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/*
* File: losparam.h
* Summary: Parameters for the LOS algorithm
*/
#include "AppHdr.h"
REVISION("$Rev$");
#include "losparam.h"
#include "cloud.h"
#include "externs.h"
#include "los.h"
#include "stuff.h"
#include "terrain.h"
/* los_param_trans */
los_param_trans::los_param_trans(const coord_def& c)
: center(c)
{
}
coord_def los_param_trans::trans(const coord_def& p) const
{
return (p + center);
}
bool los_param_trans::los_bounds(const coord_def& p) const
{
return (map_bounds(trans(p)) && p.abs() <= get_los_radius_squared());
}
/* los_param_permissive */
los_param_permissive::los_param_permissive(const coord_def& c)
: los_param_trans(c)
{
}
unsigned los_param_permissive::appearance(const coord_def& p) const
{
return env.grid(trans(p));
}
opacity_type los_param_permissive::opacity(const coord_def& p) const
{
return OPC_CLEAR;
}
/* los_param_nocloud */
los_param_nocloud::los_param_nocloud(const coord_def& c)
: los_param_trans(c)
{
}
dungeon_feature_type los_param_nocloud::feature(const coord_def& p) const
{
return env.grid(trans(p));
}
unsigned los_param_nocloud::appearance(const coord_def& p) const
{
return grid_appearance(trans(p));
}
opacity_type los_param_nocloud::opacity(const coord_def& p) const
{
dungeon_feature_type f = feature(p);
if (grid_is_opaque(f))
return OPC_OPAQUE;
else
return OPC_CLEAR;
}
/* los_param_base */
los_param_base::los_param_base(const coord_def& c)
: los_param_nocloud(c)
{
}
unsigned short los_param_base::cloud_idx(const coord_def& p) const
{
return env.cgrid(trans(p));
}
opacity_type los_param_base::opacity(const coord_def& p) const
{
dungeon_feature_type f = feature(p);
if (grid_is_opaque(f))
return OPC_OPAQUE;
else if (is_opaque_cloud(cloud_idx(p)))
return OPC_HALF;
else if (f == DNGN_TREES)
return OPC_HALF;
else
return OPC_CLEAR;
}
/* los_param_solid */
los_param_solid::los_param_solid(const coord_def& c)
: los_param_base(c)
{
}
opacity_type los_param_solid::opacity(const coord_def& p) const
{
dungeon_feature_type f = feature(p);
if (grid_is_solid(f))
return OPC_OPAQUE;
else if (is_opaque_cloud(cloud_idx(p)))
return OPC_HALF;
else
return OPC_CLEAR;
}
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