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(svn r12098) -Fix: make snow appear on rail tiles dependant on track height, not on height of the lowest part of the tile

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smatz 2008-02-10 11:35:05 +00:00
parent efe831934a
commit 9deab65bae
2 changed files with 56 additions and 4 deletions
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59
src/rail_cmd.cpp
View File

@ -1698,7 +1698,8 @@ static void DrawTrackBits(TileInfo* ti, TrackBits track)
pal = PAL_NONE; pal = PAL_NONE;
switch (rgt) { switch (rgt) {
case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break; case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break; case RAIL_GROUND_ICE_DESERT:
case RAIL_GROUND_HALF_SNOW: image += rti->snow_offset; break; // higher part has snow in this case too
default: break; default: break;
} }
DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner])); DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner]));
@ -1934,12 +1935,62 @@ static void TileLoop_Track(TileIndex tile)
} }
switch (_opt.landscape) { switch (_opt.landscape) {
case LT_ARCTIC: case LT_ARCTIC: {
if (GetTileZ(tile) > GetSnowLine()) { uint z;
new_ground = RAIL_GROUND_ICE_DESERT; Slope slope = GetTileSlope(tile, &z);
bool half = false;
/* for non-flat track, use lower part of track
* in other cases, use the highest part with track */
if (IsPlainRailTile(tile)) {
TrackBits track = GetTrackBits(tile);
Foundation f = GetRailFoundation(slope, track);
switch (f) {
case FOUNDATION_NONE:
/* no foundation - is the track on the upper side of three corners raised tile? */
if (IsSlopeWithThreeCornersRaised(slope)) z += TILE_HEIGHT;
break;
case FOUNDATION_INCLINED_X:
case FOUNDATION_INCLINED_Y:
/* sloped track - is it on a steep slope? */
if (IsSteepSlope(slope)) z += TILE_HEIGHT;
break;
case FOUNDATION_STEEP_LOWER:
/* only lower part of steep slope */
z += TILE_HEIGHT;
break;
default:
/* if it is a steep slope, then there is a track on higher part */
if (IsSteepSlope(slope)) z += TILE_HEIGHT;
z += TILE_HEIGHT;
break;
}
half = IsInsideMM(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1);
} else {
/* is the depot on a non-flat tile? */
if (slope != SLOPE_FLAT) z += TILE_HEIGHT;
}
/* 'z' is now the lowest part of the highest track bit -
* for sloped track, it is 'z' of lower part
* for two track bits, it is 'z' of higher track bit
* For non-continuous foundations (and STEEP_BOTH), 'half' is set */
if (z > GetSnowLine()) {
if (half && z - GetSnowLine() == TILE_HEIGHT) {
/* track on non-continuous foundation, lower part is not under snow */
new_ground = RAIL_GROUND_HALF_SNOW;
} else {
new_ground = RAIL_GROUND_ICE_DESERT;
}
goto set_ground; goto set_ground;
} }
break; break;
}
case LT_TROPIC: case LT_TROPIC:
if (GetTropicZone(tile) == TROPICZONE_DESERT) { if (GetTropicZone(tile) == TROPICZONE_DESERT) {

1
src/rail_map.h
View File

@ -409,6 +409,7 @@ enum RailGroundType {
RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side
RAIL_GROUND_ICE_DESERT = 12, ///< Icy or sandy RAIL_GROUND_ICE_DESERT = 12, ///< Icy or sandy
RAIL_GROUND_WATER = 13, ///< Grass with a fence and shore or water on the free halftile RAIL_GROUND_WATER = 13, ///< Grass with a fence and shore or water on the free halftile
RAIL_GROUND_HALF_SNOW = 14, ///< Snow only on higher part of slope (steep or one corner raised)
}; };
static inline void SetRailGroundType(TileIndex t, RailGroundType rgt) static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)