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/*
* File: losparam.h
* Summary: Parameters for the LOS algorithm
*/
#include "AppHdr.h"
#include "losparam.h"
#include "cloud.h"
#include "env.h"
#include "externs.h"
#include "mon-util.h"
#include "terrain.h"
opacity_type opacity_default::operator()(const coord_def& p) const
{
// Secret doors in translucent walls shouldn't block LOS,
// hence grid_appearance.
dungeon_feature_type f = grid_appearance(p);
if (feat_is_opaque(f))
return OPC_OPAQUE;
else if (is_opaque_cloud(env.cgrid(p)))
return OPC_HALF;
else if (f == DNGN_TREE)
return OPC_HALF;
else if (monster_at(p) && monster_at(p)->type == MONS_BUSH)
return OPC_HALF;
else
return OPC_CLEAR;
}
opacity_type opacity_fullyopaque::operator()(const coord_def& p) const
{
if (feat_is_opaque(env.grid(p)))
return OPC_OPAQUE;
else
return OPC_CLEAR;
}
opacity_type opacity_no_trans::operator()(const coord_def& p) const
{
opacity_type base = opc_default(p);
dungeon_feature_type f = env.grid(p);
if (feat_is_opaque(f) || feat_is_wall(f) || f == DNGN_TREE)
return OPC_OPAQUE;
else
return base;
}
static bool mons_block_immob(const monsters* mons)
{
if (mons == NULL)
return false;
switch (mons->id())
{
case MONS_BUSH:
case MONS_PLANT:
case MONS_OKLOB_PLANT:
case MONS_FUNGUS:
return true;
default:
return false;
}
}
opacity_type opacity_immob::operator()(const coord_def& p) const
{
opacity_type base = opc_no_trans(p);
if (mons_block_immob(monster_at(p)))
return OPC_OPAQUE;
else
return base;
}
// Make anything solid block in addition to normal LOS.
// That's just granite statues in addition to opacity_no_trans.
opacity_type opacity_solid::operator()(const coord_def& p) const
{
dungeon_feature_type f = env.grid(p);
if (feat_is_solid(f))
return OPC_OPAQUE;
else if (is_opaque_cloud(env.cgrid(p)))
return OPC_HALF;
else if (f == DNGN_TREE)
return OPC_HALF;
else if (monster_at(p) && monster_at(p)->type == MONS_BUSH)
return OPC_HALF;
else
return OPC_CLEAR;
}
opacity_type opacity_monmove::operator()(const coord_def& p) const
{
dungeon_feature_type feat = env.grid(p);
if (feat < DNGN_MINMOVE || !mon.can_pass_through_feat(feat))
return (OPC_OPAQUE);
else
return (OPC_CLEAR);
}
opacity_type opacity_no_actor::operator()(const coord_def& p) const
{
if (feat_is_solid(env.grid(p)) || actor_at(p))
return (OPC_OPAQUE);
else
return (OPC_CLEAR);
}
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