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tile_map.cpp
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tile_map.cpp
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#include "tile_map.hpp"
using namespace std;
//------------------------------------------------------------------------------
void
TileMap::loadFromFile(string map_file_path, boost::function<TileSet*(string)> tileset_factory)
{
this->deleteData();
ifstream map_file(map_file_path.c_str());
if(map_file.is_open())
{
string tiles_file;
getline(map_file, tiles_file); if(not map_file.good()) throw ERROR("parse", "Can't read from map file: '"+map_file_path+"'");
//this->readTilesFile(tiles_file);
this->tiles = tileset_factory(tiles_file);
assert(tiles);
string line;
getline(map_file, line); if(not map_file.good()) throw ERROR("parse", "Can't read from map file: '"+map_file_path+"'");
this->size.x = boost::lexical_cast<int>(line);
getline(map_file, line); if(not map_file.good()) throw ERROR("parse", "Can't read from map file: '"+map_file_path+"'");
this->size.y = boost::lexical_cast<int>(line);
if(this->size.x <= 0 or this->size.y <= 0)
throw ERROR("parse", "Invalid width/height in '"+map_file_path+"'.");
getline(map_file, line); if(not map_file.good()) throw ERROR("parse", "Can't read from map file: '"+map_file_path+"'");
this->tile_size.x = boost::lexical_cast<int>(line);
getline(map_file, line); if(not map_file.good()) throw ERROR("parse", "Can't read from map file: '"+map_file_path+"'");
this->tile_size.y = boost::lexical_cast<int>(line);
if(this->tile_size.x <= 0 or this->tile_size.y <= 0)
throw ERROR("parse", "Invalid tile-width/height in '"+map_file_path+"'.");
data = new Tile* [size.x*size.y];
setNULL(data, size.x*size.y);
char c=' '; int i=0;
while(map_file.good() and i < size.x*size.y)
{
map_file.get(c);
size_t code = c;
if(c != '\n')
{
if(c == 'S') /// startpoint
{
this->start_pos.x = i % this->size.x;
this->start_pos.y = i / this->size.x;
}
else if(c == '1') /// enemy
{
/// TODO: implement that ;)
}
else if(this->tiles->hasTile(code))
this->data[i] = this->tiles->getTile(code);
else
this->data[i] = NULL;
++i;
}
}
map_file.close();
cout << "successfully loaded " << map_file_path << endl;
}
else
throw ERROR("load","Can't read map file at all: '"+map_file_path+"'");
};
//------------------------------------------------------------------------------
TileMap::~TileMap()
{
this->deleteData();
};
//------------------------------------------------------------------------------
void
TileMap::deleteData()
{
if(this->data)
delete[] this->data;
this->data = NULL;
}
//------------------------------------------------------------------------------
MapCoords
TileMap::toMapCoords(ScreenCoords v)
{
MapCoords result(0,0);
for(int dim=1;dim<3;++dim)
{
if (v[dim] >= size[dim]*tile_size[dim])
result[dim] = size[dim]-1;
else if (v[dim] >= 0)
result[dim] = floor(v[dim] / tile_size[dim]);
}
assert(result.x >= 0 and result.x < size.x);
assert(result.y >= 0 and result.y < size.y);
return result;
};
//------------------------------------------------------------------------------
ScreenCoords
TileMap::toScreenCoords(MapCoords v)
{
ScreenCoords result(0,0);
for(int dim=1;dim<3;++dim)
{
if (v[dim]>size[dim])
result[dim] = size[dim]*tile_size[dim];
else if (v[dim] > 0)
result[dim] = v[dim] *tile_size[dim];
}
return result;
};
//------------------------------------------------------------------------------
bool
TileMap::collides(CBox<Vect::T> box, uint32_t flag)
{
MapCoords topleft = this->toMapCoords(box.center - box.extend);
MapCoords bottomright = this->toMapCoords(box.center + box.extend);
MapCoords xy(0,0);
for(xy.y = topleft.y; xy.y <= bottomright.y; ++xy.y)
for(xy.x = topleft.x; xy.x <= bottomright.x; ++xy.x)
if(this->collides(xy, flag)) return true;
return false;
};
//------------------------------------------------------------------------------
bool
TileMap::collides(CBoxEdge<Vect::T> edge, uint32_t flag)
{
return this->collides(CBox<Vect::T>(edge), flag);
};
//------------------------------------------------------------------------------
bool
TileMap::collides(ScreenCoords point, uint32_t flag)
{
return this->collides(this->toMapCoords(point), flag);
};
//------------------------------------------------------------------------------
bool
TileMap::collides(MapCoords point, uint32_t flag)
{
Tile* t = this->getData(point);
return (t and t->flags & flag)
or point.x < 0
or point.y < 0
or point.x >= this->size.x
or point.y >= this->size.y;
};
//------------------------------------------------------------------------------
Vect::T
TileMap::getDistToNearestBlock(CBoxEdge<Vect::T>& e, Vect::T maxdist, int dim, uint32_t flag)
{
assert(valid_dim(dim));
assert( (dim==1 and e.p1.y <= e.p2.y and e.p1.x == e.p2.x)
or (dim==2 and e.p1.x <= e.p2.x and e.p1.y == e.p2.y));
assert(maxdist != 0);
if(this->collides(e, flag)) return 0;
ScreenCoords tmp = e.p2;
tmp[dim] += maxdist;
MapCoords start = this->toMapCoords(e.p1),
max = this->toMapCoords(tmp), /// max is automatically bounded by map size
pos = start;
/// don't check first one, as there is certainly no collision (see a few lines up ;)
pos[dim] += sgn(maxdist);
for(; sgn(pos[dim] - max[dim]) != sgn(maxdist); pos[dim] += sgn(maxdist))
for(pos[3-dim] = start[3-dim]; pos[3-dim] <= max[3-dim]; ++pos[3-dim])
{
if(this->collides(pos, flag))
{
if(maxdist >= 0)
return (pos[dim]-start[dim])*this->tile_size[dim] - e.p1[dim] + (start[dim] )*tile_size[dim];
else
return (pos[dim]-start[dim])*this->tile_size[dim] - e.p1[dim] + (start[dim]+1)*tile_size[dim];
}
}
return maxdist*10; ///< "no" collision
};
//------------------------------------------------------------------------------