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

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

r7581:0085036e989e 1.4 KiB text/x-c Show Annotation Show as Raw Download as Raw

truelight

(svn r11106) -Add: added .tar support; you can pack all files in your data/ dir in how ever many .tar files you like, keeping the dir-structure equal to the unpacked version, and OpenTTD can handle them just like the files were unpacked
-Note: useful for GRF-packs and 32bpp PNGs. Don't forget to keep the dir-structure alive for 32bpp PNGs!
-Note: file-loading-order: search-paths, .tar-files in the order found on disk (can be anything at all, don't depend on it.. use 'openttd -d1' to see which order they are added)

/* $Id$ */

/** @file tile.cpp */

#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)
{
	if (TileX(tile) == MapMaxX() || TileY(tile) == MapMaxY()) return 0;

	uint h = TileHeight(tile);
	h = min(h, TileHeight(tile + TileDiffXY(1, 0)));
	h = min(h, TileHeight(tile + TileDiffXY(0, 1)));
	h = min(h, TileHeight(tile + TileDiffXY(1, 1)));

	return h * TILE_HEIGHT;
}


uint GetTileMaxZ(TileIndex t)
{
	if (TileX(t) == MapMaxX() || TileY(t) == MapMaxY()) return 0;

	uint h = TileHeight(t);
	h = max(h, TileHeight(t + TileDiffXY(1, 0)));
	h = max(h, TileHeight(t + TileDiffXY(0, 1)));
	h = max(h, TileHeight(t + TileDiffXY(1, 1)));

	return h * TILE_HEIGHT;
}