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gwlarson |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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* sm_stree.c |
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*/ |
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#include "standard.h" |
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#include "sm_geom.h" |
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#include "sm_stree.h" |
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/* Define 4 vertices on the sphere to create a tetrahedralization on |
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the sphere: triangles are as follows: |
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gwlarson |
3.4 |
(2,1,0),(3,2,0), (1,3,0), (2,3,1) |
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gwlarson |
3.1 |
*/ |
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gwlarson |
3.4 |
#ifdef TEST_DRIVER |
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extern FVECT Pick_point[500],Pick_v0[500],Pick_v1[500],Pick_v2[500]; |
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extern int Pick_cnt; |
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#endif |
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gwlarson |
3.1 |
FVECT stDefault_base[4] = { {SQRT3_INV, SQRT3_INV, SQRT3_INV}, |
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{-SQRT3_INV, -SQRT3_INV, SQRT3_INV}, |
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{-SQRT3_INV, SQRT3_INV, -SQRT3_INV}, |
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{SQRT3_INV, -SQRT3_INV, -SQRT3_INV}}; |
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gwlarson |
3.4 |
int stTri_verts[4][3] = { {2,1,0},{3,2,0},{1,3,0},{2,3,1}}; |
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int stTri_nbrs[4][3] = { {2,1,3},{0,2,3},{1,0,3},{2,0,1}}; |
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gwlarson |
3.1 |
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stNth_base_verts(st,i,v1,v2,v3) |
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STREE *st; |
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int i; |
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FVECT v1,v2,v3; |
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{ |
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VCOPY(v1,ST_NTH_BASE(st,stTri_verts[i][0])); |
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VCOPY(v2,ST_NTH_BASE(st,stTri_verts[i][1])); |
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VCOPY(v3,ST_NTH_BASE(st,stTri_verts[i][2])); |
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} |
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/* Frees the 4 quadtrees rooted at st */ |
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stClear(st) |
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STREE *st; |
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{ |
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int i; |
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/* stree always has 4 children corresponding to the base tris |
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*/ |
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for (i = 0; i < 4; i++) |
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qtFree(ST_NTH_ROOT(st, i)); |
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QT_CLEAR_CHILDREN(ST_ROOT(st)); |
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} |
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STREE |
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*stInit(st,center,base) |
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STREE *st; |
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FVECT center,base[4]; |
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{ |
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if(base) |
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ST_SET_BASE(st,base); |
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else |
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ST_SET_BASE(st,stDefault_base); |
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ST_SET_CENTER(st,center); |
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stClear(st); |
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return(st); |
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} |
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/* "base" defines 4 vertices on the sphere to create a tetrahedralization on |
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the sphere: triangles are as follows:(0,1,2),(0,2,3), (0,3,1), (1,3,2) |
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if base is null: does default. |
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*/ |
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STREE |
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*stAlloc(st) |
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STREE *st; |
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{ |
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int i; |
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if(!st) |
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st = (STREE *)malloc(sizeof(STREE)); |
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ST_ROOT(st) = qtAlloc(); |
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QT_CLEAR_CHILDREN(ST_ROOT(st)); |
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return(st); |
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} |
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/* Find location of sample point in the DAG and return lowest level |
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containing triangle. "type" indicates whether the point was found |
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to be in interior to the triangle: GT_FACE, on one of its |
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edges GT_EDGE or coinciding with one of its vertices GT_VERTEX. |
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"which" specifies which vertex (0,1,2) or edge (0=v0v1, 1 = v1v2, 2 = v21) |
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*/ |
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int |
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gwlarson |
3.4 |
stPoint_locate(st,npt) |
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gwlarson |
3.1 |
STREE *st; |
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FVECT npt; |
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{ |
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int i,d,j,id; |
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gwlarson |
3.3 |
QUADTREE *rootptr,*qtptr; |
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gwlarson |
3.1 |
FVECT v1,v2,v3; |
110 |
gwlarson |
3.4 |
OBJECT os[QT_MAXSET+1],*optr; |
111 |
gwlarson |
3.1 |
FVECT p0,p1,p2; |
112 |
gwlarson |
3.2 |
|
113 |
gwlarson |
3.1 |
/* Test each of the root triangles against point id */ |
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for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,v1,v2,v3); |
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/* Return tri that p falls in */ |
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gwlarson |
3.3 |
qtptr = qtRoot_point_locate(rootptr,v1,v2,v3,npt,NULL,NULL,NULL); |
120 |
gwlarson |
3.4 |
if(!qtptr || QT_IS_EMPTY(*qtptr)) |
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gwlarson |
3.1 |
continue; |
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/* Get the set */ |
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gwlarson |
3.4 |
optr = qtqueryset(*qtptr); |
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for (j = QT_SET_CNT(optr),optr = QT_SET_PTR(optr);j > 0; j--) |
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gwlarson |
3.1 |
{ |
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/* Find the first triangle that pt falls */ |
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id = QT_SET_NEXT_ELEM(optr); |
128 |
gwlarson |
3.4 |
qtTri_from_id(id,NULL,NULL,NULL,p0,p1,p2,NULL,NULL,NULL); |
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d = point_in_stri(p0,p1,p2,npt); |
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gwlarson |
3.1 |
if(d) |
131 |
gwlarson |
3.4 |
return(id); |
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gwlarson |
3.1 |
} |
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} |
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return(EMPTY); |
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} |
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137 |
gwlarson |
3.3 |
QUADTREE |
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*stPoint_locate_cell(st,p,t0,t1,t2) |
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gwlarson |
3.1 |
STREE *st; |
140 |
gwlarson |
3.2 |
FVECT p; |
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gwlarson |
3.3 |
FVECT t0,t1,t2; |
142 |
gwlarson |
3.1 |
{ |
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int i,d; |
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gwlarson |
3.3 |
QUADTREE *rootptr,*qtptr; |
145 |
gwlarson |
3.1 |
FVECT v0,v1,v2; |
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147 |
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148 |
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/* Test each of the root triangles against point id */ |
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for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,v0,v1,v2); |
153 |
gwlarson |
3.4 |
/* Return quadtree tri that p falls in */ |
154 |
gwlarson |
3.3 |
qtptr = qtRoot_point_locate(rootptr,v0,v1,v2,p,t0,t1,t2); |
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if(qtptr) |
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return(qtptr); |
157 |
gwlarson |
3.1 |
} /* Point not found */ |
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gwlarson |
3.3 |
return(NULL); |
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gwlarson |
3.1 |
} |
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161 |
gwlarson |
3.3 |
|
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gwlarson |
3.1 |
int |
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gwlarson |
3.2 |
stAdd_tri(st,id,v0,v1,v2) |
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gwlarson |
3.1 |
STREE *st; |
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int id; |
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gwlarson |
3.2 |
FVECT v0,v1,v2; |
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gwlarson |
3.1 |
{ |
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int i,found; |
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QUADTREE *rootptr; |
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gwlarson |
3.2 |
FVECT t0,t1,t2; |
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gwlarson |
3.1 |
found = 0; |
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for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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gwlarson |
3.2 |
stNth_base_verts(st,i,t0,t1,t2); |
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gwlarson |
3.4 |
found |= qtRoot_add_tri(rootptr,t0,t1,t2,v0,v1,v2,id,0); |
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gwlarson |
3.1 |
} |
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return(found); |
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} |
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183 |
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int |
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stApply_to_tri_cells(st,v0,v1,v2,func,arg) |
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STREE *st; |
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FVECT v0,v1,v2; |
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int (*func)(); |
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gwlarson |
3.4 |
int *arg; |
189 |
gwlarson |
3.1 |
{ |
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int i,found; |
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QUADTREE *rootptr; |
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FVECT t0,t1,t2; |
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found = 0; |
195 |
gwlarson |
3.4 |
func(ST_ROOT_PTR(st),arg); |
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QT_SET_FLAG(ST_ROOT(st)); |
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gwlarson |
3.1 |
for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,t0,t1,t2); |
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found |= qtApply_to_tri_cells(rootptr,v0,v1,v2,t0,t1,t2,func,arg); |
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} |
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return(found); |
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} |
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206 |
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207 |
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208 |
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209 |
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int |
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stRemove_tri(st,id,v0,v1,v2) |
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STREE *st; |
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int id; |
213 |
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FVECT v0,v1,v2; |
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{ |
215 |
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216 |
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int i,found; |
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QUADTREE *rootptr; |
218 |
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FVECT t0,t1,t2; |
219 |
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220 |
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found = 0; |
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for(i=0; i < 4; i++) |
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{ |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,t0,t1,t2); |
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found |= qtRemove_tri(rootptr,id,v0,v1,v2,t0,t1,t2); |
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} |
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return(found); |
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} |
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230 |
gwlarson |
3.4 |
int |
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stVisit_tri_edges(st,t0,t1,t2,func,arg1,arg2) |
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STREE *st; |
233 |
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FVECT t0,t1,t2; |
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int (*func)(); |
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int *arg1,arg2; |
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{ |
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int id,i,w; |
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QUADTREE *rootptr; |
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FVECT q0,q1,q2,n,v[3],sdir[3],dir[3],tv,d; |
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double pd,t; |
241 |
gwlarson |
3.1 |
|
242 |
gwlarson |
3.4 |
VCOPY(v[0],t0); VCOPY(v[1],t1); VCOPY(v[2],t2); |
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VSUB(dir[0],t1,t0); VSUB(dir[1],t2,t1);VSUB(dir[2],t0,t2); |
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VCOPY(sdir[0],dir[0]);VCOPY(sdir[1],dir[1]);VCOPY(sdir[2],dir[2]); |
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w = 0; |
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for(i=0; i < 4; i++) |
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{ |
248 |
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#ifdef TEST_DRIVER |
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Pick_cnt = 0; |
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#endif |
251 |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
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stNth_base_verts(st,i,q0,q1,q2); |
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/* Return quadtree tri that p falls in */ |
254 |
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if(!point_in_stri(q0,q1,q2,v[w])) |
255 |
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continue; |
256 |
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id = qtRoot_visit_tri_edges(rootptr,q0,q1,q2,v,dir,&w,func,arg1,arg2); |
257 |
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if(id == INVALID) |
258 |
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{ |
259 |
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#ifdef DEBUG |
260 |
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eputs("stVisit_tri_edges(): Unable to trace edges\n"); |
261 |
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#endif |
262 |
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return(INVALID); |
263 |
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} |
264 |
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if(id == QT_DONE) |
265 |
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return(*arg1); |
266 |
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267 |
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/* Crossed over to next cell: id = nbr */ |
268 |
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while(1) |
269 |
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{ |
270 |
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/* test if ray crosses plane between this quadtree triangle and |
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its neighbor- if it does then find intersection point with |
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ray and plane- this is the new origin |
273 |
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*/ |
274 |
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if(id==0) |
275 |
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VCROSS(n,q1,q2); |
276 |
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else |
277 |
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if(id==1) |
278 |
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VCROSS(n,q2,q0); |
279 |
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else |
280 |
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VCROSS(n,q0,q1); |
281 |
gwlarson |
3.1 |
|
282 |
gwlarson |
3.4 |
if(w==0) |
283 |
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VCOPY(tv,t0); |
284 |
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else |
285 |
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if(w==1) |
286 |
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VCOPY(tv,t1); |
287 |
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else |
288 |
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VCOPY(tv,t2); |
289 |
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if(!intersect_ray_plane(tv,sdir[w],n,0.0,&t,v[w])) |
290 |
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return(INVALID); |
291 |
gwlarson |
3.1 |
|
292 |
gwlarson |
3.4 |
VSUM(v[w],v[w],sdir[w],10.0*FTINY); |
293 |
gwlarson |
3.1 |
|
294 |
gwlarson |
3.4 |
t = (1.0-t-10.0*FTINY); |
295 |
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if(t <= 0.0) |
296 |
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{ |
297 |
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t = FTINY; |
298 |
gwlarson |
3.3 |
#if 0 |
299 |
gwlarson |
3.4 |
eputs("stVisit_tri_edges(): edge end on plane\n"); |
300 |
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#endif |
301 |
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} |
302 |
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dir[w][0] = sdir[w][0] * t; |
303 |
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dir[w][1] = sdir[w][1] * t; |
304 |
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dir[w][2] = sdir[w][2] * t; |
305 |
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i = stTri_nbrs[i][id]; |
306 |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
307 |
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stNth_base_verts(st,i,q0,q1,q2); |
308 |
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id=qtRoot_visit_tri_edges(rootptr,q0,q1,q2,v,dir,&w,func,arg1,arg2); |
309 |
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if(id == QT_DONE) |
310 |
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return(*arg1); |
311 |
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if(id == INVALID) |
312 |
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{ |
313 |
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#if 0 |
314 |
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eputs("stVisit_tri_edges(): point not found\n"); |
315 |
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#endif |
316 |
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return(INVALID); |
317 |
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} |
318 |
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319 |
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} |
320 |
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} /* Point not found */ |
321 |
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return(INVALID); |
322 |
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} |
323 |
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324 |
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325 |
gwlarson |
3.3 |
int |
326 |
gwlarson |
3.4 |
stVisit_tri_edges2(st,t0,t1,t2,func,arg1,arg2) |
327 |
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STREE *st; |
328 |
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FVECT t0,t1,t2; |
329 |
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int (*func)(); |
330 |
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int *arg1,arg2; |
331 |
gwlarson |
3.3 |
{ |
332 |
gwlarson |
3.4 |
int id,i,w; |
333 |
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QUADTREE *rootptr; |
334 |
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FVECT q0,q1,q2,v[3],i_pt; |
335 |
gwlarson |
3.3 |
|
336 |
gwlarson |
3.4 |
VCOPY(v[0],t0); VCOPY(v[1],t1); VCOPY(v[2],t2); |
337 |
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w = -1; |
338 |
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for(i=0; i < 4; i++) |
339 |
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{ |
340 |
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#ifdef TEST_DRIVER |
341 |
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Pick_cnt = 0; |
342 |
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#endif |
343 |
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rootptr = ST_NTH_ROOT_PTR(st,i); |
344 |
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stNth_base_verts(st,i,q0,q1,q2); |
345 |
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/* Return quadtree tri that p falls in */ |
346 |
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if(!point_in_stri(q0,q1,q2,v[0])) |
347 |
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continue; |
348 |
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id = qtRoot_visit_tri_edges2(rootptr,q0,q1,q2,v,i_pt,&w, |
349 |
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func,arg1,arg2); |
350 |
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if(id == INVALID) |
351 |
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{ |
352 |
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#ifdef DEBUG |
353 |
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eputs("stVisit_tri_edges(): Unable to trace edges\n"); |
354 |
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#endif |
355 |
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return(INVALID); |
356 |
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} |
357 |
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if(id == QT_DONE) |
358 |
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return(*arg1); |
359 |
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360 |
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/* Crossed over to next cell: id = nbr */ |
361 |
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while(1) |
362 |
|
|
{ |
363 |
|
|
/* test if ray crosses plane between this quadtree triangle and |
364 |
|
|
its neighbor- if it does then find intersection point with |
365 |
|
|
ray and plane- this is the new origin |
366 |
|
|
*/ |
367 |
|
|
i = stTri_nbrs[i][id]; |
368 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
369 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
370 |
|
|
id=qtRoot_visit_tri_edges2(rootptr,q0,q1,q2,v,i_pt,&w, |
371 |
|
|
func,arg1,arg2); |
372 |
|
|
if(id == QT_DONE) |
373 |
|
|
return(*arg1); |
374 |
|
|
if(id == INVALID) |
375 |
|
|
{ |
376 |
|
|
#ifdef DEBUG |
377 |
|
|
eputs("stVisit_tri_edges(): point not found\n"); |
378 |
|
|
#endif |
379 |
|
|
return(INVALID); |
380 |
|
|
} |
381 |
|
|
|
382 |
|
|
} |
383 |
|
|
} /* Point not found */ |
384 |
|
|
return(INVALID); |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
int |
388 |
|
|
stTrace_edge(st,orig,dir,max_t,func,arg1,arg2) |
389 |
|
|
STREE *st; |
390 |
|
|
FVECT orig,dir; |
391 |
|
|
double max_t; |
392 |
|
|
int (*func)(); |
393 |
|
|
int *arg1,arg2; |
394 |
|
|
{ |
395 |
|
|
int id,i; |
396 |
|
|
QUADTREE *rootptr; |
397 |
|
|
FVECT q0,q1,q2,o,n,d; |
398 |
|
|
double pd,t; |
399 |
|
|
|
400 |
|
|
#if DEBUG |
401 |
|
|
if(max_t > 1.0 || max_t < 0.0) |
402 |
|
|
{ |
403 |
|
|
eputs("stTrace_edge(): max_t must be in [0,1]:adjusting\n"); |
404 |
|
|
max_t = 1.0; |
405 |
|
|
} |
406 |
|
|
#endif |
407 |
|
|
|
408 |
|
|
VCOPY(o,orig); |
409 |
|
|
for(i=0; i < 4; i++) |
410 |
|
|
{ |
411 |
|
|
#ifdef TEST_DRIVER |
412 |
|
|
Pick_cnt = 0; |
413 |
|
|
#endif |
414 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
415 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
416 |
|
|
/* Return quadtree tri that p falls in */ |
417 |
|
|
id= qtRoot_trace_edge(rootptr,q0,q1,q2,o,dir,max_t,func,arg1,arg2); |
418 |
|
|
if(id == INVALID) |
419 |
|
|
continue; |
420 |
|
|
if(id == QT_DONE) |
421 |
|
|
return(*arg1); |
422 |
|
|
|
423 |
|
|
/* Crossed over to next cell: id = nbr */ |
424 |
|
|
while(1) |
425 |
|
|
{ |
426 |
|
|
/* test if ray crosses plane between this quadtree triangle and |
427 |
|
|
its neighbor- if it does then find intersection point with |
428 |
|
|
ray and plane- this is the new origin |
429 |
|
|
*/ |
430 |
|
|
if(id==0) |
431 |
|
|
VCROSS(n,q1,q2); |
432 |
|
|
else |
433 |
|
|
if(id==1) |
434 |
|
|
VCROSS(n,q2,q0); |
435 |
|
|
else |
436 |
|
|
VCROSS(n,q0,q1); |
437 |
|
|
|
438 |
|
|
/* Ray does not cross into next cell: done and tri not found*/ |
439 |
|
|
if(!intersect_ray_plane(orig,dir,n,0.0,&t,o)) |
440 |
|
|
return(INVALID); |
441 |
|
|
|
442 |
|
|
VSUM(o,o,dir,10*FTINY); |
443 |
|
|
|
444 |
|
|
d[0] = dir[0]*(1-t-10*FTINY); |
445 |
|
|
d[1] = dir[1]*(1-t-10*FTINY); |
446 |
|
|
d[2] = dir[2]*(1-t-10*FTINY); |
447 |
|
|
i = stTri_nbrs[i][id]; |
448 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
449 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
450 |
|
|
id = qtRoot_trace_edge(rootptr,q0,q1,q2,o,d,max_t,func,arg1,arg2); |
451 |
|
|
if(id == QT_DONE) |
452 |
|
|
return(*arg1); |
453 |
|
|
if(id == INVALID) |
454 |
|
|
{ |
455 |
|
|
#if 0 |
456 |
|
|
eputs("stTrace_edges(): point not found\n"); |
457 |
|
|
#endif |
458 |
|
|
return(INVALID); |
459 |
|
|
} |
460 |
|
|
|
461 |
|
|
} |
462 |
|
|
} /* Point not found */ |
463 |
|
|
return(INVALID); |
464 |
|
|
} |
465 |
|
|
|
466 |
|
|
|
467 |
|
|
|
468 |
|
|
int |
469 |
|
|
stTrace_ray(st,orig,dir,func,arg1,arg2) |
470 |
|
|
STREE *st; |
471 |
|
|
FVECT orig,dir; |
472 |
|
|
int (*func)(); |
473 |
|
|
int *arg1,arg2; |
474 |
|
|
{ |
475 |
|
|
int id,i; |
476 |
|
|
QUADTREE *rootptr; |
477 |
|
|
FVECT q0,q1,q2,o,n; |
478 |
|
|
double pd,t; |
479 |
|
|
|
480 |
|
|
VCOPY(o,orig); |
481 |
|
|
for(i=0; i < 4; i++) |
482 |
|
|
{ |
483 |
|
|
#ifdef TEST_DRIVER |
484 |
|
|
Pick_cnt = 0; |
485 |
|
|
#endif |
486 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
487 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
488 |
|
|
/* Return quadtree tri that p falls in */ |
489 |
|
|
id= qtRoot_trace_ray(rootptr,q0,q1,q2,o,dir,func,arg1,arg2); |
490 |
|
|
if(id == INVALID) |
491 |
|
|
continue; |
492 |
|
|
if(id == QT_DONE) |
493 |
|
|
return(*arg1); |
494 |
|
|
|
495 |
|
|
/* Crossed over to next cell: id = nbr */ |
496 |
|
|
while(1) |
497 |
|
|
{ |
498 |
|
|
/* test if ray crosses plane between this quadtree triangle and |
499 |
|
|
its neighbor- if it does then find intersection point with |
500 |
|
|
ray and plane- this is the new origin |
501 |
|
|
*/ |
502 |
|
|
if(id==0) |
503 |
|
|
VCROSS(n,q1,q2); |
504 |
|
|
else |
505 |
|
|
if(id==1) |
506 |
|
|
VCROSS(n,q2,q0); |
507 |
|
|
else |
508 |
|
|
VCROSS(n,q0,q1); |
509 |
|
|
|
510 |
|
|
/* Ray does not cross into next cell: done and tri not found*/ |
511 |
|
|
if(!intersect_ray_plane(orig,dir,n,0.0,NULL,o)) |
512 |
|
|
return(INVALID); |
513 |
|
|
|
514 |
|
|
VSUM(o,o,dir,10*FTINY); |
515 |
|
|
i = stTri_nbrs[i][id]; |
516 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
517 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
518 |
|
|
id = qtRoot_trace_ray(rootptr,q0,q1,q2,o,dir,func,arg1,arg2); |
519 |
|
|
if(id == QT_DONE) |
520 |
|
|
return(*arg1); |
521 |
|
|
if(id == INVALID) |
522 |
|
|
return(INVALID); |
523 |
|
|
|
524 |
|
|
} |
525 |
|
|
} /* Point not found */ |
526 |
|
|
return(INVALID); |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
|
530 |
|
|
|
531 |
|
|
stVisit_tri_interior(st,t0,t1,t2,func,arg1,arg2) |
532 |
|
|
STREE *st; |
533 |
|
|
FVECT t0,t1,t2; |
534 |
|
|
int (*func)(); |
535 |
|
|
int *arg1,arg2; |
536 |
|
|
{ |
537 |
|
|
int i; |
538 |
|
|
QUADTREE *rootptr; |
539 |
|
|
FVECT q0,q1,q2; |
540 |
|
|
|
541 |
|
|
for(i=0; i < 4; i++) |
542 |
|
|
{ |
543 |
|
|
rootptr = ST_NTH_ROOT_PTR(st,i); |
544 |
|
|
stNth_base_verts(st,i,q0,q1,q2); |
545 |
|
|
qtVisit_tri_interior(rootptr,q0,q1,q2,t0,t1,t2,0,func,arg1,arg2); |
546 |
|
|
} |
547 |
|
|
} |
548 |
|
|
|
549 |
|
|
|
550 |
|
|
int |
551 |
|
|
stApply_to_tri(st,t0,t1,t2,func,arg1,arg2) |
552 |
|
|
STREE *st; |
553 |
|
|
FVECT t0,t1,t2; |
554 |
|
|
int (*func)(); |
555 |
|
|
int *arg1,arg2; |
556 |
|
|
{ |
557 |
|
|
int f; |
558 |
|
|
FVECT dir; |
559 |
|
|
|
560 |
gwlarson |
3.3 |
/* First add all of the leaf cells lying on the triangle perimeter: |
561 |
|
|
mark all cells seen on the way |
562 |
|
|
*/ |
563 |
gwlarson |
3.4 |
qtClearAllFlags(); /* clear all quadtree branch flags */ |
564 |
|
|
f = 0; |
565 |
|
|
VSUB(dir,t1,t0); |
566 |
|
|
stTrace_edge(st,t0,dir,1.0,func,arg1,arg2); |
567 |
|
|
VSUB(dir,t2,t1); |
568 |
|
|
stTrace_edge(st,t1,dir,1.0,func,arg1,arg2); |
569 |
|
|
VSUB(dir,t0,t2); |
570 |
|
|
stTrace_edge(st,t2,dir,1.0,func,arg1,arg2); |
571 |
|
|
/* Now visit interior */ |
572 |
|
|
stVisit_tri_interior(st,t0,t1,t2,func,arg1,arg2); |
573 |
|
|
} |
574 |
gwlarson |
3.3 |
|
575 |
gwlarson |
3.4 |
|
576 |
|
|
|
577 |
|
|
|
578 |
|
|
|
579 |
|
|
int |
580 |
|
|
stUpdate_tri(st,t_id,t0,t1,t2,edge_func,interior_func) |
581 |
|
|
STREE *st; |
582 |
|
|
int t_id; |
583 |
|
|
FVECT t0,t1,t2; |
584 |
|
|
int (*edge_func)(),(*interior_func)(); |
585 |
|
|
{ |
586 |
|
|
int f; |
587 |
|
|
FVECT dir; |
588 |
|
|
|
589 |
|
|
/* First add all of the leaf cells lying on the triangle perimeter: |
590 |
|
|
mark all cells seen on the way |
591 |
gwlarson |
3.3 |
*/ |
592 |
gwlarson |
3.4 |
ST_CLEAR_FLAGS(st); |
593 |
|
|
f = 0; |
594 |
|
|
/* Visit cells along edges of the tri */ |
595 |
gwlarson |
3.3 |
|
596 |
gwlarson |
3.4 |
stVisit_tri_edges2(st,t0,t1,t2,edge_func,&f,t_id); |
597 |
|
|
|
598 |
|
|
/* Now visit interior */ |
599 |
|
|
if(QT_FLAG_FILL_TRI(f) || QT_FLAG_UPDATE(f)) |
600 |
|
|
stVisit_tri_interior(st,t0,t1,t2,interior_func,&f,t_id); |
601 |
gwlarson |
3.3 |
} |
602 |
|
|
|
603 |
gwlarson |
3.4 |
|
604 |
|
|
|
605 |
|
|
|