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8557 | maxcodehac | 1 | #include "version.h" |
2 | |||
3 | #ifdef USE_CLOUDSKY |
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4 | |||
5 | #include "wl_def.h" |
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6 | #include "wl_cloudsky.h" |
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7 | |||
8 | // Each colormap defines a number of colors which should be mapped from |
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9 | // the skytable. The according colormapentry_t array defines how these colors should |
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10 | // be mapped to the wolfenstein palette. The first int of each entry defines |
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11 | // how many colors are grouped to this entry and the absolute value of the |
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12 | // second int sets the starting palette index for this pair. If this value is |
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13 | // negative the index will be decremented for every color, if it's positive |
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14 | // it will be incremented. |
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15 | // |
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16 | // Example colormap: |
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17 | // colormapentry_t colmapents_1[] = { { 6, -10 }, { 2, 40 } }; |
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18 | // colormap_t colorMaps[] = { |
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19 | // { 8, colmapents_1 } |
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20 | // }; |
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21 | // |
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22 | // The colormap 0 consists of 8 colors. The first color group consists of 6 |
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23 | // colors and starts descending at palette index 10: 10, 9, 8, 7, 6, 5 |
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24 | // The second color group consists of 2 colors and starts ascending at |
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25 | // index 40: 40, 41 |
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26 | // There's no other color group because all colors of this colormap are |
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27 | // already used (6+2=8) |
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28 | // |
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29 | // Warning: Always make sure that the sum of the amount of the colors in all |
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30 | // color groups is the number of colors used for your colormap! |
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31 | |||
32 | colormapentry_t colmapents_1[] = { { 16, -31 }, { 16, 136 } }; |
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33 | colormapentry_t colmapents_2[] = { { 16, -31 } }; |
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34 | |||
35 | colormap_t colorMaps[] = { |
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36 | { 32, colmapents_1 }, |
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37 | { 16, colmapents_2 } |
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38 | }; |
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39 | |||
40 | const int numColorMaps = lengthof(colorMaps); |
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41 | |||
42 | // The sky definitions which can be selected as defined by GetCloudSkyDefID() in wl_def.h |
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43 | // You can use |
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44 | // Each entry consists of seed, speed, angle and colorMapIndex |
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45 | cloudsky_t cloudSkys[] = { |
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46 | { 626, 800, 20, 0 }, |
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47 | { 1234, 650, 60, 1 }, |
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48 | { 0, 700, 120, 0 }, |
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49 | { 0, 0, 0, 0 }, |
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50 | { 11243, 750, 310, 0 }, |
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51 | { 32141, 750, 87, 0 }, |
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52 | { 12124, 750, 64, 0 }, |
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53 | { 55543, 500, 240, 0 }, |
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54 | { 65535, 200, 54, 1 }, |
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55 | { 4, 1200, 290, 0 }, |
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56 | }; |
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57 | |||
58 | byte skyc[65536L]; |
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59 | |||
60 | long cloudx = 0, cloudy = 0; |
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61 | cloudsky_t *curSky = NULL; |
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62 | |||
63 | #ifdef USE_FEATUREFLAGS |
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64 | |||
65 | // The lower left tile of every map determines the used cloud sky definition from cloudSkys. |
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66 | static int GetCloudSkyDefID() |
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67 | { |
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68 | int skyID = ffDataBottomLeft; |
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69 | assert(skyID >= 0 && skyID < lengthof(cloudSkys)); |
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70 | return skyID; |
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71 | } |
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72 | |||
73 | #else |
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74 | |||
75 | static int GetCloudSkyDefID() |
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76 | { |
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77 | int skyID; |
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78 | switch(gamestate.episode * 10 + mapon) |
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79 | { |
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80 | case 0: skyID = 0; break; |
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81 | case 1: skyID = 1; break; |
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82 | case 2: skyID = 2; break; |
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83 | case 3: skyID = 3; break; |
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84 | case 4: skyID = 4; break; |
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85 | case 5: skyID = 5; break; |
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86 | case 6: skyID = 6; break; |
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87 | case 7: skyID = 7; break; |
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88 | case 8: skyID = 8; break; |
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89 | case 9: skyID = 9; break; |
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90 | default: skyID = 9; break; |
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91 | } |
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92 | assert(skyID >= 0 && skyID < lengthof(cloudSkys)); |
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93 | return skyID; |
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94 | } |
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95 | |||
96 | #endif |
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97 | |||
98 | void SplitS(unsigned size,unsigned x1,unsigned y1,unsigned x2,unsigned y2) |
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99 | { |
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100 | if(size==1) return; |
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101 | if(!skyc[((x1+size/2)*256+y1)]) |
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102 | { |
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103 | skyc[((x1+size/2)*256+y1)]=(byte)(((int)skyc[(x1*256+y1)] |
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104 | +(int)skyc[((x2&0xff)*256+y1)])/2)+rand()%(size*2)-size; |
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105 | if(!skyc[((x1+size/2)*256+y1)]) skyc[((x1+size/2)*256+y1)]=1; |
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106 | } |
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107 | if(!skyc[((x1+size/2)*256+(y2&0xff))]) |
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108 | { |
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109 | skyc[((x1+size/2)*256+(y2&0xff))]=(byte)(((int)skyc[(x1*256+(y2&0xff))] |
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110 | +(int)skyc[((x2&0xff)*256+(y2&0xff))])/2)+rand()%(size*2)-size; |
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111 | if(!skyc[((x1+size/2)*256+(y2&0xff))]) |
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112 | skyc[((x1+size/2)*256+(y2&0xff))]=1; |
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113 | } |
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114 | if(!skyc[(x1*256+y1+size/2)]) |
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115 | { |
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116 | skyc[(x1*256+y1+size/2)]=(byte)(((int)skyc[(x1*256+y1)] |
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117 | +(int)skyc[(x1*256+(y2&0xff))])/2)+rand()%(size*2)-size; |
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118 | if(!skyc[(x1*256+y1+size/2)]) skyc[(x1*256+y1+size/2)]=1; |
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119 | } |
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120 | if(!skyc[((x2&0xff)*256+y1+size/2)]) |
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121 | { |
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122 | skyc[((x2&0xff)*256+y1+size/2)]=(byte)(((int)skyc[((x2&0xff)*256+y1)] |
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123 | +(int)skyc[((x2&0xff)*256+(y2&0xff))])/2)+rand()%(size*2)-size; |
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124 | if(!skyc[((x2&0xff)*256+y1+size/2)]) skyc[((x2&0xff)*256+y1+size/2)]=1; |
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125 | } |
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126 | |||
127 | skyc[((x1+size/2)*256+y1+size/2)]=(byte)(((int)skyc[(x1*256+y1)] |
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128 | +(int)skyc[((x2&0xff)*256+y1)]+(int)skyc[(x1*256+(y2&0xff))] |
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129 | +(int)skyc[((x2&0xff)*256+(y2&0xff))])/4)+rand()%(size*2)-size; |
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130 | |||
131 | SplitS(size/2,x1,y1+size/2,x1+size/2,y2); |
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132 | SplitS(size/2,x1+size/2,y1,x2,y1+size/2); |
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133 | SplitS(size/2,x1+size/2,y1+size/2,x2,y2); |
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134 | SplitS(size/2,x1,y1,x1+size/2,y1+size/2); |
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135 | } |
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136 | |||
137 | void InitSky() |
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138 | { |
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139 | unsigned cloudskyid = GetCloudSkyDefID(); |
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140 | if(cloudskyid >= lengthof(cloudSkys)) |
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141 | Quit("Illegal cloud sky id: %u", cloudskyid); |
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142 | curSky = &cloudSkys[cloudskyid]; |
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143 | |||
144 | memset(skyc, 0, sizeof(skyc)); |
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145 | // funny water texture if used instead of memset ;D |
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146 | // for(int i = 0; i < 65536; i++) |
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147 | // skyc[i] = rand() % 32 * 8; |
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148 | |||
149 | srand(curSky->seed); |
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150 | skyc[0] = rand() % 256; |
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151 | SplitS(256, 0, 0, 256, 256); |
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152 | |||
153 | // Smooth the clouds a bit |
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154 | for(int k = 0; k < 2; k++) |
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155 | { |
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156 | for(int i = 0; i < 256; i++) |
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157 | { |
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158 | for(int j = 0; j < 256; j++) |
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159 | { |
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160 | int32_t val = -skyc[j * 256 + i]; |
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161 | for(int m = 0; m < 3; m++) |
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162 | { |
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163 | for(int n = 0; n < 3; n++) |
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164 | { |
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165 | val += skyc[((j + n - 1) & 0xff) * 256 + ((i + m - 1) & 0xff)]; |
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166 | } |
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167 | } |
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168 | skyc[j * 256 + i] = (byte)(val >> 3); |
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169 | } |
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170 | } |
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171 | } |
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172 | |||
173 | // the following commented line could be useful, if you're trying to |
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174 | // create a new color map. This will display your current color map |
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175 | // in one (of course repeating) stripe of the sky |
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176 | |||
177 | // for(int i = 0; i < 256; i++) |
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178 | // skyc[i] = skyc[i + 256] = skyc[i + 512] = i; |
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179 | |||
180 | if(curSky->colorMapIndex >= lengthof(colorMaps)) |
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181 | Quit("Illegal colorMapIndex for cloud sky def %u: %u", cloudskyid, curSky->colorMapIndex); |
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182 | |||
183 | colormap_t *curMap = &colorMaps[curSky->colorMapIndex]; |
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184 | int numColors = curMap->numColors; |
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185 | byte colormap[256]; |
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186 | colormapentry_t *curEntry = curMap->entries; |
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187 | for(int calcedCols = 0; calcedCols < numColors; curEntry++) |
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188 | { |
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189 | if(curEntry->startAndDir < 0) |
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190 | { |
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191 | for(int i = 0, ind = -curEntry->startAndDir; i < curEntry->length; i++, ind--) |
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192 | colormap[calcedCols++] = ind; |
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193 | } |
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194 | else |
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195 | { |
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196 | for(int i = 0, ind = curEntry->startAndDir; i < curEntry->length; i++, ind++) |
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197 | colormap[calcedCols++] = ind; |
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198 | } |
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199 | } |
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200 | |||
201 | for(int i = 0; i < 256; i++) |
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202 | { |
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203 | for(int j = 0; j < 256; j++) |
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204 | { |
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205 | skyc[i * 256 + j] = colormap[skyc[i * 256 + j] * numColors / 256]; |
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206 | } |
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207 | } |
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208 | } |
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209 | |||
210 | // Based on Textured Floor and Ceiling by DarkOne |
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211 | void DrawClouds(byte *vbuf, unsigned vbufPitch, int min_wallheight) |
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212 | { |
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213 | // Move clouds |
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214 | fixed moveDist = tics * curSky->speed; |
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215 | cloudx += FixedMul(moveDist,sintable[curSky->angle]); |
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216 | cloudy -= FixedMul(moveDist,costable[curSky->angle]); |
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217 | |||
218 | // Draw them |
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219 | int y0, halfheight; |
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220 | unsigned top_offset0; |
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221 | fixed dist; // distance to row projection |
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222 | fixed tex_step; // global step per one screen pixel |
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223 | fixed gu, gv, du, dv; // global texture coordinates |
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224 | int u, v; // local texture coordinates |
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225 | |||
226 | // ------ * prepare * -------- |
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227 | halfheight = viewheight >> 1; |
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228 | y0 = min_wallheight >> 3; // starting y value |
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229 | if(y0 > halfheight) |
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230 | return; // view obscured by walls |
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231 | if(!y0) y0 = 1; // don't let division by zero |
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232 | top_offset0 = vbufPitch * (halfheight - y0 - 1); |
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233 | |||
234 | // draw horizontal lines |
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235 | for(int y = y0, top_offset = top_offset0; y < halfheight; y++, top_offset -= vbufPitch) |
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236 | { |
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237 | dist = (heightnumerator / y) << 8; |
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238 | gu = viewx + FixedMul(dist, viewcos) + cloudx; |
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239 | gv = -viewy + FixedMul(dist, viewsin) + cloudy; |
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240 | tex_step = (dist << 8) / viewwidth / 175; |
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241 | du = FixedMul(tex_step, viewsin); |
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242 | dv = -FixedMul(tex_step, viewcos); |
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243 | gu -= (viewwidth >> 1)*du; |
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244 | gv -= (viewwidth >> 1)*dv; // starting point (leftmost) |
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245 | for(int x = 0, top_add = top_offset; x < viewwidth; x++, top_add++) |
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246 | { |
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247 | if(wallheight[x] >> 3 <= y) |
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248 | { |
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249 | u = (gu >> 13) & 255; |
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250 | v = (gv >> 13) & 255; |
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251 | vbuf[top_add] = skyc[((255 - u) << 8) + 255 - v]; |
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252 | } |
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253 | gu += du; |
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254 | gv += dv; |
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255 | } |
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256 | } |
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257 | } |
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258 | |||
259 | #endif><>=>>><>><>>>>>>>>>>>>>>>>> |