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Comparing libgender/oct.C (file contents):
Revision 1.48 by root, Sun Oct 10 14:15:15 2004 UTC vs.
Revision 1.67 by root, Thu Oct 28 22:29:29 2004 UTC

1#include <cstdlib> 1#include <cstdlib>
2 2
3#include <vector> 3#include <vector>
4
5using namespace std; 4using namespace std;
6 5
7#include "opengl.h" 6#include "opengl.h"
8 7
9#include "oct.h" 8#include "oct.h"
10#include "view.h" 9#include "view.h"
11#include "entity.h" 10#include "entity.h"
12 11
12enum visibility_state { FULL, PARTIAL, SMALL, OCCLUDED };
13
14struct evis {
15 visibility_state state;
16 double last; // time of last check
17 evis () : last(0.), state(FULL) { };
18};
19
20struct oct_visibility : visibility_base
21{
22 typedef map<entity *, evis> evismap;
23 evismap vismap;
24
25 visibility_state state;
26
27 oct_visibility (octant &oct)
28 : state(FULL)
29 {
30 }
31};
32
13octant world(0, sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN), MAXEXTENT); 33octant world(0, sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN), MAXEXTENT);
14 34
15octant::octant (octant *parent, const sector &orig, uoffs extent) 35octant::octant (octant *parent, const sector &orig, uoffs extent)
16: parent(parent), orig(orig), extent(extent) 36: parent(parent)
37, orig(orig)
38, extent(extent)
17{ 39{
18 for (fill = 8; fill--; ) 40 for (fill = 8; fill--; )
19 sub[fill] = 0; 41 sub[fill] = 0;
20} 42}
21 43
44visibility_base *octant::new_visibility ()
45{
46 return new oct_visibility (*this);
47}
48
49void octant::clear_visibility (visibility_base *vs)
50{
51 ((oct_visibility *)vs)->vismap.clear ();
52}
53
22octant::~octant () 54octant::~octant ()
23{ 55{
24 for (fill = 8; fill--; ) 56 for (fill = 8; fill--; )
25 delete sub[fill]; 57 delete sub[fill];
26} 58}
… …
29{ 61{
30 ea /= 2; 62 ea /= 2;
31 63
32 sector center_1 = o1 + ea; 64 sector center_1 = o1 + ea;
33 sector size_2 = b - a; 65 sector size_2 = b - a;
34 sector center_2 = a + size_2 / 2; 66 sector center_2 = a + (size_2 >> 1);
35 67
36 return abs (center_1 - center_2) <= ea + size_2; 68 return abs (center_1 - center_2) <= ea + size_2;
37} 69}
38 70
39void octant::add (entity *e) 71void octant::add (entity *e)
… …
41 const sector &a = e->a; 73 const sector &a = e->a;
42 const sector &b = e->b; 74 const sector &b = e->b;
43 75
44 if (overlap (orig, extent, a, b)) 76 if (overlap (orig, extent, a, b))
45 { 77 {
46 uoffs extent2 = extent / 2; 78 uoffs extent2 = extent >> 1;
47 uoffs size = max (abs (b - a)); 79 uoffs size = max (abs (b - a));
48 80
49 if (size > extent2 || !extent2) 81 if (size >= extent2 >> 1)
50 { 82 {
51 push_back (e); 83 push_back (e);
52 e->o.push_back (this); 84 e->o.push_back (this);
53 return; 85 return;
54 } 86 }
… …
59 s.offset (i, extent2); 91 s.offset (i, extent2);
60 92
61 if (overlap (s, extent2, a, b)) 93 if (overlap (s, extent2, a, b))
62 { 94 {
63 if (!sub[i]) 95 if (!sub[i])
96 {
64 sub[i] = new octant (this, s, extent2); 97 sub[i] = new octant (this, s, extent2);
98 fill++;
99 }
65 100
66 sub[i]->add (e); 101 sub[i]->add (e);
67 } 102 }
68 } 103 }
69 } 104 }
… …
71 106
72void octant::remove (entity *e) 107void octant::remove (entity *e)
73{ 108{
74} 109}
75 110
76void octant::detect_visibility (view &ctx) 111bool octant::detect_visibility (view &ctx)
77{ 112{
78 visibility_state &vs = ctx.vismap[this];
79
80 GLfloat extent2 = 0.5F * (GLfloat)extent; 113 GLfloat extent2 = 0.5F * (GLfloat)extent;
81 point center = point (orig + (extent >> 1) - ctx.orig); 114 sector centeri = orig + (extent >> 1) - ctx.orig;
82 if (extent & 1) center = center + 0.5F; 115 point centerf = point (centeri) + ((extent & 1) ? 0.5F : 0.F);
116
83 GLfloat rad = ctx.diagfact * extent2; 117 GLfloat rad = ctx.diagfact * extent2;
84 118
85 if (vs.generation + 1 != ctx.generation) 119 if (!overlap (ctx.frustum.c, sphere (centerf, rad)))
86 vs.visibility = visibility_state::UNKNOWN; 120 return false;
87 121
88 vs.generation = ctx.generation; 122 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx);
89 123
90 if (orig <= ctx.orig && ctx.orig <= orig + extent) 124 if (orig <= ctx.orig && ctx.orig <= orig + extent)
91 vs.visibility = visibility_state::PARTIAL; 125 vs.state = PARTIAL;
92 else 126 else
93 { 127 {
94 if (ctx.frustum.t.distance (center) < -rad) return; 128 if (distance (ctx.frustum.t, centerf) < -rad) return false;
95 if (ctx.frustum.b.distance (center) < -rad) return; 129 if (distance (ctx.frustum.b, centerf) < -rad) return false;
96 if (ctx.frustum.l.distance (center) < -rad) return; 130 if (distance (ctx.frustum.l, centerf) < -rad) return false;
97 if (ctx.frustum.r.distance (center) < -rad) return; 131 if (distance (ctx.frustum.r, centerf) < -rad) return false;
98 if (ctx.frustum.n.distance (center) < -rad) return; 132 if (distance (ctx.frustum.n, centerf) < -rad) return false;
99 133
134#if 0
100 GLfloat fd = ctx.frustum.f.distance (center); 135 GLfloat fd = distance (ctx.frustum.f, centerf);
101 136
102 if (fd < -(ctx.c_far - ctx.z_far) -rad * 3.F) 137 if (fd < -(ctx.c_far - ctx.z_far) -rad * 3.F)
103 return; 138 return false;
104 } 139#endif
105
106 if (vs.visibility == visibility_state::OCCLUDED
107 || vs.visibility == visibility_state::UNKNOWN)
108 { 140 }
141
142#if 1
143 if (vs.state == OCCLUDED)
144 {
145 if (size ())
109 ctx.farlist.push_back (this); 146 ctx.vislist.push_back (this);
110 return; 147 //return false;
111 } 148 }
149#endif
150
151 GLfloat z = ctx.z_near + distance (ctx.frustum.n, centerf) + rad;
152 if (ctx.perspfact * extent / z < 1.) // very crude "too small to see" check
153 return false;
154 //printf ("z %f, perspfact %f, z*p %f\n", z, ctx.perspfact, ctx.perspfact / z);
112 155
113#if 0 156#if 0
114 if (vs.visibility == visibility_state::UNKNOWN) 157 if (vs.state == PARTIAL || vs.state == FULL)
115 vs.visibility = visibility_state::FULL;
116#endif
117
118 GLfloat z = ctx.z_near + ctx.frustum.n.distance (center) + rad;
119
120 if (vs.visibility == visibility_state::FULL)
121 ctx.nc_far = max (ctx.nc_far, z); 158 ctx.nc_far = max (ctx.nc_far, z);
122 159#endif
123 if (size ()
124 && (vs.visibility == visibility_state::PARTIAL
125 || vs.visibility == visibility_state::FULL))
126 {
127 ctx.nz_far = max (ctx.nz_far, z);
128 ctx.vislist.push_back (this);
129 }
130 160
131 // node to start with 161 // node to start with
132 unsigned char si = ctx.d.x < 0 ? 1 : 0 162 unsigned char si = centeri.x > 0 ? 1 : 0
133 | ctx.d.y < 0 ? 2 : 0 163 | centeri.y > 0 ? 2 : 0
134 | ctx.d.z < 0 ? 4 : 0; 164 | centeri.z > 0 ? 4 : 0;
165
166 //printf ("si %d C %Ld,%Ld,%Ld\n", si, centeri.x, centeri.y, centeri.z);
135 167
136 // bit-toggle to find next child for front-to-back order 168 // bit-toggle to find next child for front-to-back order
137 static unsigned char next[8] 169 static unsigned char toggle[8+1]
138 = { 0, 0^1, 1^2, 2^4, 4^3, 3^5, 5^6, 6^7 }; 170 = { 0, 0^1, 1^2, 2^4, 4^3, 3^5, 5^6, 6^7, 0 };
139 171
140 for (int i = 0; i < 8; i++) 172 unsigned char *next = toggle;
173 do
141 { 174 {
142 si ^= next[i]; 175 si ^= *next;
143 176
144 if (sub[si]) 177 if (sub[si])
145 sub[si]->detect_visibility (ctx); 178 sub[si]->detect_visibility (ctx);
146 } 179 }
180 while (*++next);
181
182 if (size ()
183 && (vs.state == PARTIAL || vs.state == FULL || vs.state == OCCLUDED))
184 ctx.vislist.push_back (this);
185
186 return true;
147} 187}
148 188
149void octant::display (view &ctx) 189void octant::display (view &ctx)
150{ 190{
151#if 0 191#if 0
192 sector s = orig - ctx.orig;
193
152 glBegin (GL_LINES); 194 glBegin (GL_LINES);
153 sector s = orig - ctx.orig;
154 vec3 clr(0, 0.8, 0); 195 vec3 clr(0, 0.8, 0);
155 glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, (const GLfloat*)&clr); 196 glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, (const GLfloat*)&clr);
156 197
157 for (int i = 8; i--; ) 198 for (int i = 8; i--; )
158 for (int ji = 3; ji--; ) 199 for (int ji = 3; ji--; )
159 { 200 {
160 int j = i | (1 << ji); 201 int j = i | (1 << ji);
161 if (i != j) 202 if (i < j)
162 { 203 {
163 glVertex3i (s.x + !!(i & 1) * extent, 204 glVertex3i (s.x + !!(i & 1) * extent,
164 s.y + !!(i & 2) * extent, 205 s.y + !!(i & 2) * extent,
165 s.z + !!(i & 4) * extent); 206 s.z + !!(i & 4) * extent);
166 glVertex3i (s.x + !!(j & 1) * extent, 207 glVertex3i (s.x + !!(j & 1) * extent,
… …
169 } 210 }
170 } 211 }
171 212
172 glEnd (); 213 glEnd ();
173#endif 214#endif
215 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx);
174 216
175 for (iterator i = end (); i != begin (); ) 217 if (vs.state == OCCLUDED)
176 (*--i)->display (ctx); 218 {
177} 219 if (ctx.pass == view::POSTDEPTH)
178 220 {
179void octant::draw_bbox (view &ctx) 221 ctx.begin_occ_query (*this, 0);
180{
181 sector s = orig - ctx.orig; 222 sector s = orig - ctx.orig;
182
183 gl::draw_box (ctx, s, s + extent); 223 gl::draw_bbox (s, s + extent);
224 ctx.end_occ_query ();
225 }
226 }
227 else
228 {
229 int nvis = 0;
230
231 for (iterator i = begin (); i != end (); )
232 {
233 entity *e = *i++;
234
235 evis &evs = vs.vismap[e];
236
237 if (ctx.pass == view::POSTDEPTH)
238 {
239 if (evs.state == OCCLUDED)
240 {
241 ctx.begin_occ_query (*this, e);
242 gl::draw_bbox (e->a - ctx.orig, e->b - ctx.orig);
243 ctx.end_occ_query ();
244 }
245 else
246 nvis++;
247 }
248 else
249 {
250 if (!ctx.may_draw (e))
251 continue;
252
253
254 if (evs.state != OCCLUDED)
255 {
256 sector center = ((e->a + e->b) >> 1) - ctx.orig;
257 GLfloat z = length (vec3 (center));
258 ctx.pixfact = ctx.perspfact / z;
259
260 ctx.nz_far = max (ctx.nz_far, z + extent);
261 ctx.nz_near = min (ctx.nz_near, z - extent);
262
263 if (ctx.pass == view::DEPTH || evs.last + 0.3 > timer.now)
264 e->draw (ctx);
265 else
266 {
267 evs.last = timer.now;
268 ctx.begin_occ_query (*this, e);
269 e->draw (ctx);
270 ctx.end_occ_query ();
271 }
272 }
273 }
274 }
275
276#if 1
277 if (ctx.pass == view::POSTDEPTH && nvis == 0 && size ())
278 vs.state = OCCLUDED;
279#endif
280 }
184} 281}
185 282
186void octant::event (occ_query &ev) 283void octant::event (occ_query &ev)
187{ 284{
188 visibility_state &vs = ev.v.vismap[this]; 285 oct_visibility &vs = *(oct_visibility *)get_visibility (ev.ctx);
286 entity *e = (entity *)ev.id;
189 287
190 vs.last = timer.now; 288 if (e)
191 vs.visibility = ev.r <= 0 289 {
192 ? visibility_state::OCCLUDED 290 evis &evs = vs.vismap[e];
193 : visibility_state::FULL; 291 evs.state = ev.count ? FULL : OCCLUDED;
194 //if (extent > 0x16) 292 }
195 //printf ("OCT(%x,%x,%x+%x) samples %d\n", orig.x, orig.y, orig.z, extent, ev.r); 293 else
294 vs.state = ev.count ? FULL : OCCLUDED;
196} 295}
197 296
297

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