fc32e20195
Fixes a bug where you could terraform a tunnel (fixed by r3228, but reverted that one) Fixes a bug introduced by r3228 which allowed steep rail tiles resulting in ... unwanted effects such as display artifacts. That means the terraform feature should not work as intended; it also uses _valid_tileh_slopes to determine valid configurations instead of hand-brewn stuff. TODO: _terraform_err_tile and similar TileIndices should have INVALID_TILE as "unused", not 0. (0 is a valid tile).
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
/* $Id$ */
|
|
|
|
#include "stdafx.h"
|
|
#include "tile.h"
|
|
|
|
void SetMapExtraBits(TileIndex tile, byte bits)
|
|
{
|
|
assert(tile < MapSize());
|
|
SB(_m[tile].extra, 0, 2, bits & 3);
|
|
}
|
|
|
|
uint GetMapExtraBits(TileIndex tile)
|
|
{
|
|
assert(tile < MapSize());
|
|
return GB(_m[tile].extra, 0, 2);
|
|
}
|
|
|
|
/** Converts the heights of 4 corners into a tileh, and returns the minimum height of the tile
|
|
* @param n,w,e,s the four corners
|
|
* @param h uint pointer to write the height to
|
|
* @return the tileh
|
|
*/
|
|
uint GetTileh(uint n, uint w, uint e, uint s, uint *h)
|
|
{
|
|
uint min = n;
|
|
uint r;
|
|
|
|
if (min >= w) min = w;
|
|
if (min >= e) min = e;
|
|
if (min >= s) min = s;
|
|
|
|
r = 0;
|
|
if ((n -= min) != 0) r += (--n << 4) + 8;
|
|
if ((e -= min) != 0) r += (--e << 4) + 4;
|
|
if ((s -= min) != 0) r += (--s << 4) + 2;
|
|
if ((w -= min) != 0) r += (--w << 4) + 1;
|
|
|
|
if (h != NULL) *h = min * 8;
|
|
|
|
return r;
|
|
}
|
|
|
|
uint GetTileSlope(TileIndex tile, uint *h)
|
|
{
|
|
uint a;
|
|
uint b;
|
|
uint c;
|
|
uint d;
|
|
|
|
assert(tile < MapSize());
|
|
|
|
if (TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) {
|
|
if (h != NULL) *h = 0;
|
|
return 0;
|
|
}
|
|
|
|
a = TileHeight(tile);
|
|
b = TileHeight(tile + TileDiffXY(1, 0));
|
|
c = TileHeight(tile + TileDiffXY(0, 1));
|
|
d = TileHeight(tile + TileDiffXY(1, 1));
|
|
|
|
return GetTileh(a, b, c, d, h);
|
|
}
|
|
|
|
uint GetTileZ(TileIndex tile)
|
|
{
|
|
uint h;
|
|
GetTileSlope(tile, &h);
|
|
return h;
|
|
}
|