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(svn r2657) -Codechange: The available railtypes per player are now a bitmask, so

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that railtypes do not be in ascending order of appearance. Allows easier
implementation or more railtypes
This commit is contained in:
celestar
2005-07-20 22:02:58 +00:00
parent 030c37160d
commit 18a93cca3d
10 changed files with 91 additions and 37 deletions
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42
player.h
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@@ -2,6 +2,8 @@
#define PLAYER_H
#include "aystar.h"
#include "engine.h"
#include "rail.h"
typedef struct PlayerEconomyEntry {
int32 income;
@@ -157,7 +159,7 @@ typedef struct Player {
byte player_color;
byte player_money_fraction;
byte max_railtype;
byte avail_railtypes;
byte block_preview;
PlayerID index;
@@ -203,6 +205,44 @@ static inline Player* GetPlayer(uint i)
return &_players[i];
}
/** Returns the number of rail types the player can build
* @param *p Player in question
*/
static inline int GetNumRailtypes(Player *p)
{
int num = 0;
int i;
for (i = 0; i < (int)sizeof(p->avail_railtypes) * 8; i++)
if (HASBIT(p->avail_railtypes, i)) num++;
assert(num <= RAILTYPE_END);
return num;
}
byte GetPlayerRailtypes(int p);
/** Finds out if a Player has a certain railtype available
*/
static inline bool HasRailtypeAvail(Player *p, RailType Railtype)
{
return HASBIT(p->avail_railtypes, Railtype);
}
/** Returns the "best" railtype a player can build.
* As the AI doesn't know what the BEST one is, we
* have our own priority list here. When adding
* new railtypes, modify this function
* @param p the player "in action"
* @return The "best" railtype a player has available
*/
static inline byte GetBestRailtype(Player *p)
{
if (HasRailtypeAvail(p, RAILTYPE_MAGLEV)) return RAILTYPE_MAGLEV;
if (HasRailtypeAvail(p, RAILTYPE_MONO)) return RAILTYPE_MONO;
return RAILTYPE_RAIL;
}
#define IS_HUMAN_PLAYER(p) (!GetPlayer((byte)(p))->is_ai)
#define IS_INTERACTIVE_PLAYER(p) (((byte)p) == _local_player)