| 1 | #include <cstdlib> |
1 | #include <cstdlib> |
| 2 | |
2 | |
|
|
3 | #include <vector> |
|
|
4 | |
|
|
5 | using namespace std; |
|
|
6 | |
|
|
7 | #define GL_GLEXT_PROTOTYPES |
|
|
8 | #include <GL/gl.h> |
|
|
9 | |
| 3 | #include "oct.h" |
10 | #include "oct.h" |
|
|
11 | #include "view.h" |
| 4 | #include "entity.h" |
12 | #include "entity.h" |
| 5 | |
13 | |
| 6 | octant world(0, 0); |
14 | vector<GLuint> occ_query_objects; |
| 7 | |
15 | |
| 8 | octant::octant (octant *parent, int subindex) |
16 | static GLuint begin_occ_query () |
| 9 | : parent(parent) |
17 | { |
|
|
18 | GLuint id; |
|
|
19 | |
|
|
20 | if (occ_query_objects.size ()) |
|
|
21 | { |
|
|
22 | id = *(occ_query_objects.end () - 1); |
|
|
23 | occ_query_objects.pop_back (); |
|
|
24 | } |
|
|
25 | else |
|
|
26 | glGenQueries (1, &id); |
|
|
27 | |
|
|
28 | glBeginQuery (GL_SAMPLES_PASSED, id); |
|
|
29 | return id; |
|
|
30 | } |
|
|
31 | |
|
|
32 | #define end_occ_query() glEndQuery (GL_SAMPLES_PASSED); |
|
|
33 | |
|
|
34 | static GLuint occ_query_result (GLuint id) |
|
|
35 | { |
|
|
36 | GLuint count; |
|
|
37 | |
|
|
38 | glGetQueryObjectuiv (id, GL_QUERY_RESULT, &count); |
|
|
39 | occ_query_objects.push_back (id); |
|
|
40 | |
|
|
41 | return count; |
|
|
42 | } |
|
|
43 | |
|
|
44 | octant world(0, sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN), MAXEXTENT); |
|
|
45 | |
|
|
46 | octant::octant (octant *parent, const sector &orig, uoffs extent) |
|
|
47 | : parent(parent), orig(orig), extent(extent) |
| 10 | { |
48 | { |
| 11 | for (fill = 8; fill--; ) |
49 | for (fill = 8; fill--; ) |
| 12 | sub[fill] = 0; |
50 | sub[fill] = 0; |
| 13 | |
|
|
| 14 | if (parent) |
|
|
| 15 | { |
|
|
| 16 | extent = (parent->extent + 1) >> 1; |
|
|
| 17 | orig = parent->orig; |
|
|
| 18 | orig.offset (subindex, extent); |
|
|
| 19 | } |
|
|
| 20 | else |
|
|
| 21 | { |
|
|
| 22 | extent = MAXEXTENT; |
|
|
| 23 | orig.x = orig.y = orig.z = SOFFS_MIN; |
|
|
| 24 | } |
|
|
| 25 | } |
51 | } |
| 26 | |
52 | |
| 27 | octant::~octant () |
53 | octant::~octant () |
| 28 | { |
54 | { |
| 29 | for (fill = 8; fill--; ) |
55 | for (fill = 8; fill--; ) |
| 30 | delete sub[fill]; |
56 | delete sub[fill]; |
| 31 | } |
57 | } |
| 32 | |
58 | |
| 33 | static bool overlap (const sector &o1, uoffs ea, const sector &o2, const box &bbox) |
59 | static bool overlap (const sector &o1, uoffs ea, const box &bbox) |
| 34 | { |
60 | { |
| 35 | sector a2; |
61 | sector a2, b2; |
| 36 | |
62 | |
| 37 | ea /= 2; |
63 | ea /= 2; |
| 38 | |
64 | |
| 39 | a2.x = o1.x + ea; |
65 | a2.x = o1.x + ea; |
| 40 | a2.y = o1.y + ea; |
66 | a2.y = o1.y + ea; |
| 41 | a2.z = o1.z + ea; |
67 | a2.z = o1.z + ea; |
| 42 | |
68 | |
| 43 | sector b2; |
69 | b2.x = (bbox.a.x + bbox.b.x) / 2; |
| 44 | sector eb; |
70 | b2.y = (bbox.a.y + bbox.b.y) / 2; |
|
|
71 | b2.z = (bbox.a.z + bbox.b.z) / 2; |
| 45 | |
72 | |
| 46 | b2.x = o2.x + (soffs)bbox.a.x; |
|
|
| 47 | b2.y = o2.y + (soffs)bbox.a.y; |
|
|
| 48 | b2.z = o2.z + (soffs)bbox.a.z; |
|
|
| 49 | |
|
|
| 50 | eb.x = (soffs)(bbox.b.x - bbox.a.x) / 2; |
|
|
| 51 | eb.y = (soffs)(bbox.b.y - bbox.a.y) / 2; |
|
|
| 52 | eb.z = (soffs)(bbox.b.z - bbox.a.z) / 2; |
|
|
| 53 | |
|
|
| 54 | b2.x += eb.x; |
|
|
| 55 | b2.y += eb.y; |
|
|
| 56 | b2.z += eb.z; |
|
|
| 57 | |
|
|
| 58 | return abs (a2.x - b2.x) <= ea + eb.x |
73 | return abs (a2.x - b2.x) <= ea + (bbox.b.x - bbox.a.x) |
| 59 | && abs (a2.y - b2.y) <= ea + eb.y |
74 | && abs (a2.y - b2.y) <= ea + (bbox.b.y - bbox.a.y) |
| 60 | && abs (a2.z - b2.z) <= ea + eb.z; |
75 | && abs (a2.z - b2.z) <= ea + (bbox.b.z - bbox.a.z); |
| 61 | } |
76 | } |
| 62 | |
77 | |
| 63 | void octant::add (const sector &sec, entity_base *e) |
78 | void octant::add (entity_base *e) |
| 64 | { |
79 | { |
| 65 | printf ("OCTANT %d,%d,%d+%d\n", orig.x, orig.y, orig.z, extent); |
80 | box bbox = translate (e->bbox, e->orig, sector (0, 0, 0)); |
| 66 | |
81 | |
|
|
82 | uoffs size = max (abs (bbox.b.x - bbox.a.x), |
|
|
83 | max (abs (bbox.b.y - bbox.a.y), |
|
|
84 | abs (bbox.b.z - bbox.a.z))); |
|
|
85 | |
| 67 | if (overlap (orig, extent, sec, e->bbox)) |
86 | if (overlap (orig, extent, bbox)) |
| 68 | { |
87 | { |
| 69 | printf ("overlap, add\n"); |
88 | uoffs extent2 = extent / 2; |
|
|
89 | |
|
|
90 | if (size > extent2 || !extent2) |
|
|
91 | { |
| 70 | push_back (e); |
92 | push_back (e); |
| 71 | e->o.push_back (this); |
93 | e->o.push_back (this); |
|
|
94 | return; |
|
|
95 | } |
| 72 | |
96 | |
|
|
97 | for (int i = 8; i--; ) |
|
|
98 | { |
|
|
99 | sector s = orig; |
|
|
100 | s.offset (i, extent2); |
|
|
101 | if (overlap (s, extent2, bbox)) |
|
|
102 | { |
|
|
103 | if (!sub[i]) |
|
|
104 | sub[i] = new octant (this, s, extent2); |
|
|
105 | |
|
|
106 | sub[i]->add (e); |
|
|
107 | } |
|
|
108 | } |
|
|
109 | } |
|
|
110 | } |
|
|
111 | |
|
|
112 | void octant::remove (entity_base *e) |
|
|
113 | { |
|
|
114 | } |
|
|
115 | |
|
|
116 | void octant::detect_visibility (view &ctx) |
|
|
117 | { |
|
|
118 | visibility_state &vs = ctx.vismap[this]; |
|
|
119 | |
|
|
120 | if (vs.generation != ctx.generation) |
|
|
121 | vs.visibility = visibility_state::UNKNOWN; |
|
|
122 | |
|
|
123 | const sector &cam = ctx.orig; |
|
|
124 | if (cam.x >= orig.x && cam.x <= orig.x + extent |
|
|
125 | && cam.y >= orig.y && cam.y <= orig.y + extent |
|
|
126 | && cam.z >= orig.z && cam.z <= orig.z + extent) |
|
|
127 | { |
|
|
128 | vs.visibility = visibility_state::PARTIAL; |
|
|
129 | vs.generation = ctx.generation; |
|
|
130 | } |
|
|
131 | else |
|
|
132 | { |
|
|
133 | point center ( |
|
|
134 | orig.x + (soffs)extent / 2 - cam.x, |
|
|
135 | orig.y + (soffs)extent / 2 - cam.y, |
|
|
136 | orig.z + (soffs)extent / 2 - cam.z |
|
|
137 | ); |
|
|
138 | |
|
|
139 | GLfloat dia = (0.5 * sqrtf (3))*(GLfloat)extent; |
|
|
140 | |
|
|
141 | if (ctx.frustum.t.distance (center) < -dia) return; |
|
|
142 | if (ctx.frustum.b.distance (center) < -dia) return; |
|
|
143 | if (ctx.frustum.l.distance (center) < -dia) return; |
|
|
144 | if (ctx.frustum.r.distance (center) < -dia) return; |
|
|
145 | if (ctx.frustum.n.distance (center) < -dia) return; |
|
|
146 | if (ctx.frustum.f.distance (center) < -dia) return; |
|
|
147 | } |
|
|
148 | |
|
|
149 | if (size ()) |
|
|
150 | ctx.vislist.push_back (this); |
|
|
151 | |
|
|
152 | // node to start with |
|
|
153 | unsigned char si = ctx.d.x < 0 ? 1 : 0 |
|
|
154 | | ctx.d.y < 0 ? 2 : 0 |
|
|
155 | | ctx.d.z < 0 ? 4 : 0; |
|
|
156 | |
|
|
157 | // bit-toggle to find next child for front-to-back order |
|
|
158 | static unsigned char next[8] |
|
|
159 | = { 0, 0^1, 1^2, 2^4, 4^3, 3^5, 5^6, 6^7 }; |
|
|
160 | |
|
|
161 | for (int i = 0; i < 8; i++) |
|
|
162 | { |
|
|
163 | si ^= next[i]; |
|
|
164 | |
|
|
165 | if (sub[si]) |
|
|
166 | sub[si]->detect_visibility (ctx); |
|
|
167 | } |
|
|
168 | |
|
|
169 | vs.generation = ctx.generation; |
|
|
170 | } |
|
|
171 | |
|
|
172 | void octant::display (view &ctx) |
|
|
173 | { |
| 73 | #if 0 |
174 | #if 0 |
| 74 | uoffs extent2 = extent / 2; |
175 | glBegin (GL_LINES); |
|
|
176 | sector s = orig; |
|
|
177 | s.x -= ctx.orig.x; |
|
|
178 | s.y -= ctx.orig.y; |
|
|
179 | s.z -= ctx.orig.z; |
|
|
180 | vec3 clr(0, 0.8, 0); |
|
|
181 | glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, (const GLfloat*)&clr); |
|
|
182 | |
| 75 | for (int si = 8; i--; ) |
183 | for (int i = 8; i--; ) |
|
|
184 | for (int ji = 3; ji--; ) |
| 76 | { |
185 | { |
| 77 | sector sub = orig; |
186 | int j = i | (1 << ji); |
| 78 | sub.offset (si, extent2); |
187 | if (i != j) |
| 79 | if (overlap (sub, extent2, sec, e->bbox)) |
|
|
| 80 | { |
188 | { |
|
|
189 | glVertex3i (s.x + !!(i & 1) * extent, |
|
|
190 | s.y + !!(i & 2) * extent, |
|
|
191 | s.z + !!(i & 4) * extent); |
|
|
192 | glVertex3i (s.x + !!(j & 1) * extent, |
|
|
193 | s.y + !!(j & 2) * extent, |
|
|
194 | s.z + !!(j & 4) * extent); |
| 81 | } |
195 | } |
|
|
196 | } |
|
|
197 | |
|
|
198 | glEnd (); |
|
|
199 | glDisable(GL_COLOR_MATERIAL); |
| 82 | #endif |
200 | #endif |
| 83 | } |
|
|
| 84 | else |
|
|
| 85 | printf ("no overlap\n"); |
|
|
| 86 | } |
|
|
| 87 | |
201 | |
| 88 | void octant::remove (entity_base *e) |
|
|
| 89 | { |
|
|
| 90 | } |
|
|
| 91 | |
|
|
| 92 | void octant::draw (draw_context &ctx) |
|
|
| 93 | { |
|
|
| 94 | for (iterator i = end (); i-- != begin (); ) |
202 | for (iterator i = end (); i != begin (); ) |
| 95 | (*i)->display (ctx); |
203 | (*--i)->display (ctx); |
| 96 | } |
204 | } |
| 97 | |
205 | |
|
|
206 | |
|
|
207 | |
