+ |
setident4(xfmat); |
224 |
+ |
xfsca = 1.0; |
225 |
+ |
break; |
226 |
+ |
|
227 |
|
default: |
228 |
|
return(i); |
229 |
|
|
230 |
|
} |
231 |
|
multmat4(xfmat, m4, xfmat); /* left multiply */ |
232 |
|
} |
233 |
+ |
done: |
234 |
+ |
multmat4(retmat, xfmat, retmat); |
235 |
+ |
*retsca *= xfsca; |
236 |
|
return(i); |
237 |
|
} |
238 |
|
#endif |