Initial work on entities.

1 files changed, 22 insertions, 1 deletions

diff --git a/src/world.cpp b/src/world.cpp
index dc25f66..9d9b97d 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -83,9 +83,30 @@ tile_t *world_t::get_tile(ssize_t x, ssize_t y)
 	return sector->tiles + ty * SECTOR_SIZE + tx;
 }
 
+static sector_index_t get_index(float x, float y)
+{
+	return sector_index_t(floor(x), floor(y));
+}
+
+void entity_t::link_to_sector(sector_t *sector)
+{
+	parents.push_back(sector);
+	sector->ents.insert(this);
+}
+
 void entity_t::link(world_t *world)
 {
-	// TODO
+	sector_index_t base;
+	sector_t *sector;
+	ssize_t dx, dy;
+
+	// An entity gets linked to at least one sector.
+	base = get_index(bounds.left, bounds.top);
+	sector = world->get_sector(base);
+	link_to_sector(sector);
+
+	// There might be more, though.
+	//for (dy = 0; dy < 
 }
 
 void entity_t::unlink(void)