1 | |
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2 | |
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3 | #include <osg/Geode> |
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4 | #include <osg/Geometry> |
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5 | #include <osg/Texture2D> |
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6 | #include <osg/TexEnv> |
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7 | #include <osg/StateSet> |
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8 | |
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9 | #include <osgDB/ReadFile> |
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10 | |
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11 | #include "terrain_coords.h" |
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12 | #include "terrain_texcoords.h" |
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13 | |
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14 | using namespace osg; |
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15 | |
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16 | void getDatabaseCenterRadius( float dbcenter[3], float *dbradius ) |
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17 | { |
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18 | int i; |
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19 | double n=0.0; |
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20 | double center[3] = { 0.0f, 0.0f, 0.0f }; |
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21 | float cnt; |
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22 | |
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23 | cnt = 39 * 38; |
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24 | for( i = 0; i < cnt; i++ ) |
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25 | { |
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26 | center[0] += (double)vertex[i][0]; |
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27 | center[1] += (double)vertex[i][1]; |
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28 | center[2] += (double)vertex[i][2]; |
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29 | |
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30 | n = n + 1.0; |
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31 | } |
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32 | |
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33 | center[0] /= n; |
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34 | center[1] /= n; |
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35 | center[2] /= n; |
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36 | |
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37 | float r = 0.0; |
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38 | |
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39 | |
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40 | for( i = 0; i < cnt; i++ ) |
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41 | { |
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42 | double d = sqrt( |
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43 | (((double)vertex[i][0] - center[0]) * ((double)vertex[i][0] - center[0])) + |
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44 | (((double)vertex[i][1] - center[1]) * ((double)vertex[i][1] - center[1])) + |
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45 | (((double)vertex[i][2] - center[2]) * ((double)vertex[i][2] - center[2])) ); |
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46 | |
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47 | if( d > (double)r ) r = (float)d; |
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48 | |
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49 | } |
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50 | |
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51 | *dbradius = r; |
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52 | dbcenter[0] = (float)center[0]; |
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53 | dbcenter[1] = (float)center[1]; |
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54 | dbcenter[2] = (float)center[2]; |
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55 | |
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56 | int index = 19 * 39 + 19; |
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57 | dbcenter[0] = vertex[index][0] - 0.15; |
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58 | dbcenter[1] = vertex[index][1]; |
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59 | dbcenter[2] = vertex[index][2] + 0.35; |
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60 | |
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61 | } |
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62 | |
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63 | |
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64 | Node *makeTerrain( void ) |
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65 | { |
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66 | int m, n; |
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67 | int i, j; |
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68 | float dbcenter[3]; |
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69 | float dbradius; |
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70 | |
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71 | getDatabaseCenterRadius( dbcenter, &dbradius ); |
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72 | |
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73 | m = (sizeof( vertex ) /(sizeof( float[3])))/39; |
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74 | n = 39; |
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75 | |
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76 | Vec3Array& v = *(new Vec3Array(m*n)); |
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77 | Vec2Array& t = *(new Vec2Array(m*n)); |
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78 | Vec4Array& col = *(new Vec4Array(1)); |
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79 | |
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80 | col[0][0] = col[0][1] = col[0][2] = col[0][3] = 1.0f; |
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81 | |
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82 | for( i = 0; i < m * n; i++ ) |
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83 | { |
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84 | v[i][0] = vertex[i][0] - dbcenter[0]; |
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85 | v[i][1] = vertex[i][1] - dbcenter[1]; |
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86 | v[i][2] = vertex[i][2]; |
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87 | |
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88 | t[i][0] = texcoord[i][0] + 0.025; |
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89 | t[i][1] = texcoord[i][1]; |
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90 | } |
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91 | |
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92 | Geometry *geom = new Geometry; |
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93 | |
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94 | geom->setVertexArray( &v ); |
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95 | geom->setTexCoordArray( 0, &t ); |
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96 | |
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97 | geom->setColorArray( &col ); |
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98 | geom->setColorBinding( Geometry::BIND_OVERALL ); |
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99 | |
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100 | for( i = 0; i < m-2; i++ ) |
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101 | { |
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102 | DrawElementsUShort* elements = new DrawElementsUShort(PrimitiveSet::TRIANGLE_STRIP); |
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103 | elements->reserve(39*2); |
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104 | for( j = 0; j < n; j++ ) |
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105 | { |
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106 | elements->push_back((i+0)*n+j); |
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107 | elements->push_back((i+1)*n+j); |
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108 | } |
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109 | geom->addPrimitiveSet(elements); |
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110 | } |
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111 | |
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112 | |
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113 | Texture2D *tex = new Texture2D; |
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114 | |
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115 | tex->setImage(osgDB::readImageFile("Images/lz.rgb")); |
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116 | |
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117 | StateSet *dstate = new StateSet; |
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118 | dstate->setMode( GL_LIGHTING, StateAttribute::OFF ); |
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119 | dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON ); |
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120 | dstate->setTextureAttribute(0, new TexEnv ); |
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121 | |
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122 | geom->setStateSet( dstate ); |
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123 | |
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124 | Geode *geode = new Geode; |
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125 | geode->addDrawable( geom ); |
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126 | |
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127 | return geode; |
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128 | } |
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