tile.c
author Darkvater
Sat, 28 May 2005 16:59:51 +0000
changeset 1866 87ae212e7eda
parent 1854 b9a23864983c
child 1981 3c9c682f1212
permissions -rw-r--r--
(svn r2372) - Fix (console): update the example scripts in the scripts/ directory to reflect the new console functionality
- Fix (console): any line starting with a '#' is a comment so ignore it
- Fix (console): The special variables whose value can only be set by a custom process should, also print out their newly set value there, instead of relying on the default printout which is slightly confusing. Eg after you change the value it still printed out 'current value for...' instead of 'XXX changed to...'
#include "stdafx.h"
#include "tile.h"

void SetMapExtraBits(TileIndex tile, byte bits)
{
	assert(tile < MapSize());
	SB(_map_extra_bits[tile >> 2], (tile & 3) * 2, 2, bits & 3);
}

uint GetMapExtraBits(TileIndex tile)
{
	assert(tile < MapSize());
	return GB(_map_extra_bits[tile >> 2], (tile & 3) * 2, 2);
}


uint GetTileSlope(TileIndex tile, uint *h)
{
	uint a;
	uint b;
	uint c;
	uint d;
	uint min;
	uint r;

	assert(tile < MapSize());

	if (TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) {
		if (h != NULL) *h = 0;
		return 0;
	}

	min = a = TileHeight(tile);
	b = TileHeight(tile + TILE_XY(1,0));
	if (min >= b) min = b;
	c = TileHeight(tile + TILE_XY(0,1));
	if (min >= c) min = c;
	d = TileHeight(tile + TILE_XY(1,1));
	if (min >= d) min = d;

	r = 0;
	if ((a -= min) != 0) { r += (--a << 4) + 8; }
	if ((c -= min) != 0) { r += (--c << 4) + 4; }
	if ((d -= min) != 0) { r += (--d << 4) + 2; }
	if ((b -= min) != 0) { r += (--b << 4) + 1; }

	if (h != NULL)
		*h = min * 8;

	return r;
}

uint GetTileZ(TileIndex tile)
{
	uint h;
	GetTileSlope(tile, &h);
	return h;
}