g_vis.h

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/*
Copyright (C) 2002-2020 UFO: Alien Invasion.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
#pragma once

#include "g_local.h"

/* A bit mask. One bit for each affected team. */
typedef unsigned int teammask_t;
/* Bitmask for all teams */
#define TEAM_ALL        0xFFFFFFFF

/* Visibility changes -- see G_DoTestVis */
#define VIS_APPEAR  1

#define VIS_PERISH  2

#define VIS_STOP    4

/* Visibility state -- see G_TestVis */
#define VS_CHANGE   1

#define VS_YES      2

/* A bit mask. Modifiers for the way visibility check are performed. */
typedef unsigned int vischeckflags_t;
/* possible values are: */
#define VT_PERISHCHK    1

#define VT_NOFRUSTUM    2

#define VT_NEW          4

#define ACTOR_VIS_100   1.0f
#define ACTOR_VIS_50    0.5f
#define ACTOR_VIS_10    0.1f
#define ACTOR_VIS_0     0.0f

bool G_FrustumVis(const Edict* from, const vec3_t point);
bool G_SmokeVis (const vec3_t from, const Edict* check);
float G_ActorVis(const Edict* ent, const Edict* check, bool full);
void G_VisFlagsClear(int team);
void G_VisFlagsAdd(Edict& ent, teammask_t teamMask);
void G_VisFlagsSwap(Edict& ent, teammask_t teamMask);
void G_VisFlagsReset(Edict& ent);
void G_VisMakeEverythingVisible(void);
void G_CheckVis(Edict* check, const vischeckflags_t visFlags = VT_PERISHCHK);
void G_CheckVisPlayer(Player& player, const vischeckflags_t visFlags);
int G_CheckVisTeamAll(const int team, const vischeckflags_t visFlags, const Edict* ent);
int G_TestVis(const int team, Edict* check, const vischeckflags_t flags);
bool G_Vis(const int team, const Edict* from, const Edict* check, const vischeckflags_t flags);
int G_VisCheckDist(const Edict* const ent);