cpp/openttd-patchpack/source Files · tile.c

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Location: cpp/openttd-patchpack/source/tile.c

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miham

(svn r7216) WebTranslator2 update to 2006-11-19 22:30:04
american - 5 fixed by WhiteRabbit (5)
brazilian_portuguese - 10 fixed by tucalipe (10)
catalan - 9 fixed by arnaullv (9)
czech - 5 fixed by Hadez (5)
danish - 3 fixed, 2 changed by ThomasA (5)
dutch - 3 fixed by habell (3)
finnish - 7 fixed, 3 changed by kerba (10)
french - 5 fixed by glx (2), belugas (3)
galician - 7 fixed, 1 changed by Condex (8)
german - 4 fixed by Neonox (4)
italian - 3 fixed by sidew (3)
polish - 6 fixed, 20 changed by meush (26)
portuguese - 5 fixed by izhirahider (5)
romanian - 9 fixed, 2 changed by kneekoo (11)
spanish - 5 fixed, 1 changed by eusebio (6)
turkish - 2 fixed by jnmbk (2)
ukrainian - 6 fixed by znikoz (6)

/* $Id$ */

#include "stdafx.h"
#include "tile.h"

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

	r = SLOPE_FLAT;
	if ((a -= min) != 0) r += (--a << 4) + SLOPE_N;
	if ((c -= min) != 0) r += (--c << 4) + SLOPE_E;
	if ((d -= min) != 0) r += (--d << 4) + SLOPE_S;
	if ((b -= min) != 0) r += (--b << 4) + SLOPE_W;

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

	return r;
}

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


uint GetTileMaxZ(TileIndex t)
{
	uint max;
	uint h;

	h = TileHeight(t);
	max = h;
	h = TileHeight(t + TileDiffXY(1, 0));
	if (h > max) max = h;
	h = TileHeight(t + TileDiffXY(0, 1));
	if (h > max) max = h;
	h = TileHeight(t + TileDiffXY(1, 1));
	if (h > max) max = h;
	return max * 8;
}