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 |
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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 |
+ |
setident4(xfmat); |
36 |
+ |
xfsca = 1.0; |
37 |
+ |
|
38 |
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for (i = 0; i < ac && av[i][0] == '-'; i++) { |
39 |
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|
40 |
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setident4(m4); |
42 |
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switch (av[i][1]) { |
43 |
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|
44 |
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case 't': /* translate */ |
45 |
+ |
checkarg(2,3); |
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m4[3][0] = atof(av[++i]); |
47 |
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m4[3][1] = atof(av[++i]); |
48 |
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m4[3][2] = atof(av[++i]); |
51 |
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case 'r': /* rotate */ |
52 |
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switch (av[i][2]) { |
53 |
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case 'x': |
54 |
< |
theta = PI/180.0 * atof(av[++i]); |
55 |
< |
m4[1][1] = m4[2][2] = cos(theta); |
56 |
< |
m4[2][1] = -(m4[1][2] = sin(theta)); |
54 |
> |
checkarg(3,1); |
55 |
> |
dtmp = d2r(atof(av[++i])); |
56 |
> |
m4[1][1] = m4[2][2] = cos(dtmp); |
57 |
> |
m4[2][1] = -(m4[1][2] = sin(dtmp)); |
58 |
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break; |
59 |
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case 'y': |
60 |
< |
theta = PI/180 * atof(av[++i]); |
61 |
< |
m4[0][0] = m4[2][2] = cos(theta); |
62 |
< |
m4[0][2] = -(m4[2][0] = sin(theta)); |
60 |
> |
checkarg(3,1); |
61 |
> |
dtmp = d2r(atof(av[++i])); |
62 |
> |
m4[0][0] = m4[2][2] = cos(dtmp); |
63 |
> |
m4[0][2] = -(m4[2][0] = sin(dtmp)); |
64 |
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break; |
65 |
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case 'z': |
66 |
< |
theta = PI/180 * atof(av[++i]); |
67 |
< |
m4[0][0] = m4[1][1] = cos(theta); |
68 |
< |
m4[1][0] = -(m4[0][1] = sin(theta)); |
66 |
> |
checkarg(3,1); |
67 |
> |
dtmp = d2r(atof(av[++i])); |
68 |
> |
m4[0][0] = m4[1][1] = cos(dtmp); |
69 |
> |
m4[1][0] = -(m4[0][1] = sin(dtmp)); |
70 |
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break; |
71 |
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default: |
72 |
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return(i); |
74 |
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break; |
75 |
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|
76 |
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case 's': /* scale */ |
77 |
< |
*xfsca *= |
77 |
> |
checkarg(2,1); |
78 |
> |
dtmp = atof(av[i+1]); |
79 |
> |
if (dtmp == 0.0) goto done; |
80 |
> |
i++; |
81 |
> |
xfsca *= |
82 |
|
m4[0][0] = |
83 |
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m4[1][1] = |
84 |
< |
m4[2][2] = atof(av[++i]); |
84 |
> |
m4[2][2] = dtmp; |
85 |
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break; |
86 |
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|
87 |
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case 'm': /* mirror */ |
88 |
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switch (av[i][2]) { |
89 |
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case 'x': |
90 |
< |
*xfsca *= |
90 |
> |
checkarg(3,0); |
91 |
> |
xfsca *= |
92 |
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m4[0][0] = -1.0; |
93 |
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break; |
94 |
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case 'y': |
95 |
< |
*xfsca *= |
95 |
> |
checkarg(3,0); |
96 |
> |
xfsca *= |
97 |
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m4[1][1] = -1.0; |
98 |
|
break; |
99 |
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case 'z': |
100 |
< |
*xfsca *= |
100 |
> |
checkarg(3,0); |
101 |
> |
xfsca *= |
102 |
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m4[2][2] = -1.0; |
103 |
|
break; |
104 |
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default: |
106 |
|
} |
107 |
|
break; |
108 |
|
|
109 |
+ |
case 'i': /* iterate */ |
110 |
+ |
checkarg(2,1); |
111 |
+ |
icnt = atoi(av[++i]); |
112 |
+ |
while (icnt-- > 0) { |
113 |
+ |
multmat4(retmat, retmat, xfmat); |
114 |
+ |
*retsca *= xfsca; |
115 |
+ |
} |
116 |
+ |
setident4(xfmat); |
117 |
+ |
xfsca = 1.0; |
118 |
+ |
break; |
119 |
+ |
|
120 |
|
default: |
121 |
|
return(i); |
122 |
|
|
123 |
|
} |
124 |
|
multmat4(xfmat, xfmat, m4); |
125 |
|
} |
126 |
+ |
done: |
127 |
+ |
multmat4(retmat, retmat, xfmat); |
128 |
+ |
*retsca *= xfsca; |
129 |
|
return(i); |
130 |
|
} |
131 |
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|
132 |
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|
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, dtmp; |
144 |
> |
int i, icnt; |
145 |
|
|
146 |
+ |
setident4(retmat); |
147 |
+ |
*retsca = 1.0; |
148 |
+ |
|
149 |
+ |
setident4(xfmat); |
150 |
+ |
xfsca = 1.0; |
151 |
+ |
|
152 |
|
for (i = 0; i < ac && av[i][0] == '-'; i++) { |
153 |
|
|
154 |
|
setident4(m4); |
156 |
|
switch (av[i][1]) { |
157 |
|
|
158 |
|
case 't': /* translate */ |
159 |
+ |
checkarg(2,3); |
160 |
|
m4[3][0] = -atof(av[++i]); |
161 |
|
m4[3][1] = -atof(av[++i]); |
162 |
|
m4[3][2] = -atof(av[++i]); |
165 |
|
case 'r': /* rotate */ |
166 |
|
switch (av[i][2]) { |
167 |
|
case 'x': |
168 |
< |
theta = -PI/180.0 * atof(av[++i]); |
169 |
< |
m4[1][1] = m4[2][2] = cos(theta); |
170 |
< |
m4[2][1] = -(m4[1][2] = sin(theta)); |
168 |
> |
checkarg(3,1); |
169 |
> |
dtmp = -d2r(atof(av[++i])); |
170 |
> |
m4[1][1] = m4[2][2] = cos(dtmp); |
171 |
> |
m4[2][1] = -(m4[1][2] = sin(dtmp)); |
172 |
|
break; |
173 |
|
case 'y': |
174 |
< |
theta = -PI/180.0 * atof(av[++i]); |
175 |
< |
m4[0][0] = m4[2][2] = cos(theta); |
176 |
< |
m4[0][2] = -(m4[2][0] = sin(theta)); |
174 |
> |
checkarg(3,1); |
175 |
> |
dtmp = -d2r(atof(av[++i])); |
176 |
> |
m4[0][0] = m4[2][2] = cos(dtmp); |
177 |
> |
m4[0][2] = -(m4[2][0] = sin(dtmp)); |
178 |
|
break; |
179 |
|
case 'z': |
180 |
< |
theta = -PI/180.0 * atof(av[++i]); |
181 |
< |
m4[0][0] = m4[1][1] = cos(theta); |
182 |
< |
m4[1][0] = -(m4[0][1] = sin(theta)); |
180 |
> |
checkarg(3,1); |
181 |
> |
dtmp = -d2r(atof(av[++i])); |
182 |
> |
m4[0][0] = m4[1][1] = cos(dtmp); |
183 |
> |
m4[1][0] = -(m4[0][1] = sin(dtmp)); |
184 |
|
break; |
185 |
|
default: |
186 |
|
return(i); |
188 |
|
break; |
189 |
|
|
190 |
|
case 's': /* scale */ |
191 |
< |
*xfsca *= |
191 |
> |
checkarg(2,1); |
192 |
> |
dtmp = atof(av[i+1]); |
193 |
> |
if (dtmp == 0.0) goto done; |
194 |
> |
i++; |
195 |
> |
xfsca *= |
196 |
|
m4[0][0] = |
197 |
|
m4[1][1] = |
198 |
< |
m4[2][2] = 1.0 / atof(av[++i]); |
198 |
> |
m4[2][2] = 1.0 / dtmp; |
199 |
|
break; |
200 |
|
|
201 |
|
case 'm': /* mirror */ |
202 |
|
switch (av[i][2]) { |
203 |
|
case 'x': |
204 |
< |
*xfsca *= |
204 |
> |
checkarg(3,0); |
205 |
> |
xfsca *= |
206 |
|
m4[0][0] = -1.0; |
207 |
|
break; |
208 |
|
case 'y': |
209 |
< |
*xfsca *= |
209 |
> |
checkarg(3,0); |
210 |
> |
xfsca *= |
211 |
|
m4[1][1] = -1.0; |
212 |
|
break; |
213 |
|
case 'z': |
214 |
< |
*xfsca *= |
214 |
> |
checkarg(3,0); |
215 |
> |
xfsca *= |
216 |
|
m4[2][2] = -1.0; |
217 |
|
break; |
218 |
|
default: |
220 |
|
} |
221 |
|
break; |
222 |
|
|
223 |
+ |
case 'i': /* iterate */ |
224 |
+ |
checkarg(2,1); |
225 |
+ |
icnt = atoi(av[++i]); |
226 |
+ |
while (icnt-- > 0) { |
227 |
+ |
multmat4(retmat, xfmat, retmat); |
228 |
+ |
*retsca *= xfsca; |
229 |
+ |
} |
230 |
+ |
setident4(xfmat); |
231 |
+ |
xfsca = 1.0; |
232 |
+ |
break; |
233 |
+ |
|
234 |
|
default: |
235 |
|
return(i); |
236 |
|
|
237 |
|
} |
238 |
|
multmat4(xfmat, m4, xfmat); /* left multiply */ |
239 |
|
} |
240 |
+ |
done: |
241 |
+ |
multmat4(retmat, xfmat, retmat); |
242 |
+ |
*retsca *= xfsca; |
243 |
|
return(i); |
244 |
|
} |
245 |
|
#endif |