1 | #include "dxstdafx.h"
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2 | #include "resource.h"
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3 | #include <time.h>
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4 |
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5 | #include "Cube.h"
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6 | #include "Mesh.h"
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7 | #include "Parameters.h"
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8 | #include "EnvMap.h"
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9 |
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10 | //--------------------------------------------------------------------------------------
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11 | // Media
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12 | //--------------------------------------------------------------------------------------
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13 |
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14 | #define MESH0 L"Media\\Objects\\room.x"
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15 | #define MESH1 L"Media\\Objects\\sphere.x" // src: DirectX Samples
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16 | #define MESH2 L"Media\\Objects\\column.x"
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17 | #define MESH3 L"Media\\Objects\\teapot.x" // src: DirectX Samples
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18 | #define MESH4 L"Media\\Objects\\ring.x" // src: DirectX Samples
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19 | #define MESH5 L"Media\\Objects\\lamp01.x" // src: 3dcafe
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20 | #define MESH6 L"Media\\Objects\\happy.x" // src: Stanford Repository
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21 | #define MESH7 L"Media\\Objects\\dragon.x" // src: Stanford Repository
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22 | #define MESH8 L"Media\\Objects\\bunny.x" // src: Stanford Repository
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23 | #define MESH9 L"Media\\Objects\\skullocc.x" // src: DirectX Samples
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24 |
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25 | #define TEX0 L"Media\\Maps\\white.png"
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26 | #define TEX1 L"Media\\Maps\\pixel-grid-gy.png"
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27 | #define TEX2 L"Media\\Maps\\fire.jpg" // src: astronomy.swin.edu.au/~pbourke/texture/fire
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28 | #define ROOM_TEXTURE L"Media\\Maps\\pixel-grid-b.png"
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29 |
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30 | //--------------------------------------------------------------------------------------
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31 | // Constants
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32 | //--------------------------------------------------------------------------------------
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33 |
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34 | /// size of the cube map taken from the reference point of the object
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35 | #define CUBEMAP_SIZE 128 // 256
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36 | /// size of the cube map for diffuse/glossy reflections
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37 | int LR_CUBEMAP_SIZE = 2;
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38 |
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39 | /// Number of samples when precomputing geometric factors.
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40 | //#define M 25 // for production
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41 | #define M 10 // for runtime
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42 |
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43 | extern Parameters pp;
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44 | bool bPreproc = false;
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45 |
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46 | float eval( float cos_theta, float dw );
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47 | float evaluate( float dx, float dy )
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48 | {
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49 | return eval( 2*dx-1, dy*2*3.14159f ) / 3;
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50 | }
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51 |
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52 | /// Called by ::OnCreateDevice() (Main.cpp) to perform app-specific tasks.
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53 | void EnvMap::OnCreateDevice( IDirect3DDevice9* pd3dDevice, ID3DXEffect* g_pEffect )
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54 | {
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55 | this->pd3dDevice = pd3dDevice;
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56 | this->g_pEffect = g_pEffect;
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57 |
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58 | // init centralMesh array
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59 | meshCount = 0;
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60 | // room
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61 | meshes[meshCount++] = new Mesh(MESH0, TEX0, 0, D3DXVECTOR3(0,0,0)); // room
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62 |
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63 | // meshes[meshCount++] = new Mesh(MESH1, TEX2, 0.6, D3DXVECTOR3(0,-1.7,0)); // 1 fireball
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64 |
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65 | meshes[meshCount++] = new Mesh(MESH1, TEX2, 0.6, D3DXVECTOR3(1.5,0,1.5)); // fireballs
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66 | meshes[meshCount++] = new Mesh(MESH1, TEX2, 0.6, D3DXVECTOR3(1.5,0,-1.5));
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67 | meshes[meshCount++] = new Mesh(MESH1, TEX2, 0.6, D3DXVECTOR3(-1.5,0,1.5));
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68 | meshes[meshCount++] = new Mesh(MESH1, TEX2, 0.6, D3DXVECTOR3(-1.5,0,-1.5));
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69 |
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70 | // central centralMesh
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71 | centralMesh = new Mesh(MESH0, TEX0, pp.Get( fMeshScale )*2, D3DXVECTOR3(0,0,0));
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72 | centralMesh->SetContainerSize( D3DXVECTOR3(roomSize,roomSize,roomSize) );
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73 | centralMesh->SetMeshPosition( D3DXVECTOR3(-roomSize*2/3,0,0) );
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74 |
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75 | ChooseMesh( pp.GetInt( iWhichMesh ));
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76 |
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77 | bCubeMapIsValid = false;
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78 | }
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79 |
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80 | /// Called by ::OnDestroyDevice() (Main.cpp) to perform app-specific tasks.
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81 | void EnvMap::OnDestroyDevice()
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82 | {
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83 | // central centralMesh
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84 | delete centralMesh;
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85 |
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86 | // destroy centralMesh array
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87 | for (int i=0; i<meshCount; i++)
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88 | delete meshes[i];
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89 | meshCount = 0;
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90 |
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91 | SAFE_RELEASE( pCosValuesTexture );
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92 | }
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93 |
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94 | /// Called by ::OnResetDevice() (Main.cpp) to perform app-specific tasks.
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95 | void EnvMap::OnResetDevice()
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96 | {
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97 | // 1: mipmapping disabled, (1 level only)
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98 | // D3DX_DEFAULT: mipmapping enabled
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99 | V( D3DXCreateTextureFromFileExW( pd3dDevice, ROOM_TEXTURE,
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100 | D3DX_DEFAULT, D3DX_DEFAULT, 1/*1 or D3DX_DEFAULT=all*/, 0, D3DFMT_A16B16G16R16F, D3DPOOL_MANAGED,
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101 | D3DX_DEFAULT, D3DX_DEFAULT, 0, NULL, NULL,
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102 | &pRoomTexture ) );
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103 |
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104 | int exp = pp.GetInt( iResolution ) + 1; // 1..4
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105 | LR_CUBEMAP_SIZE = pow( 2, exp );
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106 |
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107 | pCubeTexture = CreateCubeTexture( CUBEMAP_SIZE, D3DFMT_A16B16G16R16F );
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108 | pCubeTextureSmall = CreateCubeTexture( LR_CUBEMAP_SIZE, D3DFMT_A16B16G16R16F );
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109 | pCubeTexturePreConvolved = CreateCubeTexture( LR_CUBEMAP_SIZE, D3DFMT_A16B16G16R16F );
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110 |
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111 | InitFullScreenQuad();
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112 | cube = new Cube(pd3dDevice);
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113 | }
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114 |
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115 | /// Called by ::OnLostDevice() (Main.cpp) to perform app-specific tasks.
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116 | void EnvMap::OnLostDevice()
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117 | {
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118 | SAFE_RELEASE( pRoomTexture );
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119 | //SAFE_RELEASE( pBoxTexture );
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120 | SAFE_RELEASE( pCubeTexture );
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121 | SAFE_RELEASE( pCubeTextureSmall );
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122 | SAFE_RELEASE( pCubeTexturePreConvolved );
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123 | // SAFE_RELEASE( pCosValuesTexture );
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124 | SAFE_RELEASE( pVertexBuffer ); // fullscreen quad
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125 | cube->Destroy();
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126 | delete cube;
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127 |
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128 | bCubeMapIsValid = false;
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129 | }
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130 |
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131 | /// Called when the resolution of the cube maps is to change.
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132 | /// To re-generate all resources, the DirectX device is simply reseted.
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133 | void EnvMap::InvalidateResolution()
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134 | {
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135 | if (!bCubeMapIsValid) return; // don't do anything during GUI initialization
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136 |
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137 | // rebuild textures
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138 | OnLostDevice(); // !!!!!
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139 | OnResetDevice(); // !!!!!
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140 | }
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141 |
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142 |
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143 | /// Loads the specified mesh.
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144 | void EnvMap::ChooseMesh(int whichMesh)
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145 | {
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146 | if (centralMesh == NULL) return;
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147 |
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148 | // redirect call from keyboard to parameter class
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149 | if ( pp.GetInt( iWhichMesh ) != whichMesh)
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150 | {
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151 | pp.SetInt( iWhichMesh, whichMesh );
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152 | return;
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153 | }
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154 |
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155 | switch (whichMesh)
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156 | {
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157 | case 0: centralMesh->Load(MESH0); break;
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158 | case 1: centralMesh->Load(MESH1); break;
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159 | case 2: centralMesh->Load(MESH2); break;
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160 | case 3: centralMesh->Load(MESH3); break;
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161 | case 4: centralMesh->Load(MESH4); break;
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162 | case 5: centralMesh->Load(MESH5); break;
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163 | case 6: centralMesh->Load(MESH6); break;
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164 | case 7: centralMesh->Load(MESH7); break;
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165 | case 8: centralMesh->Load(MESH8); break;
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166 | case 9: centralMesh->Load(MESH9); break;
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167 | }
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168 |
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169 | bCubeMapIsValid = false; // ask for cubemap redraw
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170 | }
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171 |
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172 | /// Handles keystroke messages.
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173 | void EnvMap::KeyboardProc( UINT nChar, bool bKeyDown, bool bAltDown )
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174 | {
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175 | if( bKeyDown )
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176 | {
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177 | bool b = pp.Get( bConfineToRoom );
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178 | float step = 0.1f;
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179 | //float max = roomSize-1.02f;
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180 |
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181 | if ( nChar >= '0' && nChar <= '9' ) {
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182 | int whichMesh = nChar-'0';
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183 | ChooseMesh(whichMesh); // load centralMesh
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184 |
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185 | }
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186 | else switch( nChar )
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187 | {
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188 | case VK_RIGHT: centralMesh->Move( D3DXVECTOR3( step,0,0), b ); break;
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189 | case VK_LEFT: centralMesh->Move( D3DXVECTOR3(-step,0,0), b ); break;
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190 | case VK_UP: centralMesh->Move( D3DXVECTOR3(0, step,0), b ); break;
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191 | case VK_DOWN: centralMesh->Move( D3DXVECTOR3(0,-step,0), b ); break;
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192 | case VK_PRIOR: centralMesh->Move( D3DXVECTOR3(0,0, step), b ); break;
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193 | case VK_NEXT: centralMesh->Move( D3DXVECTOR3(0,0,-step), b ); break;
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194 | case 32: bCubeMapIsValid = false; break;
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195 |
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196 | } // switch
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197 | }
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198 | }
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199 |
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200 | /// Performs prepocessing steps if necessary and then renders the scene.
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201 | void EnvMap::OnFrameRender( IDirect3DDevice9* pd3dDevice, D3DXMATRIXA16& mView, D3DXMATRIXA16& mProj )
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202 | {
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203 | /*if (pp.Get( bAutoGenCubeMap )) // calculate cube maps for each frame
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204 | bCubeMapIsValid = false;*/
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205 |
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206 | // regenerate cube maps if necessary
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207 | // regenerate if:
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208 | // - centralMesh changes
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209 | // - resolution changes
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210 | if ( !bCubeMapIsValid )
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211 | {
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212 | long clock1 = clock();
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213 |
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214 | // (to avoid warnings)
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215 | V( g_pEffect->SetTexture( "EnvironmentMap", NULL ) );
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216 |
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217 | D3DXVECTOR3 p = centralMesh->GetMeshPosition();
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218 | centralMesh->SetMeshPosition( D3DXVECTOR3(0,0,0) );
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219 |
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220 | // to be precise: offsetting to the center of the (DirectX) texel
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221 | V( g_pEffect->SetFloat( "texel_size", 1 / (float)CUBEMAP_SIZE ) );
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222 | // I had to call it 2 times to render the environment completely
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223 | RenderCubeMap( pCubeTexture );
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224 | RenderCubeMap( pCubeTexture ); // don't ask why
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225 |
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226 | centralMesh->SetMeshPosition( p );
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227 | V( g_pEffect->SetFloat( "texel_size", 0 ) );
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228 |
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229 | ReduceCubeMapSize( pCubeTexture, pCubeTextureSmall);
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230 | bShininessIsValid = false;
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231 | bCubeMapIsValid = true;
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232 | }
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233 |
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234 | if ( !bShininessIsValid )
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235 | // refresh cos texture
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236 | {
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237 | if ( pp.GetInt( iWhichMethod ) == DIFFUSE_SPECULAR_CLASSIC )
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238 | {
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239 | // prepare preconvolved cubemap
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240 | PreConvolve(pCubeTextureSmall, pCubeTexturePreConvolved);
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241 | }
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242 | else
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243 | {
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244 | // load precomputed reflectivity integral values
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245 | // or generate them if not found
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246 | GenerateCosTextureIfNotFound( L"cos\\cos_s", &evaluate );
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247 | }
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248 |
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249 | bShininessIsValid = true;
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250 | }
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251 |
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252 | // Render the scene
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253 | DoRendering(mView, mProj);
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254 | }
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255 |
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256 | /// Render the scene.
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257 | void EnvMap::DoRendering(D3DXMATRIXA16& mView, D3DXMATRIXA16& mProj)
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258 | {
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259 | UINT uPasses;
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260 |
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261 | D3DCOLOR backgroundColor = D3DCOLOR_ARGB(0, 66, 75, 121);
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262 | V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, backgroundColor, 1.0f, 0) );
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263 |
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264 | D3DXVECTOR3 eye = *camera->GetEyePt();
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265 | D3DXVECTOR4 eyePos(eye.x, eye.y, eye.z, 1);
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266 | D3DXVECTOR4 refPos(reference_pos.x, reference_pos.y, reference_pos.z, 1);
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267 |
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268 | V( g_pEffect->SetTexture( "EnvironmentMap", pCubeTexture ) );
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269 | V( g_pEffect->SetTexture( "SmallEnvironmentMap", pCubeTextureSmall ) );
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270 | V( g_pEffect->SetTexture( "Decoration", pCosValuesTexture ) );
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271 |
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272 | V( g_pEffect->SetVector ( "eyePos", &eyePos ) );
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273 | V( g_pEffect->SetVector ( "reference_pos", &refPos ) );
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274 | V( g_pEffect->SetFloat ( "intensity", pp.Get( fIntensity ) ));
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275 | V( g_pEffect->SetFloat ( "shininess", (float)pp.GetInt( iShininess )));
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276 | V( g_pEffect->SetInt ( "LR_CUBEMAP_SIZE", LR_CUBEMAP_SIZE ));
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277 |
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278 | // ------------------------- choose technique -------------------------
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279 |
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280 | switch (pp.GetInt( iWhichMethod )) {
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281 | case DIFFUSE_SPECULAR_CLASSIC:
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282 | V( g_pEffect->SetTechnique( "EnvMapDiffuseClassic" ) );
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283 | V( g_pEffect->SetTexture( "PreconvolvedEnvironmentMap", pCubeTexturePreConvolved ) );
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284 | break;
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285 | case DIFFUSE_SPECULAR_LOCALIZED:
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286 | //V( g_pEffect->SetTechnique( "EnvMapDiffuseLocalized" ) );
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287 | char techniqueName[100];
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288 | sprintf(techniqueName, "EnvMapDiffuseLocalized%i", LR_CUBEMAP_SIZE );
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289 | V( g_pEffect->SetTechnique( techniqueName ) );
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290 | break;
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291 | case DIFFUSE_SPECULAR_LOCALIZED_NEW:
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292 | sprintf(techniqueName, "EnvMapDiffuseLocalizedNew%i", LR_CUBEMAP_SIZE );
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293 | V( g_pEffect->SetTechnique( "EnvMapDiffuseLocalizedNew" ) );
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294 | break;
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295 | case DIFFUSE_SPECULAR_LOCALIZED_5TEX:
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296 | V( g_pEffect->SetTechnique( "EnvMapDiffuseLocalized5Tex" ) );
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297 | break;
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298 | }
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299 |
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300 | // ------------------------ end choose technique ------------------------
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301 |
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302 |
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303 | V( g_pEffect->Begin( &uPasses, 0 ) );
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304 | V( g_pEffect->BeginPass( 0 ) ); // csak 1 db PASS wan
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305 |
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306 | DrawCenterObjects( mView, mProj );
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307 |
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308 | if (pp.Get( bMultipleObjects ))
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309 | // draw two more object instances
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310 | {
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311 | double offset=1.3;
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312 |
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313 | D3DXVECTOR3 pos = centralMesh->GetMeshPosition();
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314 | centralMesh->SetMeshPosition( pos + D3DXVECTOR3(0,offset,0));
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315 | DrawCenterObjects( mView, mProj );
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316 |
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317 | centralMesh->SetMeshPosition( pos + D3DXVECTOR3(0,-offset,0));
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318 | DrawCenterObjects( mView, mProj );
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319 |
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320 | centralMesh->SetMeshPosition( pos );
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321 | }
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322 |
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323 | V( g_pEffect->EndPass() );
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324 | V( g_pEffect->End() );
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325 |
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326 | if (pp.GetInt( iShowCubeMap ) == 3 && pp.GetInt( iWhichMethod ) != DIFFUSE_SPECULAR_CLASSIC )
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327 | pp.SetInt( iShowCubeMap, 0 );
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328 |
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329 | switch (pp.GetInt( iShowCubeMap ))
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330 | {
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331 | case 0: break;
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332 | case 1: V( g_pEffect->SetTexture( "EnvironmentMap", pCubeTexture ) ); break;
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333 | case 2: V( g_pEffect->SetTexture( "EnvironmentMap", pCubeTextureSmall ) ); break;
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334 | case 3: V( g_pEffect->SetTexture( "EnvironmentMap", pCubeTexturePreConvolved) ); break;
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335 | }
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336 |
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337 | // draw environment objects (room)
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338 | V( g_pEffect->SetTechnique( "IlluminatedScene" ) );
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339 | V( g_pEffect->Begin( &uPasses, 0 ) );
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340 | V( g_pEffect->BeginPass( 0 ) );
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341 |
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342 | DrawEnvObjects( mView, mProj );
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343 |
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344 | V( g_pEffect->EndPass() );
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345 | V( g_pEffect->End() );
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346 |
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347 | V( g_pEffect->SetInt ( "iShowCubeMap", 0 ));
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348 | }
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349 |
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350 | /// Draw the central diffuse/glossy object.
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351 | void EnvMap::DrawCenterObjects( D3DXMATRIXA16& mView, D3DXMATRIXA16& mProj )
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352 | {
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353 | D3DXVECTOR4 objColor(1,1,0,1);
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354 |
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355 | objColor = D3DXVECTOR4(1,1,1,1);
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356 | V( g_pEffect->SetVector( "objColor", &objColor ) );
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357 |
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358 | float scale = centralMesh->GetMeshScale();
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359 | D3DXVECTOR3 offset = centralMesh->GetMeshPosition();
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360 |
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361 | D3DXMATRIXA16 w, rot;
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362 | D3DXMatrixRotationY( &rot, - 3.14159f / 2);
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363 |
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364 | if ( pp.GetInt( iWhichMesh ) == 8) // rotate the bunny for better look
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365 | {
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366 | D3DXMatrixRotationY( &rot, - 3.14159f);
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367 | w = rot * ScaleAndOffset( scale, offset );
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368 | }
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369 | else if ( pp.GetInt( iWhichMesh ) == 9) // rotate the skull for better look
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370 | {
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371 | D3DXMatrixRotationY( &rot, - 3.14159f / 2);
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372 | w = rot * ScaleAndOffset( scale, offset );
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373 | }
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374 | else
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375 | w = ScaleAndOffset( scale, offset );
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376 |
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377 | SetWorldViewProj( w, mView, mProj );
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378 |
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379 | centralMesh->Draw();
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380 | }
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381 |
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382 | /// Draw environment objects.
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383 | void EnvMap::DrawEnvObjects( D3DXMATRIXA16& mView, D3DXMATRIXA16& mProj )
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384 | {
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385 | D3DXVECTOR4 objColor(3,3,3,1);
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386 | if (bPreproc)
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387 | objColor *= 5;
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388 | g_pEffect->SetVector( "objColor", &objColor );
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389 | V( g_pEffect->SetFloat( "brightness", 0.0f ));
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390 | g_pEffect->CommitChanges();
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391 |
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392 | // meshes of the environment
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393 | if (pp.Get( bShowFireballs ))
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394 | {
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395 | for (int i=1; i<meshCount; i++)
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396 | {
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397 | V( g_pEffect->SetTexture( "Decoration", meshes[i]->GetTexture() ) );
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398 |
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399 | float scale = meshes[i]->GetMeshScale();
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400 | D3DXVECTOR3 offset = meshes[i]->GetMeshPosition();
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401 | SetWorldViewProj( ScaleAndOffset( scale, offset ), mView, mProj );
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402 |
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403 | meshes[i]->Draw();
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404 | }
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405 | }
|
---|
406 |
|
---|
407 | V( g_pEffect->SetTexture( "Decoration", pRoomTexture ) );
|
---|
408 |
|
---|
409 | // ----------------------------------------
|
---|
410 | // draw a room of size [-roomSize..roomSize]
|
---|
411 | // ----------------------------------------
|
---|
412 |
|
---|
413 | cube->PrepareDrawing();
|
---|
414 | D3DXVECTOR3 scale = D3DXVECTOR3(roomSize,roomSize,roomSize);
|
---|
415 | SetWorldViewProj( ScaleAndOffset( scale, D3DXVECTOR3(0,0,0) ), mView, mProj );
|
---|
416 |
|
---|
417 | // flip normals so that the room is visible from its inside
|
---|
418 | V( pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW) );
|
---|
419 | V( g_pEffect->SetTexture( "Decoration", pRoomTexture ) );
|
---|
420 | V( g_pEffect->SetFloat( "brightness", 2.8f ));
|
---|
421 | V( g_pEffect->SetInt ( "iShowCubeMap", 0 ));
|
---|
422 |
|
---|
423 | // decide if the room should visualize one of the cube maps
|
---|
424 | if ( bCubeMapIsValid && pp.GetInt( iShowCubeMap ) > 0)
|
---|
425 | V( g_pEffect->SetInt ( "iShowCubeMap", pp.GetInt( iShowCubeMap ) ));
|
---|
426 |
|
---|
427 | D3DXVECTOR4 facecolors[]={D3DXVECTOR4(1,0,0,1),
|
---|
428 | D3DXVECTOR4(1,0,1,1),
|
---|
429 | D3DXVECTOR4(1,1,0,1),
|
---|
430 | D3DXVECTOR4(0,0,1,1),
|
---|
431 | D3DXVECTOR4(0,1,0,1),
|
---|
432 | D3DXVECTOR4(0,1,1,1)};
|
---|
433 | for( int i=0; i<6; i++ )
|
---|
434 | {
|
---|
435 | /* objColor = D3DXVECTOR4(0.4f-i*0.1f, i*0.1f, (i%2)*0.4f, 1); // a colorful room
|
---|
436 | if (i==3) objColor += D3DXVECTOR4(0.05, 0.05, 0, 1);*/
|
---|
437 |
|
---|
438 | objColor = facecolors[i];
|
---|
439 |
|
---|
440 | g_pEffect->SetVector( "objColor", &objColor );
|
---|
441 | g_pEffect->CommitChanges();
|
---|
442 |
|
---|
443 | cube->DrawFace(i);
|
---|
444 | }
|
---|
445 |
|
---|
446 | pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);
|
---|
447 | V( g_pEffect->SetInt ( "iShowCubeMap", 0 ));
|
---|
448 | //V( g_pEffect->SetInt( "shininess", 2));
|
---|
449 | V( g_pEffect->SetFloat( "brightness", 1.0f ));
|
---|
450 |
|
---|
451 | //V( g_pEffect->SetTexture( "Decoration", pBoxTexture ) );
|
---|
452 |
|
---|
453 | /*// térelválasztó fal rajzolása
|
---|
454 | SetWorldViewProj( ScaleAndOffset( D3DXVECTOR3(0.01,roomSizeCurr*2/3,roomSizeCurr*0.3),
|
---|
455 | D3DXVECTOR3(1,-roomSizeCurr/3,0) ), mView, mProj );
|
---|
456 |
|
---|
457 | objColor = D3DXVECTOR4(1.3,0,0.8, 1);
|
---|
458 | g_pEffect->SetVector( "objColor", &objColor );
|
---|
459 |
|
---|
460 | for( int i=0; i<6; i++ )
|
---|
461 | {
|
---|
462 | cube->DrawFace(i);
|
---|
463 | }*/
|
---|
464 |
|
---|
465 | g_pEffect->CommitChanges();
|
---|
466 | }
|
---|
467 |
|
---|
468 | /**
|
---|
469 | Sets the given scaling and offset.
|
---|
470 | @return The resulting world transformation matrix.
|
---|
471 | */
|
---|
472 | D3DXMATRIXA16 EnvMap::ScaleAndOffset(D3DXVECTOR3 vScale, D3DXVECTOR3 vOffset)
|
---|
473 | {
|
---|
474 | D3DXMATRIXA16 mScale, mOffset;
|
---|
475 | D3DXMatrixIdentity(&mScale);
|
---|
476 | D3DXMatrixIdentity(&mOffset);
|
---|
477 |
|
---|
478 | D3DXMatrixTranslation( &mOffset, vOffset.x, vOffset.y, vOffset.z );
|
---|
479 | D3DXMatrixScaling( &mScale, vScale.x, vScale.y, vScale.z );
|
---|
480 |
|
---|
481 | return mScale * mOffset;
|
---|
482 | }
|
---|
483 |
|
---|
484 | /**
|
---|
485 | Sets the given uniform scaling and an offset.
|
---|
486 | @return The resulting world transformation matrix.
|
---|
487 | */
|
---|
488 | D3DXMATRIXA16 EnvMap::ScaleAndOffset(float fScale, D3DXVECTOR3 vOffset)
|
---|
489 | {
|
---|
490 | return ScaleAndOffset( D3DXVECTOR3(fScale,fScale,fScale), vOffset );
|
---|
491 | }
|
---|
492 |
|
---|
493 | /**
|
---|
494 | \brief Uploads the specified world/view/projection transformation matrices to the GPU.
|
---|
495 | */
|
---|
496 | void EnvMap::SetWorldViewProj(D3DXMATRIXA16& mWorld, D3DXMATRIXA16& mView, D3DXMATRIXA16& mProj )
|
---|
497 | {
|
---|
498 | D3DXMATRIXA16 mWorldView = mWorld * mView;
|
---|
499 | D3DXMATRIXA16 mWorldViewProjection = mWorldView * mProj;
|
---|
500 |
|
---|
501 | D3DXMATRIXA16 mWorldViewI, mWorldViewIT, mWorldI, mWorldIT;
|
---|
502 | D3DXMatrixInverse(&mWorldViewI, NULL, &mWorldView);
|
---|
503 | D3DXMatrixTranspose(&mWorldViewIT, &mWorldViewI);
|
---|
504 |
|
---|
505 | D3DXMatrixInverse(&mWorldI, NULL, &mWorld);
|
---|
506 | D3DXMatrixTranspose(&mWorldIT, &mWorldI);
|
---|
507 |
|
---|
508 | V( g_pEffect->SetMatrix( "World", &mWorld ) );
|
---|
509 | V( g_pEffect->SetMatrix( "WorldIT", &mWorldIT ) );
|
---|
510 | V( g_pEffect->SetMatrix( "WorldView", &mWorldView ) );
|
---|
511 | //V( g_pEffect->SetMatrix( "WorldViewIT", &mWorldViewIT ) );
|
---|
512 |
|
---|
513 | V( g_pEffect->SetMatrix( "WorldViewProjection", &mWorldViewProjection ) );
|
---|
514 | V( g_pEffect->CommitChanges() );
|
---|
515 | }
|
---|
516 |
|
---|
517 | /// \brief Renders the environment into the specified cubemap.
|
---|
518 | ///
|
---|
519 | /// The camera is placed into #reference_pos. Uses technique IlluminatedScenePS() for rendering.
|
---|
520 | void EnvMap::RenderCubeMap(IDirect3DCubeTexture9* pCubeTexture)
|
---|
521 | {
|
---|
522 | IDirect3DSurface9* oldRenderTarget;
|
---|
523 | IDirect3DSurface9* oldDepthStencil;
|
---|
524 | IDirect3DSurface9* newDepthStencil;
|
---|
525 |
|
---|
526 | // create a CUBEMAP_SIZE x CUBEMAP_SIZE size depth buffer
|
---|
527 | pd3dDevice->CreateDepthStencilSurface(CUBEMAP_SIZE, CUBEMAP_SIZE, D3DFMT_D16,
|
---|
528 | D3DMULTISAMPLE_NONE, 0, true, &newDepthStencil, NULL);
|
---|
529 |
|
---|
530 | // replace old depth buffer
|
---|
531 | pd3dDevice->GetDepthStencilSurface(&oldDepthStencil);
|
---|
532 | pd3dDevice->SetDepthStencilSurface(newDepthStencil);
|
---|
533 |
|
---|
534 | pd3dDevice->GetRenderTarget(0,&oldRenderTarget);
|
---|
535 |
|
---|
536 | UINT uPasses;
|
---|
537 | for (int i = 0; i < 6; i++)
|
---|
538 | {
|
---|
539 | IDirect3DSurface9* pFace;
|
---|
540 | V( pCubeTexture->GetCubeMapSurface((D3DCUBEMAP_FACES)i, 0, &pFace) );
|
---|
541 | V( pd3dDevice->SetRenderTarget(0, pFace) );
|
---|
542 |
|
---|
543 | V( g_pEffect->SetTechnique( "IlluminatedScene" ) );
|
---|
544 | V( g_pEffect->SetTexture( "Decoration", pRoomTexture ) );
|
---|
545 |
|
---|
546 | V( g_pEffect->Begin( &uPasses, 0 ) );
|
---|
547 | V( g_pEffect->BeginPass( 0 ) );
|
---|
548 |
|
---|
549 | V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
|
---|
550 | D3DCOLOR_ARGB(0,/*i==0 ? 255 : */0,0,0), 1.0f, 0) );
|
---|
551 |
|
---|
552 | // mView
|
---|
553 | D3DXMATRIXA16 mView, mProj;
|
---|
554 |
|
---|
555 | // looking toward the cube map faces _from the origin_
|
---|
556 | // mView = DXUTGetCubeMapViewMatrix( i );
|
---|
557 |
|
---|
558 | //float scale = centralMesh->GetMeshScale();
|
---|
559 | //D3DXVECTOR3 offset = centralMesh->GetMeshPosition();
|
---|
560 |
|
---|
561 | D3DXVECTOR3 vecEye(0,0,0);
|
---|
562 | D3DXVECTOR3 vecAt(0.0f, 0.0f, 0.0f);
|
---|
563 | D3DXVECTOR3 vecUp(0.0f, 0.0f, 0.0f);
|
---|
564 |
|
---|
565 | switch( i )
|
---|
566 | {
|
---|
567 | case D3DCUBEMAP_FACE_POSITIVE_X:
|
---|
568 | vecAt = D3DXVECTOR3( 1, 0, 0 );
|
---|
569 | vecUp = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
|
---|
570 | break;
|
---|
571 | case D3DCUBEMAP_FACE_NEGATIVE_X:
|
---|
572 | vecAt = D3DXVECTOR3(-1.0f, 0.0f, 0.0f );
|
---|
573 | vecUp = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
|
---|
574 | break;
|
---|
575 | case D3DCUBEMAP_FACE_POSITIVE_Y:
|
---|
576 | vecAt = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
|
---|
577 | vecUp = D3DXVECTOR3( 0.0f, 0.0f,-1.0f );
|
---|
578 | break;
|
---|
579 | case D3DCUBEMAP_FACE_NEGATIVE_Y:
|
---|
580 | vecAt = D3DXVECTOR3( 0.0f,-1.0f, 0.0f );
|
---|
581 | vecUp = D3DXVECTOR3( 0.0f, 0.0f, 1.0f );
|
---|
582 | break;
|
---|
583 | case D3DCUBEMAP_FACE_POSITIVE_Z:
|
---|
584 | vecAt = D3DXVECTOR3( 0.0f, 0.0f, 1.0f );
|
---|
585 | vecUp = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
|
---|
586 | break;
|
---|
587 | case D3DCUBEMAP_FACE_NEGATIVE_Z:
|
---|
588 | vecAt = D3DXVECTOR3( 0.0f, 0.0f,-1.0f );
|
---|
589 | vecUp = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
|
---|
590 | break;
|
---|
591 | }
|
---|
592 |
|
---|
593 | // reference point is the current object position
|
---|
594 | reference_pos = centralMesh->GetMeshPosition();
|
---|
595 | vecEye += reference_pos;
|
---|
596 | vecAt += reference_pos;
|
---|
597 |
|
---|
598 | D3DXMatrixLookAtLH(&mView, &vecEye, &vecAt, &vecUp);
|
---|
599 | D3DXMatrixPerspectiveFovLH( &mProj, D3DX_PI/2, 1, 0.1, 100 );
|
---|
600 |
|
---|
601 | bPreproc = true;
|
---|
602 | DrawEnvObjects(mView, mProj); // boost lightness of the environment
|
---|
603 | bPreproc = false;
|
---|
604 |
|
---|
605 | V( g_pEffect->EndPass() );
|
---|
606 | V( g_pEffect->End() );
|
---|
607 |
|
---|
608 | SAFE_RELEASE( pFace );
|
---|
609 | }
|
---|
610 |
|
---|
611 | // restore old rendertarget & depth buffer
|
---|
612 | pd3dDevice->SetRenderTarget(0, oldRenderTarget);
|
---|
613 | pd3dDevice->SetDepthStencilSurface(oldDepthStencil);
|
---|
614 | SAFE_RELEASE( oldDepthStencil );
|
---|
615 | SAFE_RELEASE( oldRenderTarget );
|
---|
616 | SAFE_RELEASE( newDepthStencil );
|
---|
617 | }
|
---|
618 |
|
---|
619 | /// Downsample a cube map to resolution LR_CUBEMAP_SIZE
|
---|
620 | void EnvMap::ReduceCubeMapSize(IDirect3DCubeTexture9* pSourceCube, IDirect3DCubeTexture9* pDestCube)
|
---|
621 | {
|
---|
622 | // get the descriptor of the source cubemap
|
---|
623 | IDirect3DSurface9* pSourceFace;
|
---|
624 | pSourceCube->GetCubeMapSurface((D3DCUBEMAP_FACES)0, 0, &pSourceFace);
|
---|
625 | D3DSURFACE_DESC sourceDesc;
|
---|
626 | pSourceFace->GetDesc( &sourceDesc );
|
---|
627 | SAFE_RELEASE( pSourceFace );
|
---|
628 |
|
---|
629 | // pTexture : copy of the source cubemap's face
|
---|
630 | IDirect3DTexture9* pTexture = NULL;
|
---|
631 | V( D3DXCreateTexture( pd3dDevice, sourceDesc.Width, sourceDesc.Height, 1,
|
---|
632 | D3DUSAGE_RENDERTARGET, D3DFMT_A16B16G16R16F, D3DPOOL_DEFAULT, &pTexture ) );
|
---|
633 |
|
---|
634 | IDirect3DSurface9* m_backBuffer=NULL;
|
---|
635 | pd3dDevice->GetRenderTarget(0, &m_backBuffer);
|
---|
636 |
|
---|
637 | for(int i=0; i<6; i++)
|
---|
638 | {
|
---|
639 | IDirect3DSurface9* pFace;
|
---|
640 | IDirect3DSurface9* pSurface;
|
---|
641 |
|
---|
642 | // a forrás cubemap akt. lapjának átmásolása pTexture-be
|
---|
643 | V( pSourceCube->GetCubeMapSurface((D3DCUBEMAP_FACES)i, 0, &pFace) );
|
---|
644 | V( pTexture->GetSurfaceLevel( 0, &pSurface ) );
|
---|
645 | V( pd3dDevice->StretchRect(pFace, NULL, pSurface, NULL, D3DTEXF_NONE) );
|
---|
646 |
|
---|
647 | // pTexture átadása a shadernek
|
---|
648 | V( g_pEffect->SetTexture( "Decoration", pTexture ) );
|
---|
649 |
|
---|
650 | // rendertarget: a cél lap
|
---|
651 | IDirect3DSurface9* pDestCubeFace;
|
---|
652 | V( pDestCube->GetCubeMapSurface((D3DCUBEMAP_FACES)i, 0, &pDestCubeFace) );
|
---|
653 | V( pd3dDevice->SetRenderTarget(0, pDestCubeFace) );
|
---|
654 |
|
---|
655 | // begin drawing
|
---|
656 | //V( g_pEffect->SetTechnique( "ReduceTexture" ) );
|
---|
657 |
|
---|
658 | char techniqueName[100];
|
---|
659 | sprintf(techniqueName, "ReduceTexture%i", LR_CUBEMAP_SIZE );
|
---|
660 | V( g_pEffect->SetTechnique( techniqueName ) );
|
---|
661 |
|
---|
662 |
|
---|
663 | UINT uPasses;
|
---|
664 | V( g_pEffect->Begin( &uPasses, 0 ) );
|
---|
665 | V( g_pEffect->BeginPass( 0 ) );
|
---|
666 |
|
---|
667 | V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
|
---|
668 | D3DCOLOR_ARGB(0,255,255,0), 1.0f, 0) );
|
---|
669 |
|
---|
670 | // draw a square
|
---|
671 | DrawFullScreenQuad();
|
---|
672 |
|
---|
673 | V( g_pEffect->EndPass() );
|
---|
674 | V( g_pEffect->End() );
|
---|
675 |
|
---|
676 | SAFE_RELEASE( pSurface );
|
---|
677 | SAFE_RELEASE( pFace );
|
---|
678 | SAFE_RELEASE( pDestCubeFace );
|
---|
679 | }
|
---|
680 |
|
---|
681 | pd3dDevice->SetRenderTarget(0,m_backBuffer);
|
---|
682 |
|
---|
683 | SAFE_RELEASE( pTexture );
|
---|
684 | SAFE_RELEASE( m_backBuffer );
|
---|
685 | }
|
---|
686 |
|
---|
687 | /// \brief Calculates the irradiance map by convolution.
|
---|
688 | ///
|
---|
689 | /// Convolves data from the source cubemap and stores the result in the target cubemap. Uses ConvolutionPS().
|
---|
690 | void EnvMap::PreConvolve(IDirect3DCubeTexture9* pSourceCube, IDirect3DCubeTexture9* pDestCube)
|
---|
691 | {
|
---|
692 | IDirect3DSurface9* oldRenderTarget;
|
---|
693 | IDirect3DSurface9* oldDepthStencil;
|
---|
694 | IDirect3DSurface9* newDepthStencil;
|
---|
695 |
|
---|
696 | // create a LR_CUBEMAP_SIZE x LR_CUBEMAP_SIZE size depth buffer
|
---|
697 | pd3dDevice->CreateDepthStencilSurface(LR_CUBEMAP_SIZE, LR_CUBEMAP_SIZE, D3DFMT_D16,
|
---|
698 | D3DMULTISAMPLE_NONE, 0, true, &newDepthStencil, NULL);
|
---|
699 |
|
---|
700 | // replace old depth buffer
|
---|
701 | pd3dDevice->GetDepthStencilSurface(&oldDepthStencil);
|
---|
702 | pd3dDevice->SetDepthStencilSurface(newDepthStencil);
|
---|
703 | pd3dDevice->GetRenderTarget(0, &oldRenderTarget);
|
---|
704 |
|
---|
705 | V( g_pEffect->SetTexture( "SmallEnvironmentMap", pSourceCube ) );
|
---|
706 |
|
---|
707 | float s = (float)pp.GetInt( iShininess );
|
---|
708 | V( g_pEffect->SetFloat ( "shininess", s));
|
---|
709 |
|
---|
710 | for(int i=0; i<6; i++)
|
---|
711 | {
|
---|
712 | V( g_pEffect->SetInt( "nFace", i ) );
|
---|
713 |
|
---|
714 | // set a face of 'pDestCube' as rendertarget
|
---|
715 | IDirect3DSurface9* pDestCubeFace;
|
---|
716 | V( pDestCube->GetCubeMapSurface((D3DCUBEMAP_FACES)i, 0, &pDestCubeFace) );
|
---|
717 | V( pd3dDevice->SetRenderTarget(0, pDestCubeFace) );
|
---|
718 |
|
---|
719 | // begin drawing
|
---|
720 | //V( g_pEffect->SetTechnique( "Convolution" ) );
|
---|
721 | char techniqueName[100];
|
---|
722 | sprintf(techniqueName, "Convolution%i", LR_CUBEMAP_SIZE );
|
---|
723 | V( g_pEffect->SetTechnique( techniqueName ) );
|
---|
724 |
|
---|
725 |
|
---|
726 | UINT uPasses;
|
---|
727 | V( g_pEffect->Begin( &uPasses, 0 ) );
|
---|
728 | V( g_pEffect->BeginPass( 0 ) );
|
---|
729 |
|
---|
730 | V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
|
---|
731 | D3DCOLOR_ARGB(0,255,255,255), 1.0f, 0) );
|
---|
732 |
|
---|
733 | // draw a square
|
---|
734 | DrawFullScreenQuad();
|
---|
735 |
|
---|
736 | V( g_pEffect->EndPass() );
|
---|
737 | V( g_pEffect->End() );
|
---|
738 | SAFE_RELEASE( pDestCubeFace );
|
---|
739 | }
|
---|
740 |
|
---|
741 | //SaveCubeMap( pDestCube, "ha", "");
|
---|
742 |
|
---|
743 | // restore old rendertarget & depth buffer
|
---|
744 | pd3dDevice->SetRenderTarget(0, oldRenderTarget);
|
---|
745 | pd3dDevice->SetDepthStencilSurface(oldDepthStencil);
|
---|
746 | SAFE_RELEASE( oldDepthStencil );
|
---|
747 | SAFE_RELEASE( oldRenderTarget );
|
---|
748 | SAFE_RELEASE( newDepthStencil );
|
---|
749 | }
|
---|
750 |
|
---|
751 | void EnvMap::SaveCubeMap(IDirect3DCubeTexture9* pCubeTexture, char* FileNamePrefix, char* FileNameSuffix)
|
---|
752 | {
|
---|
753 | char buf[100];
|
---|
754 | wchar_t wbuf[100];
|
---|
755 |
|
---|
756 | for(int i=0;i<6;i++)
|
---|
757 | {
|
---|
758 | sprintf(buf, "%s%i%s.png", FileNamePrefix, i, FileNameSuffix);
|
---|
759 | mbstowcs( wbuf, buf, 100 );
|
---|
760 |
|
---|
761 | IDirect3DSurface9* pFace;
|
---|
762 | V( pCubeTexture->GetCubeMapSurface((D3DCUBEMAP_FACES)i, 0, &pFace) );
|
---|
763 | D3DXSaveSurfaceToFile(wbuf, D3DXIFF_PNG, pFace, NULL,NULL);
|
---|
764 | }
|
---|
765 | }
|
---|
766 |
|
---|
767 | /// \brief Calls GenerateCosTexture() if the specified texture is not yet calculated
|
---|
768 | /// and stored as a texture in the <b>cos</b> subdirectory.
|
---|
769 |
|
---|
770 | void EnvMap::GenerateCosTextureIfNotFound( wchar_t* fileName, eval_fn evaluator )
|
---|
771 | // precomputing geometric factors
|
---|
772 | {
|
---|
773 | wchar_t wCosTextureName[100];
|
---|
774 | swprintf( wCosTextureName, L"%s%02i.png", fileName, pp.GetInt( iShininess ) );
|
---|
775 |
|
---|
776 | // try to open
|
---|
777 | hr = D3DXCreateTextureFromFile( pd3dDevice, wCosTextureName, &pCosValuesTexture);
|
---|
778 | if ( FAILED( hr ) )
|
---|
779 | {
|
---|
780 | wchar_t buf[ 400 ];
|
---|
781 | swprintf( buf, L"Preprocessed texture not found!\n"
|
---|
782 | L"The program will generate the following texture:\n"
|
---|
783 | L"Texture name: %s\n"
|
---|
784 | L"Shininess: %i\n"
|
---|
785 | L"Iterations: %i (%i%% of the original texture quality).",
|
---|
786 | wCosTextureName, pp.GetInt( iShininess ), M*M, 100 * M*M/25/25 );
|
---|
787 | MessageBox( NULL, buf, L"Texture not found!", MB_ICONINFORMATION ); // show message
|
---|
788 |
|
---|
789 | // generate
|
---|
790 | pCosValuesTexture = GenerateCosTexture( evaluator );
|
---|
791 |
|
---|
792 | // save
|
---|
793 | IDirect3DSurface9* pSurface = NULL;
|
---|
794 | V( pCosValuesTexture->GetSurfaceLevel( 0, &pSurface ) );
|
---|
795 | hr = D3DXSaveSurfaceToFile( wCosTextureName, D3DXIFF_PNG, pSurface, NULL,NULL);
|
---|
796 | if ( FAILED( hr ) )
|
---|
797 | {
|
---|
798 | swprintf( buf, L"Failed to save texture %s!", wCosTextureName );
|
---|
799 | MessageBox( NULL, buf, L"Texture saving failed!", MB_ICONERROR );
|
---|
800 | }
|
---|
801 | SAFE_RELEASE( pSurface );
|
---|
802 | }
|
---|
803 | }
|
---|
804 |
|
---|
805 | /// Generates precomputed texture to store values for the reflectivity integral. Uses the eval() function.
|
---|
806 | IDirect3DTexture9* EnvMap::GenerateCosTexture( eval_fn evaluator )
|
---|
807 | {
|
---|
808 | const int X = 128;
|
---|
809 | const int Y = 128;
|
---|
810 |
|
---|
811 | IDirect3DDevice9* pd3dDevice = DXUTGetD3DDevice();
|
---|
812 |
|
---|
813 | // Create a temporary texture
|
---|
814 | LPDIRECT3DTEXTURE9 texTemp;
|
---|
815 | V( pd3dDevice->CreateTexture( X, Y, 1,
|
---|
816 | D3DUSAGE_DYNAMIC, D3DFMT_A32B32G32R32F,
|
---|
817 | D3DPOOL_DEFAULT, &texTemp, NULL ) );
|
---|
818 |
|
---|
819 | D3DLOCKED_RECT Rect;
|
---|
820 | V( texTemp->LockRect(0, &Rect, 0, 0) );
|
---|
821 |
|
---|
822 | int u, v;
|
---|
823 | float dx, dy, I;
|
---|
824 | float* pBits;
|
---|
825 |
|
---|
826 | FILE* f = fopen( ".progress_bar", "wt");
|
---|
827 | fprintf(f, "");
|
---|
828 | fclose( f );
|
---|
829 |
|
---|
830 | long clock1 = clock();
|
---|
831 |
|
---|
832 | for( v=0; v < Y; ++v )
|
---|
833 | {
|
---|
834 | pBits = (float*)((char*)(Rect.pBits)+v*Rect.Pitch);
|
---|
835 |
|
---|
836 | for( u=0; u < X; ++u )
|
---|
837 | {
|
---|
838 | dx = u/(float)X; // 0..1
|
---|
839 | dy = v/(float)Y; // 0..1
|
---|
840 |
|
---|
841 | //*(pBits++) = eval( 2*dx-1, dy*2*3.14159f ) / 3; // old: intensity
|
---|
842 | //*(pBits++) = values[ v*X + u ] / 50; // intensity
|
---|
843 |
|
---|
844 | float result = evaluator( dx, dy );
|
---|
845 | *(pBits++) = result; // intensity
|
---|
846 | *(pBits++) = result; // intensity
|
---|
847 | *(pBits++) = result; // intensity
|
---|
848 | *(pBits++) = 0; // intensity
|
---|
849 | }
|
---|
850 |
|
---|
851 | if ( v > 0 && v % (Y/10) == 0)
|
---|
852 | {
|
---|
853 | FILE* f = fopen( ".progress_bar", "at"); // some silly progress bar:
|
---|
854 | fprintf(f, "#"); // write a # for each 10% done
|
---|
855 | fclose( f );
|
---|
856 | }
|
---|
857 | }
|
---|
858 |
|
---|
859 | /* long clock2 = clock();
|
---|
860 | float time = (float)(clock2-clock1)/CLOCKS_PER_SEC;
|
---|
861 |
|
---|
862 | f = fopen( ".progress_bar", "at");
|
---|
863 | fprintf(f, "\ntime:%.3g secs", time);
|
---|
864 | fclose( f );*/
|
---|
865 |
|
---|
866 | texTemp->UnlockRect(0);
|
---|
867 |
|
---|
868 | return texTemp;
|
---|
869 | }
|
---|
870 |
|
---|
871 | /// \brief Calculates the reflectivity integral for a given texel.
|
---|
872 | ///
|
---|
873 | /// The angle between the surface normal and texel center is described by cos_theta
|
---|
874 | /// and the solid angle occupied by the texel is denoted by dw.
|
---|
875 | ///
|
---|
876 | /// Instead of evaluating the reflectivity integral with only one sample belongig to the texel center
|
---|
877 | /// (that would give us a result of cos_theta x dw), we use 2 #M x 2 #M x #M regulary spaced samples, and
|
---|
878 | /// discard those that lie outside the unit hemisphere. The remaining samples are regulary distributed over the
|
---|
879 | /// hemisphere.
|
---|
880 | ///
|
---|
881 | /// For each sample, we check if it lies inside the cone of the specified solid angle.
|
---|
882 | /// If yes, its contribution is considered.
|
---|
883 |
|
---|
884 | float eval( float cos_theta, float dw )
|
---|
885 | {
|
---|
886 | const float PI = 3.14159f;
|
---|
887 |
|
---|
888 | float sum = 0;
|
---|
889 | int counter = 0;
|
---|
890 | int shininess = pp.GetInt( iShininess );
|
---|
891 |
|
---|
892 | float sin_theta = sqrt(1-cos_theta*cos_theta);
|
---|
893 |
|
---|
894 | D3DXVECTOR3 center( sin_theta, 0, cos_theta );
|
---|
895 | D3DXVECTOR3 up( 0, 0, 1 );
|
---|
896 |
|
---|
897 | float cos_min = 1 - dw / 2 / PI;
|
---|
898 |
|
---|
899 | for (int x = -M; x <= M; x++)
|
---|
900 | for (int y = -M; y <= M; y++)
|
---|
901 | for (int z = /*-M*/ 0; z <= M; z++) // z == up
|
---|
902 | {
|
---|
903 | D3DXVECTOR3 w(0,0,0);
|
---|
904 | w.x = x / (float)M; // -1..1
|
---|
905 | w.y = y / (float)M; // -1..1
|
---|
906 | w.z = z / (float)M; // 0..1
|
---|
907 |
|
---|
908 | float len = D3DXVec3Length( &w );
|
---|
909 | if ( len > 0 && len <= 1 ) // inside the hemisphere
|
---|
910 | {
|
---|
911 | w /= len; // normalize
|
---|
912 |
|
---|
913 | float cos_curr = D3DXVec3Dot( &w, ¢er );
|
---|
914 | if ( cos_curr >= cos_min ) // w is inside the 'cone' of the given solid angle
|
---|
915 | {
|
---|
916 | sum += pow( D3DXVec3Dot( &w, &up ), shininess );
|
---|
917 | //sum += D3DXVec3Dot( &w, &up );
|
---|
918 | }
|
---|
919 |
|
---|
920 | counter++; // number of samples
|
---|
921 | }
|
---|
922 | }
|
---|
923 |
|
---|
924 | return sum * (2*PI / counter) * ((shininess+2) / PI);
|
---|
925 | //return dx;
|
---|
926 | } |
---|