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Fix banding issue in artic tree range

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Using tile index for randomization is a very very very bad idea
This commit is contained in:
Andreas Schmitt
2021-06-17 07:56:51 +02:00
committed by Jonathan G Rennison
parent 3b4cbd3323
commit 6c2152045a
1 changed files with 1 additions and 2 deletions
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3
src/tree_cmd.cpp
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@@ -194,8 +194,7 @@ static TreeType GetRandomTreeType(TileIndex tile, uint seed)
uint normalised_distance = (height_above_snow_line < 0) ? -height_above_snow_line : height_above_snow_line + 1; uint normalised_distance = (height_above_snow_line < 0) ? -height_above_snow_line : height_above_snow_line + 1;
bool arctic_tree = false; bool arctic_tree = false;
if (normalised_distance < lengthof(_arctic_tree_occurance)) { if (normalised_distance < lengthof(_arctic_tree_occurance)) {
uint adjusted_seed = (seed ^ tile) & 0xFF; arctic_tree = RandomRange(256) < _arctic_tree_occurance[normalised_distance];
arctic_tree = adjusted_seed < _arctic_tree_occurance[normalised_distance];
} }
if (height_above_snow_line < 0) { if (height_above_snow_line < 0) {
/* Below snow level mixed forest. */ /* Below snow level mixed forest. */