| author | bjarni |
| Wed, 04 Oct 2006 19:15:25 +0000 | |
| changeset 4728 | d4426f6c6191 |
| parent 4666 | 172a0cdf28a6 |
| permissions | -rw-r--r-- |
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(svn r4541) Add a type for slopes and replace many magic numbers by the appropriate enums
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/* $Id$ */ |
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#ifndef SLOPE_H |
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#define SLOPE_H |
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typedef enum Slope {
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SLOPE_FLAT = 0x00, |
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SLOPE_W = 0x01, |
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SLOPE_S = 0x02, |
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SLOPE_E = 0x04, |
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SLOPE_N = 0x08, |
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SLOPE_STEEP = 0x10, |
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SLOPE_NW = SLOPE_N | SLOPE_W, |
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SLOPE_SW = SLOPE_S | SLOPE_W, |
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SLOPE_SE = SLOPE_S | SLOPE_E, |
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SLOPE_NE = SLOPE_N | SLOPE_E, |
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SLOPE_EW = SLOPE_E | SLOPE_W, |
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SLOPE_NS = SLOPE_N | SLOPE_S, |
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SLOPE_ELEVATED = SLOPE_N | SLOPE_E | SLOPE_S | SLOPE_W, |
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SLOPE_NWS = SLOPE_N | SLOPE_W | SLOPE_S, |
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SLOPE_WSE = SLOPE_W | SLOPE_S | SLOPE_E, |
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SLOPE_SEN = SLOPE_S | SLOPE_E | SLOPE_N, |
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SLOPE_ENW = SLOPE_E | SLOPE_N | SLOPE_W, |
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SLOPE_STEEP_W = SLOPE_STEEP | SLOPE_NWS, |
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SLOPE_STEEP_S = SLOPE_STEEP | SLOPE_WSE, |
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SLOPE_STEEP_E = SLOPE_STEEP | SLOPE_SEN, |
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SLOPE_STEEP_N = SLOPE_STEEP | SLOPE_ENW |
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} Slope; |
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static inline bool IsSteepSlope(Slope s) |
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{
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return (s & SLOPE_STEEP) != 0; |
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} |
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static inline Slope ComplementSlope(Slope s) |
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{
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assert(!IsSteepSlope(s)); |
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return (Slope)(0xF ^ s); |
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} |
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#endif /* SLOPE_H */ |