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Comparing libgender/oct.C (file contents):
Revision 1.56 by root, Sun Oct 17 09:43:07 2004 UTC vs.
Revision 1.74 by root, Sun Nov 7 03:28:20 2004 UTC

… …
7 7
8#include "oct.h" 8#include "oct.h"
9#include "view.h" 9#include "view.h"
10#include "entity.h" 10#include "entity.h"
11 11
12enum visibility_state { FULL, PARTIAL, SMALL, OCCLUDED }; 12enum visibility_state { FULL, PARTIAL, SMALL, OCCLUDED, SUBTREE_OCCLUDED };
13 13
14struct evis { 14struct evis {
15 visibility_state state; 15 visibility_state state;
16 double last; // time of last check 16 double last; // time of last check
17 evis () : last(0.), state(FULL) { }; 17 evis () : last(0.), state(FULL) { };
… …
48 48
49void octant::clear_visibility (visibility_base *vs) 49void octant::clear_visibility (visibility_base *vs)
50{ 50{
51 ((oct_visibility *)vs)->vismap.clear (); 51 ((oct_visibility *)vs)->vismap.clear ();
52} 52}
53
53octant::~octant () 54octant::~octant ()
54{ 55{
55 for (fill = 8; fill--; ) 56 for (fill = 8; fill--; )
56 delete sub[fill]; 57 delete sub[fill];
57} 58}
… …
105 106
106void octant::remove (entity *e) 107void octant::remove (entity *e)
107{ 108{
108} 109}
109 110
110bool octant::depth_pass (view &ctx) 111bool octant::detect_visibility (view &ctx)
111{ 112{
112 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx);
113
114 GLfloat extent2 = 0.5F * (GLfloat)extent; 113 GLfloat extent2 = 0.5F * (GLfloat)extent;
115 sector centeri = orig + (extent >> 1) - ctx.orig; 114 sector centeri = orig + (extent >> 1) - ctx.orig;
116 point centerf = point (centeri) + ((extent & 1) ? 0.5F : 0.F); 115 point centerf = point (centeri) + ((extent & 1) ? 0.5F : 0.F);
117 116
118 GLfloat rad = ctx.diagfact * extent2; 117 GLfloat rad = ctx.diagfact * extent2;
119 118
119 if (!overlap (ctx.frustum.c, sphere (centerf, rad)))
120 return false;
121
122 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx);
123
120 if (orig <= ctx.orig && ctx.orig <= orig + extent) 124 if (orig <= ctx.orig && ctx.orig <= orig + extent)
121 vs.state = PARTIAL; 125 vs.state = PARTIAL;
122 else 126 else
123 { 127 {
124 if (ctx.frustum.t.distance (centerf) < -rad) return false; 128 if (distance (ctx.frustum.t, centerf) < -rad) return false;
125 if (ctx.frustum.b.distance (centerf) < -rad) return false; 129 if (distance (ctx.frustum.b, centerf) < -rad) return false;
126 if (ctx.frustum.l.distance (centerf) < -rad) return false; 130 if (distance (ctx.frustum.l, centerf) < -rad) return false;
127 if (ctx.frustum.r.distance (centerf) < -rad) return false; 131 if (distance (ctx.frustum.r, centerf) < -rad) return false;
128 if (ctx.frustum.n.distance (centerf) < -rad) return false; 132 if (distance (ctx.frustum.n, centerf) < -rad) return false;
129 133
134#if 0
130 GLfloat fd = ctx.frustum.f.distance (centerf); 135 GLfloat fd = distance (ctx.frustum.f, centerf);
131 136
132 if (fd < -(ctx.c_far - ctx.z_far) -rad * 3.F) 137 if (fd < -(ctx.c_far - ctx.z_far) -rad * 3.F)
133 return false; 138 return false;
139#endif
134 } 140 }
135 141
142#if 0
136 if (vs.state == OCCLUDED) 143 if (vs.state == OCCLUDED && size ())
144 {
145 if (size ())
146 ctx.vislist.push_back (this);
147 return false;
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
137 return false; 153 return false;
138
139 GLfloat z = ctx.z_near + ctx.frustum.n.distance (centerf) + rad;
140 //printf ("z %f, perspfact %f, z*p %f\n", z, ctx.perspfact, ctx.perspfact / z); 154 //printf ("z %f, perspfact %f, z*p %f\n", z, ctx.perspfact, ctx.perspfact / z);
141 155
156#if 0
142 if (vs.state == PARTIAL || vs.state == FULL) 157 if (vs.state == PARTIAL || vs.state == FULL)
143 ctx.nc_far = max (ctx.nc_far, z); 158 ctx.nc_far = max (ctx.nc_far, z);
159#endif
160
161 if (vs.state == SUBTREE_OCCLUDED)
162 {
163 ctx.vislist.push_back (this);
164 return false;
165 }
166
167 bool visible = size () && (vs.state == PARTIAL || vs.state == FULL);
144 168
145 // node to start with 169 // node to start with
146 unsigned char si = centeri.x > 0 ? 1 : 0 170 unsigned char si = centeri.x > 0 ? 1 : 0
147 | centeri.y > 0 ? 2 : 0 171 | centeri.y > 0 ? 2 : 0
148 | centeri.z > 0 ? 4 : 0; 172 | centeri.z > 0 ? 4 : 0;
149 173
150 //printf ("si %d C %Ld,%Ld,%Ld\n", si, centeri.x, centeri.y, centeri.z);
151
152 // bit-toggle to find next child for front-to-back order 174 // bit-toggle to find next child for front-to-back order
153 static unsigned char toggle[8+1] 175 static unsigned char toggle[8+1]
154 = { 0, 0^1, 1^2, 2^4, 4^3, 3^5, 5^6, 6^7, 0 }; 176 = { 0, 0^1, 1^2, 2^4, 4^3, 3^5, 5^6, 6^7, 0 };
155 177
156 unsigned char *next = toggle; 178 unsigned char *next = toggle;
157 do 179 do
158 { 180 {
159 si ^= *next; 181 si ^= *next;
160 182
161 if (sub[si]) 183 if (sub[si])
162 sub[si]->depth_pass (ctx); 184 visible = visible | sub[si]->detect_visibility (ctx);
163 } 185 }
164 while (*++next); 186 while (*++next);
165 187
188 if (visible)
189 {
166 if (size () 190 if (size ())
167 && (vs.state == PARTIAL || vs.state == FULL)) 191 ctx.vislist.push_back (this);
168 { 192 }
169 ctx.nz_far = max (ctx.nz_far, z); 193 else
170 display (ctx); 194 {
195 vs.state = SUBTREE_OCCLUDED;
171 ctx.vislist.push_back (this); 196 ctx.vislist.push_back (this);
172 } 197 }
173 198
174 return true; 199 return visible;
175} 200}
176 201
177void octant::display (view &ctx) 202void octant::display (view &ctx)
178{ 203{
179#if 0
180 sector s = orig - ctx.orig;
181
182 glBegin (GL_LINES);
183 vec3 clr(0, 0.8, 0);
184 glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, (const GLfloat*)&clr);
185
186 for (int i = 8; i--; )
187 for (int ji = 3; ji--; )
188 {
189 int j = i | (1 << ji);
190 if (i < j)
191 {
192 glVertex3i (s.x + !!(i & 1) * extent,
193 s.y + !!(i & 2) * extent,
194 s.z + !!(i & 4) * extent);
195 glVertex3i (s.x + !!(j & 1) * extent,
196 s.y + !!(j & 2) * extent,
197 s.z + !!(j & 4) * extent);
198 }
199 }
200
201 glEnd ();
202#endif
203 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx); 204 oct_visibility &vs = *(oct_visibility *)get_visibility (ctx);
204 205
205 if (vs.state == OCCLUDED) 206 if (vs.state == OCCLUDED || vs.state == SUBTREE_OCCLUDED)
206 { 207 {
207 abort ();
208 if (ctx.pass == view::POSTDEPTH) 208 if (ctx.pass->type == POSTDEPTH)
209 {
210 if (!vb_bbox)
211 { 209 {
212 sector s = orig - ctx.orig;
213 gl::gen_bbox (vb_bbox, s, s + extent);
214 }
215
216 ctx.begin_occ_query (*this, 0); 210 ctx.begin_occ_query (*this, 0);
217 vb_bbox.draw (gl::bbox_mode, 0, gl::bbox_count); 211 sector s = orig - ctx.orig;
212 gl::draw_bbox (s, s + extent);
218 ctx.end_occ_query (); 213 ctx.end_occ_query ();
219 } 214 }
220 } 215 }
221 else 216 else
222 { 217 {
223 for (iterator i = end (); i != begin (); ) 218 int nvis = 0;
219
220 for (iterator i = begin (); i != end (); )
224 { 221 {
225 entity *e = *--i; 222 entity *e = *i++;
226
227 if (!ctx.may_draw (e))
228 continue;
229 223
230 evis &evs = vs.vismap[e]; 224 evis &evs = vs.vismap[e];
231 225
232 if (ctx.pass == view::POSTDEPTH) 226 if (ctx.pass->type == POSTDEPTH)
233 { 227 {
234 if (evs.state == OCCLUDED) 228 if (evs.state == OCCLUDED)
235 { 229 {
236 if (!e->vb_bbox)
237 gl::gen_bbox (e->vb_bbox, e->a - ctx.orig, e->b - ctx.orig);
238
239 ctx.begin_occ_query (*this, e); 230 ctx.begin_occ_query (*this, e);
240 e->vb_bbox.draw (gl::bbox_mode, 0, gl::bbox_count); 231 gl::draw_bbox (e->a - ctx.orig, e->b - ctx.orig);
241 ctx.end_occ_query (); 232 ctx.end_occ_query ();
242 } 233 }
234 else
235 nvis++;
243 } 236 }
244 else 237 else
245 { 238 {
239 if (!ctx.may_draw (e))
240 continue;
241
242
246 if (evs.state != OCCLUDED) 243 if (evs.state != OCCLUDED)
247 { 244 {
248 sector center = ((e->a + e->b) >> 1) - ctx.orig; 245 sector center = ((e->a + e->b) >> 1) - ctx.orig;
249 GLfloat z = norm (vec3 (center)); 246 GLfloat z = length (vec3 (center));
250 ctx.pixfact = ctx.perspfact / z; 247 ctx.pixfact = ctx.perspfact / z;
251 248
249 ctx.nz_far = max (ctx.nz_far, z + extent);
250 ctx.nz_near = min (ctx.nz_near, z - extent);
251
252 if (ctx.pass == view::DEPTH || evs.last + 1. > timer.now) 252 if (ctx.pass->type == DEPTH || evs.last + 0.1 > timer.now)
253 e->draw (ctx); 253 e->draw (ctx);
254 else 254 else
255 { 255 {
256 evs.last = timer.now; 256 evs.last = timer.now;
257 ctx.begin_occ_query (*this, e); 257 ctx.begin_occ_query (*this, e);
… …
259 ctx.end_occ_query (); 259 ctx.end_occ_query ();
260 } 260 }
261 } 261 }
262 } 262 }
263 } 263 }
264 }
265}
266 264
267#if 0 265#if 1
268void octant::draw_bbox (view &ctx) 266 if (ctx.pass->type == POSTDEPTH && nvis == 0 && size ())
269{ 267 vs.state = OCCLUDED;
270 sector s = orig - ctx.orig;
271
272 gl::draw_bbox (ctx, s, s + extent);
273}
274#endif 268#endif
269 }
270}
275 271
276void octant::event (occ_query &ev) 272void octant::event (occ_query &ev)
277{ 273{
278 oct_visibility &vs = *(oct_visibility *)get_visibility (ev.ctx); 274 oct_visibility &vs = *(oct_visibility *)get_visibility (ev.ctx);
279 entity *e = (entity *)ev.id; 275 entity *e = (entity *)ev.id;
… …
282 { 278 {
283 evis &evs = vs.vismap[e]; 279 evis &evs = vs.vismap[e];
284 evs.state = ev.count ? FULL : OCCLUDED; 280 evs.state = ev.count ? FULL : OCCLUDED;
285 } 281 }
286 else 282 else
287 {
288 vs.state = ev.count ? FULL : OCCLUDED; 283 vs.state = ev.count ? FULL : OCCLUDED;
289 }
290
291#if 0
292 visibility_state &vs = ev.v.vismap[this];
293
294 vs.last = timer.now;
295 vs.state = ev.r <= 0
296 ? visibility_state::OCCLUDED
297 : visibility_state::FULL;
298#endif
299} 284}
300 285
301 286

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