1 | #include <math.h> |
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2 | |
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3 | #include <osg/GL> |
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4 | #include <osg/Group> |
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5 | #include <osg/Geode> |
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6 | #include <osg/Geometry> |
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7 | #include <osg/Texture2D> |
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8 | #include <osg/TexEnv> |
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9 | #include <osg/StateSet> |
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10 | #include <osg/Matrix> |
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11 | |
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12 | #include <osgDB/ReadFile> |
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13 | |
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14 | #ifdef _MSC_VER |
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15 | #pragma warning( disable : 4244 ) |
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16 | #pragma warning( disable : 4305 ) |
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17 | #endif |
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18 | |
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19 | using namespace osg; |
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20 | |
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21 | extern void getDatabaseCenterRadius( float dbcenter[3], float *dbradius ); |
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22 | |
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23 | static float radius = 2.0; |
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24 | static float dbcenter[3], dbradius; |
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25 | |
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26 | static void conv( const Vec3& a, const Matrix& mat, Vec3& b ) |
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27 | { |
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28 | int i; |
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29 | Vec3 t; |
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30 | |
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31 | for( i = 0; i < 3; i++ ) |
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32 | { |
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33 | t[i] = (a[0] * mat(0,i)) + |
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34 | (a[1] * mat(1,i)) + |
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35 | (a[2] * mat(2,i)) + |
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36 | mat(3,i); |
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37 | } |
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38 | b[0] = t[0]; |
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39 | b[1] = t[1]; |
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40 | b[2] = t[2]; |
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41 | } |
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42 | |
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43 | |
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44 | Node *makeTank( void ) |
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45 | { |
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46 | |
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47 | Geode *geode = new Geode; |
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48 | |
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49 | getDatabaseCenterRadius( dbcenter, &dbradius ); |
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50 | |
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51 | Matrix mat( |
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52 | 0.05, 0, 0, 0, |
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53 | 0, 0.05, 0, 0, |
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54 | 0, 0, 0.05, 0, |
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55 | 1.5999 - 0.3, |
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56 | 3.1474, |
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57 | dbcenter[2] + 0.6542 - 0.09, |
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58 | 1 |
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59 | ); |
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60 | |
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61 | |
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62 | Vec3Array& vc = *(new Vec3Array(42+22)); |
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63 | Vec2Array& tc = *(new Vec2Array(42+22)); |
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64 | |
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65 | Geometry *gset = new Geometry; |
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66 | gset->setVertexArray( &vc ); |
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67 | gset->setTexCoordArray( 0, &tc ); |
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68 | |
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69 | |
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70 | unsigned int i, c = 0; |
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71 | for( i = 0; i <= 360; i += 18 ) |
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72 | { |
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73 | float x, y, z; |
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74 | float s, t; |
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75 | float theta = osg::DegreesToRadians((float)i); |
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76 | |
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77 | s = (float)i/90.0; |
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78 | t = 1.0; |
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79 | |
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80 | x = radius * cosf( theta ); |
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81 | y = radius * sinf( theta ); |
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82 | z = 1.0; |
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83 | |
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84 | vc[c][0] = x; |
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85 | vc[c][1] = y; |
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86 | vc[c][2] = z; |
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87 | |
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88 | tc[c][0] = s; |
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89 | tc[c][1] = t; |
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90 | |
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91 | c++; |
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92 | |
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93 | t = 0.0; |
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94 | z = 0.0; |
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95 | |
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96 | vc[c][0] = x; |
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97 | vc[c][1] = y; |
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98 | vc[c][2] = z; |
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99 | |
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100 | tc[c][0] = s; |
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101 | tc[c][1] = t; |
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102 | c++; |
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103 | } |
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104 | |
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105 | gset->addPrimitiveSet( new DrawArrays(PrimitiveSet::TRIANGLE_STRIP,0,c) ); |
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106 | |
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107 | |
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108 | |
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109 | int prev_c = c; |
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110 | |
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111 | vc[c][0] = 0.0f; |
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112 | vc[c][1] = 0.0f; |
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113 | vc[c][2] = 1.0f; |
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114 | |
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115 | tc[c][0] = 0.0f; |
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116 | tc[c][1] = 0.0f; |
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117 | c++; |
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118 | |
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119 | for( i = 0; i <= 360; i += 18 ) |
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120 | { |
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121 | float x, y, z; |
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122 | float s, t; |
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123 | float theta = osg::DegreesToRadians((float)i); |
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124 | |
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125 | |
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126 | |
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127 | s = cosf( theta ); |
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128 | t = sinf( theta ); |
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129 | |
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130 | x = radius * cosf( theta ); |
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131 | y = radius * sinf( theta ); |
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132 | z = 1.0; |
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133 | |
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134 | vc[c][0] = x; |
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135 | vc[c][1] = y; |
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136 | vc[c][2] = z; |
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137 | |
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138 | tc[c][0] = s; |
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139 | tc[c][1] = t; |
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140 | |
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141 | c++; |
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142 | } |
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143 | |
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144 | for( i = 0; i < c; i++ ) |
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145 | conv( vc[i], mat, vc[i] ); |
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146 | |
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147 | gset->addPrimitiveSet(new DrawArrays(PrimitiveSet::TRIANGLE_FAN,prev_c,c-prev_c)); |
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148 | |
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149 | |
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150 | |
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151 | |
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152 | Texture2D *tex = new Texture2D; |
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153 | |
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154 | tex->setWrap( Texture2D::WRAP_S, Texture2D::REPEAT ); |
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155 | tex->setWrap( Texture2D::WRAP_T, Texture2D::REPEAT ); |
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156 | tex->setImage(osgDB::readImageFile("Images/tank.rgb")); |
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157 | |
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158 | StateSet *dstate = new StateSet; |
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159 | dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON ); |
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160 | dstate->setTextureAttribute(0, new TexEnv ); |
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161 | |
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162 | gset->setStateSet( dstate ); |
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163 | geode->addDrawable( gset ); |
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164 | |
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165 | return geode; |
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166 | } |
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