133 |
|
double sum; |
134 |
|
register RAY *r; |
135 |
|
|
136 |
< |
n--; /* for convenience */ |
136 |
> |
if (--n < 0) |
137 |
> |
goto badchan; |
138 |
|
|
138 |
– |
if (n < 0 || n > 23) |
139 |
– |
error(USER, "illegal channel number"); |
140 |
– |
|
141 |
– |
if (n == 9) { /* distance */ |
142 |
– |
|
143 |
– |
sum = fray->rot; |
144 |
– |
for (r = fray->parent; r != NULL; r = r->parent) |
145 |
– |
sum += r->rot; |
146 |
– |
return(sum * fxf.sca); |
147 |
– |
|
148 |
– |
} |
149 |
– |
if (n == 10) /* dot product */ |
150 |
– |
return(fray->rod); |
151 |
– |
|
139 |
|
if (n < 3) /* ray direction */ |
140 |
|
|
141 |
|
return( ( fray->rdir[0]*fxf.xfm[0][n] + |
157 |
|
fray->rop[2]*fxf.xfm[2][n-6] + |
158 |
|
fxf.xfm[3][n-6] ); |
159 |
|
|
160 |
+ |
if (n == 9) { /* distance */ |
161 |
+ |
|
162 |
+ |
sum = fray->rot; |
163 |
+ |
for (r = fray->parent; r != NULL; r = r->parent) |
164 |
+ |
sum += r->rot; |
165 |
+ |
return(sum * fxf.sca); |
166 |
+ |
|
167 |
+ |
} |
168 |
+ |
if (n == 10) /* dot product */ |
169 |
+ |
return(fray->rod); |
170 |
+ |
|
171 |
|
if (n == 11) /* scale */ |
172 |
|
return(fxf.sca); |
173 |
|
|
182 |
|
|
183 |
|
if (n < 24) /* k unit vector */ |
184 |
|
return(fxf.xfm[2][n-21] / fxf.sca); |
185 |
+ |
badchan: |
186 |
+ |
error(USER, "illegal channel number"); |
187 |
|
} |