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Codechange: Warn if randomaction2 group count is not a power of 2.

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Previously noted by a comment, this does not need to be guarded against as non-powers of 2 will not cause issues beyond the choice of results being reduced.
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Peter Nelson 2021-05-02 00:34:17 +01:00 committed by PeterN
parent 6b0b1bb3de
commit 18fb1c3866
1 changed files with 4 additions and 0 deletions
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4
src/newgrf.cpp
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@ -5130,6 +5130,10 @@ static void NewSpriteGroup(ByteReader *buf)
group->lowest_randbit = buf->ReadByte(); group->lowest_randbit = buf->ReadByte();
byte num_groups = buf->ReadByte(); byte num_groups = buf->ReadByte();
if (!HasExactlyOneBit(num_groups)) {
grfmsg(1, "NewSpriteGroup: Random Action 2 nrand should be power of 2");
}
for (uint i = 0; i < num_groups; i++) { for (uint i = 0; i < num_groups; i++) {
group->groups.push_back(GetGroupFromGroupID(setid, type, buf->ReadWord())); group->groups.push_back(GetGroupFromGroupID(setid, type, buf->ReadWord()));
} }