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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.c |
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*/ |
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#include "standard.h" |
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#include "sm_list.h" |
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#include "sm_geom.h" |
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#include "sm.h" |
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SM *smMesh = NULL; |
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double smDist_sum=0; |
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int smNew_tri_cnt=0; |
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gwlarson |
3.5 |
static int smBase_nbrs[4][3] = { {3,2,1},{3,0,2},{3,1,0},{1,2,0}}; |
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gwlarson |
3.1 |
#ifdef TEST_DRIVER |
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VIEW Current_View = {0,{0,0,0},{0,0,-1},{0,1,0},60,60,0}; |
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int Pick_cnt =0; |
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gwlarson |
3.5 |
int Pick_tri = -1,Picking = FALSE,Pick_samp=-1; |
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gwlarson |
3.1 |
FVECT Pick_point[500],Pick_origin,Pick_dir; |
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FVECT Pick_v0[500], Pick_v1[500], Pick_v2[500]; |
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FVECT P0,P1,P2; |
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FVECT FrustumNear[4],FrustumFar[4]; |
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double dev_zmin=.01,dev_zmax=1000; |
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#endif |
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smDir(sm,ps,id) |
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SM *sm; |
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FVECT ps; |
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int id; |
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{ |
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FVECT p; |
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VCOPY(p,SM_NTH_WV(sm,id)); |
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point_on_sphere(ps,p,SM_VIEW_CENTER(sm)); |
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} |
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smClear_mesh(sm) |
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SM *sm; |
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{ |
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/* Reset the triangle counters */ |
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SM_TRI_CNT(sm) = 0; |
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SM_NUM_TRIS(sm) = 0; |
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SM_FREE_TRIS(sm) = -1; |
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} |
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smClear_flags(sm,which) |
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SM *sm; |
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int which; |
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{ |
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int i; |
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if(which== -1) |
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for(i=0; i < T_FLAGS;i++) |
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bzero(SM_NTH_FLAGS(sm,i),T_TOTAL_FLAG_BYTES(SM_MAX_TRIS(sm))); |
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else |
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bzero(SM_NTH_FLAGS(sm,which),T_TOTAL_FLAG_BYTES(SM_MAX_TRIS(sm))); |
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} |
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smClear_locator(sm) |
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SM *sm; |
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{ |
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STREE *st; |
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st = SM_LOCATOR(sm); |
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stClear(st); |
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} |
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smInit_locator(sm,center,base) |
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SM *sm; |
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FVECT center,base[4]; |
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{ |
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STREE *st; |
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st = SM_LOCATOR(sm); |
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stInit(st,center,base); |
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} |
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smClear(sm) |
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SM *sm; |
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{ |
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smClear_samples(sm); |
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smClear_mesh(sm); |
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smClear_locator(sm); |
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} |
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int |
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smAlloc_tris(sm,max_verts,max_tris) |
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SM *sm; |
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int max_verts,max_tris; |
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{ |
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int i,nbytes,vbytes,fbytes; |
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vbytes = max_verts*sizeof(VERT); |
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fbytes = T_TOTAL_FLAG_BYTES(max_tris); |
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nbytes = vbytes + max_tris*sizeof(TRI) +T_FLAGS*fbytes + 8; |
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for(i = 1024; nbytes > i; i <<= 1) |
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; |
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/* check if casting works correctly */ |
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max_tris = (i-vbytes-8)/(sizeof(TRI) + T_FLAG_BYTES); |
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fbytes = T_TOTAL_FLAG_BYTES(max_tris); |
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SM_BASE(sm)=(char *)malloc(vbytes+max_tris*sizeof(TRI)+T_FLAGS*fbytes); |
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if (SM_BASE(sm) == NULL) |
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return(0); |
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SM_TRIS(sm) = (TRI *)SM_BASE(sm); |
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SM_VERTS(sm) = (VERT *)(SM_TRIS(sm) + max_tris); |
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SM_NTH_FLAGS(sm,0) = (int4 *)(SM_VERTS(sm) + max_verts); |
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for(i=1; i < T_FLAGS; i++) |
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SM_NTH_FLAGS(sm,i) = (int4 *)(SM_NTH_FLAGS(sm,i-1)+fbytes/sizeof(int4)); |
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SM_MAX_VERTS(sm) = max_verts; |
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SM_MAX_TRIS(sm) = max_tris; |
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smClear_mesh(sm); |
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return(max_tris); |
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} |
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int |
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smAlloc_locator(sm) |
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SM *sm; |
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{ |
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STREE *st; |
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st = SM_LOCATOR(sm); |
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st = stAlloc(st); |
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if(st) |
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return(TRUE); |
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else |
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return(FALSE); |
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} |
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/* Initialize/clear global smL sample list for at least n samples */ |
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smAlloc(max_samples) |
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register int max_samples; |
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{ |
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unsigned nbytes; |
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register unsigned i; |
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int total_points; |
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int max_tris; |
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/* If this is the first call, allocate sample,vertex and triangle lists */ |
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if(!smMesh) |
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{ |
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if(!(smMesh = (SM *)malloc(sizeof(SM)))) |
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error(SYSTEM,"smAlloc():Unable to allocate memory"); |
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bzero(smMesh,sizeof(SM)); |
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} |
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else |
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{ /* If existing structure: first deallocate */ |
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if(SM_BASE(smMesh)) |
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free(SM_BASE(smMesh)); |
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if(SM_SAMP_BASE(smMesh)) |
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free(SM_SAMP_BASE(smMesh)); |
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} |
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/* First allocate at least n samples + extra points:at least enough |
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necessary to form the BASE MESH- Default = 4; |
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*/ |
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max_samples = smAlloc_samples(smMesh, max_samples,SM_EXTRA_POINTS); |
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total_points = max_samples + SM_EXTRA_POINTS; |
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max_tris = total_points*2; |
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/* Now allocate space for mesh vertices and triangles */ |
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max_tris = smAlloc_tris(smMesh, total_points, max_tris); |
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/* Initialize the structure for point,triangle location. |
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*/ |
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smAlloc_locator(smMesh); |
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} |
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smInit_mesh(sm,vp) |
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SM *sm; |
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FVECT vp; |
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{ |
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/* NOTE: Should be elsewhere?*/ |
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smDist_sum = 0; |
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smNew_tri_cnt = 0; |
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VCOPY(SM_VIEW_CENTER(smMesh),vp); |
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smClear_locator(sm); |
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smInit_locator(sm,vp,0); |
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smClear_aux_samples(sm); |
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smClear_mesh(sm); |
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smCreate_base_mesh(sm,SM_DEFAULT); |
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} |
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/* |
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* int |
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* smInit(n) : Initialize/clear data structures for n entries |
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* int n; |
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* |
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* This routine allocates/initializes the sample, mesh, and point-location |
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* structures for at least n samples. |
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* If n is <= 0, then clear data structures. Returns number samples |
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* actually allocated. |
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*/ |
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int |
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smInit(n) |
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register int n; |
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{ |
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int max_vertices; |
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/* If n <=0, Just clear the existing structures */ |
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if(n <= 0) |
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{ |
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smClear(smMesh); |
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return(0); |
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} |
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/* Total mesh vertices includes the sample points and the extra vertices |
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to form the base mesh |
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*/ |
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max_vertices = n + SM_EXTRA_POINTS; |
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/* If the current mesh contains enough room, clear and return */ |
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if(smMesh && max_vertices <= SM_MAX_VERTS(smMesh)) |
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{ |
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smClear(smMesh); |
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return(SM_MAX_SAMP(smMesh)); |
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} |
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/* Otherwise- mesh must be allocated with the appropriate number of |
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samples |
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*/ |
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smAlloc(n); |
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return(SM_MAX_SAMP(smMesh)); |
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} |
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int |
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smLocator_apply_func(sm,v0,v1,v2,func,arg) |
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SM *sm; |
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FVECT v0,v1,v2; |
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int (*func)(); |
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gwlarson |
3.5 |
int *arg; |
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gwlarson |
3.1 |
{ |
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STREE *st; |
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gwlarson |
3.5 |
int found; |
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gwlarson |
3.1 |
FVECT p0,p1,p2; |
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st = SM_LOCATOR(sm); |
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267 |
gwlarson |
3.5 |
VSUB(p0,v0,SM_VIEW_CENTER(sm)); |
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VSUB(p1,v1,SM_VIEW_CENTER(sm)); |
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VSUB(p2,v2,SM_VIEW_CENTER(sm)); |
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gwlarson |
3.1 |
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found = stApply_to_tri_cells(st,p0,p1,p2,func,arg); |
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return(found); |
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} |
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int |
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gwlarson |
3.5 |
add_tri_expand(qtptr,q0,q1,q2,t0,t1,t2,n,arg,t_id) |
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QUADTREE *qtptr; |
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FVECT q0,q1,q2; |
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FVECT t0,t1,t2; |
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int n; |
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int *arg; |
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int t_id; |
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{ |
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OBJECT tset[QT_MAXSET+1],*optr; |
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int i,id,found; |
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FVECT v0,v1,v2; |
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#ifdef DEBUG_TEST_DRIVER |
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Pick_tri = t_id; |
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Picking = TRUE; |
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#endif |
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if(QT_IS_EMPTY(*qtptr)) |
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{ |
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*qtptr = qtaddelem(*qtptr,t_id); |
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return(TRUE); |
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} |
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optr = qtqueryset(*qtptr); |
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if(!inset(optr,t_id)) |
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{ |
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if(QT_SET_CNT(optr) < QT_MAXSET) |
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*qtptr = qtaddelem(*qtptr,t_id); |
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else |
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{ |
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#ifdef DEBUG |
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eputs("add_tri_expand():no room in set\n"); |
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#endif |
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return(FALSE); |
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} |
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} |
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optr = qtqueryset(*qtptr); |
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if(QT_SET_CNT(optr) >= QT_SET_THRESHOLD) |
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if (n < QT_MAX_LEVELS) |
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{ |
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qtgetset(tset,*qtptr); |
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/* If set size exceeds threshold: subdivide cell and reinsert tris*/ |
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qtfreeleaf(*qtptr); |
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qtSubdivide(qtptr); |
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for(optr = QT_SET_PTR(tset),i=QT_SET_CNT(tset); i > 0; i--) |
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{ |
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id = QT_SET_NEXT_ELEM(optr); |
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qtTri_from_id(id,NULL,NULL,NULL,v0,v1,v2,NULL,NULL,NULL); |
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found=qtAdd_tri(qtptr,q0,q1,q2,v0,v1,v2,id,n); |
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#ifdef DEBUG |
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if(!found) |
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eputs("add_tri_expand():Reinsert\n"); |
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#endif |
332 |
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} |
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return(QT_MODIFIED); |
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} |
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else |
336 |
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if(QT_SET_CNT(optr) < QT_MAXSET) |
337 |
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{ |
338 |
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#ifdef DEBUG_TEST_DRIVER |
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eputs("add_tri_expand():too many levels:can't expand\n"); |
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#endif |
341 |
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return(TRUE); |
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} |
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else |
344 |
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{ |
345 |
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#ifdef DEBUG |
346 |
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eputs("add_tri_expand():too many tris inset:can't add\n"); |
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#endif |
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return(FALSE); |
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} |
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} |
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352 |
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353 |
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int |
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add_tri(qtptr,fptr,t_id) |
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QUADTREE *qtptr; |
356 |
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int *fptr; |
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int t_id; |
358 |
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{ |
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360 |
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OBJECT *optr; |
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362 |
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#ifdef DEBUG_TEST_DRIVER |
363 |
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Pick_tri = t_id; |
364 |
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Picking = TRUE; |
365 |
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#endif |
366 |
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if(QT_IS_EMPTY(*qtptr)) |
367 |
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{ |
368 |
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*qtptr = qtaddelem(*qtptr,t_id); |
369 |
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if(!QT_FLAG_FILL_TRI(*fptr)) |
370 |
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(*fptr)++; |
371 |
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} |
372 |
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else |
373 |
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{ |
374 |
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optr = qtqueryset(*qtptr); |
375 |
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if(!inset(optr,t_id)) |
376 |
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{ |
377 |
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if(QT_SET_CNT(optr) < QT_MAXSET) |
378 |
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{ |
379 |
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if(QT_SET_CNT(optr) >= QT_SET_THRESHOLD) |
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(*fptr) |= QT_EXPAND; |
381 |
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if(!QT_FLAG_FILL_TRI(*fptr)) |
382 |
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(*fptr)++; |
383 |
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*qtptr = qtaddelem(*qtptr,t_id); |
384 |
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} |
385 |
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else |
386 |
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{ |
387 |
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#ifdef DEBUG_TESTDRIVER |
388 |
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eputs("add_tri():exceeded set size\n"); |
389 |
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#endif |
390 |
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return(FALSE); |
391 |
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} |
392 |
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} |
393 |
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} |
394 |
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return(TRUE); |
395 |
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} |
396 |
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397 |
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398 |
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int |
399 |
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stInsert_tri(st,t_id,t0,t1,t2) |
400 |
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STREE *st; |
401 |
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int t_id; |
402 |
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FVECT t0,t1,t2; |
403 |
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{ |
404 |
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int f; |
405 |
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FVECT dir; |
406 |
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407 |
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/* First add all of the leaf cells lying on the triangle perimeter: |
408 |
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mark all cells seen on the way |
409 |
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*/ |
410 |
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ST_CLEAR_FLAGS(st); |
411 |
|
|
f = 0; |
412 |
|
|
VSUB(dir,t1,t0); |
413 |
|
|
stTrace_edge(st,t0,dir,1.0,add_tri,&f,t_id); |
414 |
|
|
VSUB(dir,t2,t1); |
415 |
|
|
stTrace_edge(st,t1,dir,1.0,add_tri,&f,t_id); |
416 |
|
|
VSUB(dir,t0,t2); |
417 |
|
|
stTrace_edge(st,t2,dir,1.0,add_tri,&f,t_id); |
418 |
|
|
/* Now visit interior */ |
419 |
|
|
if(QT_FLAG_FILL_TRI(f) || QT_FLAG_UPDATE(f)) |
420 |
|
|
stVisit_tri_interior(st,t0,t1,t2,add_tri_expand,&f,t_id); |
421 |
|
|
} |
422 |
|
|
|
423 |
gwlarson |
3.1 |
smLocator_add_tri(sm,t_id,v0_id,v1_id,v2_id) |
424 |
|
|
SM *sm; |
425 |
|
|
int t_id; |
426 |
|
|
int v0_id,v1_id,v2_id; |
427 |
|
|
{ |
428 |
|
|
STREE *st; |
429 |
gwlarson |
3.5 |
FVECT v0,v1,v2; |
430 |
gwlarson |
3.1 |
|
431 |
|
|
st = SM_LOCATOR(sm); |
432 |
|
|
|
433 |
gwlarson |
3.5 |
VSUB(v0,SM_NTH_WV(sm,v0_id),SM_VIEW_CENTER(sm)); |
434 |
|
|
VSUB(v1,SM_NTH_WV(sm,v1_id),SM_VIEW_CENTER(sm)); |
435 |
|
|
VSUB(v2,SM_NTH_WV(sm,v2_id),SM_VIEW_CENTER(sm)); |
436 |
gwlarson |
3.1 |
|
437 |
gwlarson |
3.5 |
stUpdate_tri(st,t_id,v0,v1,v2,add_tri,add_tri_expand); |
438 |
gwlarson |
3.1 |
|
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
/* Add a triangle to the base array with vertices v1-v2-v3 */ |
442 |
|
|
int |
443 |
|
|
smAdd_tri(sm, v0_id,v1_id,v2_id,tptr) |
444 |
|
|
SM *sm; |
445 |
|
|
int v0_id,v1_id,v2_id; |
446 |
|
|
TRI **tptr; |
447 |
|
|
{ |
448 |
|
|
int t_id; |
449 |
|
|
TRI *t; |
450 |
|
|
|
451 |
|
|
|
452 |
|
|
if(SM_TRI_CNT(sm)+1 > SM_MAX_TRIS(sm)) |
453 |
|
|
error(SYSTEM,"smAdd_tri():Too many triangles"); |
454 |
|
|
|
455 |
|
|
/* Get the id for the next available triangle */ |
456 |
|
|
SM_FREE_TRI_ID(sm,t_id); |
457 |
|
|
if(t_id == -1) |
458 |
|
|
return(t_id); |
459 |
|
|
|
460 |
|
|
t = SM_NTH_TRI(sm,t_id); |
461 |
|
|
T_CLEAR_NBRS(t); |
462 |
|
|
|
463 |
|
|
if(SM_BASE_ID(sm,v0_id) || SM_BASE_ID(sm,v1_id) || SM_BASE_ID(sm,v2_id)) |
464 |
|
|
{ |
465 |
|
|
smClear_tri_flags(sm,t_id); |
466 |
|
|
SM_SET_NTH_T_BASE(sm,t_id); |
467 |
|
|
} |
468 |
|
|
else |
469 |
|
|
{ |
470 |
|
|
SM_CLEAR_NTH_T_BASE(sm,t_id); |
471 |
|
|
SM_SET_NTH_T_ACTIVE(sm,t_id); |
472 |
|
|
SM_SET_NTH_T_LRU(sm,t_id); |
473 |
|
|
SM_SET_NTH_T_NEW(sm,t_id); |
474 |
|
|
SM_NUM_TRIS(sm)++; |
475 |
|
|
smNew_tri_cnt++; |
476 |
|
|
} |
477 |
|
|
/* set the triangle vertex ids */ |
478 |
|
|
T_NTH_V(t,0) = v0_id; |
479 |
|
|
T_NTH_V(t,1) = v1_id; |
480 |
|
|
T_NTH_V(t,2) = v2_id; |
481 |
|
|
|
482 |
|
|
SM_NTH_VERT(sm,v0_id) = t_id; |
483 |
|
|
SM_NTH_VERT(sm,v1_id) = t_id; |
484 |
|
|
SM_NTH_VERT(sm,v2_id) = t_id; |
485 |
|
|
|
486 |
|
|
if(t) |
487 |
|
|
*tptr = t; |
488 |
|
|
/* return initialized triangle */ |
489 |
|
|
return(t_id); |
490 |
|
|
} |
491 |
|
|
|
492 |
|
|
int |
493 |
|
|
smClosest_vertex_in_tri(sm,v0_id,v1_id,v2_id,p,eps) |
494 |
|
|
SM *sm; |
495 |
|
|
int v0_id,v1_id,v2_id; |
496 |
|
|
FVECT p; |
497 |
|
|
double eps; |
498 |
|
|
{ |
499 |
|
|
FVECT v; |
500 |
|
|
double d,d0,d1,d2; |
501 |
|
|
int closest = -1; |
502 |
|
|
|
503 |
|
|
if(v0_id != -1) |
504 |
|
|
{ |
505 |
|
|
smDir(sm,v,v0_id); |
506 |
|
|
d0 = DIST(p,v); |
507 |
|
|
if(eps < 0 || d0 < eps) |
508 |
|
|
{ |
509 |
|
|
closest = v0_id; |
510 |
|
|
d = d0; |
511 |
|
|
} |
512 |
|
|
} |
513 |
|
|
if(v1_id != -1) |
514 |
|
|
{ |
515 |
|
|
smDir(sm,v,v1_id); |
516 |
|
|
d1 = DIST(p,v); |
517 |
|
|
if(closest== -1) |
518 |
|
|
{ |
519 |
|
|
if(eps < 0 || d1 < eps) |
520 |
|
|
{ |
521 |
|
|
closest = v1_id; |
522 |
|
|
d = d1; |
523 |
|
|
} |
524 |
|
|
} |
525 |
|
|
else |
526 |
gwlarson |
3.5 |
if(d1 < d0) |
527 |
gwlarson |
3.1 |
{ |
528 |
|
|
if((eps < 0) || d1 < eps) |
529 |
|
|
{ |
530 |
|
|
closest = v1_id; |
531 |
|
|
d = d1; |
532 |
|
|
} |
533 |
|
|
} |
534 |
gwlarson |
3.5 |
} |
535 |
gwlarson |
3.1 |
if(v2_id != -1) |
536 |
|
|
{ |
537 |
|
|
smDir(sm,v,v2_id); |
538 |
|
|
d2 = DIST(p,v); |
539 |
|
|
if((eps < 0) || d2 < eps) |
540 |
gwlarson |
3.5 |
if(closest == -1 ||(d2 < d)) |
541 |
gwlarson |
3.1 |
return(v2_id); |
542 |
|
|
} |
543 |
|
|
return(closest); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
|
547 |
|
|
int |
548 |
|
|
smClosest_vertex_in_w_tri(sm,v0_id,v1_id,v2_id,p) |
549 |
|
|
SM *sm; |
550 |
|
|
int v0_id,v1_id,v2_id; |
551 |
|
|
FVECT p; |
552 |
|
|
{ |
553 |
|
|
FVECT v; |
554 |
|
|
double d,d0,d1,d2; |
555 |
|
|
int closest; |
556 |
|
|
|
557 |
|
|
VCOPY(v,SM_NTH_WV(sm,v0_id)); |
558 |
|
|
d = d0 = DIST(p,v); |
559 |
|
|
closest = v0_id; |
560 |
|
|
|
561 |
|
|
VCOPY(v,SM_NTH_WV(sm,v1_id)); |
562 |
|
|
d1 = DIST(p,v); |
563 |
gwlarson |
3.5 |
if(d1 < d0) |
564 |
gwlarson |
3.1 |
{ |
565 |
|
|
closest = v1_id; |
566 |
|
|
d = d1; |
567 |
|
|
} |
568 |
|
|
VCOPY(v,SM_NTH_WV(sm,v2_id)); |
569 |
|
|
d2 = DIST(p,v); |
570 |
|
|
if(d2 < d) |
571 |
|
|
return(v2_id); |
572 |
|
|
else |
573 |
|
|
return(closest); |
574 |
|
|
} |
575 |
|
|
|
576 |
|
|
void |
577 |
gwlarson |
3.3 |
smTris_swap_edge(sm,t_id,t1_id,e,e1,tn_id,tn1_id,add,del) |
578 |
gwlarson |
3.1 |
SM *sm; |
579 |
|
|
int t_id,t1_id; |
580 |
|
|
int e,e1; |
581 |
gwlarson |
3.5 |
int *tn_id,*tn1_id; |
582 |
gwlarson |
3.3 |
LIST **add,**del; |
583 |
gwlarson |
3.1 |
|
584 |
|
|
{ |
585 |
|
|
TRI *t,*t1; |
586 |
|
|
TRI *ta,*tb; |
587 |
|
|
int verts[3],enext,eprev,e1next,e1prev; |
588 |
|
|
TRI *n; |
589 |
|
|
FVECT p1,p2,p3; |
590 |
|
|
int ta_id,tb_id; |
591 |
|
|
/* swap diagonal (e relative to t, and e1 relative to t1) |
592 |
|
|
defined by quadrilateral |
593 |
|
|
formed by t,t1- swap for the opposite diagonal |
594 |
|
|
*/ |
595 |
|
|
t = SM_NTH_TRI(sm,t_id); |
596 |
|
|
t1 = SM_NTH_TRI(sm,t1_id); |
597 |
|
|
enext = (e+1)%3; |
598 |
|
|
eprev = (e+2)%3; |
599 |
|
|
e1next = (e1+1)%3; |
600 |
|
|
e1prev = (e1+2)%3; |
601 |
|
|
verts[e] = T_NTH_V(t,e); |
602 |
|
|
verts[enext] = T_NTH_V(t1,e1prev); |
603 |
|
|
verts[eprev] = T_NTH_V(t,eprev); |
604 |
|
|
ta_id = smAdd_tri(sm,verts[0],verts[1],verts[2],&ta); |
605 |
gwlarson |
3.3 |
*add = push_data(*add,ta_id); |
606 |
gwlarson |
3.1 |
verts[e1] = T_NTH_V(t1,e1); |
607 |
|
|
verts[e1next] = T_NTH_V(t,eprev); |
608 |
|
|
verts[e1prev] = T_NTH_V(t1,e1prev); |
609 |
|
|
tb_id = smAdd_tri(sm,verts[0],verts[1],verts[2],&tb); |
610 |
gwlarson |
3.3 |
*add = push_data(*add,tb_id); |
611 |
|
|
|
612 |
gwlarson |
3.1 |
/* set the neighbors */ |
613 |
|
|
T_NTH_NBR(ta,e) = T_NTH_NBR(t1,e1next); |
614 |
|
|
T_NTH_NBR(tb,e1) = T_NTH_NBR(t,enext); |
615 |
|
|
T_NTH_NBR(ta,enext) = tb_id; |
616 |
|
|
T_NTH_NBR(tb,e1next) = ta_id; |
617 |
|
|
T_NTH_NBR(ta,eprev) = T_NTH_NBR(t,eprev); |
618 |
|
|
T_NTH_NBR(tb,e1prev) = T_NTH_NBR(t1,e1prev); |
619 |
|
|
|
620 |
|
|
/* Reset neighbor pointers of original neighbors */ |
621 |
|
|
n = SM_NTH_TRI(sm,T_NTH_NBR(t,enext)); |
622 |
|
|
T_NTH_NBR(n,T_NTH_NBR_PTR(t_id,n)) = tb_id; |
623 |
|
|
n = SM_NTH_TRI(sm,T_NTH_NBR(t,eprev)); |
624 |
|
|
T_NTH_NBR(n,T_NTH_NBR_PTR(t_id,n)) = ta_id; |
625 |
|
|
|
626 |
|
|
n = SM_NTH_TRI(sm,T_NTH_NBR(t1,e1next)); |
627 |
|
|
T_NTH_NBR(n,T_NTH_NBR_PTR(t1_id,n)) = ta_id; |
628 |
|
|
n = SM_NTH_TRI(sm,T_NTH_NBR(t1,e1prev)); |
629 |
|
|
T_NTH_NBR(n,T_NTH_NBR_PTR(t1_id,n)) = tb_id; |
630 |
|
|
|
631 |
|
|
/* Delete two parent triangles */ |
632 |
gwlarson |
3.5 |
|
633 |
gwlarson |
3.3 |
*del = push_data(*del,t_id); |
634 |
|
|
if(SM_IS_NTH_T_NEW(sm,t_id)) |
635 |
|
|
SM_CLEAR_NTH_T_NEW(sm,t_id); |
636 |
|
|
else |
637 |
|
|
SM_CLEAR_NTH_T_BASE(sm,t_id); |
638 |
|
|
*del = push_data(*del,t1_id); |
639 |
|
|
if(SM_IS_NTH_T_NEW(sm,t1_id)) |
640 |
|
|
SM_CLEAR_NTH_T_NEW(sm,t1_id); |
641 |
|
|
else |
642 |
|
|
SM_CLEAR_NTH_T_BASE(sm,t1_id); |
643 |
gwlarson |
3.1 |
*tn_id = ta_id; |
644 |
|
|
*tn1_id = tb_id; |
645 |
|
|
} |
646 |
|
|
|
647 |
gwlarson |
3.3 |
smUpdate_locator(sm,add_list,del_list) |
648 |
|
|
SM *sm; |
649 |
|
|
LIST *add_list,*del_list; |
650 |
|
|
{ |
651 |
|
|
int t_id; |
652 |
|
|
TRI *t; |
653 |
|
|
while(add_list) |
654 |
|
|
{ |
655 |
|
|
t_id = pop_list(&add_list); |
656 |
|
|
if(!SM_IS_NTH_T_NEW(sm,t_id) && !SM_IS_NTH_T_BASE(sm,t_id)) |
657 |
|
|
{ |
658 |
|
|
SM_SET_NTH_T_NEW(sm,t_id); |
659 |
gwlarson |
3.4 |
smNew_tri_cnt--; |
660 |
gwlarson |
3.3 |
continue; |
661 |
|
|
} |
662 |
|
|
t = SM_NTH_TRI(sm,t_id); |
663 |
|
|
smLocator_add_tri(sm,t_id,T_NTH_V(t,0),T_NTH_V(t,1),T_NTH_V(t,2)); |
664 |
|
|
} |
665 |
|
|
|
666 |
|
|
while(del_list) |
667 |
|
|
{ |
668 |
|
|
t_id = pop_list(&del_list); |
669 |
|
|
if(SM_IS_NTH_T_NEW(sm,t_id)) |
670 |
|
|
{ |
671 |
|
|
smDelete_tri(sm,t_id); |
672 |
|
|
continue; |
673 |
|
|
} |
674 |
|
|
smLocator_remove_tri(sm,t_id); |
675 |
|
|
smDelete_tri(sm,t_id); |
676 |
|
|
} |
677 |
|
|
} |
678 |
gwlarson |
3.1 |
/* MUST add check for constrained edges */ |
679 |
gwlarson |
3.3 |
int |
680 |
gwlarson |
3.1 |
smFix_tris(sm,id,tlist) |
681 |
|
|
SM *sm; |
682 |
|
|
int id; |
683 |
|
|
LIST *tlist; |
684 |
|
|
{ |
685 |
|
|
TRI *t,*t_opp; |
686 |
gwlarson |
3.3 |
FVECT p,p1,p2,p3; |
687 |
|
|
int e,e1,swapped = 0; |
688 |
gwlarson |
3.1 |
int t_id,t_opp_id; |
689 |
gwlarson |
3.3 |
LIST *add_list,*del_list; |
690 |
|
|
|
691 |
|
|
|
692 |
|
|
add_list = del_list = NULL; |
693 |
|
|
VSUB(p,SM_NTH_WV(sm,id),SM_VIEW_CENTER(sm)); |
694 |
gwlarson |
3.1 |
while(tlist) |
695 |
|
|
{ |
696 |
gwlarson |
3.3 |
t_id = pop_list(&tlist); |
697 |
gwlarson |
3.1 |
t = SM_NTH_TRI(sm,t_id); |
698 |
|
|
e = (T_WHICH_V(t,id)+1)%3; |
699 |
|
|
t_opp_id = T_NTH_NBR(t,e); |
700 |
|
|
t_opp = SM_NTH_TRI(sm,t_opp_id); |
701 |
|
|
|
702 |
|
|
smDir(sm,p1,T_NTH_V(t_opp,0)); |
703 |
|
|
smDir(sm,p2,T_NTH_V(t_opp,1)); |
704 |
|
|
smDir(sm,p3,T_NTH_V(t_opp,2)); |
705 |
|
|
if(point_in_cone(p,p1,p2,p3)) |
706 |
|
|
{ |
707 |
|
|
swapped = 1; |
708 |
|
|
e1 = T_NTH_NBR_PTR(t_id,t_opp); |
709 |
|
|
/* check list for t_opp and Remove if there */ |
710 |
|
|
remove_from_list(t_opp_id,&tlist); |
711 |
gwlarson |
3.3 |
smTris_swap_edge(sm,t_id,t_opp_id,e,e1,&t_id,&t_opp_id, |
712 |
|
|
&add_list,&del_list); |
713 |
gwlarson |
3.1 |
tlist = push_data(tlist,t_id); |
714 |
|
|
tlist = push_data(tlist,t_opp_id); |
715 |
|
|
} |
716 |
|
|
} |
717 |
gwlarson |
3.3 |
smUpdate_locator(sm,add_list,del_list); |
718 |
gwlarson |
3.1 |
return(swapped); |
719 |
|
|
} |
720 |
|
|
|
721 |
|
|
/* Give the vertex "id" and a triangle "t" that it belongs to- return the |
722 |
|
|
next nbr in a counter clockwise order about vertex "id" |
723 |
|
|
*/ |
724 |
|
|
int |
725 |
|
|
smTri_next_ccw_nbr(sm,t,id) |
726 |
|
|
SM *sm; |
727 |
|
|
TRI *t; |
728 |
|
|
int id; |
729 |
|
|
{ |
730 |
|
|
int t_id; |
731 |
|
|
int tri; |
732 |
|
|
|
733 |
|
|
/* Want the edge for which "id" is the destination */ |
734 |
|
|
t_id = (T_WHICH_V(t,id)+ 2)% 3; |
735 |
|
|
tri = T_NTH_NBR(t,t_id); |
736 |
|
|
return(tri); |
737 |
|
|
} |
738 |
|
|
|
739 |
|
|
void |
740 |
|
|
smReplace_point(sm,tri,id,nid) |
741 |
|
|
SM *sm; |
742 |
|
|
TRI *tri; |
743 |
|
|
int id,nid; |
744 |
|
|
{ |
745 |
|
|
TRI *t; |
746 |
|
|
int t_id; |
747 |
|
|
|
748 |
|
|
T_NTH_V(tri,T_WHICH_V(tri,id)) = nid; |
749 |
|
|
|
750 |
gwlarson |
3.5 |
t_id = smTri_next_ccw_nbr(sm,tri,nid); |
751 |
|
|
while((t = SM_NTH_TRI(sm,t_id)) != tri) |
752 |
gwlarson |
3.1 |
{ |
753 |
|
|
T_NTH_V(t,T_WHICH_V(t,id)) = nid; |
754 |
|
|
t_id = smTri_next_ccw_nbr(sm,t,nid); |
755 |
|
|
} |
756 |
|
|
} |
757 |
|
|
|
758 |
|
|
|
759 |
|
|
smClear_tri_flags(sm,id) |
760 |
|
|
SM *sm; |
761 |
|
|
int id; |
762 |
|
|
{ |
763 |
|
|
int i; |
764 |
|
|
|
765 |
|
|
for(i=0; i < T_FLAGS; i++) |
766 |
|
|
SM_CLEAR_NTH_T_FLAG(sm,id,i); |
767 |
|
|
|
768 |
|
|
} |
769 |
|
|
|
770 |
|
|
/* Locate the point-id in the point location structure: */ |
771 |
|
|
int |
772 |
|
|
smReplace_vertex(sm,c,dir,p,tri_id,snew_id,type,which) |
773 |
|
|
SM *sm; |
774 |
|
|
COLR c; |
775 |
|
|
FVECT dir,p; |
776 |
|
|
int tri_id,snew_id; |
777 |
gwlarson |
3.5 |
int type,which; |
778 |
gwlarson |
3.1 |
{ |
779 |
|
|
int n_id,s_id; |
780 |
|
|
TRI *tri; |
781 |
|
|
|
782 |
|
|
tri = SM_NTH_TRI(sm,tri_id); |
783 |
|
|
/* Get the sample that corresponds to the "which" vertex of "tri" */ |
784 |
|
|
/* NEED: have re-init that sets clock flag */ |
785 |
|
|
/* If this is a base-sample: create a new sample and replace |
786 |
|
|
all references to the base sample with references to the |
787 |
|
|
new sample |
788 |
|
|
*/ |
789 |
|
|
s_id = T_NTH_V(tri,which); |
790 |
|
|
if(SM_BASE_ID(sm,s_id)) |
791 |
|
|
{ |
792 |
|
|
if(snew_id != -1) |
793 |
|
|
n_id = smAdd_sample_point(sm,c,dir,p); |
794 |
|
|
else |
795 |
|
|
n_id = snew_id; |
796 |
|
|
smReplace_point(sm,tri,s_id,n_id); |
797 |
|
|
s_id = n_id; |
798 |
|
|
} |
799 |
|
|
else /* If the sample exists, reset the values */ |
800 |
|
|
/* NOTE: This test was based on the SPHERICAL coordinates |
801 |
|
|
of the point: If we are doing a multiple-sample-per |
802 |
|
|
SPHERICAL pixel: we will want to test for equality- |
803 |
|
|
and do other processing: for now: SINGLE SAMPLE PER |
804 |
|
|
PIXEL |
805 |
|
|
*/ |
806 |
|
|
/* NOTE: snew_id needs to be marked as invalid?*/ |
807 |
|
|
if(snew_id == -1) |
808 |
|
|
smInit_sample(sm,s_id,c,dir,p); |
809 |
|
|
else |
810 |
|
|
smReset_sample(sm,s_id,snew_id); |
811 |
|
|
return(s_id); |
812 |
|
|
} |
813 |
|
|
|
814 |
|
|
|
815 |
|
|
/* Locate the point-id in the point location structure: */ |
816 |
|
|
int |
817 |
|
|
smInsert_point_in_tri(sm,c,dir,p,s_id,tri_id) |
818 |
|
|
SM *sm; |
819 |
|
|
COLR c; |
820 |
|
|
FVECT dir,p; |
821 |
|
|
int s_id,tri_id; |
822 |
|
|
{ |
823 |
|
|
TRI *tri,*t0,*t1,*t2,*nbr; |
824 |
|
|
int v0_id,v1_id,v2_id,n_id; |
825 |
|
|
int t0_id,t1_id,t2_id; |
826 |
|
|
LIST *tlist; |
827 |
|
|
FVECT npt; |
828 |
|
|
|
829 |
|
|
if(s_id == SM_INVALID) |
830 |
|
|
s_id = smAdd_sample_point(sm,c,dir,p); |
831 |
|
|
|
832 |
|
|
tri = SM_NTH_TRI(sm,tri_id); |
833 |
|
|
v0_id = T_NTH_V(tri,0); |
834 |
|
|
v1_id = T_NTH_V(tri,1); |
835 |
|
|
v2_id = T_NTH_V(tri,2); |
836 |
|
|
|
837 |
|
|
n_id = -1; |
838 |
|
|
if(SM_BASE_ID(sm,v0_id)||SM_BASE_ID(sm,v1_id)||SM_BASE_ID(sm,v2_id)) |
839 |
|
|
{ |
840 |
|
|
smDir(sm,npt,s_id); |
841 |
|
|
/* Change to an add and delete */ |
842 |
|
|
t0_id = (SM_BASE_ID(sm,v0_id))?v0_id:-1; |
843 |
|
|
t1_id = (SM_BASE_ID(sm,v1_id))?v1_id:-1; |
844 |
|
|
t2_id = (SM_BASE_ID(sm,v2_id))?v2_id:-1; |
845 |
|
|
n_id = smClosest_vertex_in_tri(sm,t0_id,t1_id,t2_id,npt,P_REPLACE_EPS); |
846 |
|
|
} |
847 |
|
|
t0_id = smAdd_tri(sm,s_id,v0_id,v1_id,&t0); |
848 |
gwlarson |
3.3 |
/* Add triangle to the locator */ |
849 |
|
|
smLocator_add_tri(sm,t0_id,s_id,v0_id,v1_id); |
850 |
|
|
|
851 |
gwlarson |
3.1 |
t1_id = smAdd_tri(sm,s_id,v1_id,v2_id,&t1); |
852 |
gwlarson |
3.3 |
smLocator_add_tri(sm,t1_id,s_id,v1_id,v2_id); |
853 |
gwlarson |
3.1 |
t2_id = smAdd_tri(sm,s_id,v2_id,v0_id,&t2); |
854 |
gwlarson |
3.3 |
smLocator_add_tri(sm,t2_id,s_id,v2_id,v0_id); |
855 |
|
|
|
856 |
gwlarson |
3.1 |
/* Set the neighbor pointers for the new tris */ |
857 |
|
|
T_NTH_NBR(t0,0) = t2_id; |
858 |
|
|
T_NTH_NBR(t0,1) = T_NTH_NBR(tri,0); |
859 |
|
|
T_NTH_NBR(t0,2) = t1_id; |
860 |
|
|
T_NTH_NBR(t1,0) = t0_id; |
861 |
|
|
T_NTH_NBR(t1,1) = T_NTH_NBR(tri,1); |
862 |
|
|
T_NTH_NBR(t1,2) = t2_id; |
863 |
|
|
T_NTH_NBR(t2,0) = t1_id; |
864 |
|
|
T_NTH_NBR(t2,1) = T_NTH_NBR(tri,2); |
865 |
|
|
T_NTH_NBR(t2,2) = t0_id; |
866 |
|
|
|
867 |
|
|
/* Reset the neigbor pointers for the neighbors of the original */ |
868 |
|
|
nbr = SM_NTH_TRI(sm,T_NTH_NBR(tri,0)); |
869 |
|
|
T_NTH_NBR(nbr,T_NTH_NBR_PTR(tri_id,nbr)) = t0_id; |
870 |
|
|
nbr = SM_NTH_TRI(sm,T_NTH_NBR(tri,1)); |
871 |
|
|
T_NTH_NBR(nbr,T_NTH_NBR_PTR(tri_id,nbr)) = t1_id; |
872 |
|
|
nbr = SM_NTH_TRI(sm,T_NTH_NBR(tri,2)); |
873 |
|
|
T_NTH_NBR(nbr,T_NTH_NBR_PTR(tri_id,nbr)) = t2_id; |
874 |
|
|
|
875 |
gwlarson |
3.3 |
smLocator_remove_tri(sm,tri_id); |
876 |
gwlarson |
3.1 |
smDelete_tri(sm,tri_id); |
877 |
|
|
|
878 |
|
|
/* Fix up the new triangles*/ |
879 |
|
|
tlist = push_data(NULL,t0_id); |
880 |
|
|
tlist = push_data(tlist,t1_id); |
881 |
|
|
tlist = push_data(tlist,t2_id); |
882 |
|
|
|
883 |
|
|
smFix_tris(sm,s_id,tlist); |
884 |
|
|
|
885 |
|
|
if(n_id != -1) |
886 |
|
|
smDelete_point(sm,n_id); |
887 |
|
|
|
888 |
|
|
return(s_id); |
889 |
|
|
} |
890 |
|
|
|
891 |
|
|
|
892 |
|
|
int |
893 |
gwlarson |
3.5 |
smPointLocate(sm,pt,norm) |
894 |
gwlarson |
3.1 |
SM *sm; |
895 |
|
|
FVECT pt; |
896 |
gwlarson |
3.5 |
int norm; |
897 |
gwlarson |
3.1 |
{ |
898 |
|
|
STREE *st; |
899 |
|
|
int tri; |
900 |
|
|
FVECT npt; |
901 |
|
|
|
902 |
|
|
st = SM_LOCATOR(sm); |
903 |
|
|
if(norm) |
904 |
|
|
{ |
905 |
gwlarson |
3.5 |
VSUB(npt,pt,SM_VIEW_CENTER(sm)); |
906 |
|
|
tri = stPoint_locate(st,npt); |
907 |
gwlarson |
3.1 |
} |
908 |
|
|
else |
909 |
gwlarson |
3.5 |
tri = stPoint_locate(st,pt); |
910 |
gwlarson |
3.1 |
return(tri); |
911 |
|
|
} |
912 |
|
|
|
913 |
|
|
QUADTREE |
914 |
gwlarson |
3.4 |
smPointLocateCell(sm,pt,norm,v0,v1,v2) |
915 |
gwlarson |
3.1 |
SM *sm; |
916 |
gwlarson |
3.2 |
FVECT pt; |
917 |
gwlarson |
3.5 |
int norm; |
918 |
gwlarson |
3.4 |
FVECT v0,v1,v2; |
919 |
gwlarson |
3.1 |
{ |
920 |
|
|
STREE *st; |
921 |
gwlarson |
3.4 |
QUADTREE *qtptr; |
922 |
gwlarson |
3.1 |
FVECT npt; |
923 |
|
|
|
924 |
|
|
st = SM_LOCATOR(sm); |
925 |
|
|
if(norm) |
926 |
|
|
{ |
927 |
gwlarson |
3.5 |
VSUB(npt,pt,SM_VIEW_CENTER(sm)); |
928 |
gwlarson |
3.1 |
|
929 |
gwlarson |
3.4 |
qtptr = stPoint_locate_cell(st,npt,v0,v1,v2); |
930 |
gwlarson |
3.1 |
} |
931 |
|
|
else |
932 |
gwlarson |
3.4 |
qtptr = stPoint_locate_cell(st,pt,v0,v1,v2); |
933 |
gwlarson |
3.1 |
|
934 |
gwlarson |
3.4 |
if(qtptr) |
935 |
|
|
return(*qtptr); |
936 |
|
|
else |
937 |
|
|
return(EMPTY); |
938 |
gwlarson |
3.1 |
} |
939 |
|
|
|
940 |
|
|
int |
941 |
|
|
smAdd_sample_to_mesh(sm,c,dir,pt,s_id) |
942 |
|
|
SM *sm; |
943 |
|
|
COLR c; |
944 |
|
|
FVECT dir,pt; |
945 |
|
|
int s_id; |
946 |
|
|
{ |
947 |
|
|
int t_id; |
948 |
|
|
double d; |
949 |
|
|
FVECT p; |
950 |
|
|
|
951 |
|
|
/* If new, foreground pt */ |
952 |
|
|
if(pt) |
953 |
|
|
{ |
954 |
|
|
/* NOTE: This should be elsewhere! */ |
955 |
|
|
d = DIST(pt,SM_VIEW_CENTER(smMesh)); |
956 |
|
|
smDist_sum += 1.0/d; |
957 |
|
|
/************************************/ |
958 |
gwlarson |
3.5 |
t_id = smPointLocate(smMesh,pt,TRUE); |
959 |
|
|
if(t_id >= 0) |
960 |
gwlarson |
3.1 |
s_id = smInsert_point_in_tri(smMesh,c,dir,pt,s_id,t_id); |
961 |
|
|
#ifdef DEBUG |
962 |
|
|
else |
963 |
gwlarson |
3.5 |
{ |
964 |
|
|
c[0] = 255;c[1]=0;c[2]=0; |
965 |
|
|
s_id = smAdd_sample_point(sm,c,dir,pt); |
966 |
|
|
eputs("smAdd_sample_to_mesh(): not found fg\n"); |
967 |
|
|
} |
968 |
gwlarson |
3.1 |
#endif |
969 |
|
|
} |
970 |
|
|
else if(s_id != -1) |
971 |
|
|
{ |
972 |
|
|
VCOPY(p,SM_NTH_WV(sm,s_id)); |
973 |
|
|
if(SM_NTH_W_DIR(sm,s_id) != -1) |
974 |
|
|
{ |
975 |
|
|
/* NOTE: This should be elsewhere! */ |
976 |
|
|
d = DIST(p,SM_VIEW_CENTER(smMesh)); |
977 |
|
|
smDist_sum += 1.0/d; |
978 |
|
|
/************************************/ |
979 |
|
|
} |
980 |
gwlarson |
3.5 |
t_id = smPointLocate(smMesh,p,TRUE); |
981 |
|
|
if(t_id != -1) |
982 |
gwlarson |
3.1 |
s_id = smInsert_point_in_tri(smMesh,c,dir,p,s_id,t_id); |
983 |
|
|
#ifdef DEBUG |
984 |
|
|
else |
985 |
gwlarson |
3.5 |
eputs("smAdd_sample_to_mesh():not found reinsert\n"); |
986 |
gwlarson |
3.1 |
#endif |
987 |
|
|
} |
988 |
|
|
/* Is a BG(sky point) */ |
989 |
|
|
else |
990 |
|
|
{ |
991 |
gwlarson |
3.5 |
t_id = smPointLocate(smMesh,dir,FALSE); |
992 |
|
|
if(t_id != -1) |
993 |
gwlarson |
3.1 |
s_id = smInsert_point_in_tri(smMesh,c,dir,NULL,s_id,t_id); |
994 |
gwlarson |
3.5 |
|
995 |
gwlarson |
3.1 |
#ifdef DEBUG |
996 |
|
|
else |
997 |
gwlarson |
3.5 |
eputs("smAdd_sample_to_mesh(): not found bg\n"); |
998 |
gwlarson |
3.1 |
#endif |
999 |
|
|
} |
1000 |
|
|
return(s_id); |
1001 |
|
|
} |
1002 |
|
|
|
1003 |
|
|
/* |
1004 |
|
|
* int |
1005 |
|
|
* smNewSamp(c, dir, p) : register new sample point and return index |
1006 |
|
|
* COLR c; : pixel color (RGBE) |
1007 |
|
|
* FVECT dir; : ray direction vector |
1008 |
|
|
* FVECT p; : world intersection point |
1009 |
|
|
* |
1010 |
|
|
* Add new sample point to data structures, removing old values as necessary. |
1011 |
|
|
* New sample representation will be output in next call to smUpdate(). |
1012 |
|
|
* If the point is a sky point: then v=NULL |
1013 |
|
|
*/ |
1014 |
|
|
int |
1015 |
|
|
smNewSamp(c,dir,p) |
1016 |
|
|
COLR c; |
1017 |
|
|
FVECT dir; |
1018 |
|
|
FVECT p; |
1019 |
|
|
|
1020 |
|
|
{ |
1021 |
|
|
int s_id; |
1022 |
gwlarson |
3.5 |
int debug=0; |
1023 |
gwlarson |
3.1 |
|
1024 |
|
|
/* First check if this the first sample: if so initialize mesh */ |
1025 |
|
|
if(SM_NUM_SAMP(smMesh) == 0) |
1026 |
|
|
smInit_mesh(smMesh,odev.v.vp); |
1027 |
gwlarson |
3.5 |
if(!debug) |
1028 |
|
|
s_id = smAdd_sample_to_mesh(smMesh,c,dir,p,-1); |
1029 |
gwlarson |
3.1 |
return(s_id); |
1030 |
|
|
|
1031 |
|
|
} |
1032 |
|
|
/* |
1033 |
|
|
* int |
1034 |
|
|
* smFindsamp(orig, dir): intersect ray with 3D rep. and find closest sample |
1035 |
|
|
* FVECT orig, dir; |
1036 |
|
|
* |
1037 |
|
|
* Find the closest sample to the given ray. Return -1 on failure. |
1038 |
|
|
*/ |
1039 |
|
|
|
1040 |
|
|
/* |
1041 |
|
|
* smClean() : display has been wiped clean |
1042 |
|
|
* |
1043 |
|
|
* Called after display has been effectively cleared, meaning that all |
1044 |
|
|
* geometry must be resent down the pipeline in the next call to smUpdate(). |
1045 |
|
|
*/ |
1046 |
|
|
|
1047 |
|
|
|
1048 |
|
|
/* |
1049 |
|
|
* smUpdate(vp, qua) : update OpenGL output geometry for view vp |
1050 |
|
|
* VIEW *vp; : desired view |
1051 |
|
|
* int qua; : quality level (percentage on linear time scale) |
1052 |
|
|
* |
1053 |
|
|
* Draw new geometric representation using OpenGL calls. Assume that the |
1054 |
|
|
* view has already been set up and the correct frame buffer has been |
1055 |
|
|
* selected for drawing. The quality level is on a linear scale, where 100% |
1056 |
|
|
* is full (final) quality. It is not necessary to redraw geometry that has |
1057 |
|
|
* been output since the last call to smClean(). |
1058 |
|
|
*/ |
1059 |
|
|
|
1060 |
|
|
|
1061 |
|
|
int |
1062 |
|
|
smClear_vert(sm,id) |
1063 |
|
|
SM *sm; |
1064 |
|
|
int id; |
1065 |
|
|
{ |
1066 |
|
|
if(SM_INVALID_POINT_ID(sm,id)) |
1067 |
|
|
return(FALSE); |
1068 |
|
|
|
1069 |
|
|
SM_NTH_VERT(sm,id) = SM_INVALID; |
1070 |
|
|
|
1071 |
|
|
return(TRUE); |
1072 |
|
|
} |
1073 |
|
|
|
1074 |
|
|
int |
1075 |
|
|
smAdd_base_vertex(sm,v,d) |
1076 |
|
|
SM *sm; |
1077 |
|
|
FVECT v,d; |
1078 |
|
|
{ |
1079 |
|
|
int id; |
1080 |
|
|
|
1081 |
|
|
/* First add coordinate to the sample array */ |
1082 |
|
|
id = smAdd_aux_point(sm,v,d); |
1083 |
|
|
if(id == -1) |
1084 |
|
|
return(SM_INVALID); |
1085 |
|
|
/* Initialize triangle pointer to -1 */ |
1086 |
|
|
smClear_vert(sm,id); |
1087 |
|
|
return(id); |
1088 |
|
|
} |
1089 |
|
|
|
1090 |
|
|
|
1091 |
|
|
|
1092 |
|
|
/* Initialize a the point location DAG based on a 6 triangle tesselation |
1093 |
|
|
of the unit sphere centered on the view center. The DAG structure |
1094 |
|
|
contains 6 roots: one for each initial base triangle |
1095 |
|
|
*/ |
1096 |
|
|
|
1097 |
|
|
int |
1098 |
|
|
smCreate_base_mesh(sm,type) |
1099 |
|
|
SM *sm; |
1100 |
|
|
int type; |
1101 |
|
|
{ |
1102 |
gwlarson |
3.5 |
int i,id,tri_id,nbr_id; |
1103 |
gwlarson |
3.1 |
int p[4],ids[4]; |
1104 |
|
|
int v0_id,v1_id,v2_id; |
1105 |
|
|
TRI *tris[4]; |
1106 |
|
|
FVECT d,pt,cntr; |
1107 |
|
|
|
1108 |
|
|
/* First insert the base vertices into the sample point array */ |
1109 |
|
|
|
1110 |
|
|
for(i=0; i < 4; i++) |
1111 |
|
|
{ |
1112 |
gwlarson |
3.5 |
VCOPY(cntr,stDefault_base[i]); |
1113 |
|
|
cntr[0] += .01; |
1114 |
|
|
cntr[1] += .02; |
1115 |
|
|
cntr[2] += .03; |
1116 |
|
|
VADD(cntr,cntr,SM_VIEW_CENTER(sm)); |
1117 |
gwlarson |
3.1 |
point_on_sphere(d,cntr,SM_VIEW_CENTER(sm)); |
1118 |
|
|
id = smAdd_base_vertex(sm,cntr,d); |
1119 |
|
|
/* test to make sure vertex allocated */ |
1120 |
|
|
if(id != -1) |
1121 |
|
|
p[i] = id; |
1122 |
|
|
else |
1123 |
|
|
return(0); |
1124 |
|
|
} |
1125 |
|
|
/* Create the base triangles */ |
1126 |
|
|
for(i=0;i < 4; i++) |
1127 |
|
|
{ |
1128 |
|
|
v0_id = p[stTri_verts[i][0]]; |
1129 |
|
|
v1_id = p[stTri_verts[i][1]]; |
1130 |
|
|
v2_id = p[stTri_verts[i][2]]; |
1131 |
|
|
if((ids[i] = smAdd_tri(sm, v0_id,v1_id,v2_id,&(tris[i])))== -1) |
1132 |
|
|
return(0); |
1133 |
gwlarson |
3.3 |
smLocator_add_tri(sm,ids[i],v0_id,v1_id,v2_id); |
1134 |
gwlarson |
3.1 |
} |
1135 |
|
|
/* Set neighbors */ |
1136 |
|
|
|
1137 |
gwlarson |
3.5 |
for(tri_id=0;tri_id < 4; tri_id++) |
1138 |
|
|
for(nbr_id=0; nbr_id < 3; nbr_id++) |
1139 |
|
|
T_NTH_NBR(tris[tri_id],nbr_id) = smBase_nbrs[tri_id][nbr_id]; |
1140 |
gwlarson |
3.1 |
|
1141 |
|
|
return(1); |
1142 |
|
|
|
1143 |
|
|
} |
1144 |
|
|
|
1145 |
|
|
|
1146 |
|
|
int |
1147 |
|
|
smNext_tri_flag_set(sm,i,which,b) |
1148 |
|
|
SM *sm; |
1149 |
|
|
int i,which; |
1150 |
gwlarson |
3.5 |
int b; |
1151 |
gwlarson |
3.1 |
{ |
1152 |
|
|
|
1153 |
|
|
for(; i < SM_TRI_CNT(sm);i++) |
1154 |
|
|
{ |
1155 |
|
|
|
1156 |
gwlarson |
3.5 |
if(!SM_IS_NTH_T_FLAG(sm,i,which)) |
1157 |
|
|
continue; |
1158 |
gwlarson |
3.1 |
if(!b) |
1159 |
|
|
break; |
1160 |
|
|
if((b==1) && !SM_BG_TRI(sm,i)) |
1161 |
|
|
break; |
1162 |
|
|
if((b==2) && SM_BG_TRI(sm,i)) |
1163 |
|
|
break; |
1164 |
|
|
} |
1165 |
|
|
|
1166 |
|
|
return(i); |
1167 |
|
|
} |
1168 |
|
|
|
1169 |
|
|
|
1170 |
|
|
int |
1171 |
|
|
smNext_valid_tri(sm,i) |
1172 |
|
|
SM *sm; |
1173 |
|
|
int i; |
1174 |
|
|
{ |
1175 |
|
|
|
1176 |
|
|
while( i < SM_TRI_CNT(sm) && !T_IS_VALID(SM_NTH_TRI(sm,i))) |
1177 |
|
|
i++; |
1178 |
|
|
|
1179 |
|
|
return(i); |
1180 |
|
|
} |
1181 |
|
|
|
1182 |
|
|
|
1183 |
|
|
|
1184 |
gwlarson |
3.5 |
qtTri_from_id(t_id,v0,v1,v2,n0,n1,n2,v0_idp,v1_idp,v2_idp) |
1185 |
gwlarson |
3.1 |
int t_id; |
1186 |
|
|
FVECT v0,v1,v2; |
1187 |
gwlarson |
3.5 |
FVECT n0,n1,n2; |
1188 |
|
|
int *v0_idp,*v1_idp,*v2_idp; |
1189 |
gwlarson |
3.1 |
{ |
1190 |
|
|
TRI *t; |
1191 |
|
|
int v0_id,v1_id,v2_id; |
1192 |
|
|
|
1193 |
|
|
t = SM_NTH_TRI(smMesh,t_id); |
1194 |
|
|
v0_id = T_NTH_V(t,0); |
1195 |
|
|
v1_id = T_NTH_V(t,1); |
1196 |
|
|
v2_id = T_NTH_V(t,2); |
1197 |
|
|
|
1198 |
gwlarson |
3.5 |
if(v0) |
1199 |
|
|
{ |
1200 |
|
|
VCOPY(v0,SM_NTH_WV(smMesh,v0_id)); |
1201 |
|
|
VCOPY(v1,SM_NTH_WV(smMesh,v1_id)); |
1202 |
|
|
VCOPY(v2,SM_NTH_WV(smMesh,v2_id)); |
1203 |
|
|
} |
1204 |
|
|
if(n0) |
1205 |
|
|
{ |
1206 |
|
|
smDir(smMesh,n0,v0_id); |
1207 |
|
|
smDir(smMesh,n1,v1_id); |
1208 |
|
|
smDir(smMesh,n2,v2_id); |
1209 |
gwlarson |
3.1 |
|
1210 |
gwlarson |
3.5 |
} |
1211 |
|
|
if(v0_idp) |
1212 |
|
|
{ |
1213 |
|
|
*v0_idp = v0_id; |
1214 |
|
|
*v1_idp = v1_id; |
1215 |
|
|
*v2_idp = v2_id; |
1216 |
|
|
} |
1217 |
gwlarson |
3.1 |
} |
1218 |
|
|
|
1219 |
|
|
|
1220 |
|
|
/* |
1221 |
|
|
* int |
1222 |
|
|
* smFindSamp(FVECT orig, FVECT dir) |
1223 |
|
|
* |
1224 |
|
|
* Find the closest sample to the given ray. Returns sample id, -1 on failure. |
1225 |
|
|
* "dir" is assumed to be normalized |
1226 |
|
|
*/ |
1227 |
|
|
int |
1228 |
|
|
smFindSamp(orig,dir) |
1229 |
|
|
FVECT orig,dir; |
1230 |
|
|
{ |
1231 |
|
|
FVECT r,v0,v1,v2,a,b,p; |
1232 |
gwlarson |
3.5 |
OBJECT os[QT_MAXCSET+1],t_set[QT_MAXSET+1],*ts; |
1233 |
gwlarson |
3.1 |
QUADTREE qt; |
1234 |
|
|
int s_id; |
1235 |
|
|
double d; |
1236 |
|
|
|
1237 |
|
|
/* r is the normalized vector from the view center to the current |
1238 |
|
|
* ray point ( starting with "orig"). Find the cell that r falls in, |
1239 |
|
|
* and test the ray against all triangles stored in the cell. If |
1240 |
|
|
* the test fails, trace the projection of the ray across to the |
1241 |
|
|
* next cell it intersects: iterate until either an intersection |
1242 |
|
|
* is found, or the projection ray is // to the direction. The sample |
1243 |
|
|
* corresponding to the triangle vertex closest to the intersection |
1244 |
|
|
* point is returned. |
1245 |
|
|
*/ |
1246 |
|
|
|
1247 |
|
|
/* First test if "orig" coincides with the View_center or if "dir" is |
1248 |
|
|
parallel to r formed by projecting "orig" on the sphere. In |
1249 |
|
|
either case, do a single test against the cell containing the |
1250 |
|
|
intersection of "dir" and the sphere |
1251 |
|
|
*/ |
1252 |
|
|
point_on_sphere(b,orig,SM_VIEW_CENTER(smMesh)); |
1253 |
|
|
d = -DOT(b,dir); |
1254 |
|
|
if(EQUAL_VEC3(orig,SM_VIEW_CENTER(smMesh)) || EQUAL(fabs(d),1.0)) |
1255 |
|
|
{ |
1256 |
gwlarson |
3.4 |
qt = smPointLocateCell(smMesh,dir,FALSE,NULL,NULL,NULL); |
1257 |
gwlarson |
3.1 |
/* Test triangles in the set for intersection with Ray:returns |
1258 |
|
|
first found |
1259 |
|
|
*/ |
1260 |
gwlarson |
3.5 |
ts = qtqueryset(qt); |
1261 |
|
|
s_id = intersect_tri_set(ts,orig,dir,p); |
1262 |
|
|
#ifdef DEBUG_TEST_DRIVER |
1263 |
gwlarson |
3.1 |
VCOPY(Pick_point[0],p); |
1264 |
|
|
#endif |
1265 |
|
|
return(s_id); |
1266 |
|
|
} |
1267 |
|
|
else |
1268 |
|
|
{ |
1269 |
|
|
/* Starting with orig, Walk along projection of ray onto sphere */ |
1270 |
|
|
point_on_sphere(r,orig,SM_VIEW_CENTER(smMesh)); |
1271 |
gwlarson |
3.4 |
qt = smPointLocateCell(smMesh,r,FALSE,v0,v1,v2); |
1272 |
gwlarson |
3.5 |
/* os will contain all triangles seen thus far */ |
1273 |
gwlarson |
3.1 |
qtgetset(t_set,qt); |
1274 |
|
|
setcopy(os,t_set); |
1275 |
|
|
|
1276 |
|
|
/* Calculate ray perpendicular to dir: when projection ray is // to dir, |
1277 |
|
|
the dot product will become negative. |
1278 |
|
|
*/ |
1279 |
|
|
VSUM(a,b,dir,d); |
1280 |
|
|
d = DOT(a,b); |
1281 |
|
|
while(d > 0) |
1282 |
|
|
{ |
1283 |
gwlarson |
3.5 |
s_id = intersect_tri_set(t_set,orig,dir,p); |
1284 |
|
|
#ifdef DEBUG_TEST_DRIVER |
1285 |
gwlarson |
3.1 |
VCOPY(Pick_point[0],p); |
1286 |
|
|
#endif |
1287 |
|
|
if(s_id != EMPTY) |
1288 |
|
|
return(s_id); |
1289 |
|
|
/* Find next cell that projection of ray intersects */ |
1290 |
gwlarson |
3.4 |
traceRay(r,dir,v0,v1,v2,r); |
1291 |
|
|
qt = smPointLocateCell(smMesh,r,FALSE,v0,v1,v2); |
1292 |
gwlarson |
3.1 |
qtgetset(t_set,qt); |
1293 |
|
|
/* Check triangles in set against those seen so far(os):only |
1294 |
|
|
check new triangles for intersection (t_set') |
1295 |
|
|
*/ |
1296 |
|
|
check_set(t_set,os); |
1297 |
gwlarson |
3.4 |
d = DOT(a,r); |
1298 |
gwlarson |
3.1 |
} |
1299 |
|
|
} |
1300 |
gwlarson |
3.5 |
#ifdef DEBUG |
1301 |
gwlarson |
3.1 |
eputs("smFindSamp():Pick Ray did not intersect mesh"); |
1302 |
|
|
#endif |
1303 |
|
|
return(EMPTY); |
1304 |
|
|
} |
1305 |
|
|
|
1306 |
|
|
|
1307 |
gwlarson |
3.5 |
smRebuild_mesh(sm,vp) |
1308 |
gwlarson |
3.1 |
SM *sm; |
1309 |
gwlarson |
3.5 |
FVECT vp; |
1310 |
gwlarson |
3.1 |
{ |
1311 |
|
|
int i; |
1312 |
|
|
FVECT dir; |
1313 |
|
|
COLR c; |
1314 |
|
|
FVECT p,ov; |
1315 |
|
|
|
1316 |
|
|
/* Clear the mesh- and rebuild using the current sample array */ |
1317 |
|
|
|
1318 |
gwlarson |
3.5 |
VSUB(ov,vp,SM_VIEW_CENTER(sm)); |
1319 |
|
|
smInit_mesh(sm,vp); |
1320 |
gwlarson |
3.1 |
|
1321 |
|
|
SM_FOR_ALL_SAMPLES(sm,i) |
1322 |
|
|
{ |
1323 |
|
|
if(SM_NTH_W_DIR(sm,i)==-1) |
1324 |
|
|
VADD(SM_NTH_WV(sm,i),SM_NTH_WV(sm,i),ov); |
1325 |
|
|
smAdd_sample_to_mesh(sm,NULL,NULL,NULL,i); |
1326 |
|
|
} |
1327 |
|
|
} |
1328 |
gwlarson |
3.5 |
|
1329 |
|
|
int |
1330 |
|
|
intersect_tri_set(t_set,orig,dir,pt) |
1331 |
|
|
OBJECT *t_set; |
1332 |
|
|
FVECT orig,dir,pt; |
1333 |
|
|
{ |
1334 |
|
|
OBJECT *optr; |
1335 |
|
|
int i,t_id,id; |
1336 |
|
|
int pid0,pid1,pid2; |
1337 |
|
|
FVECT p0,p1,p2,p; |
1338 |
|
|
TRI *t; |
1339 |
|
|
|
1340 |
|
|
optr = QT_SET_PTR(t_set); |
1341 |
|
|
for(i = QT_SET_CNT(t_set); i > 0; i--) |
1342 |
|
|
{ |
1343 |
|
|
t_id = QT_SET_NEXT_ELEM(optr); |
1344 |
|
|
|
1345 |
|
|
t = SM_NTH_TRI(smMesh,t_id); |
1346 |
|
|
pid0 = T_NTH_V(t,0); |
1347 |
|
|
pid1 = T_NTH_V(t,1); |
1348 |
|
|
pid2 = T_NTH_V(t,2); |
1349 |
|
|
VCOPY(p0,SM_NTH_WV(smMesh,pid0)); |
1350 |
|
|
VCOPY(p1,SM_NTH_WV(smMesh,pid1)); |
1351 |
|
|
VCOPY(p2,SM_NTH_WV(smMesh,pid2)); |
1352 |
|
|
if(ray_intersect_tri(orig,dir,p0,p1,p2,p)) |
1353 |
|
|
{ |
1354 |
|
|
id = closest_point_in_tri(p0,p1,p2,p,pid0,pid1,pid2); |
1355 |
|
|
|
1356 |
|
|
if(pt) |
1357 |
|
|
VCOPY(pt,p); |
1358 |
|
|
#ifdef DEBUG_TEST_DRIVER |
1359 |
|
|
Pick_tri = t_id; |
1360 |
|
|
Pick_samp = id; |
1361 |
|
|
VCOPY(Pick_point[0],p); |
1362 |
|
|
#endif |
1363 |
|
|
return(id); |
1364 |
|
|
} |
1365 |
|
|
} |
1366 |
|
|
return(-1); |
1367 |
|
|
} |
1368 |
|
|
|
1369 |
|
|
int |
1370 |
|
|
ray_trace_check_set(qtptr,orig,dir,tptr,os) |
1371 |
|
|
QUADTREE *qtptr; |
1372 |
|
|
FVECT orig,dir; |
1373 |
|
|
int *tptr; |
1374 |
|
|
OBJECT *os; |
1375 |
|
|
{ |
1376 |
|
|
OBJECT tset[QT_MAXSET+1]; |
1377 |
|
|
double dt,t; |
1378 |
|
|
int found; |
1379 |
|
|
FVECT o; |
1380 |
|
|
|
1381 |
|
|
|
1382 |
|
|
if(!QT_IS_EMPTY(*qtptr)) |
1383 |
|
|
{ |
1384 |
|
|
VADD(o,orig,SM_VIEW_CENTER(smMesh)); |
1385 |
|
|
qtgetset(tset,*qtptr); |
1386 |
|
|
/* Check triangles in set against those seen so far(os):only |
1387 |
|
|
check new triangles for intersection (t_set') |
1388 |
|
|
*/ |
1389 |
|
|
check_set(tset,os); |
1390 |
|
|
if((found = intersect_tri_set(tset,o,dir,NULL))!= -1) |
1391 |
|
|
{ |
1392 |
|
|
*tptr = found; |
1393 |
|
|
return(QT_DONE); |
1394 |
|
|
} |
1395 |
|
|
} |
1396 |
|
|
return(FALSE); |
1397 |
|
|
} |
1398 |
|
|
|
1399 |
|
|
int |
1400 |
|
|
smFindSamp_opt(orig,dir) |
1401 |
|
|
FVECT orig,dir; |
1402 |
|
|
{ |
1403 |
|
|
FVECT b,p,o; |
1404 |
|
|
OBJECT *ts; |
1405 |
|
|
QUADTREE qt; |
1406 |
|
|
int s_id; |
1407 |
|
|
double d; |
1408 |
|
|
|
1409 |
|
|
/* r is the normalized vector from the view center to the current |
1410 |
|
|
* ray point ( starting with "orig"). Find the cell that r falls in, |
1411 |
|
|
* and test the ray against all triangles stored in the cell. If |
1412 |
|
|
* the test fails, trace the projection of the ray across to the |
1413 |
|
|
* next cell it intersects: iterate until either an intersection |
1414 |
|
|
* is found, or the projection ray is // to the direction. The sample |
1415 |
|
|
* corresponding to the triangle vertex closest to the intersection |
1416 |
|
|
* point is returned. |
1417 |
|
|
*/ |
1418 |
|
|
|
1419 |
|
|
/* First test if "orig" coincides with the View_center or if "dir" is |
1420 |
|
|
parallel to r formed by projecting "orig" on the sphere. In |
1421 |
|
|
either case, do a single test against the cell containing the |
1422 |
|
|
intersection of "dir" and the sphere |
1423 |
|
|
*/ |
1424 |
|
|
/* orig will be updated-so preserve original value */ |
1425 |
|
|
if(!smMesh) |
1426 |
|
|
return; |
1427 |
|
|
point_on_sphere(b,orig,SM_VIEW_CENTER(smMesh)); |
1428 |
|
|
d = -DOT(b,dir); |
1429 |
|
|
if(EQUAL_VEC3(orig,SM_VIEW_CENTER(smMesh)) || EQUAL(fabs(d),1.0)) |
1430 |
|
|
{ |
1431 |
|
|
qt = smPointLocateCell(smMesh,dir,FALSE,NULL,NULL,NULL); |
1432 |
|
|
/* Test triangles in the set for intersection with Ray:returns |
1433 |
|
|
first found |
1434 |
|
|
*/ |
1435 |
|
|
ts = qtqueryset(qt); |
1436 |
|
|
s_id = intersect_tri_set(ts,orig,dir,p); |
1437 |
|
|
#ifdef DEBUG_TEST_DRIVER |
1438 |
|
|
VCOPY(Pick_point[0],p); |
1439 |
|
|
#endif |
1440 |
|
|
} |
1441 |
|
|
else |
1442 |
|
|
{ |
1443 |
|
|
OBJECT t_set[QT_MAXCSET+1]; |
1444 |
|
|
/* Test each of the root triangles against point id */ |
1445 |
|
|
QT_CLEAR_SET(t_set); |
1446 |
|
|
VSUB(o,orig,SM_VIEW_CENTER(smMesh)); |
1447 |
|
|
ST_CLEAR_FLAGS(SM_LOCATOR(smMesh)); |
1448 |
|
|
s_id=stTrace_ray(SM_LOCATOR(smMesh),o,dir,ray_trace_check_set,&s_id,t_set); |
1449 |
|
|
} |
1450 |
|
|
return(s_id); |
1451 |
|
|
} |
1452 |
|
|
|
1453 |
|
|
|
1454 |
|
|
|
1455 |
|
|
|
1456 |
|
|
|
1457 |
|
|
|
1458 |
|
|
|
1459 |
|
|
|
1460 |
|
|
|
1461 |
|
|
|
1462 |
gwlarson |
3.1 |
|
1463 |
|
|
|