15 |
|
#include "paths.h" |
16 |
|
#include "view.h" |
17 |
|
|
18 |
– |
|
19 |
– |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
20 |
– |
#define VEQ(v,w) (FEQ((v)[0],(w)[0]) && FEQ((v)[1],(w)[1]) \ |
21 |
– |
&& FEQ((v)[2],(w)[2])) |
22 |
– |
|
18 |
|
VIEW stdview = STDVIEW; /* default view parameters */ |
19 |
|
|
20 |
|
static gethfunc gethview; |
63 |
|
return(ill_horiz); |
64 |
|
if (v->vert >= 180.0-FTINY) |
65 |
|
return(ill_vert); |
66 |
< |
v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
67 |
< |
v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
66 |
> |
v->hn2 = 2.0 * tan(v->horiz*(PI/360.)); |
67 |
> |
v->vn2 = 2.0 * tan(v->vert*(PI/360.)); |
68 |
|
break; |
69 |
|
case VT_CYL: /* cylindrical panorama */ |
70 |
|
if (v->horiz > 360.0+FTINY) |
72 |
|
if (v->vert >= 180.0-FTINY) |
73 |
|
return(ill_vert); |
74 |
|
v->hn2 = v->horiz * (PI/180.0); |
75 |
< |
v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
75 |
> |
v->vn2 = 2.0 * tan(v->vert*(PI/360.)); |
76 |
|
break; |
77 |
|
case VT_ANG: /* angular fisheye */ |
78 |
|
if (v->horiz > 360.0+FTINY) |
87 |
|
return(ill_horiz); |
88 |
|
if (v->vert > 180.0+FTINY) |
89 |
|
return(ill_vert); |
90 |
< |
v->hn2 = 2.0 * sin(v->horiz*(PI/180.0/2.0)); |
91 |
< |
v->vn2 = 2.0 * sin(v->vert*(PI/180.0/2.0)); |
90 |
> |
v->hn2 = 2.0 * sin(v->horiz*(PI/360.)); |
91 |
> |
v->vn2 = 2.0 * sin(v->vert*(PI/360.)); |
92 |
|
break; |
93 |
|
case VT_PLS: /* planispheric fisheye */ |
94 |
|
if (v->horiz >= 360.0-FTINY) |
95 |
|
return(ill_horiz); |
96 |
|
if (v->vert >= 360.0-FTINY) |
97 |
|
return(ill_vert); |
98 |
< |
v->hn2 = 2.*sin(v->horiz*(PI/180.0/2.0)) / |
99 |
< |
(1.0 + cos(v->horiz*(PI/180.0/2.0))); |
100 |
< |
v->vn2 = 2.*sin(v->vert*(PI/180.0/2.0)) / |
101 |
< |
(1.0 + cos(v->vert*(PI/180.0/2.0))); |
98 |
> |
v->hn2 = 2.*sin(v->horiz*(PI/360.)) / |
99 |
> |
(1.0 + cos(v->horiz*(PI/360.))); |
100 |
> |
v->vn2 = 2.*sin(v->vert*(PI/360.)) / |
101 |
> |
(1.0 + cos(v->vert*(PI/360.))); |
102 |
|
break; |
103 |
|
default: |
104 |
|
return("unknown view type"); |
120 |
|
} |
121 |
|
|
122 |
|
|
123 |
+ |
char * |
124 |
+ |
cropview( /* crop a view to the indicated bounds */ |
125 |
+ |
VIEW *v, |
126 |
+ |
double x0, |
127 |
+ |
double y0, |
128 |
+ |
double x1, |
129 |
+ |
double y1 |
130 |
+ |
) |
131 |
+ |
{ |
132 |
+ |
static char ill_hemi[] = "illegal crop for hemispherical view"; |
133 |
+ |
double d; |
134 |
+ |
/* order crop extrema */ |
135 |
+ |
if (x0 > x1) { d=x0; x0=x1; x1=d; } |
136 |
+ |
if (y0 > y1) { d=y0; y0=y1; y1=d; } |
137 |
+ |
|
138 |
+ |
if ((x1-x0 <= FTINY) | (y1-y0 <= FTINY)) |
139 |
+ |
return("zero crop area"); |
140 |
+ |
|
141 |
+ |
d = x1 - x0; /* adjust horizontal size? */ |
142 |
+ |
if (!FABSEQ(d, 1.)) |
143 |
+ |
switch (v->type) { |
144 |
+ |
case VT_PER: |
145 |
+ |
v->horiz = 360./PI*atan( d*tan(PI/360.*v->horiz) ); |
146 |
+ |
break; |
147 |
+ |
case VT_PAR: |
148 |
+ |
case VT_ANG: |
149 |
+ |
case VT_CYL: |
150 |
+ |
v->horiz *= d; |
151 |
+ |
break; |
152 |
+ |
case VT_HEM: |
153 |
+ |
d *= sin(PI/360.*v->horiz); |
154 |
+ |
if (d > 1.) |
155 |
+ |
return(ill_hemi); |
156 |
+ |
v->horiz = 360./PI*asin( d ); |
157 |
+ |
break; |
158 |
+ |
case VT_PLS: |
159 |
+ |
d *= sin(PI/360.*v->horiz) / |
160 |
+ |
(1. + cos(PI/360.*v->horiz)); |
161 |
+ |
v->horiz = 360./PI*acos( (1. - d*d) / (1. + d*d) ); |
162 |
+ |
break; |
163 |
+ |
} |
164 |
+ |
|
165 |
+ |
d = y1 - y0; /* adjust vertical size? */ |
166 |
+ |
if (!FABSEQ(d, 1.)) |
167 |
+ |
switch (v->type) { |
168 |
+ |
case VT_PER: |
169 |
+ |
case VT_CYL: |
170 |
+ |
v->vert = 360./PI*atan( d*tan(PI/360.*v->vert) ); |
171 |
+ |
break; |
172 |
+ |
case VT_PAR: |
173 |
+ |
case VT_ANG: |
174 |
+ |
v->vert *= d; |
175 |
+ |
break; |
176 |
+ |
case VT_HEM: |
177 |
+ |
d *= sin(PI/360.*v->vert); |
178 |
+ |
if (d > 1.) |
179 |
+ |
return(ill_hemi); |
180 |
+ |
v->vert = 360./PI*asin( d ); |
181 |
+ |
break; |
182 |
+ |
case VT_PLS: |
183 |
+ |
d *= sin(PI/360.*v->vert) / |
184 |
+ |
(1. + cos(PI/360.*v->vert)); |
185 |
+ |
v->vert = 360./PI*acos( (1. - d*d) / (1. + d*d) ); |
186 |
+ |
break; |
187 |
+ |
} |
188 |
+ |
/* adjust offsets */ |
189 |
+ |
v->hoff = ((x0 + x1)*.5 - .5 + v->hoff) / (x1 - x0); |
190 |
+ |
v->voff = ((y0 + y1)*.5 - .5 + v->voff) / (y1 - y0); |
191 |
+ |
|
192 |
+ |
return(setview(v)); /* final error checks & set-up */ |
193 |
+ |
} |
194 |
+ |
|
195 |
+ |
|
196 |
|
void |
197 |
|
normaspect( /* fix pixel aspect or resolution */ |
198 |
|
double va, /* view aspect ratio */ |
340 |
|
d = DOT(disp,v->hvec); |
341 |
|
d2 = DOT(disp,v->vdir); |
342 |
|
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
343 |
< |
d = d*d + d2*d2; |
344 |
< |
if (d <= FTINY*FTINY) |
343 |
> |
d2 = d*d + d2*d2; |
344 |
> |
if (d2 <= FTINY*FTINY) |
345 |
|
return(VL_BAD); /* at pole */ |
346 |
< |
if ((v->vaft > FTINY) & (d >= v->vaft*v->vaft)) |
346 |
> |
if ((v->vaft > FTINY) & (d2 >= v->vaft*v->vaft)) |
347 |
|
rflags |= VL_BEYOND; |
348 |
< |
d = 1.0/sqrt(d); |
348 |
> |
d = 1.0/sqrt(d2); |
349 |
|
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
350 |
|
ip[2] = VLEN(disp); |
351 |
|
ip[2] *= (1.0 - v->vfore*d); |
582 |
|
sprintf(cp, " -vt%c", vp->type); |
583 |
|
cp += strlen(cp); |
584 |
|
} |
585 |
< |
if (!VEQ(vp->vp,stdview.vp)) { |
585 |
> |
if (!VABSEQ(vp->vp,stdview.vp)) { |
586 |
|
sprintf(cp, " -vp %.6g %.6g %.6g", |
587 |
|
vp->vp[0], vp->vp[1], vp->vp[2]); |
588 |
|
cp += strlen(cp); |
589 |
|
} |
590 |
< |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
590 |
> |
if (!FABSEQ(vp->vdist,stdview.vdist) || !VABSEQ(vp->vdir,stdview.vdir)) { |
591 |
|
sprintf(cp, " -vd %.6g %.6g %.6g", |
592 |
|
vp->vdir[0]*vp->vdist, |
593 |
|
vp->vdir[1]*vp->vdist, |
594 |
|
vp->vdir[2]*vp->vdist); |
595 |
|
cp += strlen(cp); |
596 |
|
} |
597 |
< |
if (!VEQ(vp->vup,stdview.vup)) { |
597 |
> |
if (!VABSEQ(vp->vup,stdview.vup)) { |
598 |
|
sprintf(cp, " -vu %.6g %.6g %.6g", |
599 |
|
vp->vup[0], vp->vup[1], vp->vup[2]); |
600 |
|
cp += strlen(cp); |
601 |
|
} |
602 |
< |
if (!FEQ(vp->horiz,stdview.horiz)) { |
602 |
> |
if (!FABSEQ(vp->horiz,stdview.horiz)) { |
603 |
|
sprintf(cp, " -vh %.6g", vp->horiz); |
604 |
|
cp += strlen(cp); |
605 |
|
} |
606 |
< |
if (!FEQ(vp->vert,stdview.vert)) { |
606 |
> |
if (!FABSEQ(vp->vert,stdview.vert)) { |
607 |
|
sprintf(cp, " -vv %.6g", vp->vert); |
608 |
|
cp += strlen(cp); |
609 |
|
} |
610 |
< |
if (!FEQ(vp->vfore,stdview.vfore)) { |
610 |
> |
if (!FABSEQ(vp->vfore,stdview.vfore)) { |
611 |
|
sprintf(cp, " -vo %.6g", vp->vfore); |
612 |
|
cp += strlen(cp); |
613 |
|
} |
614 |
< |
if (!FEQ(vp->vaft,stdview.vaft)) { |
614 |
> |
if (!FABSEQ(vp->vaft,stdview.vaft)) { |
615 |
|
sprintf(cp, " -va %.6g", vp->vaft); |
616 |
|
cp += strlen(cp); |
617 |
|
} |
618 |
< |
if (!FEQ(vp->hoff,stdview.hoff)) { |
618 |
> |
if (!FABSEQ(vp->hoff,stdview.hoff)) { |
619 |
|
sprintf(cp, " -vs %.6g", vp->hoff); |
620 |
|
cp += strlen(cp); |
621 |
|
} |
622 |
< |
if (!FEQ(vp->voff,stdview.voff)) { |
622 |
> |
if (!FABSEQ(vp->voff,stdview.voff)) { |
623 |
|
sprintf(cp, " -vl %.6g", vp->voff); |
624 |
|
cp += strlen(cp); |
625 |
|
} |
698 |
|
if (rp != NULL && !fgetsresolu(rp, fp)) |
699 |
|
mvs.ok = 0; |
700 |
|
|
701 |
< |
fclose(fp); |
701 |
> |
if (fp != stdin) |
702 |
> |
fclose(fp); |
703 |
|
|
704 |
|
return(mvs.ok); |
705 |
|
} |