| /datum/dirt_random | A stream of random draws seeded by text, the same on every server and in the reference generator, so a mask drawn
here matches the reference's pixel for pixel. The nth draw, counting from 0, is md5("[seed]:[n]") cut to its first
six hex digits: a 24-bit integer, which a DM number holds exactly. |
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| /proc/dirt_perm_table | Returns the table the noise hashes lattice points through: 0 to 255, shuffled by the "dirt:perm" stream. |
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| /proc/dirt_noise_hash | Returns a lattice point's noise value, from 0 to 1 in steps of 1/255. |
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| /proc/dirt_value_noise | Returns smooth value noise from 0 to 1: the four lattice points round a sample, blended with a smoothstep. Each point
is dirt_noise_hash()'s, its chain's seed steps taken once and each column's step once, for the four. |
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| /proc/dirt_spread_noise | Returns two octaves of value noise, stretched back out to cover 0 to 1 (summed noise bunches round 0.5). |
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