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Update "open-simplex-noise-in-c" to fix undefined signed overflow.

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This commit is contained in:
bruvzg
2020-11-09 14:25:16 +02:00
parent 593e35346a
commit 70bdf0ecf2
2 changed files with 7 additions and 6 deletions
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11
thirdparty/misc/open-simplex-noise.c vendored
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@ -189,14 +189,15 @@ int open_simplex_noise(int64_t seed, struct osn_context *ctx)
permGradIndex3D = ctx->permGradIndex3D;
// -- GODOT end --
uint64_t seedU = seed;
for (i = 0; i < 256; i++)
source[i] = (int16_t) i;
seed = seed * 6364136223846793005LL + 1442695040888963407LL;
seed = seed * 6364136223846793005LL + 1442695040888963407LL;
seed = seed * 6364136223846793005LL + 1442695040888963407LL;
seedU = seedU * 6364136223846793005ULL + 1442695040888963407ULL;
seedU = seedU * 6364136223846793005ULL + 1442695040888963407ULL;
seedU = seedU * 6364136223846793005ULL + 1442695040888963407ULL;
for (i = 255; i >= 0; i--) {
seed = seed * 6364136223846793005LL + 1442695040888963407LL;
r = (int)((seed + 31) % (i + 1));
seedU = seedU * 6364136223846793005ULL + 1442695040888963407ULL;
r = (int)((seedU + 31) % (i + 1));
if (r < 0)
r += (i + 1);
perm[i] = source[r];