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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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|
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/* |
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* sm.h |
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*/ |
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|
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#ifndef _SM_H_ |
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#define _SM_H_ |
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#include "rhd_sample.h" |
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#define NEWSETS |
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|
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|
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#ifndef TRUE |
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#define TRUE 1 |
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#define FALSE 0 |
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#endif |
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|
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#define ON_V 1 |
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#define ON_P 2 |
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#define ON_E 3 |
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#define IN_T 4 |
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|
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#define S_REPLACE_EPS 0.04 /* if (distance on sphere between sample |
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and a base point) < S_REPLACE_EPS, |
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replace base: |
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*/ |
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#define S_REPLACE_SCALE (5.*5.) /* if (distance to new point squared) is |
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> (triangle edge length squared* |
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S_REPLACE_SCALE):for all edges/triangle |
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vertices: new point is puncture |
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point: dont add |
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*/ |
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#define S_REPLACE_TRI 2e-8 /* .052 radians to the sixth power */ |
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|
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#define SQRT3_2 0.8660254 |
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|
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#define SM_DEFAULT 0 |
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#define SM_EXTRA_POINTS 162 |
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#define SM_BASE_TRIS 320 |
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#define SM_EXTRA_VERTS SM_EXTRA_POINTS |
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|
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#define SM_INC_PERCENT 0.60 /* If number of new triangles added |
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since last full redraw is > |
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(SM_INC_PERCENT * total triangles) |
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do full redraw instead of incremental |
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*/ |
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|
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#define SM_VIEW_FRAC 0.1 |
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|
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typedef int VERT; /* One triangle that vertex belongs to- the rest |
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are derived by traversing neighbors */ |
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|
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typedef struct _EDGE { |
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int verts[2]; |
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int tris[2]; |
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} EDGE; |
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|
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#define E_NTH_VERT(e,i) ((e>0)?Edges[(e)].verts[(i)]:Edges[-(e)].verts[(1-i)]) |
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#define SET_E_NTH_VERT(e,i,v) if(e>0) Edges[(e)].verts[(i)]=(v); \ |
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else Edges[-(e)].verts[(1-i)]=(v) |
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#define E_NTH_TRI(e,i) ((e>0)?Edges[(e)].tris[(i)]:Edges[-(e)].tris[(1-i)]) |
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#define SET_E_NTH_TRI(e,i,v) if(e>0) Edges[(e)].tris[(i)]=(v); \ |
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else Edges[-(e)].tris[(1-i)]=(v) |
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#define eClear_edges() (Ecnt = 0) |
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|
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#define FOR_ALL_EDGES(i) for((i)=1; (i) <= Ecnt; i++) |
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#define FOR_ALL_EDGES_FROM(e,i) for((i)=++e; (i) <= Ecnt; i++) |
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typedef struct _TRI { |
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int verts[3]; /* Ids into sample and vertex array for each vertex*/ |
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int nbrs[3]; /* Ids for neighboring triangles: -1 if invalid */ |
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}TRI; |
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|
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#define T_NTH_NBR(t,i) ((t)->nbrs[(i)]) |
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#define T_CLEAR_NBRS(t) (T_NTH_NBR(t,0)=T_NTH_NBR(t,1)=T_NTH_NBR(t,2)=-1) |
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#define T_NTH_NBR_PTR(t,n) \ |
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(T_NTH_NBR(n,0)==(t)?0:T_NTH_NBR(n,1)==(t)?1:T_NTH_NBR(n,2)==(t)?2:-1) |
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#define T_NTH_V(t,i) ((t)->verts[(i)]) |
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#define T_WHICH_V(t,i) \ |
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(T_NTH_V(t,0)==(i)?0:T_NTH_V(t,1)==(i)?1:T_NTH_V(t,2)==(i)?2:-1) |
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#define T_NEXT_FREE(t) ((t)->nbrs[0]) |
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#define T_NEXT_AVAILABLE(t) ((t)->nbrs[0]) |
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#define T_VALID_FLAG(t) ((t)->nbrs[1]) |
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#define T_IS_VALID(t) (T_VALID_FLAG(t)!=-1) |
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#define T_FLAGS 4 |
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|
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typedef struct _SM { |
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FVECT view_center; /* Canonical view center defining unit sphere */ |
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SAMP *samples; /* Sample point information */ |
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STREE locator; /* spherical quadtree for point/triangle location */ |
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int max_tris; /* Maximum number of triangles */ |
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int num_tri; /* Current number of triangles */ |
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int sample_tris; /* Current number of non-base triangles*/ |
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int free_tris; /* pointer to free_list */ |
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int available_tris; /* pointer to available_list */ |
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int max_verts; /* Maximum number of vertices in the mesh */ |
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TRI *tris; /* Pointer to list of triangle structs */ |
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VERT *verts; /* List of vertices */ |
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int4 *flags[T_FLAGS]; /* Bit 0 set if active(in current frustum) */ |
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/* Bit 1 set if not rendered since created */ |
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/* Bit 2 set if base triangle */ |
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}SM; |
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|
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#define T_ACTIVE_FLAG 0 |
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#define T_NEW_FLAG 1 |
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#define T_BASE_FLAG 2 |
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#define T_BG_FLAG 3 |
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|
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#define SM_VIEW_CENTER(m) ((m)->view_center) |
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#define SM_SAMP(m) ((m)->samples) |
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#define SM_LOCATOR(m) (&((m)->locator)) |
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#define SM_MAX_TRIS(m) ((m)->max_tris) |
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#define SM_NUM_TRI(m) ((m)->num_tri) |
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#define SM_SAMPLE_TRIS(m) ((m)->sample_tris) |
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#define SM_FREE_TRIS(m) ((m)->free_tris) |
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#define SM_AVAILABLE_TRIS(m) ((m)->available_tris) |
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#define SM_MAX_VERTS(m) ((m)->max_verts) |
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#define SM_TRIS(m) ((m)->tris) |
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#define SM_VERTS(m) ((m)->verts) |
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#define SM_NTH_FLAGS(m,n) ((m)->flags[(n)]) |
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#define SM_FLAGS(m) ((m)->flags) |
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#define SM_IS_NTH_T_FLAG(sm,n,f) IS_FLAG(SM_NTH_FLAGS(sm,f),n) |
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#define SM_SET_NTH_T_FLAG(sm,n,f) SET_FLAG(SM_NTH_FLAGS(sm,f),n) |
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#define SM_CLR_NTH_T_FLAG(sm,n,f) CLR_FLAG(SM_NTH_FLAGS(sm,f),n) |
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#define SM_IS_NTH_T_ACTIVE(sm,n) SM_IS_NTH_T_FLAG(sm,n,T_ACTIVE_FLAG) |
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#define SM_IS_NTH_T_BASE(sm,n) SM_IS_NTH_T_FLAG(sm,n,T_BASE_FLAG) |
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#define SM_IS_NTH_T_NEW(sm,n) SM_IS_NTH_T_FLAG(sm,n,T_NEW_FLAG) |
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#define SM_IS_NTH_T_BG(sm,n) SM_IS_NTH_T_FLAG(sm,n,T_BG_FLAG) |
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#define SM_SET_NTH_T_ACTIVE(sm,n) SM_SET_NTH_T_FLAG(sm,n,T_ACTIVE_FLAG) |
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#define SM_SET_NTH_T_BASE(sm,n) SM_SET_NTH_T_FLAG(sm,n,T_BASE_FLAG) |
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#define SM_SET_NTH_T_NEW(sm,n) SM_SET_NTH_T_FLAG(sm,n,T_NEW_FLAG) |
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#define SM_SET_NTH_T_BG(sm,n) SM_SET_NTH_T_FLAG(sm,n,T_BG_FLAG) |
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#define SM_CLR_NTH_T_ACTIVE(sm,n) SM_CLR_NTH_T_FLAG(sm,n,T_ACTIVE_FLAG) |
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#define SM_CLR_NTH_T_BASE(sm,n) SM_CLR_NTH_T_FLAG(sm,n,T_BASE_FLAG) |
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#define SM_CLR_NTH_T_NEW(sm,n) SM_CLR_NTH_T_FLAG(sm,n,T_NEW_FLAG) |
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#define SM_CLR_NTH_T_BG(sm,n) SM_CLR_NTH_T_FLAG(sm,n,T_BG_FLAG) |
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#define SM_NTH_TRI(m,n) (&(SM_TRIS(m)[(n)])) |
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#define SM_NTH_VERT(m,n) (SM_VERTS(m)[(n)]) |
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#define SM_T_ID_VALID(s,t_id) T_IS_VALID(SM_NTH_TRI(s,t_id)) |
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#define SM_MAX_SAMP(m) S_MAX_SAMP(SM_SAMP(m)) |
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#define SM_MAX_POINTS(m) S_MAX_POINTS(SM_SAMP(m)) |
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#define SM_SAMP_BASE(m) S_BASE(SM_SAMP(m)) |
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#define SM_NTH_WV(m,i) S_NTH_W_PT(SM_SAMP(m),i) |
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#define SM_NTH_W_DIR(m,i) S_NTH_W_DIR(SM_SAMP(m),i) |
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#define SM_DIR_ID(m,i) (!SM_BASE_ID(m,i) && SM_NTH_W_DIR(m,i)==-1) |
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#define SM_NTH_RGB(m,i) S_NTH_RGB(SM_SAMP(m),i) |
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#define SM_RGB(m) S_RGB(SM_SAMP(m)) |
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#define SM_WP(m) S_W_PT(SM_SAMP(m)) |
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#define SM_BRT(m) S_BRT(SM_SAMP(m)) |
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#define SM_NTH_BRT(m,i) S_NTH_BRT(SM_SAMP(m),i) |
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#define SM_CHR(m) S_CHR(SM_SAMP(m)) |
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#define SM_NTH_CHR(m,i) S_NTH_CHR(SM_SAMP(m),i) |
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#define SM_NUM_SAMP(m) S_NUM_SAMP(SM_SAMP(m)) |
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#define SM_TONE_MAP(m) S_TONE_MAP(SM_SAMP(m)) |
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#define SM_ALLOWED_VIEW_CHANGE(m) (SM_NUM_SAMP(m)/smDist_sum*SM_VIEW_FRAC) |
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#define SM_FOR_ALL_ADJACENT_TRIS(sm,id,t) for(t=smTri_next_ccw_nbr(sm,t,id); \ |
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t!=SM_NTH_TRI(sm,SM_NTH_VERT(sm,id)); t=smTri_next_ccw_nbr(sm,t,id)) |
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#define SM_INVALID_SAMP_ID(sm,id) (((id) < 0) || ((id) >= SM_MAX_SAMP(sm))) |
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#define SM_INVALID_POINT_ID(sm,id) (((id) < 0) || ((id) >= SM_MAX_POINTS(sm))) |
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#define SM_T_NTH_WV(sm,t,i) (SM_NTH_WV(sm,T_NTH_V(t,i))) |
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#define SM_BASE_ID(s,i) \ |
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((i) >= S_MAX_SAMP(SM_SAMP(s)) && (i) < S_MAX_BASE_PT(SM_SAMP(s))) |
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#define SM_BG_SAMPLE(sm,i) (SM_NTH_W_DIR(sm,i)==-1) |
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#define SM_BG_TRI(sm,i) (SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),0)) && \ |
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SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),1)) && \ |
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SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),2))) |
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#define SM_MIXED_TRI(sm,i) (SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),0)) || \ |
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SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),1)) || \ |
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SM_BG_SAMPLE(sm,T_NTH_V(SM_NTH_TRI(sm,i),2))) |
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#define SM_FOR_ALL_SAMPLES(sm,i) for((i)=0;i < SM_NUM_SAMP(sm);(i)++) |
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#define smInit_locator(sm,c) (stInit(SM_LOCATOR(sm)), \ |
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ST_SET_CENTER(SM_LOCATOR(sm),c)) |
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#define smClear_locator(sm) stClear(SM_LOCATOR(sm)) |
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#define smAlloc_locator(sm) stAlloc(SM_LOCATOR(sm)) |
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#define smFree_locator(sm) stClear(SM_LOCATOR(sm)) |
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#define smPointLocateCell(sm,pt) stPoint_locate(SM_LOCATOR(sm),pt) |
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#define smUnalloc_samp(sm,id) sUnalloc_samp(SM_SAMP(sm),id) |
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#define smFree_samples(sm) sFree(SM_SAMP(sm)) |
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#define smClear_samples(sm) sClear(SM_SAMP(sm)) |
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#define smInit_samples(sm) sInit(SM_SAMP(sm)) |
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#define smClear_vert(sm,id) (SM_NTH_VERT(sm,id) = INVALID) |
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typedef struct _RT_ARGS_{ |
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FVECT orig,dir; |
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int t_id; |
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OBJECT *os; |
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}RT_ARGS; |
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typedef struct _ADD_ARGS { |
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int t_id; |
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OBJECT *del_set; |
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}ADD_ARGS; |
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|
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extern SM *smMesh; |
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extern int smNew_tri_cnt; |
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extern double smDist_sum; |
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#ifdef TEST_DRIVER |
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extern VIEW View; |
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extern VIEW Current_View; |
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extern int Pick_tri,Picking,Pick_samp; |
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extern FVECT Pick_point[500],Pick_origin,Pick_dir; |
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extern FVECT Pick_v0[500],Pick_v1[500],Pick_v2[500]; |
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extern int Pick_q[500]; |
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extern FVECT P0,P1,P2; |
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extern int Pick_cnt; |
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extern FVECT FrustumNear[4],FrustumFar[4]; |
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#endif |
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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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* Initialize sampL and other data structures for at least n samples. |
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* If n is 0, then free data structures. Return number actually allocated. |
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* |
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* |
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* int |
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* smNewSamp(c, p, v) : register new sample point and return index |
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* COLR c; : pixel color (RGBE) |
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* FVECT p; : world intersection point |
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* FVECT v; : ray direction vector |
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* |
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* Add new sample point to data structures, removing old values as necessary. |
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* New sample representation will be output in next call to smUpdate(). |
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* |
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* |
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* int |
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* smFindSamp(orig, dir): intersect ray with 3D rep. and find closest sample |
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* FVECT orig, dir; |
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* |
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* Find the closest sample to the given ray. Return -1 on failure. |
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* |
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* |
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* smClean() : display has been wiped clean |
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* |
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* Called after display has been effectively cleared, meaning that all |
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* geometry must be resent down the pipeline in the next call to smUpdate(). |
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* |
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* |
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* smUpdate(vp, qua) : update OpenGL output geometry for view vp |
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* VIEW *vp; : desired view |
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* int qua; : quality level (percentage on linear time scale) |
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* |
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* Draw new geometric representation using OpenGL calls. Assume that the |
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* view has already been set up and the correct frame buffer has been |
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* selected for drawing. The quality level is on a linear scale, where 100% |
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* is full (final) quality. It is not necessary to redraw geometry that has |
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* been output since the last call to smClean(). (The last view drawn will |
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* be vp==&odev.v each time.) |
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*/ |
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#endif |
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