1 | #include <cmath> |
1 | #include <cmath> |
2 | |
2 | |
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3 | #include "opengl.h" |
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4 | |
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5 | #include "view.h" |
3 | #include "oct.h" |
6 | #include "oct.h" |
4 | #include "view.h" |
7 | #include "material.h" |
5 | |
8 | |
6 | draw_context::draw_context (view &v) |
9 | using namespace gl; |
7 | : v(v), l(0), mode(LIGHTED) |
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8 | { |
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9 | } |
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10 | |
10 | |
11 | draw_context::~draw_context () |
11 | pass_data pass_depth (0, DEPTH); |
12 | { |
12 | pass_data pass_postdepth (0, POSTDEPTH); |
13 | } |
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14 | |
13 | |
15 | bool draw_context::may_draw (entity_base *e) |
14 | vector<GLuint> occ_query_objects; |
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15 | |
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16 | static GLuint begin_occ_query () |
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17 | { |
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18 | GLuint id; |
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19 | |
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20 | if (occ_query_objects.size ()) |
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21 | { |
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22 | id = *(occ_query_objects.end () - 1); |
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23 | occ_query_objects.pop_back (); |
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24 | } |
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25 | else |
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26 | glGenQueries (1, &id); |
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27 | |
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28 | glBeginQuery (GL_SAMPLES_PASSED, id); |
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29 | return id; |
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30 | } |
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31 | |
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32 | inline void end_occ_query () |
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33 | { |
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34 | glEndQuery (GL_SAMPLES_PASSED); |
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35 | } |
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36 | |
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37 | static GLuint occ_query_result (GLuint id) |
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38 | { |
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39 | GLuint count; |
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40 | |
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41 | glGetQueryObjectuiv (id, GL_QUERY_RESULT, &count); |
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42 | occ_query_objects.push_back (id); |
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43 | |
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44 | return count; |
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45 | } |
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46 | |
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47 | view::view () |
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48 | : gamma(1.0), nz_near (1.F), nz_far (2.F) |
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49 | { |
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50 | } |
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51 | |
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52 | view::~view () |
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53 | { |
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54 | } |
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55 | |
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56 | void view::begin_occ_query (recv_occ_query &recv, void *id) |
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57 | { |
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58 | occ_queries.push_back (oq_data (&recv, ::begin_occ_query (), id)); |
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59 | } |
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60 | |
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61 | void view::end_occ_query () |
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62 | { |
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63 | ::end_occ_query (); |
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64 | } |
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65 | |
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66 | struct occ_query_material : material |
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67 | { |
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68 | void vsh (view &ctx); |
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69 | void fsh (view &ctx); |
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70 | }; |
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71 | |
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72 | static struct occ_query_material occ_query_material; |
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73 | |
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74 | void occ_query_material::vsh (view &ctx) |
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75 | { |
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76 | std_vsh (); |
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77 | } |
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78 | |
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79 | void occ_query_material::fsh (view &ctx) |
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80 | { |
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81 | // nop |
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82 | } |
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83 | |
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84 | bool view::may_draw (const entity *e) |
16 | { |
85 | { |
17 | if (drawn.find (e) != drawn.end ()) |
86 | if (drawn.find (e) != drawn.end ()) |
18 | return false; |
87 | return false; |
19 | |
88 | |
20 | drawn.insert (e); |
89 | drawn.insert (e); |
21 | return true; |
90 | return true; |
22 | } |
91 | } |
23 | |
92 | |
24 | void view::draw (draw_context &ctx) |
93 | visibility_base *visible::get_visibility (view &ctx) |
25 | { |
94 | { |
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95 | view::visibility_map::iterator i = ctx.vismap.find (this); |
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96 | visibility_base *vs; |
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97 | |
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98 | if (i == ctx.vismap.end ()) |
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99 | { |
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100 | vs = new_visibility (); |
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101 | ctx.vismap.insert (view::visibility_map::value_type (this, vs)); |
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102 | } |
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103 | else |
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104 | { |
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105 | vs = i->second; |
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106 | |
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107 | if (vs->generation != ctx.generation) |
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108 | { |
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109 | if (vs->generation + 1 != ctx.generation) |
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110 | clear_visibility (vs); |
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111 | |
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112 | vs->generation = ctx.generation; |
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113 | } |
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114 | } |
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115 | |
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116 | return vs; |
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117 | } |
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118 | |
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119 | void view::reset_projection () |
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120 | { |
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121 | renormalize (orig, p); |
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122 | |
26 | glViewport (0, 0, w, h); |
123 | glViewport (0, 0, w, h); |
27 | |
124 | |
28 | glMatrixMode (GL_PROJECTION); |
125 | glMatrixMode (GL_PROJECTION); |
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126 | |
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127 | GLdouble aspect = (GLdouble)w/h; |
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128 | GLdouble ftan = tanf (fov * GLfloat (.5 * M_PI / 180.)); |
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129 | GLdouble ymax = ftan; |
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130 | GLdouble xmax = ymax * aspect; |
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131 | |
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132 | matrix perspective; |
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133 | { |
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134 | matrix &m = perspective; |
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135 | |
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136 | m(0,0) = 1.F / xmax; m(0,1) = 0; m(0,2) = 0; m(0,3) = 0; |
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137 | m(1,0) = 0; m(1,1) = 1.F / ymax; m(1,2) = 0; m(1,3) = 0; |
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138 | m(2,0) = 0; m(2,1) = 0; m(2,2) = -1e10F / z_far; m(2,3) = 1; |
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139 | m(3,0) = 0; m(3,1) = 0; m(3,2) = -1; m(3,3) = 0; |
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140 | |
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141 | glLoadMatrixf (perspective); |
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142 | } |
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143 | //glFrustum (-xmax, xmax, -ymax, ymax, z_near, z_far); |
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144 | |
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145 | glGetFloatv (GL_PROJECTION_MATRIX, perspective); |
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146 | |
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147 | perspfact = z_near / ymax * 0.5F * h; |
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148 | |
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149 | glMatrixMode (GL_MODELVIEW); |
29 | glLoadIdentity (); |
150 | glLoadIdentity (); |
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151 | matrix &m = projection; |
30 | |
152 | |
31 | GLdouble aspect = (GLdouble)w/h; |
153 | d = normalize (d);//D |
32 | GLdouble zNear = 0.0001; |
154 | u = normalize (u);//D |
33 | GLdouble zFar = 1000.; |
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34 | |
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35 | GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
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36 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
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37 | |
155 | |
38 | vec3 rz = -d; |
156 | vec3 rz = -d; |
39 | vec3 rx = cross (u, rz); |
157 | vec3 rx = cross (u, rz); |
40 | vec3 ry = cross (rz, rx); |
158 | vec3 ry = cross (rz, rx); |
41 | |
159 | |
42 | GLfloat m[4][4]; |
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43 | m[0][0] = rx.x; m[0][1] = rx.y; m[0][2] = rx.z; m[0][3] = 0; |
160 | m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0; |
44 | m[1][0] = ry.x; m[1][1] = ry.y; m[1][2] = ry.z; m[1][3] = 0; |
161 | m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0; |
45 | m[2][0] = rz.x; m[2][1] = rz.y; m[2][2] = rz.z; m[2][3] = 0; |
162 | m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0; |
46 | m[3][0] = 0; m[3][1] = 0; m[3][2] = 0; m[3][3] = 1; |
163 | m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1; |
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164 | |
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165 | diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z); |
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166 | //printf ("diagfact = %f\n", diagfact); |
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167 | diagfact = sqrtf (3.);//D WHY??? |
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168 | |
47 | glMultMatrixf ((GLfloat *)m); |
169 | glMultMatrixf (m); |
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170 | |
48 | glTranslatef (-p.x, -p.y, -p.z); |
171 | glTranslatef (-p.x, -p.y, -p.z); |
49 | |
172 | |
50 | glMatrixMode (GL_MODELVIEW); |
173 | glGetFloatv (GL_MODELVIEW_MATRIX, m); |
51 | glLoadIdentity (); |
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52 | |
174 | |
53 | world.draw (ctx); |
175 | m = perspective * m; |
54 | } |
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55 | |
176 | |
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177 | 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) ); |
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178 | 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) ); |
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179 | 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) ); |
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180 | 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) ); |
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181 | 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) ); |
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182 | 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) ); |
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183 | |
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184 | #if 0 |
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185 | { |
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186 | GLdouble frustlen = z_far - z_near; |
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187 | GLdouble fheight = frustlen * ftan; |
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188 | GLdouble fwidth = fheight * w / h; |
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189 | point half (0, 0, z_near + frustlen * .5); |
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190 | point corner (fwidth, fheight, frustlen); |
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191 | |
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192 | frustum.s = sphere (p + d * (.5 * frustlen), length (corner - half)); |
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193 | } |
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194 | #endif |
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195 | |
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196 | { |
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197 | GLdouble depth = h / ftan; |
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198 | |
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199 | frustum.c = cone (p, d, atan (sqrt (GLdouble (w * w + h * h)) * ftan / h)); |
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200 | } |
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201 | } |
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202 | |
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203 | void view::begin () |
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204 | { |
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205 | generation++; |
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206 | |
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207 | vislist.clear (); |
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208 | |
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209 | z_near = max (nz_near, 1.F); |
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210 | z_far = max (nz_far, z_near * 2.F); |
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211 | c_far = nc_far; |
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212 | |
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213 | reset_projection (); |
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214 | |
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215 | nz_near = 100.; |
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216 | nc_far = nz_far = 1.F; |
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217 | |
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218 | first_lighted = false; |
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219 | } |
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220 | |
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221 | void view::end () |
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222 | { |
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223 | vislist.clear (); |
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224 | } |
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225 | |
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226 | #define DEPTH_OFFSET (1. / (GLdouble)(1L << 16)) |
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227 | |
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228 | void view::render (pass_data &pass) |
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229 | { |
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230 | this->pass = &pass; |
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231 | |
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232 | stat1 = stat2 = 0; //D |
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233 | |
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234 | switch (pass.type) |
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235 | { |
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236 | case DEPTH: |
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237 | glColorMask (1, 1, 1, 1); |
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238 | glDepthMask (1); |
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239 | glDisable (GL_BLEND); |
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240 | |
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241 | //glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); |
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242 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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243 | |
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244 | //glEnable (GL_STENCIL_TEST); // for depth-passes |
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245 | //glStencilOp (GL_KEEP, GL_KEEP, GL_REPLACE); |
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246 | //glStencilFunc (GL_LESS, 1, 255); |
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247 | |
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248 | //glEnable (GL_POLYGON_OFFSET_FILL); |
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249 | //glPolygonOffset (0, 5); |
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250 | glEnable (GL_CULL_FACE); |
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251 | glDisable (GL_MINMAX); |
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252 | glDepthRange (DEPTH_OFFSET, 1.); |
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253 | glDepthFunc (GL_LESS); |
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254 | glEnable (GL_DEPTH_TEST); |
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255 | glColorMask (0, 0, 0, 0); |
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256 | glDisable (GL_DEPTH_CLAMP_NV); |
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257 | |
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258 | world.detect_visibility (*this); |
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259 | |
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260 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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261 | (*i)->draw_depth (*this); |
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262 | |
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263 | if (pass.type == DEPTH) |
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264 | printf ("fps %f NF %f:%f vis %d,%d (%d,%d) CAM (%ld,%ld,%ld)\n", |
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265 | timer.fps, z_near, z_far, vislist.size (), drawn.size (), stat1, stat2, orig.x, orig.y, orig.z);//D |
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266 | |
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267 | break; |
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268 | |
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269 | case POSTDEPTH: |
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270 | glDepthRange (0., 1. - DEPTH_OFFSET); |
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271 | glDepthFunc (GL_LESS); |
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272 | glColorMask (0, 0, 0, 0); |
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273 | glDepthMask (0); |
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274 | glEnable (GL_DEPTH_CLAMP_NV); |
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275 | glDisable (GL_STENCIL_TEST); |
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276 | glDisable (GL_CULL_FACE); |
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277 | |
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278 | occ_query_material.enable (*this); |
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279 | |
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280 | // check occlusion queries |
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281 | for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i) |
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282 | { |
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283 | occ_query oq(*this, i->data, ::occ_query_result (i->id)); |
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284 | i->recv->event (oq); |
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285 | } |
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286 | |
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287 | occ_query_material.disable (*this); |
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288 | |
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289 | occ_queries.clear (); |
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290 | |
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291 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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292 | (*i)->draw_postdepth (*this); |
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293 | |
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294 | first_lighted = true; |
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295 | |
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296 | break; |
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297 | |
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298 | case LIGHTED: |
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299 | if (first_lighted) |
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300 | glDisable (GL_BLEND); |
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301 | else |
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302 | { |
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303 | glBlendFunc (GL_ONE, GL_ONE); |
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304 | glEnable (GL_BLEND); |
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305 | } |
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306 | |
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307 | //glClear (GL_STENCIL_BUFFER_BIT); |
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308 | //glEnable (GL_STENCIL_TEST); |
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309 | glEnable (GL_CULL_FACE); |
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310 | glEnable (GL_MINMAX); |
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311 | glDepthRange (0., 1. - DEPTH_OFFSET); |
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312 | glDepthFunc (GL_LESS); |
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313 | glColorMask (1, 1, 1, 1); |
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314 | glDepthMask (0); |
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315 | glDisable (GL_DEPTH_CLAMP_NV); |
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316 | |
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317 | for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i) |
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318 | (*i)->draw_lighted (*this); |
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319 | |
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320 | first_lighted = false; |
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321 | |
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322 | break; |
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323 | } |
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324 | |
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325 | drawn.clear (); |
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326 | } |
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327 | |
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328 | void light::enable () |
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329 | { |
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330 | lightpos->set (p); |
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331 | } |
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332 | |
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333 | void light::disable () |
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334 | { |
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335 | } |
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336 | |
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337 | static shader::varying_1f camdist; |
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338 | static shader::varying_3f lightvec; |
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339 | |
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340 | void linear_light::vsh () |
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341 | { |
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342 | using namespace shader::compile; |
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343 | |
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344 | lightvec = xyz (lightpos - model_view_matrix * vin.vertex); |
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345 | camdist = max (1 - length (lightvec) / radius, 0); |
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346 | |
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347 | fsh (); |
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348 | } |
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349 | |
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350 | void linear_light::fsh () |
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351 | { |
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352 | using namespace shader::compile; |
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353 | |
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354 | sh_lightvec = lightvec; |
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355 | sh_colour = float3 (c.r / 255.F, c.g / 255.F, c.b / 255.F) * (min (intensity * camdist * 100.F + 0.9F, 1.F)); |
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356 | } |
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357 | |
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358 | |