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

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

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miham

(svn r8084) [Translations] Added nynorsk translation (pollux), renamed norwegian to norwegian bokmal, moved nynorsk to finished languages, and updated project files.
Strings pending to nynorsk will be preserved if they are differ from the current translation

/* $Id$ */

#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 SLOPE_FLAT;
	}

	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 (Slope)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;
}