… | |
… | |
22 | */ |
22 | */ |
23 | |
23 | |
24 | /* Nov 95 - inserted USE_LIGHTING code stuff in here - b.t. */ |
24 | /* Nov 95 - inserted USE_LIGHTING code stuff in here - b.t. */ |
25 | |
25 | |
26 | #include <global.h> |
26 | #include <global.h> |
27 | #include <math.h> |
27 | #include <cmath> |
28 | |
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29 | /* Distance must be less than this for the object to be blocked. |
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30 | * An object is 1.0 wide, so if set to 0.5, it means the object |
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31 | * that blocks half the view (0.0 is complete block) will |
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32 | * block view in our tables. |
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33 | * .4 or less lets you see through walls. .5 is about right. |
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34 | */ |
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35 | |
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36 | #define SPACE_BLOCK 0.5 |
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37 | |
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38 | typedef struct blstr |
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39 | { |
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40 | int x[4], y[4]; |
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41 | int index; |
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42 | } blocks; |
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43 | |
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44 | // 31/32 == a speed hack |
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45 | // we would like to use 32 for speed, but the code loops endlessly |
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46 | // then, reason not yet identified, so only make the array use 32, |
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47 | // not the define's. |
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48 | blocks block[MAP_CLIENT_X][MAP_CLIENT_Y == 31 ? 32 : MAP_CLIENT_Y]; |
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49 | |
28 | |
50 | static void expand_lighted_sight (object *op); |
29 | static void expand_lighted_sight (object *op); |
51 | |
30 | |
52 | /* |
31 | enum { |
53 | * Used to initialise the array used by the LOS routines. |
32 | LOS_XI = 0x01, |
54 | * What this sets if that x,y blocks the view of bx,by |
33 | LOS_YI = 0x02, |
55 | * This then sets up a relation - for example, something |
34 | }; |
56 | * at 5,4 blocks view at 5,3 which blocks view at 5,2 |
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57 | * etc. So when we check 5,4 and find it block, we have |
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58 | * the data to know that 5,3 and 5,2 and 5,1 should also |
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59 | * be blocked. |
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60 | */ |
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61 | |
35 | |
62 | static void |
36 | struct los_info |
63 | set_block (int x, int y, int bx, int by) |
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64 | { |
37 | { |
65 | int index = block[x][y].index, i; |
38 | sint8 xo, yo; // obscure angle |
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39 | sint8 xe, ye; // angle deviation |
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40 | uint8 culled; // culled from "tree" |
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41 | uint8 queued; // already queued |
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42 | uint8 visible; |
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43 | uint8 flags; // LOS_XI/YI |
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44 | }; |
66 | |
45 | |
67 | /* Due to flipping, we may get duplicates - better safe than sorry. |
46 | // temporary storage for the los algorithm, |
68 | */ |
47 | // one los_info for each lightable map space |
69 | for (i = 0; i < index; i++) |
48 | static los_info los[MAP_CLIENT_X][MAP_CLIENT_Y]; |
70 | { |
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71 | if (block[x][y].x[i] == bx && block[x][y].y[i] == by) |
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72 | return; |
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73 | } |
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74 | |
49 | |
75 | block[x][y].x[index] = bx; |
50 | struct point |
76 | block[x][y].y[index] = by; |
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77 | block[x][y].index++; |
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78 | #ifdef LOS_DEBUG |
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79 | LOG (llevDebug, "setblock: added %d %d -> %d %d (%d)\n", x, y, bx, by, block[x][y].index); |
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80 | #endif |
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81 | } |
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82 | |
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83 | /* |
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84 | * initialises the array used by the LOS routines. |
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85 | */ |
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86 | |
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87 | /* since we are only doing the upper left quadrant, only |
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88 | * these spaces could possibly get blocked, since these |
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89 | * are the only ones further out that are still possibly in the |
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90 | * sightline. |
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91 | */ |
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92 | |
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93 | void |
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94 | init_block (void) |
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95 | { |
51 | { |
96 | int x, y, dx, dy, i; |
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97 | static int block_x[3] = { -1, -1, 0 }, |
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98 | block_y[3] = { -1, 0, -1 }; |
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99 | |
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100 | for (x = 0; x < MAP_CLIENT_X; x++) |
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101 | for (y = 0; y < MAP_CLIENT_Y; y++) |
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102 | block[x][y].index = 0; |
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103 | |
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104 | |
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105 | /* The table should be symmetric, so only do the upper left |
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106 | * quadrant - makes the processing easier. |
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107 | */ |
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108 | for (x = 1; x <= MAP_CLIENT_X / 2; x++) |
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109 | { |
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110 | for (y = 1; y <= MAP_CLIENT_Y / 2; y++) |
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111 | { |
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112 | for (i = 0; i < 3; i++) |
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113 | { |
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114 | dx = x + block_x[i]; |
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115 | dy = y + block_y[i]; |
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116 | |
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117 | /* center space never blocks */ |
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118 | if (x == MAP_CLIENT_X / 2 && y == MAP_CLIENT_Y / 2) |
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119 | continue; |
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120 | |
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121 | /* If its a straight line, its blocked */ |
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122 | if ((dx == x && x == MAP_CLIENT_X / 2) || (dy == y && y == MAP_CLIENT_Y / 2)) |
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123 | { |
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124 | /* For simplicity, we mirror the coordinates to block the other |
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125 | * quadrants. |
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126 | */ |
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127 | set_block (x, y, dx, dy); |
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128 | if (x == MAP_CLIENT_X / 2) |
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129 | set_block (x, MAP_CLIENT_Y - y - 1, dx, MAP_CLIENT_Y - dy - 1); |
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130 | else if (y == MAP_CLIENT_Y / 2) |
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131 | set_block (MAP_CLIENT_X - x - 1, y, MAP_CLIENT_X - dx - 1, dy); |
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132 | } |
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133 | else |
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134 | { |
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135 | float d1, r, s, l; |
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136 | |
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137 | /* We use the algorihm that found out how close the point |
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138 | * (x,y) is to the line from dx,dy to the center of the viewable |
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139 | * area. l is the distance from x,y to the line. |
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140 | * r is more a curiosity - it lets us know what direction (left/right) |
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141 | * the line is off |
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142 | */ |
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143 | |
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144 | d1 = (float) (pow (MAP_CLIENT_X / 2 - dx, 2.f) + pow (MAP_CLIENT_Y / 2 - dy, 2.f)); |
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145 | r = (float) ((dy - y) * (dy - MAP_CLIENT_Y / 2) - (dx - x) * (MAP_CLIENT_X / 2 - dx)) / d1; |
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146 | s = (float) ((dy - y) * (MAP_CLIENT_X / 2 - dx) - (dx - x) * (MAP_CLIENT_Y / 2 - dy)) / d1; |
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147 | l = FABS (sqrt (d1) * s); |
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148 | |
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149 | if (l <= SPACE_BLOCK) |
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150 | { |
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151 | /* For simplicity, we mirror the coordinates to block the other |
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152 | * quadrants. |
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153 | */ |
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154 | set_block (x, y, dx, dy); |
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155 | set_block (MAP_CLIENT_X - x - 1, y, MAP_CLIENT_X - dx - 1, dy); |
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156 | set_block (x, MAP_CLIENT_Y - y - 1, dx, MAP_CLIENT_Y - dy - 1); |
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157 | set_block (MAP_CLIENT_X - x - 1, MAP_CLIENT_Y - y - 1, MAP_CLIENT_X - dx - 1, MAP_CLIENT_Y - dy - 1); |
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158 | } |
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159 | } |
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160 | } |
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161 | } |
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162 | } |
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163 | } |
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164 | |
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165 | /* |
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166 | * Used to initialise the array used by the LOS routines. |
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167 | * x,y are indexes into the blocked[][] array. |
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168 | * This recursively sets the blocked line of sight view. |
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169 | * From the blocked[][] array, we know for example |
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170 | * that if some particular space is blocked, it blocks |
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171 | * the view of the spaces 'behind' it, and those blocked |
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172 | * spaces behind it may block other spaces, etc. |
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173 | * In this way, the chain of visibility is set. |
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174 | */ |
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175 | static void |
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176 | set_wall (object *op, int x, int y) |
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177 | { |
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178 | int i; |
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179 | |
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180 | for (i = 0; i < block[x][y].index; i++) |
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181 | { |
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182 | int dx = block[x][y].x[i], dy = block[x][y].y[i], ax, ay; |
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183 | |
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184 | /* ax, ay are the values as adjusted to be in the |
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185 | * socket look structure. |
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186 | */ |
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187 | ax = dx - (MAP_CLIENT_X - op->contr->ns->mapx) / 2; |
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188 | ay = dy - (MAP_CLIENT_Y - op->contr->ns->mapy) / 2; |
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189 | |
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190 | if (ax < 0 || ax >= op->contr->ns->mapx || ay < 0 || ay >= op->contr->ns->mapy) |
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191 | continue; |
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192 | #if 0 |
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193 | LOG (llevDebug, "blocked %d %d -> %d %d\n", dx, dy, ax, ay); |
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194 | #endif |
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195 | /* we need to adjust to the fact that the socket |
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196 | * code wants the los to start from the 0,0 |
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197 | * and not be relative to middle of los array. |
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198 | */ |
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199 | op->contr->blocked_los[ax][ay] = 100; |
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200 | set_wall (op, dx, dy); |
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201 | } |
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202 | } |
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203 | |
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204 | /* |
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205 | * Used to initialise the array used by the LOS routines. |
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206 | * op is the object, x and y values based on MAP_CLIENT_X and Y. |
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207 | * this is because they index the blocked[][] arrays. |
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208 | */ |
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209 | |
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210 | static void |
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211 | check_wall (object *op, int x, int y) |
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212 | { |
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213 | int ax, ay; |
52 | sint8 x, y; |
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53 | }; |
214 | |
54 | |
215 | if (!block[x][y].index) |
55 | // minimum size, but must be a power of two |
216 | return; |
56 | #define QUEUE_LENGTH ((MAP_CLIENT_X + MAP_CLIENT_Y) * 2) |
217 | |
57 | |
218 | /* ax, ay are coordinates as indexed into the look window */ |
58 | // a queue of spaces to calculate |
219 | ax = x - (MAP_CLIENT_X - op->contr->ns->mapx) / 2; |
59 | static point queue [QUEUE_LENGTH]; |
220 | ay = y - (MAP_CLIENT_Y - op->contr->ns->mapy) / 2; |
60 | static int q1, q2; // queue start, end |
221 | |
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222 | /* If the converted coordinates are outside the viewable |
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223 | * area for the client, return now. |
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224 | */ |
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225 | if (ax < 0 || ay < 0 || ax >= op->contr->ns->mapx || ay >= op->contr->ns->mapy) |
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226 | return; |
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227 | |
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228 | #if 0 |
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229 | LOG (llevDebug, "check_wall, ax,ay=%d, %d x,y = %d, %d blocksview = %d, %d\n", |
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230 | ax, ay, x, y, op->x + x - MAP_CLIENT_X / 2, op->y + y - MAP_CLIENT_Y / 2); |
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231 | #endif |
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232 | |
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233 | /* If this space is already blocked, prune the processing - presumably |
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234 | * whatever has set this space to be blocked has done the work and already |
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235 | * done the dependency chain. |
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236 | */ |
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237 | if (op->contr->blocked_los[ax][ay] == 100) |
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238 | return; |
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239 | |
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240 | |
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241 | if (get_map_flags (op->map, NULL, op->x + x - MAP_CLIENT_X / 2, op->y + y - MAP_CLIENT_Y / 2, NULL, NULL) & (P_BLOCKSVIEW | P_OUT_OF_MAP)) |
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242 | set_wall (op, x, y); |
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243 | } |
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244 | |
61 | |
245 | /* |
62 | /* |
246 | * Clears/initialises the los-array associated to the player |
63 | * Clears/initialises the los-array associated to the player |
247 | * controlling the object. |
64 | * controlling the object. |
248 | */ |
65 | */ |
249 | |
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250 | void |
66 | void |
251 | clear_los (player *pl) |
67 | player::clear_los (sint8 value) |
252 | { |
68 | { |
253 | /* This is safer than using the ns->mapx, mapy because |
69 | memset (los, value, sizeof (los)); |
254 | * we index the blocked_los as a 2 way array, so clearing |
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255 | * the first z spaces may not not cover the spaces we are |
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256 | * actually going to use |
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257 | */ |
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258 | memset (pl->blocked_los, 0, MAP_CLIENT_X * MAP_CLIENT_Y); |
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259 | } |
70 | } |
260 | |
71 | |
261 | /* |
72 | // enqueue a single mapspace, but only if it hasn't |
262 | * expand_sight goes through the array of what the given player is |
73 | // been enqueued yet. |
263 | * able to see, and expands the visible area a bit, so the player will, |
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264 | * to a certain degree, be able to see into corners. |
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265 | * This is somewhat suboptimal, would be better to improve the formula. |
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266 | */ |
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267 | |
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268 | static void |
74 | static void |
269 | expand_sight (object *op) |
75 | enqueue (sint8 dx, sint8 dy, uint8 flags = 0) |
270 | { |
76 | { |
271 | int i, x, y, dx, dy; |
77 | sint8 x = LOS_X0 + dx; |
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78 | sint8 y = LOS_Y0 + dy; |
272 | |
79 | |
273 | for (x = 1; x < op->contr->ns->mapx - 1; x++) /* loop over inner squares */ |
80 | if (x < 0 || x >= MAP_CLIENT_X) return; |
274 | for (y = 1; y < op->contr->ns->mapy - 1; y++) |
81 | if (y < 0 || y >= MAP_CLIENT_Y) return; |
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82 | |
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83 | los_info &l = los[x][y]; |
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84 | |
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85 | l.flags |= flags; |
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86 | |
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87 | if (l.queued) |
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88 | return; |
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89 | |
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90 | l.queued = 1; |
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91 | |
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92 | queue[q1].x = dx; |
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93 | queue[q1].y = dy; |
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94 | |
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95 | q1 = (q1 + 1) & (QUEUE_LENGTH - 1); |
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96 | } |
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97 | |
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98 | // run the los algorithm |
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99 | // this is a variant of a spiral los algorithm taken from |
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100 | // http://www.geocities.com/temerra/los_rays.html |
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101 | // which has been simplified and changed considerably, but |
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102 | // still is basically the same algorithm. |
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103 | static void |
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104 | do_los (object *op) |
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105 | { |
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106 | player *pl = op->contr; |
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107 | |
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108 | int max_radius = max (pl->ns->mapx, pl->ns->mapy) / 2; |
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109 | |
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110 | memset (los, 0, sizeof (los)); |
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111 | |
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112 | q1 = 0; q2 = 0; // initialise queue, not strictly required |
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113 | enqueue (0, 0); // enqueue center |
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114 | |
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115 | // treat the origin specially |
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116 | los[LOS_X0][LOS_Y0].visible = 1; |
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117 | pl->los[LOS_X0][LOS_Y0] = 0; |
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118 | |
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119 | // loop over all enqueued points until the queue is empty |
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120 | // the order in which this is done ensures that we |
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121 | // never touch a mapspace whose input spaces we haven't checked |
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122 | // yet. |
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123 | while (q1 != q2) |
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124 | { |
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125 | sint8 dx = queue[q2].x; |
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126 | sint8 dy = queue[q2].y; |
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127 | |
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128 | q2 = (q2 + 1) & (QUEUE_LENGTH - 1); |
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129 | |
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130 | sint8 x = LOS_X0 + dx; |
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131 | sint8 y = LOS_Y0 + dy; |
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132 | |
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133 | //int distance = idistance (dx, dy); if (distance > max_radius) continue;//D |
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134 | int distance = 0;//D |
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135 | |
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136 | los_info &l = los[x][y]; |
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137 | |
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138 | if (expect_true (l.flags & (LOS_XI | LOS_YI))) |
275 | { |
139 | { |
276 | if (!op->contr->blocked_los[x][y] && |
140 | l.culled = 1; |
277 | !(get_map_flags (op->map, NULL, |
141 | |
278 | op->x - op->contr->ns->mapx / 2 + x, |
142 | // check contributing spaces, first horizontal |
279 | op->y - op->contr->ns->mapy / 2 + y, NULL, NULL) & (P_BLOCKSVIEW | P_OUT_OF_MAP))) |
143 | if (expect_true (l.flags & LOS_XI)) |
280 | { |
144 | { |
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145 | los_info *xi = &los[x - sign (dx)][y]; |
281 | |
146 | |
282 | for (i = 1; i <= 8; i += 1) |
147 | // don't cull unless obscured |
283 | { /* mark all directions */ |
148 | l.culled &= !xi->visible; |
284 | dx = x + freearr_x[i]; |
149 | |
285 | dy = y + freearr_y[i]; |
150 | /* merge input space */ |
286 | if (op->contr->blocked_los[dx][dy] > 0) /* for any square blocked */ |
151 | if (expect_false (xi->xo || xi->yo)) |
287 | op->contr->blocked_los[dx][dy] = -1; |
152 | { |
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153 | // The X input can provide two main pieces of information: |
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154 | // 1. Progressive X obscurity. |
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155 | // 2. Recessive Y obscurity. |
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156 | |
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157 | // Progressive X obscurity, favouring recessive input angle |
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158 | if (xi->xe > 0 && l.xo == 0) |
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159 | { |
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160 | l.xe = xi->xe - xi->yo; |
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161 | l.ye = xi->ye + xi->yo; |
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162 | l.xo = xi->xo; |
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163 | l.yo = xi->yo; |
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164 | } |
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165 | |
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166 | // Recessive Y obscurity |
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167 | if (xi->ye <= 0 && xi->yo > 0 && xi->xe > 0) |
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168 | { |
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169 | l.ye = xi->yo + xi->ye; |
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170 | l.xe = xi->xe - xi->yo; |
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171 | l.xo = xi->xo; |
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172 | l.yo = xi->yo; |
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173 | } |
288 | } |
174 | } |
289 | } |
175 | } |
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176 | |
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177 | // check contributing spaces, last vertical, identical structure |
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178 | if (expect_true (l.flags & LOS_YI)) |
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179 | { |
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180 | los_info *yi = &los[x][y - sign (dy)]; |
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181 | |
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182 | // don't cull unless obscured |
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183 | l.culled &= !yi->visible; |
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184 | |
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185 | /* merge input space */ |
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186 | if (expect_false (yi->yo || yi->xo)) |
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187 | { |
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188 | // The Y input can provide two main pieces of information: |
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189 | // 1. Progressive Y obscurity. |
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190 | // 2. Recessive X obscurity. |
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191 | |
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192 | // Progressive Y obscurity, favouring recessive input angle |
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193 | if (yi->ye > 0 && l.yo == 0) |
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194 | { |
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195 | l.ye = yi->ye - yi->xo; |
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196 | l.xe = yi->xe + yi->xo; |
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197 | l.yo = yi->yo; |
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198 | l.xo = yi->xo; |
|
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199 | } |
|
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200 | |
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201 | // Recessive X obscurity |
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202 | if (yi->xe <= 0 && yi->xo > 0 && yi->ye > 0) |
|
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203 | { |
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204 | l.xe = yi->xo + yi->xe; |
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205 | l.ye = yi->ye - yi->xo; |
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206 | l.yo = yi->yo; |
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207 | l.xo = yi->xo; |
|
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208 | } |
|
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209 | } |
|
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210 | } |
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211 | |
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212 | // check whether this space blocks the view |
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213 | maptile *m = op->map; |
|
|
214 | sint16 nx = op->x + dx; |
|
|
215 | sint16 ny = op->y + dy; |
|
|
216 | |
|
|
217 | if (expect_true (!xy_normalise (m, nx, ny)) |
|
|
218 | || expect_false (m->at (nx, ny).flags () & P_BLOCKSVIEW)) |
|
|
219 | { |
|
|
220 | l.xo = l.xe = abs (dx); |
|
|
221 | l.yo = l.ye = abs (dy); |
|
|
222 | |
|
|
223 | // we obscure dependents, but might be visible |
|
|
224 | // copy the los from the square towards the player, |
|
|
225 | // so outward diagonal corners are lit. |
|
|
226 | pl->los[x][y] = los[x - sign0 (dx)][y - sign0 (dy)].visible ? 0 : LOS_BLOCKED; |
|
|
227 | l.visible = false; |
|
|
228 | } |
|
|
229 | else |
|
|
230 | { |
|
|
231 | // we are not blocked, so calculate visibility, by checking |
|
|
232 | // whether we are inside or outside the shadow |
|
|
233 | l.visible = (l.xe <= 0 || l.xe > l.xo) |
|
|
234 | && (l.ye <= 0 || l.ye > l.yo); |
|
|
235 | |
|
|
236 | pl->los[x][y] = l.culled ? LOS_BLOCKED |
|
|
237 | : l.visible ? max (0, 2 - max_radius + distance) |
|
|
238 | : 3; |
|
|
239 | } |
|
|
240 | |
290 | } |
241 | } |
291 | |
242 | |
292 | if (op->map->darkness > 0) /* player is on a dark map */ |
243 | // Expands by the unit length in each component's current direction. |
293 | expand_lighted_sight (op); |
244 | // If a component has no direction, then it is expanded in both of its |
294 | |
245 | // positive and negative directions. |
295 | /* clear mark squares */ |
246 | if (!l.culled) |
296 | for (x = 0; x < op->contr->ns->mapx; x++) |
247 | { |
297 | for (y = 0; y < op->contr->ns->mapy; y++) |
248 | if (dx >= 0) enqueue (dx + 1, dy, LOS_XI); |
298 | if (op->contr->blocked_los[x][y] < 0) |
249 | if (dx <= 0) enqueue (dx - 1, dy, LOS_XI); |
299 | op->contr->blocked_los[x][y] = 0; |
250 | if (dy >= 0) enqueue (dx, dy + 1, LOS_YI); |
|
|
251 | if (dy <= 0) enqueue (dx, dy - 1, LOS_YI); |
|
|
252 | } |
|
|
253 | } |
300 | } |
254 | } |
301 | |
255 | |
302 | /* returns true if op carries one or more lights |
256 | /* returns true if op carries one or more lights |
303 | * This is a trivial function now days, but it used to |
257 | * This is a trivial function now days, but it used to |
304 | * be a bit longer. Probably better for callers to just |
258 | * be a bit longer. Probably better for callers to just |
305 | * check the op->glow_radius instead of calling this. |
259 | * check the op->glow_radius instead of calling this. |
306 | */ |
260 | */ |
307 | |
|
|
308 | int |
261 | int |
309 | has_carried_lights (const object *op) |
262 | has_carried_lights (const object *op) |
310 | { |
263 | { |
311 | /* op may glow! */ |
264 | /* op may glow! */ |
312 | if (op->glow_radius > 0) |
265 | if (op->glow_radius > 0) |
313 | return 1; |
266 | return 1; |
314 | |
267 | |
315 | return 0; |
268 | return 0; |
316 | } |
269 | } |
317 | |
270 | |
|
|
271 | /* radius, distance => lightness adjust */ |
|
|
272 | static sint8 light_atten[MAX_LIGHT_RADIUS * 2 + 1][MAX_LIGHT_RADIUS * 3 / 2 + 1]; |
|
|
273 | static sint8 vision_atten[MAX_DARKNESS + 1][MAX_DARKNESS * 3 / 2 + 1]; |
|
|
274 | |
|
|
275 | static struct los_init |
|
|
276 | { |
|
|
277 | los_init () |
|
|
278 | { |
|
|
279 | /* for lights */ |
|
|
280 | for (int radius = -MAX_LIGHT_RADIUS; radius <= MAX_LIGHT_RADIUS; ++radius) |
|
|
281 | for (int distance = 0; distance <= MAX_LIGHT_RADIUS * 3 / 2; ++distance) |
|
|
282 | { |
|
|
283 | // max intensity |
|
|
284 | int intensity = min (LOS_MAX, abs (radius) + 1); |
|
|
285 | |
|
|
286 | // actual intensity |
|
|
287 | intensity = max (0, lerp_rd (distance, 0, abs (radius) + 1, intensity, 0)); |
|
|
288 | |
|
|
289 | light_atten [radius + MAX_LIGHT_RADIUS][distance] = radius < 0 |
|
|
290 | ? min (3, intensity) |
|
|
291 | : LOS_MAX - intensity; |
|
|
292 | } |
|
|
293 | |
|
|
294 | /* for general vision */ |
|
|
295 | for (int radius = 0; radius <= MAX_DARKNESS; ++radius) |
|
|
296 | for (int distance = 0; distance <= MAX_DARKNESS * 3 / 2; ++distance) |
|
|
297 | { |
|
|
298 | vision_atten [radius][distance] = distance <= radius ? 3 : 4; |
|
|
299 | } |
|
|
300 | } |
|
|
301 | } los_init; |
|
|
302 | |
|
|
303 | sint8 |
|
|
304 | los_brighten (sint8 b, sint8 l) |
|
|
305 | { |
|
|
306 | return b == LOS_BLOCKED ? b : min (b, l); |
|
|
307 | } |
|
|
308 | |
|
|
309 | sint8 |
|
|
310 | los_darken (sint8 b, sint8 l) |
|
|
311 | { |
|
|
312 | return max (b, l); |
|
|
313 | } |
|
|
314 | |
|
|
315 | template<sint8 change_it (sint8, sint8)> |
318 | static void |
316 | static void |
319 | expand_lighted_sight (object *op) |
317 | apply_light (object *op, int dx, int dy, int light, const sint8 *atten_table) |
320 | { |
318 | { |
321 | int x, y, darklevel, ax, ay, basex, basey, mflags, light, x1, y1; |
319 | // min or max the circular area around basex, basey |
|
|
320 | player *pl = op->contr; |
|
|
321 | |
|
|
322 | dx += LOS_X0; |
|
|
323 | dy += LOS_Y0; |
|
|
324 | |
|
|
325 | int hx = op->contr->ns->mapx / 2; |
|
|
326 | int hy = op->contr->ns->mapy / 2; |
|
|
327 | |
|
|
328 | int ax0 = max (LOS_X0 - hx, dx - light); |
|
|
329 | int ay0 = max (LOS_Y0 - hy, dy - light); |
|
|
330 | int ax1 = min (dx + light, LOS_X0 + hx); |
|
|
331 | int ay1 = min (dy + light, LOS_Y0 + hy); |
|
|
332 | |
|
|
333 | for (int ax = ax0; ax <= ax1; ax++) |
|
|
334 | for (int ay = ay0; ay <= ay1; ay++) |
|
|
335 | pl->los[ax][ay] = |
|
|
336 | change_it (pl->los[ax][ay], atten_table [idistance (ax - dx, ay - dy)]); |
|
|
337 | } |
|
|
338 | |
|
|
339 | /* add light, by finding all (non-null) nearby light sources, then |
|
|
340 | * mark those squares specially. |
|
|
341 | */ |
|
|
342 | static void |
|
|
343 | apply_lights (object *op) |
|
|
344 | { |
|
|
345 | int darklevel, mflags, light, x1, y1; |
322 | maptile *m = op->map; |
346 | maptile *m = op->map; |
323 | sint16 nx, ny; |
347 | sint16 nx, ny; |
324 | |
348 | |
325 | darklevel = m->darkness; |
349 | darklevel = m->darkness; |
326 | |
350 | |
327 | /* If the player can see in the dark, lower the darklevel for him */ |
351 | /* If the player can see in the dark, lower the darklevel for him */ |
328 | if (QUERY_FLAG (op, FLAG_SEE_IN_DARK)) |
352 | if (QUERY_FLAG (op, FLAG_SEE_IN_DARK)) |
329 | darklevel -= 2; |
353 | darklevel -= LOS_MAX / 2; |
330 | |
|
|
331 | /* add light, by finding all (non-null) nearby light sources, then |
|
|
332 | * mark those squares specially. If the darklevel<1, there is no |
|
|
333 | * reason to do this, so we skip this function |
|
|
334 | */ |
|
|
335 | |
|
|
336 | if (darklevel < 1) |
|
|
337 | return; |
|
|
338 | |
354 | |
339 | /* Do a sanity check. If not valid, some code below may do odd |
355 | /* Do a sanity check. If not valid, some code below may do odd |
340 | * things. |
356 | * things. |
341 | */ |
357 | */ |
342 | if (darklevel > MAX_DARKNESS) |
358 | if (darklevel > MAX_DARKNESS) |
343 | { |
359 | { |
344 | LOG (llevError, "Map darkness for %s on %s is too high (%d)\n", &op->name, &op->map->path, darklevel); |
360 | LOG (llevError, "Map darkness for %s on %s is too high (%d)\n", &op->name, &op->map->path, darklevel); |
345 | darklevel = MAX_DARKNESS; |
361 | darklevel = MAX_DARKNESS; |
346 | } |
362 | } |
347 | |
363 | |
348 | /* First, limit player furthest (unlighted) vision */ |
364 | int half_x = op->contr->ns->mapx / 2; |
349 | for (x = 0; x < op->contr->ns->mapx; x++) |
365 | int half_y = op->contr->ns->mapy / 2; |
350 | for (y = 0; y < op->contr->ns->mapy; y++) |
|
|
351 | if (op->contr->blocked_los[x][y] != 100) |
|
|
352 | op->contr->blocked_los[x][y] = MAX_LIGHT_RADII; |
|
|
353 | |
366 | |
354 | /* the spaces[] darkness value contains the information we need. |
367 | int min_x = op->x - half_x - MAX_LIGHT_RADIUS; |
355 | * Only process the area of interest. |
368 | int min_y = op->y - half_y - MAX_LIGHT_RADIUS; |
356 | * the basex, basey values represent the position in the op->contr->blocked_los |
369 | int max_x = op->x + half_x + MAX_LIGHT_RADIUS; |
357 | * array. Its easier to just increment them here (and start with the right |
370 | int max_y = op->y + half_y + MAX_LIGHT_RADIUS; |
358 | * value) than to recalculate them down below. |
371 | |
359 | */ |
372 | int pass2 = 0; // negative lights have an extra pass |
360 | for (x = (op->x - op->contr->ns->mapx / 2 - MAX_LIGHT_RADII), basex = -MAX_LIGHT_RADII; |
373 | |
361 | x <= (op->x + op->contr->ns->mapx / 2 + MAX_LIGHT_RADII); x++, basex++) |
374 | if (darklevel < 1) |
|
|
375 | pass2 = 1; |
|
|
376 | else |
362 | { |
377 | { |
|
|
378 | /* first, make everything totally dark */ |
|
|
379 | for (int dx = -half_x; dx <= half_x; dx++) |
|
|
380 | for (int dy = -half_x; dy <= half_y; dy++) |
|
|
381 | if (op->contr->los[dx + LOS_X0][dy + LOS_Y0] != LOS_BLOCKED) |
|
|
382 | op->contr->los[dx + LOS_X0][dy + LOS_Y0] = LOS_MAX; |
363 | |
383 | |
364 | for (y = (op->y - op->contr->ns->mapy / 2 - MAX_LIGHT_RADII), basey = -MAX_LIGHT_RADII; |
384 | /* |
365 | y <= (op->y + op->contr->ns->mapy / 2 + MAX_LIGHT_RADII); y++, basey++) |
385 | * Only process the area of interest. |
|
|
386 | * the basex, basey values represent the position in the op->contr->los |
|
|
387 | * array. Its easier to just increment them here (and start with the right |
|
|
388 | * value) than to recalculate them down below. |
|
|
389 | */ |
|
|
390 | for (int x = min_x; x <= max_x; x++) |
|
|
391 | for (int y = min_y; y <= max_y; y++) |
366 | { |
392 | { |
|
|
393 | maptile *m = op->map; |
|
|
394 | sint16 nx = x; |
|
|
395 | sint16 ny = y; |
|
|
396 | |
|
|
397 | if (!xy_normalise (m, nx, ny)) |
|
|
398 | continue; |
|
|
399 | |
|
|
400 | mapspace &ms = m->at (nx, ny); |
|
|
401 | ms.update (); |
|
|
402 | sint8 light = ms.light; |
|
|
403 | |
|
|
404 | if (expect_false (light)) |
|
|
405 | if (light < 0) |
|
|
406 | pass2 = 1; |
|
|
407 | else |
|
|
408 | apply_light<los_brighten> (op, x - op->x, y - op->y, light, light_atten [light + MAX_LIGHT_RADIUS]); |
|
|
409 | } |
|
|
410 | |
|
|
411 | /* grant some vision to the player, based on the darklevel */ |
|
|
412 | { |
|
|
413 | int light = clamp (MAX_DARKNESS - darklevel, 0, MAX_DARKNESS); |
|
|
414 | |
|
|
415 | apply_light<los_brighten> (op, 0, 0, light, vision_atten [light]); |
|
|
416 | } |
|
|
417 | } |
|
|
418 | |
|
|
419 | // possibly do 2nd pass for rare negative glow radii |
|
|
420 | // for effect, those are always considered to be stronger than anything else |
|
|
421 | // but they can't darken a place completely |
|
|
422 | if (pass2) |
|
|
423 | for (int x = min_x; x <= max_x; x++) |
|
|
424 | for (int y = min_y; y <= max_y; y++) |
|
|
425 | { |
367 | m = op->map; |
426 | maptile *m = op->map; |
368 | nx = x; |
427 | sint16 nx = x; |
369 | ny = y; |
428 | sint16 ny = y; |
370 | |
429 | |
371 | mflags = get_map_flags (m, &m, nx, ny, &nx, &ny); |
430 | if (!xy_normalise (m, nx, ny)) |
372 | |
|
|
373 | if (mflags & P_OUT_OF_MAP) |
|
|
374 | continue; |
431 | continue; |
375 | |
432 | |
376 | /* This space is providing light, so we need to brighten up the |
433 | mapspace &ms = m->at (nx, ny); |
377 | * spaces around here. |
434 | ms.update (); |
378 | */ |
435 | sint8 light = ms.light; |
379 | light = GET_MAP_LIGHT (m, nx, ny); |
|
|
380 | if (light != 0) |
|
|
381 | { |
|
|
382 | #if 0 |
|
|
383 | LOG (llevDebug, "expand_lighted_sight: Found light at x=%d, y=%d, basex=%d, basey=%d\n", x, y, basex, basey); |
|
|
384 | #endif |
|
|
385 | for (ax = basex - light; ax <= basex + light; ax++) |
|
|
386 | { |
|
|
387 | if (ax < 0 || ax >= op->contr->ns->mapx) |
|
|
388 | continue; |
|
|
389 | |
436 | |
390 | for (ay = basey - light; ay <= basey + light; ay++) |
437 | if (expect_false (light < 0)) |
391 | { |
438 | apply_light<los_darken> (op, x - op->x, y - op->y, -light, light_atten [light + MAX_LIGHT_RADIUS]); |
392 | if (ay < 0 || ay >= op->contr->ns->mapy) |
|
|
393 | continue; |
|
|
394 | |
|
|
395 | /* If the space is fully blocked, do nothing. Otherwise, we |
|
|
396 | * brighten the space. The further the light is away from the |
|
|
397 | * source (basex-x), the less effect it has. Though light used |
|
|
398 | * to dim in a square manner, it now dims in a circular manner |
|
|
399 | * using the the pythagorean theorem. glow_radius still |
|
|
400 | * represents the radius |
|
|
401 | */ |
|
|
402 | if (op->contr->blocked_los[ax][ay] != 100) |
|
|
403 | { |
|
|
404 | x1 = abs (basex - ax) * abs (basex - ax); |
|
|
405 | y1 = abs (basey - ay) * abs (basey - ay); |
|
|
406 | |
|
|
407 | if (light > 0) op->contr->blocked_los[ax][ay] -= max (light - isqrt (x1 + y1), 0); |
|
|
408 | if (light < 0) op->contr->blocked_los[ax][ay] -= min (light + isqrt (x1 + y1), 0); |
|
|
409 | } |
|
|
410 | } |
|
|
411 | } |
|
|
412 | } |
|
|
413 | } |
|
|
414 | } |
|
|
415 | |
|
|
416 | /* Outdoor should never really be completely pitch black dark like |
|
|
417 | * a dungeon, so let the player at least see a little around themselves |
|
|
418 | */ |
|
|
419 | if (op->map->outdoor && darklevel > (MAX_DARKNESS - 3)) |
|
|
420 | { |
|
|
421 | if (op->contr->blocked_los[op->contr->ns->mapx / 2][op->contr->ns->mapy / 2] > (MAX_DARKNESS - 3)) |
|
|
422 | op->contr->blocked_los[op->contr->ns->mapx / 2][op->contr->ns->mapy / 2] = MAX_DARKNESS - 3; |
|
|
423 | |
|
|
424 | for (x = -1; x <= 1; x++) |
|
|
425 | for (y = -1; y <= 1; y++) |
|
|
426 | { |
|
|
427 | if (op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] > (MAX_DARKNESS - 2)) |
|
|
428 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] = MAX_DARKNESS - 2; |
|
|
429 | } |
439 | } |
430 | } |
|
|
431 | |
|
|
432 | /* grant some vision to the player, based on the darklevel */ |
|
|
433 | for (x = darklevel - MAX_DARKNESS; x < MAX_DARKNESS + 1 - darklevel; x++) |
|
|
434 | for (y = darklevel - MAX_DARKNESS; y < MAX_DARKNESS + 1 - darklevel; y++) |
|
|
435 | if (!(op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] == 100)) |
|
|
436 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] -= |
|
|
437 | MAX (0, 6 - darklevel - MAX (abs (x), abs (y))); |
|
|
438 | } |
440 | } |
439 | |
441 | |
440 | /* blinded_sight() - sets all veiwable squares to blocked except |
442 | /* blinded_sight() - sets all viewable squares to blocked except |
441 | * for the one the central one that the player occupies. A little |
443 | * for the one the central one that the player occupies. A little |
442 | * odd that you can see yourself (and what your standing on), but |
444 | * odd that you can see yourself (and what your standing on), but |
443 | * really need for any reasonable game play. |
445 | * really need for any reasonable game play. |
444 | */ |
446 | */ |
445 | static void |
447 | static void |
446 | blinded_sight (object *op) |
448 | blinded_sight (object *op) |
447 | { |
449 | { |
448 | int x, y; |
450 | op->contr->los[LOS_X0][LOS_Y0] = 1; |
449 | |
|
|
450 | for (x = 0; x < op->contr->ns->mapx; x++) |
|
|
451 | for (y = 0; y < op->contr->ns->mapy; y++) |
|
|
452 | op->contr->blocked_los[x][y] = 100; |
|
|
453 | |
|
|
454 | op->contr->blocked_los[op->contr->ns->mapx / 2][op->contr->ns->mapy / 2] = 0; |
|
|
455 | } |
451 | } |
456 | |
452 | |
457 | /* |
453 | /* |
458 | * update_los() recalculates the array which specifies what is |
454 | * update_los() recalculates the array which specifies what is |
459 | * visible for the given player-object. |
455 | * visible for the given player-object. |
460 | */ |
456 | */ |
461 | void |
457 | void |
462 | update_los (object *op) |
458 | update_los (object *op) |
463 | { |
459 | { |
464 | int dx = op->contr->ns->mapx / 2, dy = op->contr->ns->mapy / 2, x, y; |
|
|
465 | |
|
|
466 | if (QUERY_FLAG (op, FLAG_REMOVED)) |
460 | if (QUERY_FLAG (op, FLAG_REMOVED)) |
467 | return; |
461 | return; |
468 | |
462 | |
469 | clear_los (op->contr); |
463 | op->contr->clear_los (); |
470 | |
464 | |
471 | if (QUERY_FLAG (op, FLAG_WIZ) /* ||XRAYS(op) */ ) |
465 | if (QUERY_FLAG (op, FLAG_WIZ) /* ||XRAYS(op) */ ) |
472 | return; |
466 | memset (op->contr->los, 0, sizeof (op->contr->los)); |
473 | |
|
|
474 | /* For larger maps, this is more efficient than the old way which |
|
|
475 | * used the chaining of the block array. Since many space views could |
|
|
476 | * be blocked by different spaces in front, this mean that a lot of spaces |
|
|
477 | * could be examined multile times, as each path would be looked at. |
|
|
478 | */ |
|
|
479 | for (x = (MAP_CLIENT_X - op->contr->ns->mapx) / 2 - 1; x < (MAP_CLIENT_X + op->contr->ns->mapx) / 2 + 1; x++) |
|
|
480 | for (y = (MAP_CLIENT_Y - op->contr->ns->mapy) / 2 - 1; y < (MAP_CLIENT_Y + op->contr->ns->mapy) / 2 + 1; y++) |
|
|
481 | check_wall (op, x, y); |
|
|
482 | |
|
|
483 | /* do the los of the player. 3 (potential) cases */ |
|
|
484 | if (QUERY_FLAG (op, FLAG_BLIND)) /* player is blind */ |
467 | else if (QUERY_FLAG (op, FLAG_BLIND)) /* player is blind */ |
485 | blinded_sight (op); |
468 | blinded_sight (op); |
486 | else |
469 | else |
487 | expand_sight (op); |
470 | { |
|
|
471 | do_los (op); |
|
|
472 | apply_lights (op); |
|
|
473 | } |
488 | |
474 | |
489 | //TODO: no range-checking whatsoever :( |
|
|
490 | if (QUERY_FLAG (op, FLAG_XRAYS)) |
475 | if (QUERY_FLAG (op, FLAG_XRAYS)) |
491 | for (int x = -2; x <= 2; x++) |
476 | for (int dx = -2; dx <= 2; dx++) |
492 | for (int y = -2; y <= 2; y++) |
477 | for (int dy = -2; dy <= 2; dy++) |
493 | op->contr->blocked_los[dx + x][dy + y] = 0; |
478 | op->contr->los[dx + LOS_X0][dy + LOS_X0] = 0; |
494 | } |
479 | } |
495 | |
480 | |
496 | /* update all_map_los is like update_all_los below, |
481 | /* update all_map_los is like update_all_los below, |
497 | * but updates everyone on the map, no matter where they |
482 | * but updates everyone on the map, no matter where they |
498 | * are. This generally should not be used, as a per |
483 | * are. This generally should not be used, as a per |
… | |
… | |
587 | } |
572 | } |
588 | } |
573 | } |
589 | } |
574 | } |
590 | |
575 | |
591 | /* |
576 | /* |
592 | * Debug-routine which dumps the array which specifies the visible |
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593 | * area of a player. Triggered by the z key in DM mode. |
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594 | */ |
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595 | void |
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596 | print_los (object *op) |
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597 | { |
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598 | int x, y; |
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599 | char buf[50], buf2[10]; |
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600 | |
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601 | strcpy (buf, " "); |
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602 | |
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603 | for (x = 0; x < op->contr->ns->mapx; x++) |
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604 | { |
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605 | sprintf (buf2, "%2d", x); |
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606 | strcat (buf, buf2); |
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607 | } |
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608 | |
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609 | new_draw_info (NDI_UNIQUE, 0, op, buf); |
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610 | |
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611 | for (y = 0; y < op->contr->ns->mapy; y++) |
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612 | { |
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613 | sprintf (buf, "%2d:", y); |
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614 | |
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615 | for (x = 0; x < op->contr->ns->mapx; x++) |
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616 | { |
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617 | sprintf (buf2, " %1d", op->contr->blocked_los[x][y]); |
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618 | strcat (buf, buf2); |
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619 | } |
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620 | |
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621 | new_draw_info (NDI_UNIQUE, 0, op, buf); |
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|
622 | } |
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|
623 | } |
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624 | |
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625 | /* |
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626 | * make_sure_seen: The object is supposed to be visible through walls, thus |
577 | * make_sure_seen: The object is supposed to be visible through walls, thus |
627 | * check if any players are nearby, and edit their LOS array. |
578 | * check if any players are nearby, and edit their LOS array. |
628 | */ |
579 | */ |
629 | |
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|
630 | void |
580 | void |
631 | make_sure_seen (const object *op) |
581 | make_sure_seen (const object *op) |
632 | { |
582 | { |
633 | for_all_players (pl) |
583 | for_all_players (pl) |
634 | if (pl->ob->map == op->map && |
584 | if (pl->ob->map == op->map && |
635 | pl->ob->y - pl->ns->mapy / 2 <= op->y && |
585 | pl->ob->y - pl->ns->mapy / 2 <= op->y && |
636 | pl->ob->y + pl->ns->mapy / 2 >= op->y && pl->ob->x - pl->ns->mapx / 2 <= op->x && pl->ob->x + pl->ns->mapx / 2 >= op->x) |
586 | pl->ob->y + pl->ns->mapy / 2 >= op->y && pl->ob->x - pl->ns->mapx / 2 <= op->x && pl->ob->x + pl->ns->mapx / 2 >= op->x) |
637 | pl->blocked_los[pl->ns->mapx / 2 + op->x - pl->ob->x][pl->ns->mapy / 2 + op->y - pl->ob->y] = 0; |
587 | pl->los[op->x - pl->ob->x + LOS_X0][op->y - pl->ob->y + LOS_X0] = 0; |
638 | } |
588 | } |
639 | |
589 | |
640 | /* |
590 | /* |
641 | * make_sure_not_seen: The object which is supposed to be visible through |
591 | * make_sure_not_seen: The object which is supposed to be visible through |
642 | * walls has just been removed from the map, so update the los of any |
592 | * walls has just been removed from the map, so update the los of any |
643 | * players within its range |
593 | * players within its range |
644 | */ |
594 | */ |
645 | |
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646 | void |
595 | void |
647 | make_sure_not_seen (const object *op) |
596 | make_sure_not_seen (const object *op) |
648 | { |
597 | { |
649 | for_all_players (pl) |
598 | for_all_players (pl) |
650 | if (pl->ob->map == op->map && |
599 | if (pl->ob->map == op->map && |