--- ray/src/hd/sm_qtree.c 1998/08/25 11:03:27 3.3 +++ ray/src/hd/sm_qtree.c 1999/01/05 16:52:39 3.10 @@ -14,16 +14,24 @@ static char SCCSid[] = "$SunId$ SGI"; */ #include "standard.h" - +#include "sm_flag.h" #include "sm_geom.h" #include "sm_qtree.h" -#include "object.h" QUADTREE *quad_block[QT_MAX_BLK]; /* our quadtree */ static QUADTREE quad_free_list = EMPTY; /* freed octree nodes */ static QUADTREE treetop = 0; /* next free node */ -int4 *quad_flag; +int4 *quad_flag= NULL; +#ifdef TEST_DRIVER +extern FVECT Pick_v0[500],Pick_v1[500],Pick_v2[500]; +extern int Pick_cnt,Pick_tri,Pick_samp; +extern FVECT Pick_point[500]; +extern int Pick_q[500]; + +#endif +int Incnt=0; + QUADTREE qtAlloc() /* allocate a quadtree */ { @@ -41,11 +49,13 @@ qtAlloc() /* allocate a quadtree */ return(EMPTY); if ((quad_block[QT_BLOCK(freet)] = (QUADTREE *)malloc( QT_BLOCK_SIZE*4*sizeof(QUADTREE))) == NULL) - return(EMPTY); + error(SYSTEM,"qtAlloc(): Unable to allocate memory\n"); + + /* Realloc the per/node flags */ quad_flag = (int4 *)realloc((char *)quad_flag, - (QT_BLOCK(freet)+1)*QT_BLOCK_SIZE/(8*sizeof(int4))); + (QT_BLOCK(freet)+1)*((QT_BLOCK_SIZE+7)>>3)); if (quad_flag == NULL) - return(EMPTY); + error(SYSTEM,"qtAlloc(): Unable to allocate memory\n"); } treetop += 4; return(freet); @@ -54,12 +64,15 @@ qtAlloc() /* allocate a quadtree */ qtClearAllFlags() /* clear all quadtree branch flags */ { - if (!treetop) return; - bzero((char *)quad_flag, - (QT_BLOCK(treetop-1)+1)*QT_BLOCK_SIZE/(8*sizeof(int4))); + if (!treetop) + return; + + /* Clear the node flags*/ + bzero((char *)quad_flag, (QT_BLOCK(treetop-4)+1)*((QT_BLOCK_SIZE+7)>>3)); + /* Clear set flags */ + qtclearsetflags(); } - qtFree(qt) /* free a quadtree */ register QUADTREE qt; { @@ -80,7 +93,8 @@ qtFree(qt) /* free a quadtree */ qtDone() /* free EVERYTHING */ { register int i; - + + qtfreeleaves(); for (i = 0; i < QT_MAX_BLK; i++) { if (quad_block[i] == NULL) @@ -88,674 +102,1099 @@ qtDone() /* free EVERYTHING */ free((char *)quad_block[i]); quad_block[i] = NULL; } + /* Free the flags */ if (i) free((char *)quad_flag); quad_flag = NULL; quad_free_list = EMPTY; treetop = 0; } - QUADTREE -qtCompress(qt) /* recursively combine nodes */ -register QUADTREE qt; +qtLocate(qt,bcoord) +QUADTREE qt; +BCOORD bcoord[3]; { - register int i; - register QUADTREE qres; + int i; - if (!QT_IS_TREE(qt)) /* not a tree */ - return(qt); - qres = QT_NTH_CHILD(qt,0) = qtCompress(QT_NTH_CHILD(qt,0)); - for (i = 1; i < 4; i++) - if((QT_NTH_CHILD(qt,i) = qtCompress(QT_NTH_CHILD(qt,i))) != qres) - qres = qt; - if(!QT_IS_TREE(qres)) - { /* all were identical leaves */ - QT_NTH_CHILD(qt,0) = quad_free_list; - quad_free_list = qt; + if(QT_IS_TREE(qt)) + { + i = bary_child(bcoord); + + return(qtLocate(QT_NTH_CHILD(qt,i),bcoord)); + } + else + return(qt); +} + +int +move_to_nbr(b,db0,db1,db2,tptr) +BCOORD b[3]; +BDIR db0,db1,db2; +double *tptr; +{ + double t,dt; + BCOORD bc; + int nbr; + + nbr = -1; + *tptr = 0.0; + /* Advance to next node */ + if(b[0]==0 && db0 < 0) + return(0); + if(b[1]==0 && db1 < 0) + return(1); + if(b[2]==0 && db2 < 0) + return(2); + if(db0 < 0) + { + t = ((double)b[0])/-db0; + nbr = 0; + } + else + t = MAXFLOAT; + if(db1 < 0) + { + dt = ((double)b[1])/-db1; + if( dt < t) + { + t = dt; + nbr = 1; } - return(qres); + } + if(db2 < 0) + { + dt = ((double)b[2])/-db2; + if( dt < t) + { + t = dt; + nbr = 2; + } + } + *tptr = t; + return(nbr); } - -QUADTREE -*qtLocate_leaf(qtptr,bcoord,t0,t1,t2) -QUADTREE *qtptr; -double bcoord[3]; -FVECT t0,t1,t2; +qtTrace_ray(qt,b,db0,db1,db2,nextptr,sign,sfactor,func,f) + QUADTREE qt; + BCOORD b[3]; + BDIR db0,db1,db2; + int *nextptr; + int sign,sfactor; + FUNC func; + int *f; { - int i; - QUADTREE *child; - FVECT a,b,c; + int i,found; + QUADTREE child; + int nbr,next,w; + double t; - if(QT_IS_TREE(*qtptr)) - { - i = bary2d_child(bcoord); - child = QT_NTH_CHILD_PTR(*qtptr,i); - if(t0) + if(QT_IS_TREE(qt)) + { + /* Find the appropriate child and reset the coord */ + i = bary_child(b); + + for(;;) { - qtSubdivide_tri(t0,t1,t2,a,b,c); - qtNth_child_tri(t0,t1,t2,a,b,c,i,t0,t1,t2); + child = QT_NTH_CHILD(qt,i); + if(i != 3) + qtTrace_ray(child,b,db0,db1,db2,nextptr,sign,sfactor+1,func,f); + else + /* If the center cell- must flip direction signs */ + qtTrace_ray(child,b,-db0,-db1,-db2,nextptr,1-sign,sfactor+1,func,f); + + if(QT_FLAG_IS_DONE(*f)) + return; + /* If in same block: traverse */ + if(i==3) + next = *nextptr; + else + if(*nextptr == i) + next = 3; + else + { + /* reset the barycentric coordinates in the parents*/ + bary_parent(b,i); + /* Else pop up to parent and traverse from there */ + return(qt); + } + bary_from_child(b,i,next); + i = next; } - return(qtLocate_leaf(child,bcoord,t0,t1,t2)); } else - return(qtptr); -} + { +#ifdef TEST_DRIVER + if(Pick_cnt < 500) + Pick_q[Pick_cnt++]=qt; +#endif; + F_FUNC(func)(qt,F_ARGS(func),f); + if(QT_FLAG_IS_DONE(*f)) + return; + /* Advance to next node */ + nbr = move_to_nbr(b,db0,db1,db2,&t); + if(nbr==-1) + { + QT_FLAG_SET_DONE(*f); + return; + } + b[0] += (BCOORD)(t *db0); + b[1] += (BCOORD)(t *db1); + b[2] += (BCOORD)(t *db2); + *nextptr = nbr; + return; + + } +} -int -qtLeaf_add_tri_from_pt(qtptr,bcoord,id,v0,v1,v2,n) -QUADTREE *qtptr; -double bcoord[3]; -int id; -FVECT v0,v1,v2; + + + + + + +#define TEST_INT(tl,th,d,q0,q1,h,l) \ + tl=d>q0;th=d> 1) | (s0 << 2 & 4))); + /* See if edge can be trivially rejected from intersetion testing */ + test_t0t1 = !(((s0 & 6)==0) || ((s1 & 6)==0)|| ((s2 & 6)==0) || + ((sq0 & 6)==6) ||((sq1 & 6)==6)|| ((sq2 & 6)==6)); + bl=bh=0; + if(test_t0t1 && (e0 & 2) ) + { + /* Must do double calculation to avoid overflow */ + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) } - else - { - /* If this leave node emptry- create a new set */ - if(QT_IS_EMPTY(*qtptr)) - *qtptr = qtaddelem(*qtptr,id); - else - { - qtgetset(os,*qtptr); - /* If the set is too large: subdivide */ - if(QT_SET_CNT(os) < QT_SET_THRESHOLD) - *qtptr = qtaddelem(*qtptr,id); - else - { - if (n < QT_MAX_LEVELS) - { - /* If set size exceeds threshold: subdivide cell and - reinsert set tris into cell - */ - n++; - qtfreeleaf(*qtptr); - qtSubdivide(qtptr); - QT_SET_FLAG(*qtptr); - found = qtLeaf_add_tri_from_pt(qtptr,bcoord,id,v0,v1,v2,n); -#if 0 - if(!found) - { -#ifdef TEST_DRIVER - HANDLE_ERROR("qtAdd_tri():Found in parent but not children\n"); -#else - eputs("qtAdd_tri():Found in parent but not children\n"); -#endif - } -#endif - for(optr = &(os[1]),i = QT_SET_CNT(os); i > 0; i--) - { - id = QT_SET_NEXT_ELEM(optr); - qtTri_verts_from_id(id,r0,r1,r2); - found= qtLeaf_add_tri_from_pt(qtptr,bcoord,id,v0,v1,v2,++n); -#ifdef DEBUG - if(!found) - eputs("qtAdd_tri():Reinsert-in parent but not children\n"); -#endif - } - } - else - if(QT_SET_CNT(os) < QT_MAX_SET) - { - *qtptr = qtaddelem(*qtptr,id); - } - else - { -#ifdef DEBUG - eputs("qtAdd_tri():two many levels\n"); -#endif - return(FALSE); - } - } - } + test_t1t2= !(((s0 & 3)==0) || ((s1 & 3)==0)|| ((s2 & 3)==0) || + ((sq0 & 3)==3) ||((sq1 & 3)==3)|| ((sq2 & 3)==3)); + if(test_t1t2 && (e0 & 1)) + { /* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) } - return(TRUE); + test_t2t0 = !(((s0 & 5)==0) || ((s1 & 5)==0)|| ((s2 & 5)==0) || + ((sq0 & 5)==5) ||((sq1 & 5)==5)|| ((sq2 & 5)==5)); + if(test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + e1 = (s1 ^ ((s1 >> 1) | (s1 << 2 & 4))); + cl = ch = 0; + if(test_t0t1 && (e1 & 2)) + {/* test t0t1 against b */ + db = t0[2] + dt10[2]*((double)(b-t0[1]))/dt10[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + if(test_t1t2 && (e1 & 1)) + {/* test t1t2 against b */ + db = t1[2] + dt21[2]*((double)(q0[1] - t1[1]))/dt21[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + if(test_t2t0 && (e1 & 4)) + {/* test t2t0 against b */ + db = t2[2] + dt02[2]*((double)(q0[1] - t2[1]))/dt02[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + + /* test edges against c */ + e2 = (s2 ^ ((s2 >> 1) | (s2 << 2 & 4))); + al = ah = 0; + if(test_t0t1 && (e2 & 2)) + { /* test t0t1 against c */ + db = t0[0] + dt10[0]*((double)(c-t0[2]))/dt10[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + if(test_t1t2 && (e2 & 1)) + { + db = t1[0] + dt21[0]*((double)(c - t1[2]))/dt21[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + if(test_t2t0 && (e2 & 4)) + { /* test t2t0 against c */ + db = t2[0] + dt02[0]*((double)(c - t2[2]))/dt02[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + /* Only remaining case is if some edge trivially rejected */ + if(!e0 || !e1 || !e2) + return(qt); + + /* Only one/none got tested - pick either of other two/any two */ + /* Only need to test one edge */ + if(!test_t0t1 && (e0 & 2)) + { + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + if(!test_t1t2 && (e0 & 1)) + {/* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + if(!test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + + return(qt); + +Lfunc_call: + qt = f.func(f.argptr,root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,0,f,n); + return(qt); + } -int -qtAdd_tri_from_point(qtptr,v0,v1,v2,pt,id) -QUADTREE *qtptr; -FVECT v0,v1,v2; -FVECT pt; -int id; -{ - char d,w; - int i,x,y; - QUADTREE *child; - QUADTREE qt; - FVECT i_pt,n,a,b,c,r0,r1,r2; - double pd,bcoord[3]; - OBJECT os[MAXSET+1],*optr; - int found; - - /* Determine if point lies within pyramid (and therefore - inside a spherical quadtree cell):GT_INTERIOR, on one of the - pyramid sides (and on cell edge):GT_EDGE(1,2 or 3), - or on pyramid vertex (and on cell vertex):GT_VERTEX(1,2, or 3). - For each triangle edge: compare the - point against the plane formed by the edge and the view center - */ - d = test_single_point_against_spherical_tri(v0,v1,v2,pt,&w); - /* Not in this triangle */ - if(!d) - return(FALSE); +/* Leaf node: Do definitive test */ +QUADTREE +qtLeaf_insert_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale, s0,s1,s2,sq0,sq1,sq2,f,n) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +unsigned int scale,s0,s1,s2,sq0,sq1,sq2; +FUNC f; +int n; +{ + double db; + unsigned int e0,e1,e2; + BCOORD a,b,c; + double p0[2], p1[2],cp; + char al,ah,bl,bh,cl,ch; + char testl,testh,test_t0t1,test_t1t2,test_t2t0; + unsigned int ls0,ls1,ls2; + + /* May have gotten passed trivial reject if one/two vertices are ON */ + a = q1[0];b= q0[1]; c= q0[2]; + SIDES_LESS(t0,t1,t2,ls0,ls1,ls2,a,b,c); + + /* First check if can trivial accept: if vertex in cell */ + if(ls0 & ls1 & ls2) + goto Lfunc_call; - /* Will return lowest level triangle containing point: It the - point is on an edge or vertex: will return first associated - triangle encountered in the child traversal- the others can - be derived using triangle adjacency information - */ - if(QT_IS_TREE(*qtptr)) - { - QT_SET_FLAG(*qtptr); - /* Find the intersection point */ - tri_plane_equation(v0,v1,v2,n,&pd,FALSE); - intersect_vector_plane(pt,n,pd,NULL,i_pt); + if(ls0==0 || ls1 == 0 || ls2 ==0) + return(qt); + /* Assumption: Could not trivial reject*/ + /* IF any coords lie on edge- must be in if couldnt reject */ - i = max_index(n); - x = (i+1)%3; - y = (i+2)%3; - /* Calculate barycentric coordinates of i_pt */ - bary2d(v0[x],v0[y],v1[x],v1[y],v2[x],v2[y],i_pt[x],i_pt[y],bcoord); + if(t0[0]== a || t0[1] == b || t0[2] == c) + goto Lfunc_call; + if(t1[0]== a || t1[1] == b || t1[2] == c) + goto Lfunc_call; + if(t2[0]== a || t2[1] == b || t2[2] == c) + goto Lfunc_call; - i = bary2d_child(bcoord); - child = QT_NTH_CHILD_PTR(*qtptr,i); - /* NOTE: Optimize: only subdivide for specified child */ - qtSubdivide_tri(v0,v1,v2,a,b,c); - qtNth_child_tri(v0,v1,v2,a,b,c,i,v0,v1,v2); - return(qtLeaf_add_tri_from_pt(child,bcoord,id,v0,v1,v2,1)); - } - else - { - /* If this leave node emptry- create a new set */ - if(QT_IS_EMPTY(*qtptr)) - *qtptr = qtaddelem(*qtptr,id); - else - { - qtgetset(os,*qtptr); - /* If the set is too large: subdivide */ - if(QT_SET_CNT(os) < QT_SET_THRESHOLD) - *qtptr = qtaddelem(*qtptr,id); - else - { - /* If set size exceeds threshold: subdivide cell and - reinsert set tris into cell - */ - qtfreeleaf(*qtptr); - qtSubdivide(qtptr); - found = qtLeaf_add_tri_from_pt(qtptr,bcoord,id,v0,v1,v2,1); -#if 0 - if(!found) - { -#ifdef TEST_DRIVER - HANDLE_ERROR("qtAdd_tri():Found in parent but not children\n"); -#else - eputs("qtAdd_tri():Found in parent but not children\n"); -#endif - } -#endif - for(optr = &(os[1]),i = QT_SET_CNT(os); i > 0; i--) - { - id = QT_SET_NEXT_ELEM(optr); - qtTri_verts_from_id(id,r0,r1,r2); - found=qtAdd_tri(qtptr,id,r0,r1,r2,v0,v1,v2,1); -#ifdef DEBUG - if(!found) - eputs("qtAdd_tri():Reinsert-in parent but not children\n"); -#endif - } - } - } + /* Test for edge crossings */ + /* Test t0t1 against a,b,c */ + /* First test if t0t1 can be trivially rejected */ + /* If both edges are outside bounds- dont need to test */ + + /* Test t0t1,t1t2,t2t0 against a */ + test_t0t1 = !(((ls0 & 6)==0) || ((ls1 & 6)==0)|| ((ls2 & 6)==0) || + ((sq0 & 6)==0) ||((sq1 & 6)==0)|| ((sq2 & 6)==0)); + e0 = (ls0 ^ ((ls0 >> 1) | (ls0 << 2 & 4))); + bl=bh=0; + /* Test t0t1,t1t2,t2t0 against a */ + if(test_t0t1 && (e0 & 2) ) + { + db = t0[1] + dt10[1]*((double)(a-t0[0])/dt10[0]); + TEST_INT(testl,testh,db,q1[1],b,bl,bh) } - return(TRUE); -} + test_t1t2= !(((ls0 & 3)==0) || ((ls1 & 3)==0)|| ((ls2 & 3)==0) || + ((sq0 & 3)==0) ||((sq1 & 3)==0)|| ((sq2 & 3)==0)); + if(test_t1t2 && (e0 & 1)) + { /* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + test_t2t0 = !(((ls0 & 5)==0) || ((ls1 & 5)==0)|| ((ls2 & 5)==0) || + ((sq0 & 5)==0) ||((sq1 & 5)==0)|| ((sq2 & 5)==0)); + if(test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + cl = ch = 0; + e1 = (ls1 ^ ((ls1 >> 1) | (ls1 << 2 & 4))); + if(test_t0t1 && (e1 & 2)) + {/* test t0t1 against b */ + db = t0[2] + dt10[2]*(((double)(b-t0[1]))/dt10[1]); + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + if(test_t1t2 && (e1 & 1)) + {/* test t1t2 against b */ + db = t1[2] + dt21[2]*((double)(b - t1[1]))/dt21[1]; + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + if(test_t2t0 && (e1 & 4)) + {/* test t2t0 against b */ + db = t2[2] + dt02[2]*((double)(b - t2[1]))/dt02[1]; + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + al = ah = 0; + e2 = (ls2 ^ ((ls2 >> 1) | (ls2 << 2 & 4))); + if(test_t0t1 && (e2 & 2)) + { /* test t0t1 against c */ + db = t0[0] + dt10[0]*(((double)(c-t0[2]))/dt10[2]); + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + if(test_t1t2 && (e2 & 1)) + { + db = t1[0] + dt21[0]*((double)(c - t1[2]))/dt21[2]; + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + if(test_t2t0 && (e2 & 4)) + { /* test t2t0 against c */ + db = t2[0] + dt02[0]*((double)(c - t2[2]))/dt02[2]; + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + /* Only remaining case is if some edge trivially rejected */ + if(!e0 || !e1 || !e2) + return(qt); + /* Only one/none got tested - pick either of other two/any two */ + /* Only need to test one edge */ + if(!test_t0t1 && (e0 & 2)) + { + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + if(!test_t1t2 && (e0 & 1)) + {/* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + if(!test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } -QUADTREE -*qtRoot_point_locate(qtptr,v0,v1,v2,pt,t0,t1,t2) -QUADTREE *qtptr; -FVECT v0,v1,v2; -FVECT pt; -FVECT t0,t1,t2; -{ - char d,w; - int i,x,y; - QUADTREE *child; - QUADTREE qt; - FVECT n,i_pt,a,b,c; - double pd,bcoord[3]; + return(qt); +Lfunc_call: - /* Determine if point lies within pyramid (and therefore - inside a spherical quadtree cell):GT_INTERIOR, on one of the - pyramid sides (and on cell edge):GT_EDGE(1,2 or 3), - or on pyramid vertex (and on cell vertex):GT_VERTEX(1,2, or 3). - For each triangle edge: compare the - point against the plane formed by the edge and the view center - */ - d = test_single_point_against_spherical_tri(v0,v1,v2,pt,&w); + qt = f.func(f.argptr,root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,1,f,n); + return(qt); + } - /* Not in this triangle */ - if(!d) - { - return(NULL); - } - /* Will return lowest level triangle containing point: It the - point is on an edge or vertex: will return first associated - triangle encountered in the child traversal- the others can - be derived using triangle adjacency information - */ - if(QT_IS_TREE(*qtptr)) - { - /* Find the intersection point */ - tri_plane_equation(v0,v1,v2,n,&pd,FALSE); - intersect_vector_plane(pt,n,pd,NULL,i_pt); - i = max_index(n); - x = (i+1)%3; - y = (i+2)%3; - /* Calculate barycentric coordinates of i_pt */ - bary2d(v0[x],v0[y],v1[x],v1[y],v2[x],v2[y],i_pt[x],i_pt[y],bcoord); +/* ASSUMPTION: that triangle t0,t1,t2 intersects quad cell q0,q1,q2 */ - i = bary2d_child(bcoord); - child = QT_NTH_CHILD_PTR(*qtptr,i); - if(t0) - { - qtSubdivide_tri(v0,v1,v2,a,b,c); - qtNth_child_tri(v0,v1,v2,a,b,c,i,t0,t1,t2); - } - return(qtLocate_leaf(child,bcoord,t0,t1,t2)); - } - else - return(qtptr); -} +/*-------q2--------- sq2 + / \ +s1 /sc \ s0 + qb_____qa + / \ / \ +\sq0/sa \ /sb \ /sq1 + \ q0____qc____q1/ + \ / + \ s2 / +*/ -int -qtPoint_in_tri(qtptr,v0,v1,v2,pt,type,which) -QUADTREE *qtptr; -FVECT v0,v1,v2; -FVECT pt; -char *type,*which; +int Find_id=0; + +QUADTREE +qtInsert_tri(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,f,n) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +BCOORD scale; +unsigned int s0,s1,s2,sq0,sq1,sq2; +FUNC f; +int n; { - OBJECT os[MAXSET+1],*optr; - char d,w; - int i,id; - FVECT p0,p1,p2; + BCOORD a,b,c; + BCOORD va[3],vb[3],vc[3]; + unsigned int sa,sb,sc; - qtptr = qtRoot_point_locate(qtptr,v0,v1,v2,pt,NULL,NULL,NULL); + /* If a tree: trivial reject and recurse on potential children */ + if(QT_IS_TREE(qt)) + { + /* Test against new a edge: if entirely to left: only need + to visit child 0 + */ + a = q1[0] + scale; + b = q0[1] + scale; + c = q0[2] + scale; - if(!qtptr || QT_IS_EMPTY(*qtptr)) - return(EMPTY); - - /* Get the set */ - qtgetset(os,*qtptr); - for (i = QT_SET_CNT(os),optr = QT_SET_PTR(os); i > 0; i--) + SIDES_GTR(t0,t1,t2,sa,sb,sc,a,b,c); + + if(sa==7) { - /* Find the triangle that pt falls in (NOTE:FOR now return first 1) */ - id = QT_SET_NEXT_ELEM(optr); - qtTri_verts_from_id(id,p0,p1,p2); - d = test_single_point_against_spherical_tri(p0,p1,p2,pt,&w); - if(d) - { - if(type) - *type = d; - if(which) - *which = w; - return(id); - } + vb[1] = q0[1]; + vc[2] = q0[2]; + vc[1] = b; + vb[2] = c; + vb[0] = vc[0] = a; + QT_NTH_CHILD(qt,0) = qtInsert_tri(root,QT_NTH_CHILD(qt,0),q0,vc, + vb,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,s1,s2,sq0,sb,sc,f,n+1); + return(qt); } - return(EMPTY); -} + if(sb==7) + { + va[0] = q1[0]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = c; + vc[0] = a; + QT_NTH_CHILD(qt,1) = qtInsert_tri(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f,n+1); + return(qt); + } + if(sc==7) + { + va[0] = q1[0]; + vb[1] = q0[1]; + va[1] = b; + va[2] = vb[2] = c; + vb[0] = a; + QT_NTH_CHILD(qt,2) = qtInsert_tri(root,QT_NTH_CHILD(qt,2),vb,va, + q2,t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f,n+1); + return(qt); + } -QUADTREE -qtSubdivide(qtptr) -QUADTREE *qtptr; -{ - QUADTREE node; - node = qtAlloc(); - QT_CLEAR_CHILDREN(node); - *qtptr = node; - return(node); + va[0] = q1[0]; + vb[1] = q0[1]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = vb[2] = c; + vb[0] = vc[0] = a; + /* If outside of all edges: only need to Visit 3 */ + if(sa==0 && sb==0 && sc==0) + { + QT_NTH_CHILD(qt,3) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,3),va,vb, + vc,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,sb,sc,s0,s1,s2,f,n+1); + return(qt); + } + + if(sa) + QT_NTH_CHILD(qt,0) = qtInsert_tri(root,QT_NTH_CHILD(qt,0),q0,vc,vb,t0, + t1,t2,dt10,dt21,dt02,scale>>1,sa,s1,s2,sq0,sb,sc,f,n+1); + if(sb) + QT_NTH_CHILD(qt,1) = qtInsert_tri(root,QT_NTH_CHILD(qt,1),vc,q1,va,t0, + t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f,n+1); + if(sc) + QT_NTH_CHILD(qt,2) = qtInsert_tri(root,QT_NTH_CHILD(qt,2),vb,va,q2,t0, + t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f,n+1); + QT_NTH_CHILD(qt,3) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,3),va,vb,vc,t0, + t1,t2,dt10,dt21,dt02,scale>>1,sa,sb,sc,s0,s1,s2,f,n+1); + return(qt); + } + /* Leaf node: Do definitive test */ + else + return(qt = qtLeaf_insert_tri(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale,s0,s1,s2,sq0,sq1,sq2,f,n)); } QUADTREE -qtSubdivide_nth_child(qt,n) +qtInsert_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,f,n) +int root; QUADTREE qt; -int n; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +BCOORD scale; +unsigned int s0,s1,s2,sq0,sq1,sq2; +FUNC f; { - QUADTREE node; + BCOORD a,b,c; + BCOORD va[3],vb[3],vc[3]; + unsigned int sa,sb,sc; - node = qtSubdivide(&(QT_NTH_CHILD(qt,n))); - - return(node); -} + /* If a tree: trivial reject and recurse on potential children */ + if(QT_IS_TREE(qt)) + { + /* Test against new a edge: if entirely to left: only need + to visit child 0 + */ + a = q1[0] - scale; + b = q0[1] - scale; + c = q0[2] - scale; -/* for triangle v0-v1-v2- returns a,b,c: children are: + SIDES_GTR(t0,t1,t2,sa,sb,sc,a,b,c); - v2 0: v0,a,c - /\ 1: a,v1,b - /2 \ 2: c,b,v2 - c/____\b 3: b,c,a - /\ /\ - /0 \3 /1 \ - v0____\/____\v1 - a - */ + if(sa==0) + { + vb[1] = q0[1]; + vc[2] = q0[2]; + vc[1] = b; + vb[2] = c; + vb[0] = vc[0] = a; -qtSubdivide_tri(v0,v1,v2,a,b,c) -FVECT v0,v1,v2; -FVECT a,b,c; -{ - EDGE_MIDPOINT_VEC3(a,v0,v1); - EDGE_MIDPOINT_VEC3(b,v1,v2); - EDGE_MIDPOINT_VEC3(c,v2,v0); -} + QT_NTH_CHILD(qt,0) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,0),q0,vc, + vb,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,s1,s2,sq0,sb,sc,f,n+1); + return(qt); + } + if(sb==0) + { + va[0] = q1[0]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = c; + vc[0] = a; + QT_NTH_CHILD(qt,1) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f,n+1); + return(qt); + } + if(sc==0) + { + va[0] = q1[0]; + vb[1] = q0[1]; + va[1] = b; + va[2] = vb[2] = c; + vb[0] = a; + QT_NTH_CHILD(qt,2) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,2),vb,va, + q2,t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f,n+1); + return(qt); + } + va[0] = q1[0]; + vb[1] = q0[1]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = vb[2] = c; + vb[0] = vc[0] = a; + /* If outside of all edges: only need to Visit 3 */ + if(sa==7 && sb==7 && sc==7) + { + QT_NTH_CHILD(qt,3) = qtInsert_tri(root,QT_NTH_CHILD(qt,3),va,vb, + vc,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,sb,sc,s0,s1,s2,f,n+1); + return(qt); + } + if(sa!=7) + QT_NTH_CHILD(qt,0) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,0),q0,vc,vb, + t0,t1,t2,dt10,dt21,dt02,scale>>1,sa,s1,s2,sq0,sb,sc,f,n+1); + if(sb!=7) + QT_NTH_CHILD(qt,1) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f,n+1); + if(sc!=7) + QT_NTH_CHILD(qt,2) = qtInsert_tri_rev(root,QT_NTH_CHILD(qt,2),vb,va,q2, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f,n+1); -qtNth_child_tri(v0,v1,v2,a,b,c,i,r0,r1,r2) -FVECT v0,v1,v2; -FVECT a,b,c; -int i; -FVECT r0,r1,r2; -{ - switch(i){ - case 0: - VCOPY(r0,v0); VCOPY(r1,a); VCOPY(r2,c); - break; - case 1: - VCOPY(r0,a); VCOPY(r1,v1); VCOPY(r2,b); - break; - case 2: - VCOPY(r0,c); VCOPY(r1,b); VCOPY(r2,v2); - break; - case 3: - VCOPY(r0,b); VCOPY(r1,c); VCOPY(r2,a); - break; + QT_NTH_CHILD(qt,3) = qtInsert_tri(root,QT_NTH_CHILD(qt,3),va,vb,vc,t0,t1, + t2,dt10,dt21,dt02,scale>>1,sa,sb,sc,s0,s1,s2,f,n+1); + return(qt); } + /* Leaf node: Do definitive test */ + else + return(qt = qtLeaf_insert_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale,s0,s1,s2,sq0,sq1,sq2,f,n)); } -/* Add triangle "id" to all leaf level cells that are children of -quadtree pointed to by "qtptr" with cell vertices "t1,t2,t3" -that it overlaps (vertex and edge adjacencies do not count -as overlapping). If the addition of the triangle causes the cell to go over -threshold- the cell is split- and the triangle must be recursively inserted -into the new child cells: it is assumed that "v1,v2,v3" are normalized -*/ -int -qtRoot_add_tri(qtptr,id,t0,t1,t2,v0,v1,v2,n) -QUADTREE *qtptr; -int id; -FVECT t0,t1,t2; -FVECT v0,v1,v2; -int n; -{ - char test; - int found; - test = spherical_tri_intersect(t0,t1,t2,v0,v1,v2); - if(!test) - return(FALSE); - - found = qtAdd_tri(qtptr,id,t0,t1,t2,v0,v1,v2,n); - return(found); -} -int -qtRoot_add_tri_from_point(qtptr,id,t0,t1,t2,v0,v1,v2,n) -QUADTREE *qtptr; -int id; -FVECT t0,t1,t2; -FVECT v0,v1,v2; -int n; -{ - char test; - int found; +/*************************************************************************/ +/* Visit code for applying functions: NOTE THIS IS THE SAME AS INSERT CODE: + except sets flags: wanted insert to be as efficient as possible: so + broke into two sets of routines +*/ - test = spherical_tri_intersect(t0,t1,t2,v0,v1,v2); - if(!test) - return(FALSE); - - found = qtAdd_tri_from_point(qtptr,id,t0,t1,t2,v0,v1,v2,n); - return(found); -} - -int -qtAdd_tri(qtptr,id,t0,t1,t2,v0,v1,v2,n) -QUADTREE *qtptr; -int id; -FVECT t0,t1,t2; -FVECT v0,v1,v2; -int n; +qtVisit_tri(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,f) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +BCOORD scale; +unsigned int s0,s1,s2,sq0,sq1,sq2; +FUNC f; { - - char test; - int i,index; - FVECT a,b,c; - OBJECT os[MAXSET+1],*optr; - QUADTREE qt; - int found; - FVECT r0,r1,r2; + BCOORD a,b,c; + BCOORD va[3],vb[3],vc[3]; + unsigned int sa,sb,sc; - found = 0; - /* if this is tree: recurse */ - if(QT_IS_TREE(*qtptr)) + /* If a tree: trivial reject and recurse on potential children */ + if(QT_IS_TREE(qt)) { - n++; - qtSubdivide_tri(v0,v1,v2,a,b,c); - test = spherical_tri_intersect(t0,t1,t2,v0,a,c); - if(test) - found |= qtAdd_tri(QT_NTH_CHILD_PTR(*qtptr,0),id,t0,t1,t2,v0,a,c,n); - test = spherical_tri_intersect(t0,t1,t2,a,v1,b); - if(test) - found |= qtAdd_tri(QT_NTH_CHILD_PTR(*qtptr,1),id,t0,t1,t2,a,v1,b,n); - test = spherical_tri_intersect(t0,t1,t2,c,b,v2); - if(test) - found |= qtAdd_tri(QT_NTH_CHILD_PTR(*qtptr,2),id,t0,t1,t2,c,b,v2,n); - test = spherical_tri_intersect(t0,t1,t2,b,c,a); - if(test) - found |= qtAdd_tri(QT_NTH_CHILD_PTR(*qtptr,3),id,t0,t1,t2,b,c,a,n); + QT_SET_FLAG(qt); -#if 0 - if(!found) + /* Test against new a edge: if entirely to left: only need + to visit child 0 + */ + a = q1[0] + scale; + b = q0[1] + scale; + c = q0[2] + scale; + + SIDES_GTR(t0,t1,t2,sa,sb,sc,a,b,c); + + if(sa==7) { -#ifdef TEST_DRIVER - HANDLE_ERROR("qtAdd_tri():Found in parent but not children\n"); -#else - eputs("qtAdd_tri():Found in parent but not children\n"); -#endif + vb[1] = q0[1]; + vc[2] = q0[2]; + vc[1] = b; + vb[2] = c; + vb[0] = vc[0] = a; + qtVisit_tri(root,QT_NTH_CHILD(qt,0),q0,vc, + vb,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,s1,s2,sq0,sb,sc,f); + return; } -#endif + if(sb==7) + { + va[0] = q1[0]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = c; + vc[0] = a; + qtVisit_tri(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f); + return; + } + if(sc==7) + { + va[0] = q1[0]; + vb[1] = q0[1]; + va[1] = b; + va[2] = vb[2] = c; + vb[0] = a; + qtVisit_tri(root,QT_NTH_CHILD(qt,2),vb,va, + q2,t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f); + return; + } + + va[0] = q1[0]; + vb[1] = q0[1]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = vb[2] = c; + vb[0] = vc[0] = a; + /* If outside of all edges: only need to Visit 3 */ + if(sa==0 && sb==0 && sc==0) + { + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,3),va,vb, + vc,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,sb,sc,s0,s1,s2,f); + return; + } + + if(sa) + qtVisit_tri(root,QT_NTH_CHILD(qt,0),q0,vc,vb,t0, + t1,t2,dt10,dt21,dt02,scale>>1,sa,s1,s2,sq0,sb,sc,f); + if(sb) + qtVisit_tri(root,QT_NTH_CHILD(qt,1),vc,q1,va,t0, + t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f); + if(sc) + qtVisit_tri(root,QT_NTH_CHILD(qt,2),vb,va,q2,t0, + t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f); + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,3),va,vb,vc,t0, + t1,t2,dt10,dt21,dt02,scale>>1,sa,sb,sc,s0,s1,s2,f); } + /* Leaf node: Do definitive test */ else - { - /* If this leave node emptry- create a new set */ - if(QT_IS_EMPTY(*qtptr)) - *qtptr = qtaddelem(*qtptr,id); - else - { - qtgetset(os,*qtptr); - /* If the set is too large: subdivide */ - if(QT_SET_CNT(os) < QT_SET_THRESHOLD) - *qtptr = qtaddelem(*qtptr,id); - else - { - if (n < QT_MAX_LEVELS) - { - /* If set size exceeds threshold: subdivide cell and - reinsert set tris into cell - */ - n++; - qtfreeleaf(*qtptr); - qtSubdivide(qtptr); - found = qtAdd_tri(qtptr,id,t0,t1,t2,v0,v1,v2,n); -#if 0 - if(!found) - { -#ifdef TEST_DRIVER - HANDLE_ERROR("qtAdd_tri():Found in parent but not children\n"); -#else - eputs("qtAdd_tri():Found in parent but not children\n"); -#endif - } -#endif - for(optr = &(os[1]),i = QT_SET_CNT(os); i > 0; i--) - { - id = QT_SET_NEXT_ELEM(optr); - qtTri_verts_from_id(id,r0,r1,r2); - found=qtAdd_tri(qtptr,id,r0,r1,r2,v0,v1,v2,n); -#ifdef DEBUG - if(!found) - eputs("qtAdd_tri():Reinsert-in parent but not children\n"); -#endif - } - } - else - if(QT_SET_CNT(os) < QT_MAX_SET) - { - *qtptr = qtaddelem(*qtptr,id); -#if 0 - { - int k; - qtgetset(os,*qtptr); - printf("\n%d:\n",os[0]); - for(k=1; k <= os[0];k++) - printf("%d ",os[k]); - printf("\n"); - } -#endif - /* - insertelem(os,id); - *qtptr = fullnode(os); - */ - } - else - { -#ifdef DEBUG - eputs("qtAdd_tri():two many levels\n"); -#endif - return(FALSE); - } - } - } - } - return(TRUE); + qtLeaf_visit_tri(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale,s0,s1,s2,sq0,sq1,sq2,f); + } -int -qtApply_to_tri_cells(qtptr,t0,t1,t2,v0,v1,v2,func,arg) -QUADTREE *qtptr; -FVECT t0,t1,t2; -FVECT v0,v1,v2; -int (*func)(); -char *arg; +qtVisit_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02,scale, + s0,s1,s2,sq0,sq1,sq2,f) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +BCOORD scale; +unsigned int s0,s1,s2,sq0,sq1,sq2; +FUNC f; { - char test; - FVECT a,b,c; + BCOORD a,b,c; + BCOORD va[3],vb[3],vc[3]; + unsigned int sa,sb,sc; - /* test if triangle (t0,t1,t2) overlaps cell triangle (v0,v1,v2) */ - test = spherical_tri_intersect(t0,t1,t2,v0,v1,v2); + /* If a tree: trivial reject and recurse on potential children */ + if(QT_IS_TREE(qt)) + { + QT_SET_FLAG(qt); + /* Test against new a edge: if entirely to left: only need + to visit child 0 + */ + a = q1[0] - scale; + b = q0[1] - scale; + c = q0[2] - scale; - /* If triangles do not overlap: done */ - if(!test) - return(FALSE); + SIDES_GTR(t0,t1,t2,sa,sb,sc,a,b,c); - /* if this is tree: recurse */ - if(QT_IS_TREE(*qtptr)) - { - qtSubdivide_tri(v0,v1,v2,a,b,c); - qtApply_to_tri_cells(QT_NTH_CHILD_PTR(*qtptr,0),t0,t1,t2,v0,a,c,func,arg); - qtApply_to_tri_cells(QT_NTH_CHILD_PTR(*qtptr,1),t0,t1,t2,a,v1,b,func,arg); - qtApply_to_tri_cells(QT_NTH_CHILD_PTR(*qtptr,2),t0,t1,t2,c,b,v2,func,arg); - qtApply_to_tri_cells(QT_NTH_CHILD_PTR(*qtptr,3),t0,t1,t2,b,c,a,func,arg); + if(sa==0) + { + vb[1] = q0[1]; + vc[2] = q0[2]; + vc[1] = b; + vb[2] = c; + vb[0] = vc[0] = a; + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,0),q0,vc, + vb,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,s1,s2,sq0,sb,sc,f); + return; + } + if(sb==0) + { + va[0] = q1[0]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = c; + vc[0] = a; + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f); + return; + } + if(sc==0) + { + va[0] = q1[0]; + vb[1] = q0[1]; + va[1] = b; + va[2] = vb[2] = c; + vb[0] = a; + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,2),vb,va, + q2,t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f); + return; + } + va[0] = q1[0]; + vb[1] = q0[1]; + vc[2] = q0[2]; + va[1] = vc[1] = b; + va[2] = vb[2] = c; + vb[0] = vc[0] = a; + /* If outside of all edges: only need to Visit 3 */ + if(sa==7 && sb==7 && sc==7) + { + qtVisit_tri(root,QT_NTH_CHILD(qt,3),va,vb, + vc,t0,t1,t2,dt10,dt21,dt02, scale>>1,sa,sb,sc,s0,s1,s2,f); + return; + } + if(sa!=7) + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,0),q0,vc,vb, + t0,t1,t2,dt10,dt21,dt02,scale>>1,sa,s1,s2,sq0,sb,sc,f); + if(sb!=7) + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,1),vc,q1,va, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,sb,s2,sa,sq1,sc,f); + if(sc!=7) + qtVisit_tri_rev(root,QT_NTH_CHILD(qt,2),vb,va,q2, + t0,t1,t2,dt10,dt21,dt02,scale>>1,s0,s1,sc,sa,sb,sq2,f); + + qtVisit_tri(root,QT_NTH_CHILD(qt,3),va,vb,vc,t0,t1, + t2,dt10,dt21,dt02,scale>>1,sa,sb,sc,s0,s1,s2,f); + return; } + /* Leaf node: Do definitive test */ else - return(func(qtptr,arg)); + qtLeaf_visit_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale,s0,s1,s2,sq0,sq1,sq2,f); } -int -qtRemove_tri(qtptr,id,t0,t1,t2,v0,v1,v2) -QUADTREE *qtptr; -int id; -FVECT t0,t1,t2; -FVECT v0,v1,v2; -{ - - char test; - int i; - FVECT a,b,c; - OBJECT os[MAXSET+1]; - - /* test if triangle (t0,t1,t2) overlaps cell triangle (v0,v1,v2) */ - test = spherical_tri_intersect(t0,t1,t2,v0,v1,v2); - /* If triangles do not overlap: done */ - if(!test) - return(FALSE); +qtLeaf_visit_tri(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale, s0,s1,s2,sq0,sq1,sq2,f) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +unsigned int scale,s0,s1,s2,sq0,sq1,sq2; +FUNC f; +{ + double db; + unsigned int e0,e1,e2; + char al,ah,bl,bh,cl,ch,testl,testh; + char test_t0t1,test_t1t2,test_t2t0; + BCOORD a,b,c; - /* if this is tree: recurse */ - if(QT_IS_TREE(*qtptr)) + /* First check if can trivial accept: if vertex in cell */ + if(s0 & s1 & s2) + goto Lfunc_call; + + /* Assumption: Could not trivial reject*/ + /* IF any coords lie on edge- must be in if couldnt reject */ + a = q1[0];b= q0[1]; c= q0[2]; + if(t0[0]== a || t0[1] == b || t0[2] == c) + goto Lfunc_call; + if(t1[0]== a || t1[1] == b || t1[2] == c) + goto Lfunc_call; + if(t2[0]== a || t2[1] == b || t2[2] == c) + goto Lfunc_call; + + /* Test for edge crossings */ + /* Test t0t1,t1t2,t2t0 against a */ + /* Calculate edge crossings */ + e0 = (s0 ^ ((s0 >> 1) | (s0 << 2 & 4))); + /* See if edge can be trivially rejected from intersetion testing */ + test_t0t1 = !(((s0 & 6)==0) || ((s1 & 6)==0)|| ((s2 & 6)==0) || + ((sq0 & 6)==6) ||((sq1 & 6)==6)|| ((sq2 & 6)==6)); + bl=bh=0; + if(test_t0t1 && (e0 & 2) ) { - qtSubdivide_tri(v0,v1,v2,a,b,c); - qtRemove_tri(QT_NTH_CHILD_PTR(*qtptr,0),id,t0,t1,t2,v0,a,c); - qtRemove_tri(QT_NTH_CHILD_PTR(*qtptr,1),id,t0,t1,t2,a,v1,b); - qtRemove_tri(QT_NTH_CHILD_PTR(*qtptr,2),id,t0,t1,t2,c,b,v2); - qtRemove_tri(QT_NTH_CHILD_PTR(*qtptr,3),id,t0,t1,t2,b,c,a); + /* Must do double calculation to avoid overflow */ + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) } - else + test_t1t2= !(((s0 & 3)==0) || ((s1 & 3)==0)|| ((s2 & 3)==0) || + ((sq0 & 3)==3) ||((sq1 & 3)==3)|| ((sq2 & 3)==3)); + if(test_t1t2 && (e0 & 1)) + { /* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + test_t2t0 = !(((s0 & 5)==0) || ((s1 & 5)==0)|| ((s2 & 5)==0) || + ((sq0 & 5)==5) ||((sq1 & 5)==5)|| ((sq2 & 5)==5)); + if(test_t2t0 && (e0 & 4)) { - if(QT_IS_EMPTY(*qtptr)) - { -#ifdef DEBUG - eputs("qtRemove_tri(): triangle not found\n"); -#endif - } - /* remove id from set */ - else - { - qtgetset(os,*qtptr); - if(!inset(os,id)) - { -#ifdef DEBUG - eputs("qtRemove_tri(): tri not in set\n"); -#endif - } - else - { - *qtptr = qtdelelem(*qtptr,id); - } - } + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) } - return(TRUE); + e1 = (s1 ^ ((s1 >> 1) | (s1 << 2 & 4))); + cl = ch = 0; + if(test_t0t1 && (e1 & 2)) + {/* test t0t1 against b */ + db = t0[2] + dt10[2]*((double)(b-t0[1]))/dt10[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + if(test_t1t2 && (e1 & 1)) + {/* test t1t2 against b */ + db = t1[2] + dt21[2]*((double)(q0[1] - t1[1]))/dt21[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + if(test_t2t0 && (e1 & 4)) + {/* test t2t0 against b */ + db = t2[2] + dt02[2]*((double)(q0[1] - t2[1]))/dt02[1]; + TEST_INT(testl,testh,db,c,q2[2],cl,ch) + } + + /* test edges against c */ + e2 = (s2 ^ ((s2 >> 1) | (s2 << 2 & 4))); + al = ah = 0; + if(test_t0t1 && (e2 & 2)) + { /* test t0t1 against c */ + db = t0[0] + dt10[0]*((double)(c-t0[2]))/dt10[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + if(test_t1t2 && (e2 & 1)) + { + db = t1[0] + dt21[0]*((double)(c - t1[2]))/dt21[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + if(test_t2t0 && (e2 & 4)) + { /* test t2t0 against c */ + db = t2[0] + dt02[0]*((double)(c - t2[2]))/dt02[2]; + TEST_INT(testl,testh,db,a,q0[0],al,ah) + } + /* Only remaining case is if some edge trivially rejected */ + if(!e0 || !e1 || !e2) + return; + + /* Only one/none got tested - pick either of other two/any two */ + /* Only need to test one edge */ + if(!test_t0t1 && (e0 & 2)) + { + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + if(!test_t1t2 && (e0 & 1)) + {/* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + if(!test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,b,q1[1],bl,bh) + } + + return; + +Lfunc_call: + f.func(f.argptr,root,qt); + if(!QT_IS_EMPTY(qt)) + QT_LEAF_SET_FLAG(qt); } +/* Leaf node: Do definitive test */ +QUADTREE +qtLeaf_visit_tri_rev(root,qt,q0,q1,q2,t0,t1,t2,dt10,dt21,dt02, + scale, s0,s1,s2,sq0,sq1,sq2,f) +int root; +QUADTREE qt; +BCOORD q0[3],q1[3],q2[3]; +BCOORD t0[3],t1[3],t2[3]; +BCOORD dt10[3],dt21[3],dt02[3]; +unsigned int scale,s0,s1,s2,sq0,sq1,sq2; +FUNC f; +{ + double db; + unsigned int e0,e1,e2; + BCOORD a,b,c; + double p0[2], p1[2],cp; + char al,ah,bl,bh,cl,ch; + char testl,testh,test_t0t1,test_t1t2,test_t2t0; + unsigned int ls0,ls1,ls2; + + /* May have gotten passed trivial reject if one/two vertices are ON */ + a = q1[0];b= q0[1]; c= q0[2]; + SIDES_LESS(t0,t1,t2,ls0,ls1,ls2,a,b,c); + + /* First check if can trivial accept: if vertex in cell */ + if(ls0 & ls1 & ls2) + goto Lfunc_call; + if(ls0==0 || ls1 == 0 || ls2 ==0) + return; + /* Assumption: Could not trivial reject*/ + /* IF any coords lie on edge- must be in if couldnt reject */ + if(t0[0]== a || t0[1] == b || t0[2] == c) + goto Lfunc_call; + if(t1[0]== a || t1[1] == b || t1[2] == c) + goto Lfunc_call; + if(t2[0]== a || t2[1] == b || t2[2] == c) + goto Lfunc_call; + /* Test for edge crossings */ + /* Test t0t1 against a,b,c */ + /* First test if t0t1 can be trivially rejected */ + /* If both edges are outside bounds- dont need to test */ + + /* Test t0t1,t1t2,t2t0 against a */ + test_t0t1 = !(((ls0 & 6)==0) || ((ls1 & 6)==0)|| ((ls2 & 6)==0) || + ((sq0 & 6)==0) ||((sq1 & 6)==0)|| ((sq2 & 6)==0)); + e0 = (ls0 ^ ((ls0 >> 1) | (ls0 << 2 & 4))); + bl=bh=0; + /* Test t0t1,t1t2,t2t0 against a */ + if(test_t0t1 && (e0 & 2) ) + { + db = t0[1] + dt10[1]*((double)(a-t0[0])/dt10[0]); + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + test_t1t2= !(((ls0 & 3)==0) || ((ls1 & 3)==0)|| ((ls2 & 3)==0) || + ((sq0 & 3)==0) ||((sq1 & 3)==0)|| ((sq2 & 3)==0)); + if(test_t1t2 && (e0 & 1)) + { /* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + test_t2t0 = !(((ls0 & 5)==0) || ((ls1 & 5)==0)|| ((ls2 & 5)==0) || + ((sq0 & 5)==0) ||((sq1 & 5)==0)|| ((sq2 & 5)==0)); + if(test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + cl = ch = 0; + e1 = (ls1 ^ ((ls1 >> 1) | (ls1 << 2 & 4))); + if(test_t0t1 && (e1 & 2)) + {/* test t0t1 against b */ + db = t0[2] + dt10[2]*(((double)(b-t0[1]))/dt10[1]); + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + if(test_t1t2 && (e1 & 1)) + {/* test t1t2 against b */ + db = t1[2] + dt21[2]*((double)(b - t1[1]))/dt21[1]; + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + if(test_t2t0 && (e1 & 4)) + {/* test t2t0 against b */ + db = t2[2] + dt02[2]*((double)(b - t2[1]))/dt02[1]; + TEST_INT(testl,testh,db,q1[2],c,cl,ch) + } + al = ah = 0; + e2 = (ls2 ^ ((ls2 >> 1) | (ls2 << 2 & 4))); + if(test_t0t1 && (e2 & 2)) + { /* test t0t1 against c */ + db = t0[0] + dt10[0]*(((double)(c-t0[2]))/dt10[2]); + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + if(test_t1t2 && (e2 & 1)) + { + db = t1[0] + dt21[0]*((double)(c - t1[2]))/dt21[2]; + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + if(test_t2t0 && (e2 & 4)) + { /* test t2t0 against c */ + db = t2[0] + dt02[0]*((double)(c - t2[2]))/dt02[2]; + TEST_INT(testl,testh,db,q0[0],a,al,ah) + } + /* Only remaining case is if some edge trivially rejected */ + if(!e0 || !e1 || !e2) + return; + /* Only one/none got tested - pick either of other two/any two */ + /* Only need to test one edge */ + if(!test_t0t1 && (e0 & 2)) + { + db = t0[1] + dt10[1]*((double)(a-t0[0]))/dt10[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + if(!test_t1t2 && (e0 & 1)) + {/* test t1t2 against a */ + db = t1[1] + dt21[1]*((double)(a - t1[0]))/dt21[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + if(!test_t2t0 && (e0 & 4)) + { + db = t2[1] + dt02[1]*((double)(a - t2[0]))/dt02[0]; + TEST_INT(testl,testh,db,q1[1],b,bl,bh) + } + return; +Lfunc_call: + f.func(f.argptr,root,qt); + if(!QT_IS_EMPTY(qt)) + QT_LEAF_SET_FLAG(qt); +}