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| 37 | #include <funcpoint.h> |
37 | #include <funcpoint.h> |
| 38 | #include <material.h> |
38 | #include <material.h> |
| 39 | |
39 | |
| 40 | #include <glib.h> |
40 | #include <glib.h> |
| 41 | |
41 | |
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42 | rand_gen rndm (time (0)); |
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43 | |
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44 | tausworthe_random_generator::tausworthe_random_generator (uint32_t seed) |
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45 | { |
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46 | state [0] = max ( 2, seed * 69069U); |
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47 | state [1] = max ( 8, state [0] * 69069U); |
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48 | state [2] = max ( 16, state [1] * 69069U); |
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49 | state [3] = max (128, state [2] * 69069U); |
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50 | |
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51 | for (int i = 11; --i; ) |
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52 | operator ()(); |
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53 | } |
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54 | |
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55 | uint32_t |
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56 | tausworthe_random_generator::next () |
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57 | { |
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58 | state [0] = ((state [0] & 0xFFFFFFFEU) << 18U) ^ (((state [0] << 6U) ^ state [0]) >> 13U); |
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59 | state [1] = ((state [1] & 0xFFFFFFF8U) << 2U) ^ (((state [1] << 2U) ^ state [1]) >> 27U); |
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60 | state [2] = ((state [2] & 0xFFFFFFF0U) << 7U) ^ (((state [2] << 13U) ^ state [2]) >> 21U); |
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61 | state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U); |
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62 | |
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63 | return state [0] ^ state [1] ^ state [2] ^ state [3]; |
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64 | } |
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65 | |
| 42 | /* |
66 | /* |
| 43 | * The random functions here take luck into account when rolling random |
67 | * The random functions here take luck into account when rolling random |
| 44 | * dice or numbers. This function has less of an impact the larger the |
68 | * dice or numbers. This function has less of an impact the larger the |
| 45 | * difference becomes in the random numbers. IE, the effect is lessened |
69 | * difference becomes in the random numbers. IE, the effect is lessened |
| 46 | * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, |
70 | * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, |
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| 52 | * Roll a random number between min and max. Uses op to determine luck, |
76 | * Roll a random number between min and max. Uses op to determine luck, |
| 53 | * and if goodbad is non-zero, luck increases the roll, if zero, it decreases. |
77 | * and if goodbad is non-zero, luck increases the roll, if zero, it decreases. |
| 54 | * Generally, op should be the player/caster/hitter requesting the roll, |
78 | * Generally, op should be the player/caster/hitter requesting the roll, |
| 55 | * not the recipient (ie, the poor slob getting hit). [garbled 20010916] |
79 | * not the recipient (ie, the poor slob getting hit). [garbled 20010916] |
| 56 | */ |
80 | */ |
| 57 | |
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| 58 | int |
81 | int |
| 59 | random_roll (int min, int max, const object *op, int goodbad) |
82 | random_roll (int min, int max, const object *op, int goodbad) |
| 60 | { |
83 | { |
| 61 | int omin, diff, luck, base, ran; |
84 | int omin, diff, luck, base, ran; |
| 62 | |
85 | |
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| 180 | { |
203 | { |
| 181 | total += RANDOM () % size + 1; |
204 | total += RANDOM () % size + 1; |
| 182 | } |
205 | } |
| 183 | } |
206 | } |
| 184 | return (total); |
207 | return (total); |
| 185 | } |
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| 186 | |
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| 187 | /* |
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| 188 | * Another convenience function. Returns a number between min and max. |
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| 189 | * It is suggested one use these functions rather than RANDOM()%, as it |
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| 190 | * would appear that a number of off-by-one-errors exist due to improper |
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| 191 | * use of %. This should also prevent SIGFPE. |
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| 192 | */ |
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| 193 | |
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| 194 | int |
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| 195 | rndm (int min, int max) |
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| 196 | { |
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| 197 | int diff; |
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| 198 | |
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| 199 | diff = max - min + 1; |
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| 200 | if (max < 1 || diff < 1) |
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| 201 | return (min); |
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| 202 | |
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| 203 | return (RANDOM () % diff + min); |
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| 204 | } |
208 | } |
| 205 | |
209 | |
| 206 | /* decay and destroy perishable items in a map */ |
210 | /* decay and destroy perishable items in a map */ |
| 207 | void |
211 | void |
| 208 | maptile::decay_objects () |
212 | maptile::decay_objects () |
