1 | #include <cmath> |
1 | #include <cmath> |
2 | |
2 | |
3 | #include <GL/gl.h> |
3 | #include "opengl.h" |
4 | #include <GL/glext.h> |
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5 | |
4 | |
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5 | #include "view.h" |
6 | #include "oct.h" |
6 | #include "oct.h" |
7 | #include "view.h" |
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8 | |
7 | |
9 | static GLenum gl_error; |
8 | using namespace gl; |
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9 | |
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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, void *id) |
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53 | { |
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54 | occ_queries.push_back (oq_data (&recv, ::begin_occ_query (), id)); |
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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 (const entity *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); |
25 | return true; |
68 | return true; |
26 | } |
69 | } |
27 | |
70 | |
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71 | visibility_base *visible::get_visibility (view &ctx) |
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72 | { |
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73 | view::visibility_map::iterator i = ctx.vismap.find (this); |
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74 | visibility_base *vs; |
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75 | |
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76 | if (i == ctx.vismap.end ()) |
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77 | { |
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78 | vs = new_visibility (); |
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79 | ctx.vismap.insert (view::visibility_map::value_type (this, vs)); |
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80 | } |
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81 | else |
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82 | { |
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83 | vs = i->second; |
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84 | |
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85 | if (vs->generation != ctx.generation) |
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86 | { |
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87 | if (vs->generation + 1 != ctx.generation) |
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88 | clear_visibility (vs); |
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89 | |
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90 | vs->generation = ctx.generation; |
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91 | } |
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92 | } |
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93 | |
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94 | return vs; |
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95 | |
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96 | } |
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97 | |
28 | void view::reset_projection () |
98 | void view::reset_projection () |
29 | { |
99 | { |
30 | renormalize (orig, p); |
100 | renormalize (orig, p); |
31 | |
101 | |
32 | glViewport (0, 0, w, h); |
102 | glViewport (0, 0, w, h); |
33 | |
103 | |
34 | glMatrixMode (GL_PROJECTION); |
104 | glMatrixMode (GL_PROJECTION); |
35 | glLoadIdentity (); |
105 | glLoadIdentity (); |
36 | |
106 | |
37 | gl_error = glGetError (); |
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38 | GLdouble aspect = (GLdouble)w/h; |
107 | GLdouble aspect = (GLdouble)w/h; |
39 | GLdouble zNear = 1.; |
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40 | GLdouble zFar = 500.; |
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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)); |
108 | GLdouble ymax = z_near * tan (fov * (M_PI / 360.0)); |
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109 | |
44 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
110 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far); |
45 | |
111 | |
46 | gl_error = glGetError (); |
112 | perspfact = z_near / ymax * 0.5 * (GLdouble)h; |
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113 | |
47 | d = normalize (d);//D |
114 | d = normalize (d);//D |
48 | u = normalize (u);//D |
115 | u = normalize (u);//D |
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116 | |
49 | vec3 rz = -d; |
117 | vec3 rz = -d; |
50 | vec3 rx = cross (u, rz); |
118 | vec3 rx = cross (u, rz); |
51 | vec3 ry = cross (rz, rx); |
119 | vec3 ry = cross (rz, rx); |
52 | gl_error = glGetError (); |
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53 | |
120 | |
54 | matrix &m = projection; |
121 | matrix &m = projection; |
55 | m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0; |
122 | 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; |
123 | 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; |
124 | 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; |
125 | 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 | |
126 | |
61 | glMultMatrixf ((GLfloat *)m.data); |
127 | diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z); |
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128 | //printf ("diagfact = %f\n", diagfact); |
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129 | diagfact = sqrtf (3.);//D WHY??? |
62 | |
130 | |
63 | gl_error = glGetError (); |
131 | glMultMatrixf (m); |
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132 | glTranslatef (-p.x, -p.y, -p.z); |
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133 | |
64 | glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m); |
134 | glGetFloatv (GL_PROJECTION_MATRIX, m); |
65 | |
135 | |
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) ); |
136 | 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) ); |
137 | 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) ); |
138 | 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) ); |
139 | 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) ); |
140 | 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) ); |
141 | 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 | |
142 | |
74 | gl_error = glGetError (); |
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75 | glMatrixMode (GL_MODELVIEW); |
143 | glMatrixMode (GL_MODELVIEW); |
76 | glLoadIdentity (); |
144 | glLoadIdentity (); |
77 | glTranslatef (-p.x, -p.y, -p.z); |
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78 | gl_error = glGetError (); |
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79 | } |
145 | } |
80 | |
146 | |
81 | void view::begin () |
147 | void view::begin () |
82 | { |
148 | { |
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149 | generation++; |
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150 | |
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151 | glColorMask (1, 1, 1, 1); |
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152 | glDepthMask (1); |
83 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
153 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
84 | glDepthRange (0, 1. - (1. / pow (2., 16.))); |
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85 | |
154 | |
86 | vismap.clear (); |
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87 | vislist.clear (); |
155 | vislist.clear (); |
88 | |
156 | |
89 | generation++; |
157 | z_far = nz_far; |
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158 | c_far = nc_far; |
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159 | |
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160 | if (z_far < z_near) |
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161 | z_far = z_near * 2.; |
90 | |
162 | |
91 | reset_projection (); |
163 | reset_projection (); |
92 | |
164 | |
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165 | nc_far = nz_far = z_near + 1.F; |
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166 | } |
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167 | |
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168 | void view::end () |
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169 | { |
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170 | vislist.clear (); |
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171 | } |
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172 | |
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173 | #define DEPTH_OFFSET (1. / (GLdouble)(1L << 16)) |
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174 | |
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175 | void view::render (enum pass p) |
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176 | { |
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177 | pass = p; |
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178 | |
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179 | switch (pass) |
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180 | { |
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181 | case DEPTH: |
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182 | //glEnable (GL_POLYGON_OFFSET_FILL); |
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183 | //glPolygonOffset (0, 5); |
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184 | glDisable (GL_MINMAX); |
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185 | glDepthRange (DEPTH_OFFSET, 1.); |
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186 | glDepthFunc (GL_LESS); |
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187 | glEnable (GL_DEPTH_TEST); |
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188 | glColorMask (0, 0, 0, 0); |
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189 | glDepthMask (1); |
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190 | |
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191 | world.depth_pass (*this); |
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192 | |
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193 | printf ("fps %f far %f cf %f vis %d CAM (%d,%d,%d)\n", timer.fps, z_far, c_far, drawn.size (), orig.x, orig.y, orig.z);//D |
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194 | break; |
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195 | |
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196 | case POSTDEPTH: |
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197 | glDepthRange (DEPTH_OFFSET, 1.); |
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198 | glDepthFunc (GL_LESS); |
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199 | glColorMask (0, 0, 0, 0); |
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200 | glDepthMask (0); |
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201 | |
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202 | // check occlusion queries |
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203 | for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i) |
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204 | { |
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205 | occ_query oq(*this, i->data, ::occ_query_result (i->id)); |
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206 | i->recv->event (oq); |
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207 | } |
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208 | |
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209 | occ_queries.clear (); |
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210 | |
93 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
211 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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212 | (*i)->display (*this); |
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213 | |
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214 | break; |
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215 | |
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216 | case LIGHTED: |
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217 | glEnable (GL_MINMAX); |
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218 | glDepthRange (0., 1. - DEPTH_OFFSET); |
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219 | glDepthFunc (GL_LESS); |
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220 | glColorMask (1, 1, 1, 1); |
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221 | glDepthMask (0); |
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222 | |
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223 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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224 | (*i)->display (*this); |
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225 | |
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226 | break; |
94 | ; |
227 | } |
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228 | |
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229 | drawn.clear (); |
95 | |
230 | |
96 | farlist.clear (); |
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97 | |
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98 | // check occlusion queries here |
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99 | #if 0 |
231 | #if 0 |
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232 | if (pass == view::DEPTH) |
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233 | { |
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234 | glEnable (GL_DEPTH_CLAMP_NV); |
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235 | glDepthMask (0); |
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236 | glDepthFunc (GL_LESS); |
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237 | |
100 | for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i) |
238 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
101 | //printf ("%p %d\n", *i, occ_query_result ((*i)->occ_query)); |
239 | { |
102 | occ_query_result ((*i)->occ_query); |
240 | begin_occ_query (**i); |
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241 | (*i)->draw_bbox (*this); |
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242 | end_occ_query (); |
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243 | } |
103 | |
244 | |
104 | checklist.clear (); |
245 | glDisable (GL_DEPTH_CLAMP_NV); |
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246 | } |
105 | #endif |
247 | #endif |
106 | |
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107 | world.detect_visibility (*this); |
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108 | } |
248 | } |
109 | |
249 | |
110 | void view::end () |
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111 | { |
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112 | vismap.clear (); |
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113 | } |
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114 | |
250 | |
115 | void view::pass (enum mode m) |
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116 | { |
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117 | mode = m; |
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118 | |
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119 | glDisable (GL_ALPHA_TEST); |
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120 | glDisable (GL_BLEND); |
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121 | |
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122 | if (mode == view::DEPTH) |
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123 | { |
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124 | glEnable (GL_POLYGON_OFFSET_FILL); |
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125 | glPolygonOffset (0, 1); |
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126 | glDepthFunc (GL_LESS); |
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127 | glDisable (GL_LIGHTING); |
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128 | glColorMask (0, 0, 0, 0); |
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129 | cgGLEnableProfile (vsh_profile);// z-fighting?? |
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130 | cgGLDisableProfile (fsh_profile); |
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131 | } |
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132 | else |
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133 | { |
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134 | glEnable (GL_MINMAX); |
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135 | glDisable (GL_POLYGON_OFFSET_FILL); |
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136 | glDepthFunc (GL_LESS); |
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137 | glDepthMask (0); |
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138 | cgGLEnableProfile (vsh_profile); |
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139 | cgGLEnableProfile (fsh_profile); |
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140 | } |
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141 | |
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142 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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143 | (*i)->display (*this); |
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144 | |
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145 | drawn.clear (); |
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146 | |
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147 | if (mode == view::DEPTH || 1) |
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148 | { |
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149 | glEnable (GL_DEPTH_CLAMP_NV); |
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150 | glDepthFunc (GL_LESS); |
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151 | if (1) glDepthFunc (GL_LEQUAL); |
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152 | glEnable (GL_COLOR_MATERIAL); |
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153 | glDisable (GL_LIGHTING); |
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154 | cgGLDisableProfile (vsh_profile); |
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155 | cgGLDisableProfile (fsh_profile); |
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156 | glShadeModel (GL_FLAT); |
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157 | |
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158 | #if 0 |
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159 | static int count; count++; |
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160 | if (farlist.size ()) |
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161 | printf ("%d: size %d\n", count, farlist.size ()); |
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162 | #endif |
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163 | |
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164 | for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i) |
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165 | { |
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166 | glColor3f (1,0,0); |
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167 | (*i)->draw_bbox (*this); |
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168 | } |
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169 | |
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170 | glEnable (GL_DEPTH_TEST); |
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171 | glDisable (GL_DEPTH_CLAMP_NV); |
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172 | glShadeModel (GL_SMOOTH); |
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173 | } |
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174 | |
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175 | glColorMask (1, 1, 1, 0); |
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176 | glDepthMask (1); |
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177 | |
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178 | } |
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179 | |
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180 | |
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