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(svn r9371) -Feature: Add support for variable snow lines in the arctic climate, supplied

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by newgrf files. When this is enabled forests cannot be built below the highest
snow line, and farms can't be built above it. Houses still use the
_opt.snow_line so they are all consistent, so to make them respect the snowline
you may want to use some newhouses features as well.
This commit is contained in:
maedhros
2007-03-20 13:47:00 +00:00
parent 7812f7fd0a
commit 48f2bf9bb1
13 changed files with 122 additions and 14 deletions
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7
src/tree_cmd.cpp
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@@ -9,6 +9,7 @@
#include "table/tree_land.h"
#include "functions.h"
#include "map.h"
#include "landscape.h"
#include "tile.h"
#include "tree_map.h"
#include "viewport.h"
@@ -53,7 +54,7 @@ static void PlaceTree(TileIndex tile, uint32 r)
MakeTree(tile, tree, GB(r, 22, 2), min(GB(r, 16, 3), 6), TREE_GROUND_GRASS, 0);
// above snowline?
if (_opt.landscape == LT_HILLY && GetTileZ(tile) > _opt.snow_line) {
if (_opt.landscape == LT_HILLY && GetTileZ(tile) > GetSnowLine()) {
SetTreeGroundDensity(tile, TREE_GROUND_SNOW_DESERT, 3);
SetTreeCounter(tile, (TreeGround)GB(r, 24, 3));
} else {
@@ -150,7 +151,7 @@ void PlaceTreesRandomly()
j = GetTileZ(tile) / TILE_HEIGHT * 2;
while (j--) {
/* Above snowline more trees! */
if (_opt.landscape == LT_HILLY && ht > _opt.snow_line) {
if (_opt.landscape == LT_HILLY && ht > GetSnowLine()) {
PlaceTreeAtSameHeight(tile, ht);
PlaceTreeAtSameHeight(tile, ht);
};
@@ -496,7 +497,7 @@ static void TileLoopTreesDesert(TileIndex tile)
static void TileLoopTreesAlps(TileIndex tile)
{
int k = GetTileZ(tile) - _opt.snow_line + TILE_HEIGHT;
int k = GetTileZ(tile) - GetSnowLine() + TILE_HEIGHT;
if (k < 0) {
if (GetTreeGround(tile) != TREE_GROUND_SNOW_DESERT) return;