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All that's happened to position is that numbers have been added to it. So it can't be negative, given that it wasn't before. So a regular modulo will do.

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Thomas Harte 2017-02-11 13:34:36 -05:00
parent c8e595d9aa
commit 6381e4e1b0
1 changed files with 1 additions and 1 deletions
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2
Machines/Atari2600/TIA.cpp
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@ -595,7 +595,7 @@ void TIA::draw_player(Player &player, CollisionType collision_identity, const in
{
position += (motion ^ 8);
is_moving_[position_identity] = false;
position = (position + 160)%160;
position %= 160;
}
// check for initial trigger; player.position is guaranteed to be less than 160 so this is easy