1 | #include <cmath> |
1 | #include <cmath> |
2 | |
2 | |
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3 | #define GL_GLEXT_PROTOTYPES |
3 | #include <GL/gl.h> |
4 | #include <GL/gl.h> |
4 | #include <GL/glext.h> |
5 | #include <GL/glext.h> |
5 | |
6 | |
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7 | #include "view.h" |
6 | #include "oct.h" |
8 | #include "oct.h" |
7 | #include "view.h" |
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8 | |
9 | |
9 | static GLenum gl_error; |
10 | vector<GLuint> occ_query_objects; |
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11 | |
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12 | static GLuint begin_occ_query () |
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13 | { |
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14 | GLuint id; |
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15 | |
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16 | if (occ_query_objects.size ()) |
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17 | { |
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18 | id = *(occ_query_objects.end () - 1); |
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19 | occ_query_objects.pop_back (); |
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20 | } |
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21 | else |
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22 | glGenQueriesARB (1, &id); |
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23 | |
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24 | glBeginQueryARB (GL_SAMPLES_PASSED, id); |
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25 | return id; |
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26 | } |
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27 | |
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28 | inline void end_occ_query () |
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29 | { |
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30 | glEndQueryARB (GL_SAMPLES_PASSED); |
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31 | } |
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32 | |
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33 | static GLuint occ_query_result (GLuint id) |
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34 | { |
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35 | GLuint count; |
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36 | |
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37 | glGetQueryObjectuivARB (id, GL_QUERY_RESULT, &count); |
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38 | occ_query_objects.push_back (id); |
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39 | |
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40 | return count; |
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41 | } |
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42 | |
10 | view::view () |
43 | view::view () |
11 | : gamma(1.0) |
44 | : gamma(1.0) |
12 | { |
45 | { |
13 | } |
46 | } |
14 | |
47 | |
15 | view::~view () |
48 | view::~view () |
16 | { |
49 | { |
17 | } |
50 | } |
18 | |
51 | |
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52 | void view::begin_occ_query (recv_occ_query &recv) |
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53 | { |
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54 | occ_queries.push_back (oq_data (&recv, ::begin_occ_query ())); |
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55 | } |
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56 | |
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57 | void view::end_occ_query () |
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58 | { |
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59 | ::end_occ_query (); |
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60 | } |
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61 | |
19 | bool view::may_draw (entity_base *e) |
62 | bool view::may_draw (const entity *e) |
20 | { |
63 | { |
21 | if (drawn.find (e) != drawn.end ()) |
64 | if (drawn.find (e) != drawn.end ()) |
22 | return false; |
65 | return false; |
23 | |
66 | |
24 | drawn.insert (e); |
67 | drawn.insert (e); |
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… | |
32 | glViewport (0, 0, w, h); |
75 | glViewport (0, 0, w, h); |
33 | |
76 | |
34 | glMatrixMode (GL_PROJECTION); |
77 | glMatrixMode (GL_PROJECTION); |
35 | glLoadIdentity (); |
78 | glLoadIdentity (); |
36 | |
79 | |
37 | gl_error = glGetError (); |
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38 | GLdouble aspect = (GLdouble)w/h; |
80 | GLdouble aspect = (GLdouble)w/h; |
39 | GLdouble zNear = 0.1; |
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40 | GLdouble zFar = 50.; |
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41 | |
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42 | gl_error = glGetError (); |
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43 | GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
81 | GLdouble ymax = z_near * tan (fov * (M_PI / 360.0)); |
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82 | |
44 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
83 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far); |
45 | |
84 | |
46 | gl_error = glGetError (); |
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47 | d = normalize (d);//D |
85 | d = normalize (d);//D |
48 | u = normalize (u);//D |
86 | u = normalize (u);//D |
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87 | |
49 | vec3 rz = -d; |
88 | vec3 rz = -d; |
50 | vec3 rx = cross (u, rz); |
89 | vec3 rx = cross (u, rz); |
51 | vec3 ry = cross (rz, rx); |
90 | vec3 ry = cross (rz, rx); |
52 | gl_error = glGetError (); |
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53 | |
91 | |
54 | matrix &m = projection; |
92 | matrix &m = projection; |
55 | m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0; |
93 | m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0; |
56 | m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0; |
94 | m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0; |
57 | m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0; |
95 | m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0; |
58 | m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1; |
96 | m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1; |
59 | gl_error = glGetError (); |
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60 | |
97 | |
61 | glMultMatrixf ((GLfloat *)m.data); |
98 | diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z); |
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99 | diagfact = sqrtf (3.);//D WHY??? |
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100 | //printf ("diagfact = %f\n", diagfact); |
62 | |
101 | |
63 | gl_error = glGetError (); |
102 | glMultMatrixf (m); |
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103 | glTranslatef (-p.x, -p.y, -p.z); |
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104 | |
64 | glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m); |
105 | glGetFloatv (GL_PROJECTION_MATRIX, m); |
65 | |
106 | |
66 | gl_error = glGetError (); |
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67 | frustum.l = plane ( m(3,0) + m(0,0), m(3,1) + m(0,1), m(3,2) + m(0,2), m(3,3) + m(0,3) ); |
107 | frustum.l = plane ( m(3,0) + m(0,0), m(3,1) + m(0,1), m(3,2) + m(0,2), m(3,3) + m(0,3) ); |
68 | frustum.r = plane ( m(3,0) - m(0,0), m(3,1) - m(0,1), m(3,2) - m(0,2), m(3,3) - m(0,3) ); |
108 | frustum.r = plane ( m(3,0) - m(0,0), m(3,1) - m(0,1), m(3,2) - m(0,2), m(3,3) - m(0,3) ); |
69 | frustum.b = plane ( m(3,0) + m(1,0), m(3,1) + m(1,1), m(3,2) + m(1,2), m(3,3) + m(1,3) ); |
109 | frustum.b = plane ( m(3,0) + m(1,0), m(3,1) + m(1,1), m(3,2) + m(1,2), m(3,3) + m(1,3) ); |
70 | frustum.t = plane ( m(3,0) - m(1,0), m(3,1) - m(1,1), m(3,2) - m(1,2), m(3,3) - m(1,3) ); |
110 | frustum.t = plane ( m(3,0) - m(1,0), m(3,1) - m(1,1), m(3,2) - m(1,2), m(3,3) - m(1,3) ); |
71 | frustum.n = plane ( m(3,0) + m(2,0), m(3,1) + m(2,1), m(3,2) + m(2,2), m(3,3) + m(2,3) ); |
111 | frustum.n = plane ( m(3,0) + m(2,0), m(3,1) + m(2,1), m(3,2) + m(2,2), m(3,3) + m(2,3) ); |
72 | frustum.f = plane ( m(3,0) - m(2,0), m(3,1) - m(2,1), m(3,2) - m(2,2), m(3,3) - m(2,3) ); |
112 | frustum.f = plane ( m(3,0) - m(2,0), m(3,1) - m(2,1), m(3,2) - m(2,2), m(3,3) - m(2,3) ); |
73 | |
113 | |
74 | gl_error = glGetError (); |
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75 | glMatrixMode (GL_MODELVIEW); |
114 | glMatrixMode (GL_MODELVIEW); |
76 | glLoadIdentity (); |
115 | glLoadIdentity (); |
77 | glTranslatef (-p.x, -p.y, -p.z); |
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78 | gl_error = glGetError (); |
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79 | } |
116 | } |
80 | |
117 | |
81 | void view::begin () |
118 | void view::begin () |
82 | { |
119 | { |
83 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
120 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
84 | glDepthRange (0, 1. - (1. / pow (2., 16.))); |
121 | glDepthRange (0, 1. - (1. / pow (2., 16.))); |
85 | |
122 | |
86 | vismap.clear (); |
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87 | vislist.clear (); |
123 | vislist.clear (); |
88 | |
124 | |
89 | generation++; |
125 | generation++; |
90 | |
126 | |
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127 | farlist.clear (); |
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128 | |
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129 | // check occlusion queries |
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130 | for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i) |
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131 | { |
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132 | occ_query oq(*this, i->second, occ_query_result (i->second)); |
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133 | i->first->event (oq); |
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134 | } |
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135 | |
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136 | occ_queries.clear (); |
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137 | |
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138 | z_far = nz_far; |
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139 | c_far = nc_far; |
91 | reset_projection (); |
140 | reset_projection (); |
92 | |
141 | |
93 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
142 | nc_far = nz_far = z_near + 1.F; |
94 | ; |
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95 | farlist.clear (); |
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96 | |
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97 | // check occlusion queries here |
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98 | #if 0 |
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99 | for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i) |
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100 | //printf ("%p %d\n", *i, occ_query_result ((*i)->occ_query)); |
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101 | occ_query_result ((*i)->occ_query); |
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102 | |
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103 | checklist.clear (); |
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104 | #endif |
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105 | |
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106 | world.detect_visibility (*this); |
143 | world.detect_visibility (*this); |
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144 | |
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145 | printf ("far %f cf %f RCP %f,%f,%f +%f\n", z_far, c_far, |
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146 | frustum.r.n.x, |
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147 | frustum.r.n.y, |
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148 | frustum.r.n.z, |
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149 | frustum.r.d |
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150 | );//D |
107 | } |
151 | } |
108 | |
152 | |
109 | void view::end () |
153 | void view::end () |
110 | { |
154 | { |
111 | vismap.clear (); |
155 | vislist.clear (); |
112 | } |
156 | } |
113 | |
157 | |
114 | void view::pass (enum mode m) |
158 | void view::pass (enum mode m) |
115 | { |
159 | { |
116 | mode = m; |
160 | mode = m; |
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123 | glEnable (GL_POLYGON_OFFSET_FILL); |
167 | glEnable (GL_POLYGON_OFFSET_FILL); |
124 | glPolygonOffset (0, 1); |
168 | glPolygonOffset (0, 1); |
125 | glDepthFunc (GL_LESS); |
169 | glDepthFunc (GL_LESS); |
126 | glDisable (GL_LIGHTING); |
170 | glDisable (GL_LIGHTING); |
127 | glColorMask (0, 0, 0, 0); |
171 | glColorMask (0, 0, 0, 0); |
128 | cgGLEnableProfile (vsh_profile);// z-fighting?? |
172 | cgGLDisableProfile (vsh_profile);// z-fighting?? |
129 | cgGLDisableProfile (fsh_profile); |
173 | cgGLDisableProfile (fsh_profile); |
130 | } |
174 | } |
131 | else |
175 | else |
132 | { |
176 | { |
133 | glEnable (GL_MINMAX); |
177 | glEnable (GL_MINMAX); |
134 | glDisable (GL_POLYGON_OFFSET_FILL); |
178 | glDisable (GL_POLYGON_OFFSET_FILL); |
135 | glDepthFunc (GL_LESS); |
179 | glDepthFunc (GL_LESS); |
136 | glDepthMask (0); |
180 | glDepthMask (1); |
137 | cgGLEnableProfile (vsh_profile); |
181 | cgGLEnableProfile (vsh_profile); |
138 | cgGLEnableProfile (fsh_profile); |
182 | cgGLEnableProfile (fsh_profile); |
139 | } |
183 | } |
140 | |
184 | |
141 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
185 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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186 | { |
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187 | visibility_state &vs = vismap[*i]; |
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188 | bool oq = mode == LIGHTED |
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189 | && vs.last + 1. < timer.now |
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190 | && (vs.visibility == visibility_state::PARTIAL |
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191 | || vs.visibility == visibility_state::FULL); |
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192 | |
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193 | if (oq) |
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194 | begin_occ_query (**i); |
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195 | |
142 | (*i)->display (*this); |
196 | (*i)->display (*this); |
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197 | |
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198 | if (oq) |
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199 | end_occ_query (); |
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200 | } |
143 | |
201 | |
144 | drawn.clear (); |
202 | drawn.clear (); |
145 | |
203 | |
146 | if (mode == view::LIGHTED) |
204 | if (mode == view::DEPTH) |
147 | { |
205 | { |
148 | glEnable (GL_DEPTH_CLAMP_NV); |
206 | glEnable (GL_DEPTH_CLAMP_NV); |
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207 | glDepthMask (0); |
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208 | glColorMask (0, 0, 0, 0); |
149 | glDepthFunc (GL_LESS); |
209 | glDepthFunc (GL_LESS); |
150 | glEnable (GL_COLOR_MATERIAL); |
210 | if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL); |
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211 | if (mode == view::LIGHTED) glColorMask (1, 1, 1, 0); |
151 | glDisable (GL_LIGHTING); |
212 | glDisable (GL_LIGHTING); |
152 | #if 1 |
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153 | cgGLDisableProfile (vsh_profile); |
213 | cgGLDisableProfile (vsh_profile); |
154 | cgGLDisableProfile (fsh_profile); |
214 | cgGLDisableProfile (fsh_profile); |
155 | #endif |
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156 | glShadeModel (GL_FLAT); |
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157 | |
215 | |
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216 | #if 0 |
158 | static int count; count++; |
217 | static int count; count++; |
159 | if (farlist.size ()) |
218 | if (farlist.size ()) |
160 | printf ("%d: size %d\n", count, farlist.size ()); |
219 | printf ("%d: size %d\n", count, farlist.size ()); |
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220 | #endif |
161 | |
221 | |
162 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
222 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
163 | { |
223 | { |
164 | glColor3f (1 / (GLfloat)(i - farlist.begin()), 1, 1 / (GLfloat)(i - farlist.begin())); |
224 | if (mode == view::DEPTH) begin_occ_query (**i); |
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225 | if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0); |
165 | (*i)->draw_bbox (*this); |
226 | (*i)->draw_bbox (*this); |
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227 | if (mode == view::DEPTH) end_occ_query (); |
166 | } |
228 | } |
167 | |
229 | |
168 | glEnable (GL_DEPTH_TEST); |
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169 | glDisable (GL_DEPTH_CLAMP_NV); |
230 | glDisable (GL_DEPTH_CLAMP_NV); |
170 | glShadeModel (GL_SMOOTH); |
231 | glDepthMask (1); |
171 | } |
232 | } |
172 | |
233 | |
173 | glColorMask (1, 1, 1, 0); |
234 | glColorMask (1, 1, 1, 0); |
174 | glDepthMask (1); |
235 | glDepthMask (1); |
175 | |
236 | |