27 |
|
{ |
28 |
|
return(EQUAL(v1[0],v2[0]) && EQUAL(v1[1],v2[1])&& EQUAL(v1[2],v2[2])); |
29 |
|
} |
30 |
+ |
#if 0 |
31 |
+ |
extern FVECT Norm[500]; |
32 |
+ |
extern int Ncnt; |
33 |
+ |
#endif |
34 |
|
|
31 |
– |
|
35 |
|
int |
36 |
|
convex_angle(v0,v1,v2) |
37 |
|
FVECT v0,v1,v2; |
38 |
|
{ |
39 |
+ |
double dp,dp1; |
40 |
+ |
int test,test1; |
41 |
+ |
FVECT nv0,nv1,nv2; |
42 |
|
FVECT cp01,cp12,cp; |
43 |
< |
|
43 |
> |
|
44 |
|
/* test sign of (v0Xv1)X(v1Xv2). v1 */ |
45 |
< |
VCROSS(cp01,v0,v1); |
46 |
< |
VCROSS(cp12,v1,v2); |
45 |
> |
/* un-Simplified: */ |
46 |
> |
VCOPY(nv0,v0); |
47 |
> |
normalize(nv0); |
48 |
> |
VCOPY(nv1,v1); |
49 |
> |
normalize(nv1); |
50 |
> |
VCOPY(nv2,v2); |
51 |
> |
normalize(nv2); |
52 |
> |
|
53 |
> |
VCROSS(cp01,nv0,nv1); |
54 |
> |
VCROSS(cp12,nv1,nv2); |
55 |
|
VCROSS(cp,cp01,cp12); |
56 |
< |
if(DOT(cp,v1) < 0.0) |
57 |
< |
return(FALSE); |
58 |
< |
return(TRUE); |
56 |
> |
normalize(cp); |
57 |
> |
dp1 = DOT(cp,nv1); |
58 |
> |
if(dp1 <= 1e-8 || dp1 >= (1-1e-8)) /* Test if on other side,or colinear*/ |
59 |
> |
test1 = FALSE; |
60 |
> |
else |
61 |
> |
test1 = TRUE; |
62 |
> |
|
63 |
> |
dp = nv0[2]*nv1[0]*nv2[1] - nv0[2]*nv1[1]*nv2[0] - nv0[0]*nv1[2]*nv2[1] |
64 |
> |
+ nv0[0]*nv1[1]*nv2[2] + nv0[1]*nv1[2]*nv2[0] - nv0[1]*nv1[0]*nv2[2]; |
65 |
> |
|
66 |
> |
if(dp <= 1e-8 || dp1 >= (1-1e-8)) |
67 |
> |
test = FALSE; |
68 |
> |
else |
69 |
> |
test = TRUE; |
70 |
> |
|
71 |
> |
if(test != test1) |
72 |
> |
fprintf(stderr,"test %f simplified %f\n",dp1,dp); |
73 |
> |
return(test1); |
74 |
|
} |
75 |
|
|
76 |
|
/* calculates the normal of a face contour using Newell's formula. e |
77 |
|
|
78 |
< |
a = SUMi (yi - yi+1)(zi + zi+1) |
78 |
> |
a = SUMi (yi - yi+1)(zi + zi+1); |
79 |
|
b = SUMi (zi - zi+1)(xi + xi+1) |
80 |
|
c = SUMi (xi - xi+1)(yi + yi+1) |
81 |
|
*/ |
92 |
|
|
93 |
|
n[1] = (v0[2] - v1[2]) * (v0[0] + v1[0]) + |
94 |
|
(v1[2] - v2[2]) * (v1[0] + v2[0]) + |
95 |
< |
(v2[2] - v0[2]) * (v2[0] + v0[0]); |
67 |
< |
|
95 |
> |
(v2[2] - v0[2]) * (v2[0] + v0[0]); |
96 |
|
|
97 |
|
n[2] = (v0[1] + v1[1]) * (v0[0] - v1[0]) + |
98 |
|
(v1[1] + v2[1]) * (v1[0] - v2[0]) + |
100 |
|
|
101 |
|
if(!norm) |
102 |
|
return(0); |
75 |
– |
|
103 |
|
|
104 |
|
mag = normalize(n); |
105 |
|
|
107 |
|
} |
108 |
|
|
109 |
|
|
110 |
< |
tri_plane_equation(v0,v1,v2,n,nd,norm) |
111 |
< |
FVECT v0,v1,v2,n; |
112 |
< |
double *nd; |
110 |
> |
tri_plane_equation(v0,v1,v2,peqptr,norm) |
111 |
> |
FVECT v0,v1,v2; |
112 |
> |
FPEQ *peqptr; |
113 |
|
int norm; |
114 |
|
{ |
115 |
< |
tri_normal(v0,v1,v2,n,norm); |
115 |
> |
tri_normal(v0,v1,v2,FP_N(*peqptr),norm); |
116 |
|
|
117 |
< |
*nd = -(DOT(n,v0)); |
117 |
> |
FP_D(*peqptr) = -(DOT(FP_N(*peqptr),v0)); |
118 |
|
} |
119 |
|
|
93 |
– |
/* From quad_edge-code */ |
94 |
– |
int |
95 |
– |
point_in_circle_thru_origin(p,p0,p1) |
96 |
– |
FVECT p; |
97 |
– |
FVECT p0,p1; |
98 |
– |
{ |
120 |
|
|
100 |
– |
double dp0,dp1; |
101 |
– |
double dp,det; |
102 |
– |
|
103 |
– |
dp0 = DOT_VEC2(p0,p0); |
104 |
– |
dp1 = DOT_VEC2(p1,p1); |
105 |
– |
dp = DOT_VEC2(p,p); |
106 |
– |
|
107 |
– |
det = -dp0*CROSS_VEC2(p1,p) + dp1*CROSS_VEC2(p0,p) - dp*CROSS_VEC2(p0,p1); |
108 |
– |
|
109 |
– |
return (det > 0); |
110 |
– |
} |
111 |
– |
|
112 |
– |
|
113 |
– |
|
114 |
– |
point_on_sphere(ps,p,c) |
115 |
– |
FVECT ps,p,c; |
116 |
– |
{ |
117 |
– |
VSUB(ps,p,c); |
118 |
– |
normalize(ps); |
119 |
– |
} |
120 |
– |
|
121 |
– |
|
121 |
|
/* returns TRUE if ray from origin in direction v intersects plane defined |
122 |
|
* by normal plane_n, and plane_d. If plane is not parallel- returns |
123 |
|
* intersection point if r != NULL. If tptr!= NULL returns value of |
124 |
|
* t, if parallel, returns t=FHUGE |
125 |
|
*/ |
126 |
|
int |
127 |
< |
intersect_vector_plane(v,plane_n,plane_d,tptr,r) |
128 |
< |
FVECT v,plane_n; |
129 |
< |
double plane_d; |
127 |
> |
intersect_vector_plane(v,peq,tptr,r) |
128 |
> |
FVECT v; |
129 |
> |
FPEQ peq; |
130 |
|
double *tptr; |
131 |
|
FVECT r; |
132 |
|
{ |
140 |
|
/* line is l = p1 + (p2-p1)t, p1=origin */ |
141 |
|
|
142 |
|
/* Solve for t: */ |
143 |
< |
d = -(DOT(plane_n,v)); |
143 |
> |
d = -(DOT(FP_N(peq),v)); |
144 |
|
if(ZERO(d)) |
145 |
|
{ |
146 |
|
t = FHUGE; |
148 |
|
} |
149 |
|
else |
150 |
|
{ |
151 |
< |
t = plane_d/d; |
151 |
> |
t = FP_D(peq)/d; |
152 |
|
if(t < 0 ) |
153 |
|
hit = 0; |
154 |
|
else |
166 |
|
} |
167 |
|
|
168 |
|
int |
169 |
< |
intersect_ray_plane(orig,dir,plane_n,plane_d,pd,r) |
169 |
> |
intersect_ray_plane(orig,dir,peq,pd,r) |
170 |
|
FVECT orig,dir; |
171 |
< |
FVECT plane_n; |
173 |
< |
double plane_d; |
171 |
> |
FPEQ peq; |
172 |
|
double *pd; |
173 |
|
FVECT r; |
174 |
|
{ |
175 |
< |
double t; |
175 |
> |
double t,d; |
176 |
|
int hit; |
177 |
|
/* |
178 |
|
Plane is Ax + By + Cz +D = 0: |
183 |
|
line is l = p1 + (p2-p1)t |
184 |
|
*/ |
185 |
|
/* Solve for t: */ |
186 |
< |
t = -(DOT(plane_n,orig) + plane_d)/(DOT(plane_n,dir)); |
187 |
< |
if(t < 0) |
186 |
> |
d = DOT(FP_N(peq),dir); |
187 |
> |
if(ZERO(d)) |
188 |
> |
return(0); |
189 |
> |
t = -(DOT(FP_N(peq),orig) + FP_D(peq))/d; |
190 |
> |
|
191 |
> |
if(t < 0) |
192 |
|
hit = 0; |
193 |
|
else |
194 |
|
hit = 1; |
203 |
|
|
204 |
|
|
205 |
|
int |
206 |
< |
intersect_edge_plane(e0,e1,plane_n,plane_d,pd,r) |
207 |
< |
FVECT e0,e1; |
208 |
< |
FVECT plane_n; |
207 |
< |
double plane_d; |
206 |
> |
intersect_ray_oplane(orig,dir,n,pd,r) |
207 |
> |
FVECT orig,dir; |
208 |
> |
FVECT n; |
209 |
|
double *pd; |
210 |
|
FVECT r; |
211 |
|
{ |
212 |
< |
double t; |
212 |
> |
double t,d; |
213 |
|
int hit; |
214 |
< |
FVECT d; |
214 |
< |
/* |
214 |
> |
/* |
215 |
|
Plane is Ax + By + Cz +D = 0: |
216 |
|
plane[0] = A,plane[1] = B,plane[2] = C,plane[3] = D |
217 |
|
*/ |
220 |
|
line is l = p1 + (p2-p1)t |
221 |
|
*/ |
222 |
|
/* Solve for t: */ |
223 |
< |
VSUB(d,e1,e0); |
224 |
< |
t = -(DOT(plane_n,e0) + plane_d)/(DOT(plane_n,d)); |
223 |
> |
d= DOT(n,dir); |
224 |
> |
if(ZERO(d)) |
225 |
> |
return(0); |
226 |
> |
t = -(DOT(n,orig))/d; |
227 |
|
if(t < 0) |
228 |
|
hit = 0; |
229 |
|
else |
230 |
|
hit = 1; |
231 |
|
|
232 |
< |
VSUM(r,e0,d,t); |
232 |
> |
if(r) |
233 |
> |
VSUM(r,orig,dir,t); |
234 |
|
|
235 |
|
if(pd) |
236 |
|
*pd = t; |
237 |
|
return(hit); |
238 |
|
} |
239 |
|
|
240 |
+ |
/* Assumption: know crosses plane:dont need to check for 'on' case */ |
241 |
+ |
intersect_edge_coord_plane(v0,v1,w,r) |
242 |
+ |
FVECT v0,v1; |
243 |
+ |
int w; |
244 |
+ |
FVECT r; |
245 |
+ |
{ |
246 |
+ |
FVECT dv; |
247 |
+ |
int wnext; |
248 |
+ |
double t; |
249 |
|
|
250 |
+ |
VSUB(dv,v1,v0); |
251 |
+ |
t = -v0[w]/dv[w]; |
252 |
+ |
r[w] = 0.0; |
253 |
+ |
wnext = (w+1)%3; |
254 |
+ |
r[wnext] = v0[wnext] + dv[wnext]*t; |
255 |
+ |
wnext = (w+2)%3; |
256 |
+ |
r[wnext] = v0[wnext] + dv[wnext]*t; |
257 |
+ |
} |
258 |
+ |
|
259 |
|
int |
260 |
< |
point_in_cone(p,p0,p1,p2) |
261 |
< |
FVECT p; |
262 |
< |
FVECT p0,p1,p2; |
260 |
> |
intersect_edge_plane(e0,e1,peq,pd,r) |
261 |
> |
FVECT e0,e1; |
262 |
> |
FPEQ peq; |
263 |
> |
double *pd; |
264 |
> |
FVECT r; |
265 |
|
{ |
266 |
< |
FVECT n; |
267 |
< |
FVECT np,x_axis,y_axis; |
268 |
< |
double d1,d2,d; |
269 |
< |
|
270 |
< |
/* Find the equation of the circle defined by the intersection |
271 |
< |
of the cone with the plane defined by p1,p2,p3- project p into |
272 |
< |
that plane and do an in-circle test in the plane |
266 |
> |
double t; |
267 |
> |
int hit; |
268 |
> |
FVECT d; |
269 |
> |
/* |
270 |
> |
Plane is Ax + By + Cz +D = 0: |
271 |
> |
plane[0] = A,plane[1] = B,plane[2] = C,plane[3] = D |
272 |
> |
*/ |
273 |
> |
/* A(orig[0] + dxt) + B(orig[1] + dyt) + C(orig[2] + dzt) + pd = 0 |
274 |
> |
t = -(DOT(plane_n,orig)+ plane_d)/(DOT(plane_n,d)) |
275 |
> |
line is l = p1 + (p2-p1)t |
276 |
|
*/ |
277 |
< |
|
278 |
< |
/* find the equation of the plane defined by p1-p3 */ |
279 |
< |
tri_plane_equation(p0,p1,p2,n,&d,FALSE); |
277 |
> |
/* Solve for t: */ |
278 |
> |
VSUB(d,e1,e0); |
279 |
> |
t = -(DOT(FP_N(peq),e0) + FP_D(peq))/(DOT(FP_N(peq),d)); |
280 |
> |
if(t < 0) |
281 |
> |
hit = 0; |
282 |
> |
else |
283 |
> |
hit = 1; |
284 |
|
|
285 |
< |
/* define a coordinate system on the plane: the x axis is in |
256 |
< |
the direction of np2-np1, and the y axis is calculated from |
257 |
< |
n cross x-axis |
258 |
< |
*/ |
259 |
< |
/* Project p onto the plane */ |
260 |
< |
/* NOTE: check this: does sideness check?*/ |
261 |
< |
if(!intersect_vector_plane(p,n,d,NULL,np)) |
262 |
< |
return(FALSE); |
285 |
> |
VSUM(r,e0,d,t); |
286 |
|
|
287 |
< |
/* create coordinate system on plane: p2-p1 defines the x_axis*/ |
288 |
< |
VSUB(x_axis,p1,p0); |
289 |
< |
normalize(x_axis); |
267 |
< |
/* The y axis is */ |
268 |
< |
VCROSS(y_axis,n,x_axis); |
269 |
< |
normalize(y_axis); |
270 |
< |
|
271 |
< |
VSUB(p1,p1,p0); |
272 |
< |
VSUB(p2,p2,p0); |
273 |
< |
VSUB(np,np,p0); |
274 |
< |
|
275 |
< |
p1[0] = VLEN(p1); |
276 |
< |
p1[1] = 0; |
277 |
< |
|
278 |
< |
d1 = DOT(p2,x_axis); |
279 |
< |
d2 = DOT(p2,y_axis); |
280 |
< |
p2[0] = d1; |
281 |
< |
p2[1] = d2; |
282 |
< |
|
283 |
< |
d1 = DOT(np,x_axis); |
284 |
< |
d2 = DOT(np,y_axis); |
285 |
< |
np[0] = d1; |
286 |
< |
np[1] = d2; |
287 |
< |
|
288 |
< |
/* perform the in-circle test in the new coordinate system */ |
289 |
< |
return(point_in_circle_thru_origin(np,p1,p2)); |
287 |
> |
if(pd) |
288 |
> |
*pd = t; |
289 |
> |
return(hit); |
290 |
|
} |
291 |
|
|
292 |
|
int |
301 |
|
/* Find the normal to the triangle ORIGIN:v0:v1 */ |
302 |
|
if(!NTH_BIT(*nset,0)) |
303 |
|
{ |
304 |
< |
VCROSS(n[0],v1,v0); |
304 |
> |
VCROSS(n[0],v0,v1); |
305 |
|
SET_NTH_BIT(*nset,0); |
306 |
|
} |
307 |
|
/* Test the point for sidedness */ |
319 |
|
/* Test next edge */ |
320 |
|
if(!NTH_BIT(*nset,1)) |
321 |
|
{ |
322 |
< |
VCROSS(n[1],v2,v1); |
322 |
> |
VCROSS(n[1],v1,v2); |
323 |
|
SET_NTH_BIT(*nset,1); |
324 |
|
} |
325 |
|
/* Test the point for sidedness */ |
335 |
|
/* Test next edge */ |
336 |
|
if(!NTH_BIT(*nset,2)) |
337 |
|
{ |
338 |
< |
VCROSS(n[2],v0,v2); |
338 |
> |
VCROSS(n[2],v2,v0); |
339 |
|
SET_NTH_BIT(*nset,2); |
340 |
|
} |
341 |
|
/* Test the point for sidedness */ |
353 |
|
|
354 |
|
|
355 |
|
|
356 |
– |
|
357 |
– |
int |
358 |
– |
point_in_stri(v0,v1,v2,p) |
359 |
– |
FVECT v0,v1,v2,p; |
360 |
– |
{ |
361 |
– |
double d; |
362 |
– |
FVECT n; |
363 |
– |
|
364 |
– |
VCROSS(n,v1,v0); |
365 |
– |
/* Test the point for sidedness */ |
366 |
– |
d = DOT(n,p); |
367 |
– |
if(d > 0.0) |
368 |
– |
return(FALSE); |
369 |
– |
|
370 |
– |
/* Test next edge */ |
371 |
– |
VCROSS(n,v2,v1); |
372 |
– |
/* Test the point for sidedness */ |
373 |
– |
d = DOT(n,p); |
374 |
– |
if(d > 0.0) |
375 |
– |
return(FALSE); |
376 |
– |
|
377 |
– |
/* Test next edge */ |
378 |
– |
VCROSS(n,v0,v2); |
379 |
– |
/* Test the point for sidedness */ |
380 |
– |
d = DOT(n,p); |
381 |
– |
if(d > 0.0) |
382 |
– |
return(FALSE); |
383 |
– |
/* Must be interior to the pyramid */ |
384 |
– |
return(GT_INTERIOR); |
385 |
– |
} |
386 |
– |
|
387 |
– |
int |
388 |
– |
vertices_in_stri(t0,t1,t2,p0,p1,p2,nset,n,avg,pt_sides) |
389 |
– |
FVECT t0,t1,t2,p0,p1,p2; |
390 |
– |
int *nset; |
391 |
– |
FVECT n[3]; |
392 |
– |
FVECT avg; |
393 |
– |
int pt_sides[3][3]; |
394 |
– |
|
395 |
– |
{ |
396 |
– |
int below_plane[3],test; |
397 |
– |
|
398 |
– |
SUM_3VEC3(avg,t0,t1,t2); |
399 |
– |
*nset = 0; |
400 |
– |
/* Test vertex v[i] against triangle j*/ |
401 |
– |
/* Check if v[i] lies below plane defined by avg of 3 vectors |
402 |
– |
defining triangle |
403 |
– |
*/ |
404 |
– |
|
405 |
– |
/* test point 0 */ |
406 |
– |
if(DOT(avg,p0) < 0.0) |
407 |
– |
below_plane[0] = 1; |
408 |
– |
else |
409 |
– |
below_plane[0] = 0; |
410 |
– |
/* Test if b[i] lies in or on triangle a */ |
411 |
– |
test = point_set_in_stri(t0,t1,t2,p0,n,nset,pt_sides[0]); |
412 |
– |
/* If pts[i] is interior: done */ |
413 |
– |
if(!below_plane[0]) |
414 |
– |
{ |
415 |
– |
if(test == GT_INTERIOR) |
416 |
– |
return(TRUE); |
417 |
– |
} |
418 |
– |
/* Now test point 1*/ |
419 |
– |
|
420 |
– |
if(DOT(avg,p1) < 0.0) |
421 |
– |
below_plane[1] = 1; |
422 |
– |
else |
423 |
– |
below_plane[1]=0; |
424 |
– |
/* Test if b[i] lies in or on triangle a */ |
425 |
– |
test = point_set_in_stri(t0,t1,t2,p1,n,nset,pt_sides[1]); |
426 |
– |
/* If pts[i] is interior: done */ |
427 |
– |
if(!below_plane[1]) |
428 |
– |
{ |
429 |
– |
if(test == GT_INTERIOR) |
430 |
– |
return(TRUE); |
431 |
– |
} |
432 |
– |
|
433 |
– |
/* Now test point 2 */ |
434 |
– |
if(DOT(avg,p2) < 0.0) |
435 |
– |
below_plane[2] = 1; |
436 |
– |
else |
437 |
– |
below_plane[2] = 0; |
438 |
– |
/* Test if b[i] lies in or on triangle a */ |
439 |
– |
test = point_set_in_stri(t0,t1,t2,p2,n,nset,pt_sides[2]); |
440 |
– |
|
441 |
– |
/* If pts[i] is interior: done */ |
442 |
– |
if(!below_plane[2]) |
443 |
– |
{ |
444 |
– |
if(test == GT_INTERIOR) |
445 |
– |
return(TRUE); |
446 |
– |
} |
447 |
– |
|
448 |
– |
/* If all three points below separating plane: trivial reject */ |
449 |
– |
if(below_plane[0] && below_plane[1] && below_plane[2]) |
450 |
– |
return(FALSE); |
451 |
– |
/* Now check vertices in a against triangle b */ |
452 |
– |
return(FALSE); |
453 |
– |
} |
454 |
– |
|
455 |
– |
|
356 |
|
set_sidedness_tests(t0,t1,t2,p0,p1,p2,test,sides,nset,n) |
357 |
|
FVECT t0,t1,t2,p0,p1,p2; |
358 |
|
int test[3]; |
369 |
|
if(sides[0][0] == GT_INVALID) |
370 |
|
{ |
371 |
|
if(!NTH_BIT(nset,0)) |
372 |
< |
VCROSS(n[0],t1,t0); |
372 |
> |
VCROSS(n[0],t0,t1); |
373 |
|
/* Test the point for sidedness */ |
374 |
|
d = DOT(n[0],p0); |
375 |
|
if(d >= 0.0) |
382 |
|
if(sides[0][1] == GT_INVALID) |
383 |
|
{ |
384 |
|
if(!NTH_BIT(nset,1)) |
385 |
< |
VCROSS(n[1],t2,t1); |
385 |
> |
VCROSS(n[1],t1,t2); |
386 |
|
/* Test the point for sidedness */ |
387 |
|
d = DOT(n[1],p0); |
388 |
|
if(d >= 0.0) |
395 |
|
if(sides[0][2] == GT_INVALID) |
396 |
|
{ |
397 |
|
if(!NTH_BIT(nset,2)) |
398 |
< |
VCROSS(n[2],t0,t2); |
398 |
> |
VCROSS(n[2],t2,t0); |
399 |
|
/* Test the point for sidedness */ |
400 |
|
d = DOT(n[2],p0); |
401 |
|
if(d >= 0.0) |
411 |
|
if(sides[1][0] == GT_INVALID) |
412 |
|
{ |
413 |
|
if(!NTH_BIT(nset,0)) |
414 |
< |
VCROSS(n[0],t1,t0); |
414 |
> |
VCROSS(n[0],t0,t1); |
415 |
|
/* Test the point for sidedness */ |
416 |
|
d = DOT(n[0],p1); |
417 |
|
if(d >= 0.0) |
425 |
|
if(sides[1][1] == GT_INVALID) |
426 |
|
{ |
427 |
|
if(!NTH_BIT(nset,1)) |
428 |
< |
VCROSS(n[1],t2,t1); |
428 |
> |
VCROSS(n[1],t1,t2); |
429 |
|
/* Test the point for sidedness */ |
430 |
|
d = DOT(n[1],p1); |
431 |
|
if(d >= 0.0) |
439 |
|
if(sides[1][2] == GT_INVALID) |
440 |
|
{ |
441 |
|
if(!NTH_BIT(nset,2)) |
442 |
< |
VCROSS(n[2],t0,t2); |
442 |
> |
VCROSS(n[2],t2,t0); |
443 |
|
/* Test the point for sidedness */ |
444 |
|
d = DOT(n[2],p1); |
445 |
|
if(d >= 0.0) |
455 |
|
if(sides[2][0] == GT_INVALID) |
456 |
|
{ |
457 |
|
if(!NTH_BIT(nset,0)) |
458 |
< |
VCROSS(n[0],t1,t0); |
458 |
> |
VCROSS(n[0],t0,t1); |
459 |
|
/* Test the point for sidedness */ |
460 |
|
d = DOT(n[0],p2); |
461 |
|
if(d >= 0.0) |
468 |
|
if(sides[2][1] == GT_INVALID) |
469 |
|
{ |
470 |
|
if(!NTH_BIT(nset,1)) |
471 |
< |
VCROSS(n[1],t2,t1); |
471 |
> |
VCROSS(n[1],t1,t2); |
472 |
|
/* Test the point for sidedness */ |
473 |
|
d = DOT(n[1],p2); |
474 |
|
if(d >= 0.0) |
481 |
|
if(sides[2][2] == GT_INVALID) |
482 |
|
{ |
483 |
|
if(!NTH_BIT(nset,2)) |
484 |
< |
VCROSS(n[2],t0,t2); |
484 |
> |
VCROSS(n[2],t2,t0); |
485 |
|
/* Test the point for sidedness */ |
486 |
|
d = DOT(n[2],p2); |
487 |
|
if(d >= 0.0) |
492 |
|
SET_NTH_BIT(test[2],2); |
493 |
|
} |
494 |
|
|
495 |
+ |
double |
496 |
+ |
point_on_sphere(ps,p,c) |
497 |
+ |
FVECT ps,p,c; |
498 |
+ |
{ |
499 |
+ |
double d; |
500 |
+ |
VSUB(ps,p,c); |
501 |
+ |
d= normalize(ps); |
502 |
+ |
return(d); |
503 |
+ |
} |
504 |
|
|
505 |
|
int |
506 |
< |
stri_intersect(a1,a2,a3,b1,b2,b3) |
507 |
< |
FVECT a1,a2,a3,b1,b2,b3; |
506 |
> |
point_in_stri(v0,v1,v2,p) |
507 |
> |
FVECT v0,v1,v2,p; |
508 |
|
{ |
509 |
< |
int which,test,n_set[2]; |
510 |
< |
int sides[2][3][3],i,j,inext,jnext; |
602 |
< |
int tests[2][3]; |
603 |
< |
FVECT n[2][3],p,avg[2]; |
604 |
< |
|
605 |
< |
/* Test the vertices of triangle a against the pyramid formed by triangle |
606 |
< |
b and the origin. If any vertex of a is interior to triangle b, or |
607 |
< |
if all 3 vertices of a are ON the edges of b,return TRUE. Remember |
608 |
< |
the results of the edge normal and sidedness tests for later. |
609 |
< |
*/ |
610 |
< |
if(vertices_in_stri(a1,a2,a3,b1,b2,b3,&(n_set[0]),n[0],avg[0],sides[1])) |
611 |
< |
return(TRUE); |
612 |
< |
|
613 |
< |
if(vertices_in_stri(b1,b2,b3,a1,a2,a3,&(n_set[1]),n[1],avg[1],sides[0])) |
614 |
< |
return(TRUE); |
509 |
> |
double d; |
510 |
> |
FVECT n; |
511 |
|
|
512 |
+ |
VCROSS(n,v0,v1); |
513 |
+ |
/* Test the point for sidedness */ |
514 |
+ |
d = DOT(n,p); |
515 |
+ |
if(d > 0.0) |
516 |
+ |
return(FALSE); |
517 |
|
|
518 |
< |
set_sidedness_tests(b1,b2,b3,a1,a2,a3,tests[0],sides[0],n_set[1],n[1]); |
519 |
< |
if(tests[0][0]&tests[0][1]&tests[0][2]) |
520 |
< |
return(FALSE); |
518 |
> |
/* Test next edge */ |
519 |
> |
VCROSS(n,v1,v2); |
520 |
> |
/* Test the point for sidedness */ |
521 |
> |
d = DOT(n,p); |
522 |
> |
if(d > 0.0) |
523 |
> |
return(FALSE); |
524 |
|
|
525 |
< |
set_sidedness_tests(a1,a2,a3,b1,b2,b3,tests[1],sides[1],n_set[0],n[0]); |
526 |
< |
if(tests[1][0]&tests[1][1]&tests[1][2]) |
527 |
< |
return(FALSE); |
528 |
< |
|
529 |
< |
for(j=0; j < 3;j++) |
530 |
< |
{ |
531 |
< |
jnext = (j+1)%3; |
532 |
< |
/* IF edge b doesnt cross any great circles of a, punt */ |
629 |
< |
if(tests[1][j] & tests[1][jnext]) |
630 |
< |
continue; |
631 |
< |
for(i=0;i<3;i++) |
632 |
< |
{ |
633 |
< |
inext = (i+1)%3; |
634 |
< |
/* IF edge a doesnt cross any great circles of b, punt */ |
635 |
< |
if(tests[0][i] & tests[0][inext]) |
636 |
< |
continue; |
637 |
< |
/* Now find the great circles that cross and test */ |
638 |
< |
if((NTH_BIT(tests[0][i],j)^(NTH_BIT(tests[0][inext],j))) |
639 |
< |
&& (NTH_BIT(tests[1][j],i)^NTH_BIT(tests[1][jnext],i))) |
640 |
< |
{ |
641 |
< |
VCROSS(p,n[0][i],n[1][j]); |
642 |
< |
|
643 |
< |
/* If zero cp= done */ |
644 |
< |
if(ZERO_VEC3(p)) |
645 |
< |
continue; |
646 |
< |
/* check above both planes */ |
647 |
< |
if(DOT(avg[0],p) < 0 || DOT(avg[1],p) < 0) |
648 |
< |
{ |
649 |
< |
NEGATE_VEC3(p); |
650 |
< |
if(DOT(avg[0],p) < 0 || DOT(avg[1],p) < 0) |
651 |
< |
continue; |
652 |
< |
} |
653 |
< |
return(TRUE); |
654 |
< |
} |
655 |
< |
} |
656 |
< |
} |
657 |
< |
return(FALSE); |
525 |
> |
/* Test next edge */ |
526 |
> |
VCROSS(n,v2,v0); |
527 |
> |
/* Test the point for sidedness */ |
528 |
> |
d = DOT(n,p); |
529 |
> |
if(d > 0.0) |
530 |
> |
return(FALSE); |
531 |
> |
/* Must be interior to the pyramid */ |
532 |
> |
return(GT_INTERIOR); |
533 |
|
} |
534 |
|
|
535 |
+ |
|
536 |
|
int |
537 |
|
ray_intersect_tri(orig,dir,v0,v1,v2,pt) |
538 |
|
FVECT orig,dir; |
539 |
|
FVECT v0,v1,v2; |
540 |
|
FVECT pt; |
541 |
|
{ |
542 |
< |
FVECT p0,p1,p2,p,n; |
543 |
< |
double pd; |
542 |
> |
FVECT p0,p1,p2,p; |
543 |
> |
FPEQ peq; |
544 |
|
int type; |
545 |
|
|
546 |
< |
point_on_sphere(p0,v0,orig); |
547 |
< |
point_on_sphere(p1,v1,orig); |
548 |
< |
point_on_sphere(p2,v2,orig); |
549 |
< |
|
546 |
> |
VSUB(p0,v0,orig); |
547 |
> |
VSUB(p1,v1,orig); |
548 |
> |
VSUB(p2,v2,orig); |
549 |
> |
|
550 |
|
if(point_in_stri(p0,p1,p2,dir)) |
551 |
|
{ |
552 |
|
/* Intersect the ray with the triangle plane */ |
553 |
< |
tri_plane_equation(v0,v1,v2,n,&pd,FALSE); |
554 |
< |
return(intersect_ray_plane(orig,dir,n,pd,NULL,pt)); |
553 |
> |
tri_plane_equation(v0,v1,v2,&peq,FALSE); |
554 |
> |
return(intersect_ray_plane(orig,dir,peq,NULL,pt)); |
555 |
|
} |
556 |
|
return(FALSE); |
557 |
|
} |
612 |
|
ffar[3][2] = width*nhv[2] - height*nvv[2] + far*ndv[2] + vp[2] ; |
613 |
|
} |
614 |
|
|
739 |
– |
|
740 |
– |
|
741 |
– |
|
615 |
|
int |
616 |
< |
sedge_intersect(a0,a1,b0,b1) |
617 |
< |
FVECT a0,a1,b0,b1; |
616 |
> |
max_index(v,r) |
617 |
> |
FVECT v; |
618 |
> |
double *r; |
619 |
|
{ |
620 |
< |
FVECT na,nb,avga,avgb,p; |
621 |
< |
double d; |
748 |
< |
int sb0,sb1,sa0,sa1; |
620 |
> |
double p[3]; |
621 |
> |
int i; |
622 |
|
|
623 |
< |
/* First test if edge b straddles great circle of a */ |
624 |
< |
VCROSS(na,a0,a1); |
625 |
< |
d = DOT(na,b0); |
626 |
< |
sb0 = ZERO(d)?0:(d<0)? -1: 1; |
627 |
< |
d = DOT(na,b1); |
628 |
< |
sb1 = ZERO(d)?0:(d<0)? -1: 1; |
629 |
< |
/* edge b entirely on one side of great circle a: edges cannot intersect*/ |
630 |
< |
if(sb0*sb1 > 0) |
758 |
< |
return(FALSE); |
759 |
< |
/* test if edge a straddles great circle of b */ |
760 |
< |
VCROSS(nb,b0,b1); |
761 |
< |
d = DOT(nb,a0); |
762 |
< |
sa0 = ZERO(d)?0:(d<0)? -1: 1; |
763 |
< |
d = DOT(nb,a1); |
764 |
< |
sa1 = ZERO(d)?0:(d<0)? -1: 1; |
765 |
< |
/* edge a entirely on one side of great circle b: edges cannot intersect*/ |
766 |
< |
if(sa0*sa1 > 0) |
767 |
< |
return(FALSE); |
623 |
> |
p[0] = fabs(v[0]); |
624 |
> |
p[1] = fabs(v[1]); |
625 |
> |
p[2] = fabs(v[2]); |
626 |
> |
i = (p[0]>=p[1])?((p[0]>=p[2])?0:2):((p[1]>=p[2])?1:2); |
627 |
> |
if(r) |
628 |
> |
*r = p[i]; |
629 |
> |
return(i); |
630 |
> |
} |
631 |
|
|
632 |
< |
/* Find one of intersection points of the great circles */ |
633 |
< |
VCROSS(p,na,nb); |
634 |
< |
/* If they lie on same great circle: call an intersection */ |
635 |
< |
if(ZERO_VEC3(p)) |
636 |
< |
return(TRUE); |
637 |
< |
|
638 |
< |
VADD(avga,a0,a1); |
639 |
< |
VADD(avgb,b0,b1); |
640 |
< |
if(DOT(avga,p) < 0 || DOT(avgb,p) < 0) |
632 |
> |
int |
633 |
> |
closest_point_in_tri(p0,p1,p2,p,p0id,p1id,p2id) |
634 |
> |
FVECT p0,p1,p2,p; |
635 |
> |
int p0id,p1id,p2id; |
636 |
> |
{ |
637 |
> |
double d,d1; |
638 |
> |
int i; |
639 |
> |
|
640 |
> |
d = DIST_SQ(p,p0); |
641 |
> |
d1 = DIST_SQ(p,p1); |
642 |
> |
if(d < d1) |
643 |
|
{ |
644 |
< |
NEGATE_VEC3(p); |
645 |
< |
if(DOT(avga,p) < 0 || DOT(avgb,p) < 0) |
781 |
< |
return(FALSE); |
644 |
> |
d1 = DIST_SQ(p,p2); |
645 |
> |
i = (d1 < d)?p2id:p0id; |
646 |
|
} |
647 |
< |
if((!sb0 || !sb1) && (!sa0 || !sa1)) |
648 |
< |
return(FALSE); |
649 |
< |
return(TRUE); |
647 |
> |
else |
648 |
> |
{ |
649 |
> |
d = DIST_SQ(p,p2); |
650 |
> |
i = (d < d1)? p2id:p1id; |
651 |
> |
} |
652 |
> |
return(i); |
653 |
|
} |
654 |
|
|
788 |
– |
|
789 |
– |
|
655 |
|
/* Find the normalized barycentric coordinates of p relative to |
656 |
|
* triangle v0,v1,v2. Return result in coord |
657 |
|
*/ |
665 |
|
a = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1); |
666 |
|
coord[0] = ((x2 - px) * (y3 - py) - (x3 - px) * (y2 - py)) / a; |
667 |
|
coord[1] = ((x3 - px) * (y1 - py) - (x1 - px) * (y3 - py)) / a; |
668 |
< |
coord[2] = 1.0 - coord[0] - coord[1]; |
668 |
> |
coord[2] = ((x1 - px) * (y2 - py) - (x2 - px) * (y1 - py)) / a; |
669 |
|
|
670 |
|
} |
671 |
|
|
807 |
– |
bary_ith_child(coord,i) |
808 |
– |
double coord[3]; |
809 |
– |
int i; |
810 |
– |
{ |
811 |
– |
|
812 |
– |
switch(i){ |
813 |
– |
case 0: |
814 |
– |
/* update bary for child */ |
815 |
– |
coord[0] = 2.0*coord[0]- 1.0; |
816 |
– |
coord[1] *= 2.0; |
817 |
– |
coord[2] *= 2.0; |
818 |
– |
break; |
819 |
– |
case 1: |
820 |
– |
coord[0] *= 2.0; |
821 |
– |
coord[1] = 2.0*coord[1]- 1.0; |
822 |
– |
coord[2] *= 2.0; |
823 |
– |
break; |
824 |
– |
case 2: |
825 |
– |
coord[0] *= 2.0; |
826 |
– |
coord[1] *= 2.0; |
827 |
– |
coord[2] = 2.0*coord[2]- 1.0; |
828 |
– |
break; |
829 |
– |
case 3: |
830 |
– |
coord[0] = 1.0 - 2.0*coord[0]; |
831 |
– |
coord[1] = 1.0 - 2.0*coord[1]; |
832 |
– |
coord[2] = 1.0 - 2.0*coord[2]; |
833 |
– |
break; |
834 |
– |
#ifdef DEBUG |
835 |
– |
default: |
836 |
– |
eputs("bary_ith_child():Invalid child\n"); |
837 |
– |
break; |
838 |
– |
#endif |
839 |
– |
} |
840 |
– |
} |
672 |
|
|
673 |
|
|
843 |
– |
int |
844 |
– |
bary_child(coord) |
845 |
– |
double coord[3]; |
846 |
– |
{ |
847 |
– |
int i; |
674 |
|
|
849 |
– |
if(coord[0] > 0.5) |
850 |
– |
{ |
851 |
– |
/* update bary for child */ |
852 |
– |
coord[0] = 2.0*coord[0]- 1.0; |
853 |
– |
coord[1] *= 2.0; |
854 |
– |
coord[2] *= 2.0; |
855 |
– |
return(0); |
856 |
– |
} |
857 |
– |
else |
858 |
– |
if(coord[1] > 0.5) |
859 |
– |
{ |
860 |
– |
coord[0] *= 2.0; |
861 |
– |
coord[1] = 2.0*coord[1]- 1.0; |
862 |
– |
coord[2] *= 2.0; |
863 |
– |
return(1); |
864 |
– |
} |
865 |
– |
else |
866 |
– |
if(coord[2] > 0.5) |
867 |
– |
{ |
868 |
– |
coord[0] *= 2.0; |
869 |
– |
coord[1] *= 2.0; |
870 |
– |
coord[2] = 2.0*coord[2]- 1.0; |
871 |
– |
return(2); |
872 |
– |
} |
873 |
– |
else |
874 |
– |
{ |
875 |
– |
coord[0] = 1.0 - 2.0*coord[0]; |
876 |
– |
coord[1] = 1.0 - 2.0*coord[1]; |
877 |
– |
coord[2] = 1.0 - 2.0*coord[2]; |
878 |
– |
return(3); |
879 |
– |
} |
880 |
– |
} |
881 |
– |
|
882 |
– |
/* Coord was the ith child of the parent: set the coordinate |
883 |
– |
relative to the parent |
884 |
– |
*/ |
675 |
|
bary_parent(coord,i) |
676 |
< |
double coord[3]; |
676 |
> |
BCOORD coord[3]; |
677 |
|
int i; |
678 |
|
{ |
889 |
– |
|
679 |
|
switch(i) { |
680 |
|
case 0: |
681 |
|
/* update bary for child */ |
682 |
< |
coord[0] = coord[0]*0.5 + 0.5; |
683 |
< |
coord[1] *= 0.5; |
684 |
< |
coord[2] *= 0.5; |
682 |
> |
coord[0] = (coord[0] >> 1) + MAXBCOORD4; |
683 |
> |
coord[1] >>= 1; |
684 |
> |
coord[2] >>= 1; |
685 |
|
break; |
686 |
|
case 1: |
687 |
< |
coord[0] *= 0.5; |
688 |
< |
coord[1] = coord[1]*0.5 + 0.5; |
689 |
< |
coord[2] *= 0.5; |
687 |
> |
coord[0] >>= 1; |
688 |
> |
coord[1] = (coord[1] >> 1) + MAXBCOORD4; |
689 |
> |
coord[2] >>= 1; |
690 |
|
break; |
691 |
|
|
692 |
|
case 2: |
693 |
< |
coord[0] *= 0.5; |
694 |
< |
coord[1] *= 0.5; |
695 |
< |
coord[2] = coord[2]*0.5 + 0.5; |
693 |
> |
coord[0] >>= 1; |
694 |
> |
coord[1] >>= 1; |
695 |
> |
coord[2] = (coord[2] >> 1) + MAXBCOORD4; |
696 |
|
break; |
697 |
|
|
698 |
|
case 3: |
699 |
< |
coord[0] = 0.5 - 0.5*coord[0]; |
700 |
< |
coord[1] = 0.5 - 0.5*coord[1]; |
701 |
< |
coord[2] = 0.5 - 0.5*coord[2]; |
699 |
> |
coord[0] = MAXBCOORD4 - (coord[0] >> 1); |
700 |
> |
coord[1] = MAXBCOORD4 - (coord[1] >> 1); |
701 |
> |
coord[2] = MAXBCOORD4 - (coord[2] >> 1); |
702 |
|
break; |
703 |
|
#ifdef DEBUG |
704 |
|
default: |
709 |
|
} |
710 |
|
|
711 |
|
bary_from_child(coord,child,next) |
712 |
< |
double coord[3]; |
712 |
> |
BCOORD coord[3]; |
713 |
|
int child,next; |
714 |
|
{ |
715 |
|
#ifdef DEBUG |
729 |
|
|
730 |
|
switch(child){ |
731 |
|
case 0: |
732 |
< |
switch(next){ |
733 |
< |
case 1: |
734 |
< |
coord[0] += 1.0; |
946 |
< |
coord[1] -= 1.0; |
732 |
> |
coord[0] = 0; |
733 |
> |
coord[1] = MAXBCOORD2 - coord[1]; |
734 |
> |
coord[2] = MAXBCOORD2 - coord[2]; |
735 |
|
break; |
948 |
– |
case 2: |
949 |
– |
coord[0] += 1.0; |
950 |
– |
coord[2] -= 1.0; |
951 |
– |
break; |
952 |
– |
case 3: |
953 |
– |
coord[0] *= -1.0; |
954 |
– |
coord[1] = 1 - coord[1]; |
955 |
– |
coord[2] = 1 - coord[2]; |
956 |
– |
break; |
957 |
– |
|
958 |
– |
} |
959 |
– |
break; |
736 |
|
case 1: |
737 |
< |
switch(next){ |
738 |
< |
case 0: |
739 |
< |
coord[0] -= 1.0; |
964 |
< |
coord[1] += 1.0; |
737 |
> |
coord[0] = MAXBCOORD2 - coord[0]; |
738 |
> |
coord[1] = 0; |
739 |
> |
coord[2] = MAXBCOORD2 - coord[2]; |
740 |
|
break; |
966 |
– |
case 2: |
967 |
– |
coord[1] += 1.0; |
968 |
– |
coord[2] -= 1.0; |
969 |
– |
break; |
970 |
– |
case 3: |
971 |
– |
coord[0] = 1 - coord[0]; |
972 |
– |
coord[1] *= -1.0; |
973 |
– |
coord[2] = 1 - coord[2]; |
974 |
– |
break; |
975 |
– |
} |
976 |
– |
break; |
741 |
|
case 2: |
742 |
< |
switch(next){ |
743 |
< |
case 0: |
744 |
< |
coord[0] -= 1.0; |
981 |
< |
coord[2] += 1.0; |
982 |
< |
break; |
983 |
< |
case 1: |
984 |
< |
coord[1] -= 1.0; |
985 |
< |
coord[2] += 1.0; |
986 |
< |
break; |
987 |
< |
case 3: |
988 |
< |
coord[0] = 1 - coord[0]; |
989 |
< |
coord[1] = 1 - coord[1]; |
990 |
< |
coord[2] *= -1.0; |
991 |
< |
break; |
992 |
< |
} |
742 |
> |
coord[0] = MAXBCOORD2 - coord[0]; |
743 |
> |
coord[1] = MAXBCOORD2 - coord[1]; |
744 |
> |
coord[2] = 0; |
745 |
|
break; |
746 |
|
case 3: |
747 |
|
switch(next){ |
748 |
|
case 0: |
749 |
< |
coord[0] *= -1.0; |
750 |
< |
coord[1] = 1 - coord[1]; |
751 |
< |
coord[2] = 1 - coord[2]; |
749 |
> |
coord[0] = 0; |
750 |
> |
coord[1] = MAXBCOORD2 - coord[1]; |
751 |
> |
coord[2] = MAXBCOORD2 - coord[2]; |
752 |
|
break; |
753 |
|
case 1: |
754 |
< |
coord[0] = 1 - coord[0]; |
755 |
< |
coord[1] *= -1.0; |
756 |
< |
coord[2] = 1 - coord[2]; |
754 |
> |
coord[0] = MAXBCOORD2 - coord[0]; |
755 |
> |
coord[1] = 0; |
756 |
> |
coord[2] = MAXBCOORD2 - coord[2]; |
757 |
|
break; |
758 |
|
case 2: |
759 |
< |
coord[0] = 1 - coord[0]; |
760 |
< |
coord[1] = 1 - coord[1]; |
761 |
< |
coord[2] *= -1.0; |
759 |
> |
coord[0] = MAXBCOORD2 - coord[0]; |
760 |
> |
coord[1] = MAXBCOORD2 - coord[1]; |
761 |
> |
coord[2] = 0; |
762 |
|
break; |
763 |
|
} |
764 |
|
break; |
766 |
|
} |
767 |
|
|
768 |
|
int |
769 |
< |
max_index(v) |
770 |
< |
FVECT v; |
769 |
> |
bary_child(coord) |
770 |
> |
BCOORD coord[3]; |
771 |
|
{ |
1020 |
– |
double a,b,c; |
772 |
|
int i; |
773 |
|
|
774 |
< |
a = fabs(v[0]); |
775 |
< |
b = fabs(v[1]); |
776 |
< |
c = fabs(v[2]); |
777 |
< |
i = (a>=b)?((a>=c)?0:2):((b>=c)?1:2); |
778 |
< |
return(i); |
779 |
< |
} |
780 |
< |
|
1030 |
< |
|
1031 |
< |
|
1032 |
< |
/* |
1033 |
< |
* int |
1034 |
< |
* traceRay(FVECT orig, FVECT dir,FVECT v0,FVECT v1,FVECT v2,FVECT r) |
1035 |
< |
* |
1036 |
< |
* Intersect the ray with triangle v0v1v2, return intersection point in r |
1037 |
< |
* |
1038 |
< |
* Assumes orig,v0,v1,v2 are in spherical coordinates, and orig is |
1039 |
< |
* unit |
1040 |
< |
*/ |
1041 |
< |
int |
1042 |
< |
traceRay(orig,dir,v0,v1,v2,r) |
1043 |
< |
FVECT orig,dir; |
1044 |
< |
FVECT v0,v1,v2; |
1045 |
< |
FVECT r; |
1046 |
< |
{ |
1047 |
< |
FVECT n,p[3],d; |
1048 |
< |
double pt[3],r_eps; |
1049 |
< |
int i; |
1050 |
< |
int which; |
1051 |
< |
|
1052 |
< |
/* Find the plane equation for the triangle defined by the edge v0v1 and |
1053 |
< |
the view center*/ |
1054 |
< |
VCROSS(n,v0,v1); |
1055 |
< |
/* Intersect the ray with this plane */ |
1056 |
< |
i = intersect_ray_plane(orig,dir,n,0.0,&(pt[0]),p[0]); |
1057 |
< |
if(i) |
1058 |
< |
which = 0; |
1059 |
< |
else |
1060 |
< |
which = -1; |
1061 |
< |
|
1062 |
< |
VCROSS(n,v1,v2); |
1063 |
< |
i = intersect_ray_plane(orig,dir,n,0.0,&(pt[1]),p[1]); |
1064 |
< |
if(i) |
1065 |
< |
if((which==-1) || pt[1] < pt[0]) |
1066 |
< |
which = 1; |
1067 |
< |
|
1068 |
< |
VCROSS(n,v2,v0); |
1069 |
< |
i = intersect_ray_plane(orig,dir,n,0.0,&(pt[2]),p[2]); |
1070 |
< |
if(i) |
1071 |
< |
if((which==-1) || pt[2] < pt[which]) |
1072 |
< |
which = 2; |
1073 |
< |
|
1074 |
< |
if(which != -1) |
1075 |
< |
{ |
1076 |
< |
/* Return point that is K*eps along projection of the ray on |
1077 |
< |
the sphere to push intersection point p[which] into next cell |
1078 |
< |
*/ |
1079 |
< |
normalize(p[which]); |
1080 |
< |
/* Calculate the ray perpendicular to the intersection point: approx |
1081 |
< |
the direction moved along the sphere a distance of K*epsilon*/ |
1082 |
< |
r_eps = -DOT(p[which],dir); |
1083 |
< |
VSUM(n,dir,p[which],r_eps); |
1084 |
< |
/* Calculate the length along ray p[which]-dir needed to move to |
1085 |
< |
cause a move along the sphere of k*epsilon |
1086 |
< |
*/ |
1087 |
< |
r_eps = DOT(n,dir); |
1088 |
< |
VSUM(r,p[which],dir,(20*FTINY)/r_eps); |
1089 |
< |
normalize(r); |
1090 |
< |
return(TRUE); |
774 |
> |
if(coord[0] > MAXBCOORD4) |
775 |
> |
{ |
776 |
> |
/* update bary for child */ |
777 |
> |
coord[0] = (coord[0]<< 1) - MAXBCOORD2; |
778 |
> |
coord[1] <<= 1; |
779 |
> |
coord[2] <<= 1; |
780 |
> |
return(0); |
781 |
|
} |
782 |
|
else |
783 |
< |
{ |
1094 |
< |
/* Unable to find intersection: move along ray and try again */ |
1095 |
< |
r_eps = -DOT(orig,dir); |
1096 |
< |
VSUM(n,dir,orig,r_eps); |
1097 |
< |
r_eps = DOT(n,dir); |
1098 |
< |
VSUM(r,orig,dir,(20*FTINY)/r_eps); |
1099 |
< |
normalize(r); |
1100 |
< |
#ifdef DEBUG |
1101 |
< |
eputs("traceRay:Ray does not intersect triangle\n"); |
1102 |
< |
#endif |
1103 |
< |
return(FALSE); |
1104 |
< |
} |
1105 |
< |
} |
1106 |
< |
|
1107 |
< |
|
1108 |
< |
int |
1109 |
< |
closest_point_in_tri(p0,p1,p2,p,p0id,p1id,p2id) |
1110 |
< |
FVECT p0,p1,p2,p; |
1111 |
< |
int p0id,p1id,p2id; |
1112 |
< |
{ |
1113 |
< |
double d,d1; |
1114 |
< |
int i; |
1115 |
< |
|
1116 |
< |
d = DIST_SQ(p,p0); |
1117 |
< |
d1 = DIST_SQ(p,p1); |
1118 |
< |
if(d < d1) |
783 |
> |
if(coord[1] > MAXBCOORD4) |
784 |
|
{ |
785 |
< |
d1 = DIST_SQ(p,p2); |
786 |
< |
i = (d1 < d)?p2id:p0id; |
785 |
> |
coord[0] <<= 1; |
786 |
> |
coord[1] = (coord[1] << 1) - MAXBCOORD2; |
787 |
> |
coord[2] <<= 1; |
788 |
> |
return(1); |
789 |
|
} |
790 |
|
else |
791 |
< |
{ |
792 |
< |
d = DIST_SQ(p,p2); |
793 |
< |
i = (d < d1)? p2id:p1id; |
794 |
< |
} |
795 |
< |
return(i); |
791 |
> |
if(coord[2] > MAXBCOORD4) |
792 |
> |
{ |
793 |
> |
coord[0] <<= 1; |
794 |
> |
coord[1] <<= 1; |
795 |
> |
coord[2] = (coord[2] << 1) - MAXBCOORD2; |
796 |
> |
return(2); |
797 |
> |
} |
798 |
> |
else |
799 |
> |
{ |
800 |
> |
coord[0] = MAXBCOORD2 - (coord[0] << 1); |
801 |
> |
coord[1] = MAXBCOORD2 - (coord[1] << 1); |
802 |
> |
coord[2] = MAXBCOORD2 - (coord[2] << 1); |
803 |
> |
return(3); |
804 |
> |
} |
805 |
|
} |
806 |
|
|
807 |
+ |
int |
808 |
+ |
bary_nth_child(coord,i) |
809 |
+ |
BCOORD coord[3]; |
810 |
+ |
int i; |
811 |
+ |
{ |
812 |
|
|
813 |
< |
|
814 |
< |
|
813 |
> |
switch(i){ |
814 |
> |
case 0: |
815 |
> |
/* update bary for child */ |
816 |
> |
coord[0] = (coord[0]<< 1) - MAXBCOORD2; |
817 |
> |
coord[1] <<= 1; |
818 |
> |
coord[2] <<= 1; |
819 |
> |
break; |
820 |
> |
case 1: |
821 |
> |
coord[0] <<= 1; |
822 |
> |
coord[1] = (coord[1] << 1) - MAXBCOORD2; |
823 |
> |
coord[2] <<= 1; |
824 |
> |
break; |
825 |
> |
case 2: |
826 |
> |
coord[0] <<= 1; |
827 |
> |
coord[1] <<= 1; |
828 |
> |
coord[2] = (coord[2] << 1) - MAXBCOORD2; |
829 |
> |
break; |
830 |
> |
case 3: |
831 |
> |
coord[0] = MAXBCOORD2 - (coord[0] << 1); |
832 |
> |
coord[1] = MAXBCOORD2 - (coord[1] << 1); |
833 |
> |
coord[2] = MAXBCOORD2 - (coord[2] << 1); |
834 |
> |
break; |
835 |
> |
} |
836 |
> |
} |
837 |
|
|
838 |
|
|
839 |
|
|