wip 1

kiln-core/src/board.rs

@@ -2,7 +2,7 @@ use crate::floor::Floor;
 use crate::fov::{color_to_rgb, FovCaster, Lighting};
 use crate::glyph::Glyph;
 use crate::log::LogLine;
-use crate::utils::Direction;
+use crate::utils::{Direction, Point};
 use crate::utils::{ObjectId, RegistryValue};
 use std::collections::{HashMap, HashSet};
 use crate::portal::Portal;
@@ -619,6 +619,30 @@ impl Board {
             }
         }
     }
+
+    /// Moves whatever is in `from` to `to`, leaving an empty cell behind. Silent no-op if either
+    /// `from` or `to` is out of bounds, or if they're the same cell.
+    pub fn move_cell(&mut self, from: Point, to: Point) {
+        if from != to && self.in_bounds(from.into()) && self.in_bounds(to.into()) {
+            let thing = self.get_mut(from.x as usize, from.y as usize).take();
+            self.grid[to.x as usize + to.y as usize * self.width] = thing;
+        }
+    }
+
+    /// Return whether the given point is empty
+    pub fn is_empty(&self, p: Point) -> bool {
+        self.get(p.x as usize, p.y as usize).is_none()
+    }
+
+    /// Return whether the given point contains the player
+    pub fn is_player(&self, p: Point) -> bool {
+        matches!(self.get(p.x as usize, p.y as usize), Some(Tile::Player))
+    }
+
+    /// Return whether the given point contains an object
+    pub fn is_object(&self, p: Point) -> bool {
+        matches!(self.get(p.x as usize, p.y as usize), Some(Tile::Object(_)))
+    }
 }
 
 #[cfg(test)]