slope.h
author Darkvater
Thu, 30 Nov 2006 22:23:11 +0000
changeset 5197 2b3a2494b2e1
parent 4666 172a0cdf28a6
permissions -rw-r--r--
(svn r7312) -Fix: When loading a game from a dedicated server the local player global variable was
wrongly set to 0. In theory this allowed a dedicated server to also play. I see no
history for this bug, but it has been there since the introduction of the dedicated
server probably. Thanks peter1138 for bringing it to my attention and thanks myself
for rewriting the code so this bug could surface ;p
/* $Id$ */

#ifndef SLOPE_H
#define SLOPE_H

typedef enum Slope {
	SLOPE_FLAT     = 0x00,
	SLOPE_W        = 0x01,
	SLOPE_S        = 0x02,
	SLOPE_E        = 0x04,
	SLOPE_N        = 0x08,
	SLOPE_STEEP    = 0x10,
	SLOPE_NW       = SLOPE_N | SLOPE_W,
	SLOPE_SW       = SLOPE_S | SLOPE_W,
	SLOPE_SE       = SLOPE_S | SLOPE_E,
	SLOPE_NE       = SLOPE_N | SLOPE_E,
	SLOPE_EW       = SLOPE_E | SLOPE_W,
	SLOPE_NS       = SLOPE_N | SLOPE_S,
	SLOPE_ELEVATED = SLOPE_N | SLOPE_E | SLOPE_S | SLOPE_W,
	SLOPE_NWS      = SLOPE_N | SLOPE_W | SLOPE_S,
	SLOPE_WSE      = SLOPE_W | SLOPE_S | SLOPE_E,
	SLOPE_SEN      = SLOPE_S | SLOPE_E | SLOPE_N,
	SLOPE_ENW      = SLOPE_E | SLOPE_N | SLOPE_W,
	SLOPE_STEEP_W  = SLOPE_STEEP | SLOPE_NWS,
	SLOPE_STEEP_S  = SLOPE_STEEP | SLOPE_WSE,
	SLOPE_STEEP_E  = SLOPE_STEEP | SLOPE_SEN,
	SLOPE_STEEP_N  = SLOPE_STEEP | SLOPE_ENW
} Slope;

static inline bool IsSteepSlope(Slope s)
{
	return (s & SLOPE_STEEP) != 0;
}

static inline Slope ComplementSlope(Slope s)
{
	assert(!IsSteepSlope(s));
	return (Slope)(0xF ^ s);
}

#endif /* SLOPE_H */