12 |
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|
13 |
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14 |
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#define PI 3.14159265358979323846 |
15 |
+ |
#define d2r(a) ((PI/180.)*(a)) |
16 |
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|
17 |
+ |
#define checkarg(a,n) if (av[i][a] || i+n >= ac) goto done |
18 |
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|
19 |
+ |
|
20 |
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int |
21 |
< |
xf(xfmat, xfsca, ac, av) /* get transform specification */ |
22 |
< |
double xfmat[4][4]; |
23 |
< |
double *xfsca; |
21 |
> |
xf(retmat, retsca, ac, av) /* get transform specification */ |
22 |
> |
double retmat[4][4]; |
23 |
> |
double *retsca; |
24 |
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int ac; |
25 |
|
char *av[]; |
26 |
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{ |
27 |
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double atof(), sin(), cos(); |
28 |
< |
double m4[4][4]; |
29 |
< |
double theta; |
30 |
< |
int i; |
28 |
> |
double xfmat[4][4], m4[4][4]; |
29 |
> |
double xfsca, dtmp; |
30 |
> |
int i, icnt; |
31 |
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|
32 |
+ |
setident4(retmat); |
33 |
+ |
*retsca = 1.0; |
34 |
+ |
|
35 |
+ |
icnt = 1; |
36 |
+ |
setident4(xfmat); |
37 |
+ |
xfsca = 1.0; |
38 |
+ |
|
39 |
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for (i = 0; i < ac && av[i][0] == '-'; i++) { |
40 |
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|
41 |
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setident4(m4); |
43 |
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switch (av[i][1]) { |
44 |
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|
45 |
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case 't': /* translate */ |
46 |
+ |
checkarg(2,3); |
47 |
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m4[3][0] = atof(av[++i]); |
48 |
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m4[3][1] = atof(av[++i]); |
49 |
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m4[3][2] = atof(av[++i]); |
52 |
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case 'r': /* rotate */ |
53 |
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switch (av[i][2]) { |
54 |
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case 'x': |
55 |
< |
theta = PI/180.0 * atof(av[++i]); |
56 |
< |
m4[1][1] = m4[2][2] = cos(theta); |
57 |
< |
m4[2][1] = -(m4[1][2] = sin(theta)); |
55 |
> |
checkarg(3,1); |
56 |
> |
dtmp = d2r(atof(av[++i])); |
57 |
> |
m4[1][1] = m4[2][2] = cos(dtmp); |
58 |
> |
m4[2][1] = -(m4[1][2] = sin(dtmp)); |
59 |
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break; |
60 |
|
case 'y': |
61 |
< |
theta = PI/180 * atof(av[++i]); |
62 |
< |
m4[0][0] = m4[2][2] = cos(theta); |
63 |
< |
m4[0][2] = -(m4[2][0] = sin(theta)); |
61 |
> |
checkarg(3,1); |
62 |
> |
dtmp = d2r(atof(av[++i])); |
63 |
> |
m4[0][0] = m4[2][2] = cos(dtmp); |
64 |
> |
m4[0][2] = -(m4[2][0] = sin(dtmp)); |
65 |
|
break; |
66 |
|
case 'z': |
67 |
< |
theta = PI/180 * atof(av[++i]); |
68 |
< |
m4[0][0] = m4[1][1] = cos(theta); |
69 |
< |
m4[1][0] = -(m4[0][1] = sin(theta)); |
67 |
> |
checkarg(3,1); |
68 |
> |
dtmp = d2r(atof(av[++i])); |
69 |
> |
m4[0][0] = m4[1][1] = cos(dtmp); |
70 |
> |
m4[1][0] = -(m4[0][1] = sin(dtmp)); |
71 |
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break; |
72 |
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default: |
73 |
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return(i); |
75 |
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break; |
76 |
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|
77 |
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case 's': /* scale */ |
78 |
< |
*xfsca *= |
78 |
> |
checkarg(2,1); |
79 |
> |
dtmp = atof(av[i+1]); |
80 |
> |
if (dtmp == 0.0) goto done; |
81 |
> |
i++; |
82 |
> |
xfsca *= |
83 |
|
m4[0][0] = |
84 |
|
m4[1][1] = |
85 |
< |
m4[2][2] = atof(av[++i]); |
85 |
> |
m4[2][2] = dtmp; |
86 |
|
break; |
87 |
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|
88 |
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case 'm': /* mirror */ |
89 |
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switch (av[i][2]) { |
90 |
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case 'x': |
91 |
< |
*xfsca *= |
91 |
> |
checkarg(3,0); |
92 |
> |
xfsca *= |
93 |
|
m4[0][0] = -1.0; |
94 |
|
break; |
95 |
|
case 'y': |
96 |
< |
*xfsca *= |
96 |
> |
checkarg(3,0); |
97 |
> |
xfsca *= |
98 |
|
m4[1][1] = -1.0; |
99 |
|
break; |
100 |
|
case 'z': |
101 |
< |
*xfsca *= |
101 |
> |
checkarg(3,0); |
102 |
> |
xfsca *= |
103 |
|
m4[2][2] = -1.0; |
104 |
|
break; |
105 |
|
default: |
107 |
|
} |
108 |
|
break; |
109 |
|
|
110 |
+ |
case 'i': /* iterate */ |
111 |
+ |
checkarg(2,1); |
112 |
+ |
while (icnt-- > 0) { |
113 |
+ |
multmat4(retmat, retmat, xfmat); |
114 |
+ |
*retsca *= xfsca; |
115 |
+ |
} |
116 |
+ |
icnt = atoi(av[++i]); |
117 |
+ |
setident4(xfmat); |
118 |
+ |
xfsca = 1.0; |
119 |
+ |
continue; |
120 |
+ |
|
121 |
|
default: |
122 |
|
return(i); |
123 |
|
|
124 |
|
} |
125 |
|
multmat4(xfmat, xfmat, m4); |
126 |
|
} |
127 |
+ |
done: |
128 |
+ |
while (icnt-- > 0) { |
129 |
+ |
multmat4(retmat, retmat, xfmat); |
130 |
+ |
*retsca *= xfsca; |
131 |
+ |
} |
132 |
|
return(i); |
133 |
|
} |
134 |
|
|
135 |
|
|
136 |
|
#ifdef INVXF |
137 |
|
int |
138 |
< |
invxf(xfmat, xfsca, ac, av) /* invert transform specification */ |
139 |
< |
double xfmat[4][4]; |
140 |
< |
double *xfsca; |
138 |
> |
invxf(retmat, retsca, ac, av) /* invert transform specification */ |
139 |
> |
double retmat[4][4]; |
140 |
> |
double *retsca; |
141 |
|
int ac; |
142 |
|
char *av[]; |
143 |
|
{ |
144 |
|
double atof(), sin(), cos(); |
145 |
< |
double m4[4][4]; |
146 |
< |
double theta; |
147 |
< |
int i; |
145 |
> |
double xfmat[4][4], m4[4][4]; |
146 |
> |
double xfsca, dtmp; |
147 |
> |
int i, icnt; |
148 |
|
|
149 |
+ |
setident4(retmat); |
150 |
+ |
*retsca = 1.0; |
151 |
+ |
|
152 |
+ |
icnt = 1; |
153 |
+ |
setident4(xfmat); |
154 |
+ |
xfsca = 1.0; |
155 |
+ |
|
156 |
|
for (i = 0; i < ac && av[i][0] == '-'; i++) { |
157 |
|
|
158 |
|
setident4(m4); |
160 |
|
switch (av[i][1]) { |
161 |
|
|
162 |
|
case 't': /* translate */ |
163 |
+ |
checkarg(2,3); |
164 |
|
m4[3][0] = -atof(av[++i]); |
165 |
|
m4[3][1] = -atof(av[++i]); |
166 |
|
m4[3][2] = -atof(av[++i]); |
169 |
|
case 'r': /* rotate */ |
170 |
|
switch (av[i][2]) { |
171 |
|
case 'x': |
172 |
< |
theta = -PI/180.0 * atof(av[++i]); |
173 |
< |
m4[1][1] = m4[2][2] = cos(theta); |
174 |
< |
m4[2][1] = -(m4[1][2] = sin(theta)); |
172 |
> |
checkarg(3,1); |
173 |
> |
dtmp = -d2r(atof(av[++i])); |
174 |
> |
m4[1][1] = m4[2][2] = cos(dtmp); |
175 |
> |
m4[2][1] = -(m4[1][2] = sin(dtmp)); |
176 |
|
break; |
177 |
|
case 'y': |
178 |
< |
theta = -PI/180.0 * atof(av[++i]); |
179 |
< |
m4[0][0] = m4[2][2] = cos(theta); |
180 |
< |
m4[0][2] = -(m4[2][0] = sin(theta)); |
178 |
> |
checkarg(3,1); |
179 |
> |
dtmp = -d2r(atof(av[++i])); |
180 |
> |
m4[0][0] = m4[2][2] = cos(dtmp); |
181 |
> |
m4[0][2] = -(m4[2][0] = sin(dtmp)); |
182 |
|
break; |
183 |
|
case 'z': |
184 |
< |
theta = -PI/180.0 * atof(av[++i]); |
185 |
< |
m4[0][0] = m4[1][1] = cos(theta); |
186 |
< |
m4[1][0] = -(m4[0][1] = sin(theta)); |
184 |
> |
checkarg(3,1); |
185 |
> |
dtmp = -d2r(atof(av[++i])); |
186 |
> |
m4[0][0] = m4[1][1] = cos(dtmp); |
187 |
> |
m4[1][0] = -(m4[0][1] = sin(dtmp)); |
188 |
|
break; |
189 |
|
default: |
190 |
|
return(i); |
192 |
|
break; |
193 |
|
|
194 |
|
case 's': /* scale */ |
195 |
< |
*xfsca *= |
195 |
> |
checkarg(2,1); |
196 |
> |
dtmp = atof(av[i+1]); |
197 |
> |
if (dtmp == 0.0) goto done; |
198 |
> |
i++; |
199 |
> |
xfsca *= |
200 |
|
m4[0][0] = |
201 |
|
m4[1][1] = |
202 |
< |
m4[2][2] = 1.0 / atof(av[++i]); |
202 |
> |
m4[2][2] = 1.0 / dtmp; |
203 |
|
break; |
204 |
|
|
205 |
|
case 'm': /* mirror */ |
206 |
|
switch (av[i][2]) { |
207 |
|
case 'x': |
208 |
< |
*xfsca *= |
208 |
> |
checkarg(3,0); |
209 |
> |
xfsca *= |
210 |
|
m4[0][0] = -1.0; |
211 |
|
break; |
212 |
|
case 'y': |
213 |
< |
*xfsca *= |
213 |
> |
checkarg(3,0); |
214 |
> |
xfsca *= |
215 |
|
m4[1][1] = -1.0; |
216 |
|
break; |
217 |
|
case 'z': |
218 |
< |
*xfsca *= |
218 |
> |
checkarg(3,0); |
219 |
> |
xfsca *= |
220 |
|
m4[2][2] = -1.0; |
221 |
|
break; |
222 |
|
default: |
224 |
|
} |
225 |
|
break; |
226 |
|
|
227 |
+ |
case 'i': /* iterate */ |
228 |
+ |
checkarg(2,1); |
229 |
+ |
while (icnt-- > 0) { |
230 |
+ |
multmat4(retmat, xfmat, retmat); |
231 |
+ |
*retsca *= xfsca; |
232 |
+ |
} |
233 |
+ |
icnt = atoi(av[++i]); |
234 |
+ |
setident4(xfmat); |
235 |
+ |
xfsca = 1.0; |
236 |
+ |
break; |
237 |
+ |
|
238 |
|
default: |
239 |
|
return(i); |
240 |
|
|
241 |
|
} |
242 |
|
multmat4(xfmat, m4, xfmat); /* left multiply */ |
243 |
+ |
} |
244 |
+ |
done: |
245 |
+ |
while (icnt-- > 0) { |
246 |
+ |
multmat4(retmat, xfmat, retmat); |
247 |
+ |
*retsca *= xfsca; |
248 |
|
} |
249 |
|
return(i); |
250 |
|
} |