cpp/openttd-patchpack/source Files · src/yapf/yapf_costbase.hpp

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r7643:9ec38df7caf3 1.2 KiB text/x-c++hdr Show Annotation Show as Raw Download as Raw

rubidium

(svn r11174) -Codechange: add possibility to show the bounding boxes of sprites using CTRL-B so one can get a better understanding of the used bounding boxes to fix the glitches that still exist. Patch by frosch.
Note that this is not completely glitch free, bounding boxes sometimes aren't removed properly. This is due to the fact that the bounding boxes sometimes are larger than the sprite, which causes a smaller part than the bounding box to be redrawn. This is NOT a bug, but a known implementation limit as we do not want to slow down normal games so the debug graphics are always 100% correct.

/* $Id$ */

#ifndef  YAPF_COSTBASE_HPP
#define  YAPF_COSTBASE_HPP

struct CYapfCostBase {
	static const TrackdirBits   c_upwards_slopes[16];

	FORCEINLINE static bool stSlopeCost(TileIndex tile, Trackdir td)
	{
		if (IsDiagonalTrackdir(td)) {
			if (IsBridgeTile(tile)) {
				// it is bridge ramp, check if we are entering the bridge
				if (GetBridgeRampDirection(tile) != TrackdirToExitdir(td)) return false; // no, we are living it, no penalty
				// we are entering the bridge
				// if the tile slope is downwards, then bridge ramp has not upward slope
				uint tile_slope = GetTileSlope(tile, NULL) & 0x0F;
				if ((c_upwards_slopes[tile_slope] & TrackdirToTrackdirBits(ReverseTrackdir(td))) != 0) return false; // tile under ramp goes down, no penalty
				// tile under ramp isn't going down, so ramp must go up
				return true;
			} else {
				// not bridge ramp
				if (IsTunnelTile(tile)) return false; // tunnel entry/exit doesn't slope
				uint tile_slope = GetTileSlope(tile, NULL) & 0x0F;
				if ((c_upwards_slopes[tile_slope] & TrackdirToTrackdirBits(td)) != 0) return true; // slopes uphill => apply penalty
			}
		}
		return false;
	}
};

struct CostRailSettings {
	// look-ahead signal penalty
};


#endif /* YAPF_COSTBASE_HPP */