source/libr2c2/terrain.cpp

   1 #include <msp/geometry/box.h>
   2 #include <msp/geometry/transformedshape.h>
   3 #include "layout.h"
   4 #include "terrain.h"
   5 #include "terraintype.h"
   6
   7 using namespace std;
   8 using namespace Msp;
   9
  10 namespace R2C2 {
  11
  12 Terrain::Terrain(Layout &l, const TerrainType &t):
  13         Object(l),
  14         type(t),
  15         width(0),
  16         height(0)
  17 {
  18         set_size(1, 1);
  19
  20         layout.add(*this);
  21 }
  22
  23 Terrain::~Terrain()
  24 {
  25         layout.remove(*this);
  26 }
  27
  28 Terrain *Terrain::clone(Layout *to_layout) const
  29 {
  30         Terrain *terrain = new Terrain((to_layout ? *to_layout : layout), type);
  31         terrain->set_size(width, height);
  32         for(unsigned i=0; i<tiles.size(); ++i)
  33                 terrain->tiles[i] = tiles[i];
  34         return terrain;
  35 }
  36
  37 void Terrain::set_position(const Vector &p)
  38 {
  39         position = p;
  40         signal_moved.emit();
  41 }
  42
  43 void Terrain::set_rotation(const Angle &r)
  44 {
  45         rotation = r;
  46         signal_moved.emit();
  47 }
  48
  49 void Terrain::set_size(unsigned w, unsigned h)
  50 {
  51         if(!w || !h)
  52                 throw invalid_argument("Terrain::set_size");
  53
  54         vector<Tile> new_tiles(w*h);
  55         for(unsigned y=0; (y<h && y<height); ++y)
  56                 for(unsigned x=0; (x<w && x<width); ++x)
  57                         new_tiles[x+y*w] = tiles[x+y*width];
  58
  59         width = w;
  60         height = h;
  61         swap(tiles, new_tiles);
  62
  63         delete shape;
  64         float ts = type.get_tile_size();
  65         Vector dim(width*ts, height*ts, ts);
  66         shape = new Geometry::TransformedShape<float, 3>(
  67                 Geometry::Box<float>(dim),
  68                 Transform::translation(dim/2.0f));
  69
  70         signal_size_changed.emit(width, height);
  71 }
  72
  73 const Terrain::Tile &Terrain::get_tile(unsigned x, unsigned y) const
  74 {
  75         if(x>=width || y>=height)
  76                 throw out_of_range("Terrain::get_tile");
  77         return tiles[x+y*width];
  78 }
  79
  80 void Terrain::set_node_elevation(const NodeCoordinates &c, float elev, bool joined)
  81 {
  82         if(c.x>=width || c.y>=height || c.i>=4)
  83                 throw out_of_range("Terrain::set_node_elevation");
  84
  85         float eg = type.get_elevation_granularity();
  86         elev = int(elev/eg+0.5)*eg;
  87
  88         if(joined)
  89         {
  90                 float ref = tiles[c.x+c.y*width].nodes[c.i].elevation;
  91                 for(unsigned i=0; i<4; ++i)
  92                 {
  93                         unsigned x = c.x+c.i%2-i%2;
  94                         unsigned y = c.y+c.i/2-i/2;
  95                         if(x<width && y<height)
  96                         {
  97                                 Tile &tile = tiles[x+y*width];
  98                                 if(tile.nodes[i].elevation==ref)
  99                                 {
 100                                         tile.nodes[i].elevation = elev;
 101                                         signal_tile_changed.emit(x, y);
 102                                 }
 103                         }
 104                 }
 105         }
 106         else
 107         {
 108                 tiles[c.x+c.y*width].nodes[c.i].elevation = elev;
 109                 signal_tile_changed.emit(c.x, c.y);
 110         }
 111 }
 112
 113 float Terrain::get_node_elevation(const NodeCoordinates &c) const
 114 {
 115         if(c.x>=width || c.y>=height || c.i>=4)
 116                 throw out_of_range("Terrain::get_node_elevation");
 117
 118         return tiles[c.x+c.y*width].nodes[c.i].elevation;
 119 }
 120
 121 Vector Terrain::get_node_position(const NodeCoordinates &c) const
 122 {
 123         if(c.x>=width || c.y>=height || c.i>=4)
 124                 throw out_of_range("Terrain::get_node_position");
 125
 126         const Tile &tile = tiles[c.x+c.y*width];
 127         float tile_size = type.get_tile_size();
 128         Transform trans = Transform::translation(position)*
 129                 Transform::rotation(rotation, Vector(0, 0, 1));
 130         return trans.transform(Vector((c.x+c.i%2)*tile_size, (c.y+c.i/2)*tile_size, tile.nodes[c.i].elevation));
 131 }
 132
 133 Terrain::NodeCoordinates Terrain::get_closest_node(const Ray &ray) const
 134 {
 135         NodeCoordinates coords;
 136         float closest_dist = -1;
 137         for(unsigned y=0; y<height; ++y)
 138                 for(unsigned x=0; x<width; ++x)
 139                         for(unsigned i=0; i<4; ++i)
 140                         {
 141                                 NodeCoordinates c(x, y, i);
 142                                 /* XXX This is not very efficient.  Should transform the ray to
 143                                 local coordinate system. */
 144                                 Vector node_pos = get_node_position(c);
 145                                 Vector v = node_pos-ray.get_start();
 146                                 float dist = (v-ray.get_direction()*dot(ray.get_direction(), v)).norm();
 147                                 if(closest_dist<0 || dist<closest_dist)
 148                                 {
 149                                         coords = c;
 150                                         closest_dist = dist;
 151                                 }
 152                         }
 153         return coords;
 154 }
 155
 156 void Terrain::save(list<DataFile::Statement> &st) const
 157 {
 158         st.push_back((DataFile::Statement("size"), width, height));
 159         for(vector<Tile>::const_iterator i=tiles.begin(); i!=tiles.end(); ++i)
 160         {
 161                 DataFile::Statement ss("tile");
 162                 i->save(ss.sub);
 163                 st.push_back(ss);
 164         }
 165 }
 166
 167
 168 Terrain::Node::Node():
 169         elevation(0),
 170         ground(0),
 171         wall(0)
 172 { }
 173
 174 void Terrain::Node::save(list<DataFile::Statement> &st) const
 175 {
 176         st.push_back((DataFile::Statement("elevation"), elevation));
 177         st.push_back((DataFile::Statement("ground"), ground));
 178 }
 179
 180
 181 Terrain::Tile::Tile():
 182         secondary_axis(false)
 183 { }
 184
 185 void Terrain::Tile::save(list<DataFile::Statement> &st) const
 186 {
 187         bool flat = true;
 188         for(unsigned i=1; (flat && i<4); ++i)
 189                 flat = (nodes[i].elevation==nodes[0].elevation && nodes[i].ground==nodes[0].ground && nodes[i].wall==nodes[0].wall);
 190         if(flat)
 191         {
 192                 st.push_back((DataFile::Statement("elevation"), nodes[0].elevation));
 193                 st.push_back((DataFile::Statement("ground"), nodes[0].ground));
 194         }
 195         else
 196         {
 197                 for(unsigned i=0; i<4; ++i)
 198                 {
 199                         DataFile::Statement ss("node");
 200                         ss.append(i);
 201                         nodes[i].save(ss.sub);
 202                         st.push_back(ss);
 203                 }
 204         }
 205 }
 206
 207
 208 Terrain::NodeCoordinates::NodeCoordinates():
 209         x(0),
 210         y(0),
 211         i(0)
 212 { }
 213
 214 Terrain::NodeCoordinates::NodeCoordinates(unsigned x_, unsigned y_, unsigned i_):
 215         x(x_),
 216         y(y_),
 217         i(i_)
 218 { }
 219
 220
 221 Terrain::Loader::Loader(Terrain &t):
 222         DataFile::ObjectLoader<Terrain>(t),
 223         next_tile(0)
 224 {
 225         add("position", &Loader::position);
 226         add("rotation", &Loader::rotation);
 227         add("size", &Loader::size);
 228         add("tile", &Loader::tile);
 229         add("tile", &Loader::tile_coords);
 230 }
 231
 232 void Terrain::Loader::position(float x, float y, float z)
 233 {
 234         obj.set_position(Vector(x, y, z));
 235 }
 236
 237 void Terrain::Loader::rotation(float a)
 238 {
 239         obj.set_rotation(Angle::from_radians(a));
 240 }
 241
 242 void Terrain::Loader::size(unsigned w, unsigned h)
 243 {
 244         obj.set_size(w, h);
 245 }
 246
 247 void Terrain::Loader::tile()
 248 {
 249         if(next_tile>=obj.tiles.size())
 250                 throw runtime_error("Terrain::Loader::tile");
 251
 252         Tile &t = obj.tiles[next_tile];
 253         Tile::Loader ldr(obj, t);
 254         load_sub_with(ldr);
 255         unsigned x = next_tile%obj.width;
 256         unsigned y = next_tile/obj.width;
 257         ++next_tile;
 258         obj.signal_tile_changed.emit(x, y);
 259 }
 260
 261 void Terrain::Loader::tile_coords(unsigned x, unsigned y)
 262 {
 263         if(x>=obj.width || y>=obj.height)
 264                 throw out_of_range("Terrain::Loader::tile");
 265         next_tile = x+y*obj.width;
 266         tile();
 267 }
 268
 269
 270 Terrain::Node::Loader::Loader(Terrain &t, Node &n):
 271         DataFile::ObjectLoader<Node>(n),
 272         terrain(t)
 273 {
 274         add("ground", &Loader::ground);
 275         add("elevation", &Node::elevation);
 276 }
 277
 278 void Terrain::Node::Loader::ground(unsigned g)
 279 {
 280         if(g>=terrain.type.get_n_surface_types())
 281                 throw out_of_range("Tile::Loader::surface");
 282         obj.ground = g;
 283 }
 284
 285
 286 Terrain::Tile::Loader::Loader(Terrain &t, Tile &l):
 287         DataFile::ObjectLoader<Tile>(l),
 288         terrain(t)
 289 {
 290         add("ground", &Loader::ground);
 291         add("elevation", &Loader::elevation);
 292         add("node", &Loader::node);
 293 }
 294
 295 void Terrain::Tile::Loader::ground(unsigned g)
 296 {
 297         if(g>=terrain.type.get_n_surface_types())
 298                 throw out_of_range("Tile::Loader::surface");
 299         for(unsigned i=0; i<4; ++i)
 300                 obj.nodes[i].ground = g;
 301 }
 302
 303 void Terrain::Tile::Loader::elevation(float h)
 304 {
 305         for(unsigned i=0; i<4; ++i)
 306                 obj.nodes[i].elevation = h;
 307 }
 308
 309 void Terrain::Tile::Loader::node(unsigned i)
 310 {
 311         if(i>=4)
 312                 throw out_of_range("Tile::Loader::node");
 313         Node::Loader ldr(terrain, obj.nodes[i]);
 314         load_sub_with(ldr);
 315 }
 316
 317 } // namespace R2C2