voxel: Add explicit connections to code

softwareComponents/voxelReconfig/src/reconfig/heuristic/mod.rs

@@ -8,7 +8,7 @@ pub enum Heuristic {
 }
 
 impl Heuristic {
-    pub fn get_fn<'a, TWorld>(self, goal: &TWorld) -> Box<dyn FnMut(&TWorld) -> usize + 'a>
+    pub fn get_fn<'a, TWorld>(self, goal: &TWorld) -> Box<dyn 'a + FnMut(&TWorld) -> usize>
     where
         TWorld: 'a + NormVoxelWorld + Eq + std::hash::Hash,
         TWorld::IndexType: num::Integer + std::hash::Hash,

softwareComponents/voxelReconfig/src/voxel_world/centered.rs

@@ -79,11 +79,9 @@ where
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(
-            self.world()
-                .all_voxels()
-                .map(|(orig_pos, voxel)| (self.get_new_pos(orig_pos), voxel)),
-        )
+        self.world()
+            .all_voxels()
+            .map(|(orig_pos, voxel)| (self.get_new_pos(orig_pos), voxel))
     }
 
     fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/impls/map_voxel_world.rs

@@ -61,7 +61,7 @@ impl<TIndex: MapVoxelWorldIndex> VoxelWorld for MapVoxelWorld<TIndex> {
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(self.data.iter().map(|(&OrdPos(pos), &voxel)| (pos, voxel)))
+        self.data.iter().map(|(&OrdPos(pos), &voxel)| (pos, voxel))
     }
 
     fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/impls/matrix_voxel_world.rs

@@ -82,20 +82,18 @@ impl<TIndex: MatrixVoxelWorldIndex> VoxelWorld for MatrixVoxelWorld<TIndex> {
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(
-            self.data
-                .get_data()
-                .zip(0..)
-                .flat_map(|(plain, x)| {
-                    plain.zip(0..).flat_map(move |(row, y)| {
-                        row.iter()
-                            .copied()
-                            .zip(0..)
-                            .map(move |(voxel, z)| (Self::to_position([x, y, z]).unwrap(), voxel))
-                    })
+        self.data
+            .get_data()
+            .zip(0..)
+            .flat_map(|(plain, x)| {
+                plain.zip(0..).flat_map(move |(row, y)| {
+                    row.iter()
+                        .copied()
+                        .zip(0..)
+                        .map(move |(voxel, z)| (Self::to_position([x, y, z]).unwrap(), voxel))
                 })
-                .filter_map(|(pos, voxel)| Some((pos, voxel.get_voxel()?))),
-        )
+            })
+            .filter_map(|(pos, voxel)| Some((pos, voxel.get_voxel()?)))
     }
 
     fn get_voxel(&self, position: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/impls/sortvec_voxel_world.rs

@@ -61,7 +61,7 @@ impl<TIndex: SortvecVoxelWorldIndex> VoxelWorld for SortvecVoxelWorld<TIndex> {
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(self.data.iter().map(|(&OrdPos(pos), &voxel)| (pos, voxel)))
+        self.data.iter().map(|(&OrdPos(pos), &voxel)| (pos, voxel))
     }
 
     fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/mod.rs

@@ -5,6 +5,7 @@ mod world_rotation;
 
 pub mod impls;
 pub mod traits;
+pub mod with_connections;
 
 pub use centered::CenteredVoxelWorld;
 pub use rotated::{rotate_voxel, RotatedVoxelWorld};

softwareComponents/voxelReconfig/src/voxel_world/rotated.rs

@@ -166,11 +166,11 @@ where
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(self.world().all_voxels().map(|(orig_pos, voxel)| {
+        self.world().all_voxels().map(|(orig_pos, voxel)| {
             let rot_voxel = rotate_voxel(voxel, self.rotation);
             let rot_pos = self.get_new_pos(orig_pos);
             (rot_pos, rot_voxel)
-        }))
+        })
     }
 
     fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/subworld.rs

@@ -115,11 +115,9 @@ impl<'a, TWorld: VoxelWorld> VoxelWorld for VoxelSubworld<'a, TWorld> {
     }
 
     fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-        Box::new(
-            self.included
-                .iter()
-                .map(|&OrdPos(pos)| (pos, self.world.get_voxel(pos).unwrap())),
-        )
+        self.included
+            .iter()
+            .map(|&OrdPos(pos)| (pos, self.world.get_voxel(pos).unwrap()))
     }
 
     fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {
@@ -207,11 +205,9 @@ pub mod complement {
         }
 
         fn all_voxels(&self) -> Self::PosVoxelIter<'_> {
-            Box::new(
-                self.underlying_world()
-                    .all_voxels()
-                    .filter(|&(pos, _)| self.contains(pos)),
-            )
+            self.underlying_world()
+                .all_voxels()
+                .filter(|&(pos, _)| self.contains(pos))
         }
 
         fn get_voxel(&self, pos: Pos<Self::IndexType>) -> Option<Voxel> {

softwareComponents/voxelReconfig/src/voxel_world/with_connections/impls/map_connections.rs

@@ -0,0 +1,90 @@
+use super::super::Connections;
+use crate::atoms::Axis;
+use crate::pos::ord::OrdPos;
+use crate::pos::Pos;
+use std::collections::{btree_map, BTreeMap};
+
+pub trait MapConnectionsIndex:
+    num::Signed + Ord + Copy + std::hash::Hash + std::fmt::Debug
+{
+}
+impl<T> MapConnectionsIndex for T where
+    Self: num::Signed + Ord + Copy + std::hash::Hash + std::fmt::Debug
+{
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MapConnections<IndexType: MapConnectionsIndex> {
+    connections: BTreeMap<OrdPos<IndexType>, [bool; 3]>,
+}
+
+impl<IndexType: MapConnectionsIndex> Default for MapConnections<IndexType> {
+    fn default() -> Self {
+        Self {
+            connections: Default::default(),
+        }
+    }
+}
+
+fn axes_from_inner_value(axes_connected: [bool; 3]) -> smallvec::SmallVec<[Axis; 3]> {
+    axes_connected
+        .into_iter()
+        .zip(enum_iterator::all())
+        .filter(|&(axis_connected, _)| axis_connected)
+        .map(|(_, axis)| axis)
+        .collect()
+}
+
+impl<TIndex: MapConnectionsIndex> Connections for MapConnections<TIndex> {
+    type IndexType = TIndex;
+    type ConnectionIter<'a> = impl 'a + Iterator<Item = (Pos<Self::IndexType>, Axis)>
+    where
+        Self: 'a;
+
+    fn connect(&mut self, pos_from: Pos<Self::IndexType>, connected_to: Axis) {
+        self.connections.entry(OrdPos(pos_from)).or_default()[connected_to.as_index()] = true;
+    }
+
+    fn disconnect(&mut self, pos_from: Pos<Self::IndexType>, connected_to: Axis) {
+        if let btree_map::Entry::Occupied(mut entry) = self.connections.entry(OrdPos(pos_from)) {
+            entry.get_mut()[connected_to.as_index()] = false;
+            if entry.get().iter().all(|&value| !value) {
+                // Respect default equality
+                entry.remove();
+            }
+        }
+    }
+
+    fn is_connected(&self, pos_from: Pos<Self::IndexType>, connected_to: Axis) -> bool {
+        if let Some(connections) = self.connections.get(&OrdPos(pos_from)) {
+            connections[connected_to.as_index()]
+        } else {
+            false
+        }
+    }
+
+    fn connections_from(&self, pos_from: Pos<Self::IndexType>) -> smallvec::SmallVec<[Axis; 3]> {
+        self.connections
+            .get(&OrdPos(pos_from))
+            .copied()
+            .map_or_else(Default::default, axes_from_inner_value)
+    }
+
+    fn all_connections(&self) -> Self::ConnectionIter<'_> {
+        self.connections.iter().flat_map(|(&OrdPos(pos), &axes)| {
+            axes_from_inner_value(axes)
+                .into_iter()
+                .map(move |axis| (pos, axis))
+        })
+    }
+
+    fn from_connections(
+        connections_iter: impl IntoIterator<Item = (Pos<Self::IndexType>, Axis)>,
+    ) -> Self {
+        let mut result = Self::default();
+        for (pos, axis) in connections_iter {
+            result.connect(pos, axis);
+        }
+        result
+    }
+}

softwareComponents/voxelReconfig/src/voxel_world/with_connections/impls/mod.rs

@@ -0,0 +1,2 @@
+pub mod map_connections;
+pub mod set_connections;

softwareComponents/voxelReconfig/src/voxel_world/with_connections/impls/set_connections.rs

@@ -0,0 +1,76 @@
+use super::super::Connections;
+use crate::atoms::Axis;
+use crate::pos::ord::OrdPos;
+use crate::pos::Pos;
+use enum_iterator::Sequence;
+use std::collections::BTreeSet;
+
+pub trait SetConnectionsIndex:
+    num::Signed + Ord + Copy + std::hash::Hash + std::fmt::Debug
+{
+}
+impl<T> SetConnectionsIndex for T where
+    Self: num::Signed + Ord + Copy + std::hash::Hash + std::fmt::Debug
+{
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SetConnections<IndexType: SetConnectionsIndex> {
+    connections: BTreeSet<(OrdPos<IndexType>, Axis)>,
+}
+
+impl<TIndex: SetConnectionsIndex> Default for SetConnections<TIndex> {
+    fn default() -> Self {
+        Self {
+            connections: Default::default(),
+        }
+    }
+}
+
+fn iter_adaptor<TIndex: num::Num + Copy>(value: &(OrdPos<TIndex>, Axis)) -> (Pos<TIndex>, Axis) {
+    let &(OrdPos(pos), axis) = value;
+    (pos, axis)
+}
+
+impl<TIndex: SetConnectionsIndex> Connections for SetConnections<TIndex> {
+    type IndexType = TIndex;
+    type ConnectionIter<'a> = impl 'a + Iterator<Item = (Pos<Self::IndexType>, Axis)>
+    where
+        Self: 'a;
+
+    fn connect(&mut self, pos_from: Pos<Self::IndexType>, connected_to: Axis) {
+        self.connections.insert((OrdPos(pos_from), connected_to));
+    }
+
+    fn disconnect(&mut self, pos_from: Pos<Self::IndexType>, connected_to: Axis) {
+        self.connections.remove(&(OrdPos(pos_from), connected_to));
+    }
+
+    fn is_connected(&self, pos_from: Pos<Self::IndexType>, connected_to: Axis) -> bool {
+        self.connections.contains(&(OrdPos(pos_from), connected_to))
+    }
+
+    fn connections_from(&self, pos_from: Pos<Self::IndexType>) -> smallvec::SmallVec<[Axis; 3]> {
+        let first_axis = Axis::first().unwrap();
+        let last_axis = Axis::last().unwrap();
+        self.connections
+            .range((OrdPos(pos_from), first_axis)..=(OrdPos(pos_from), last_axis))
+            .map(|&(_, axis)| axis)
+            .collect()
+    }
+
+    fn all_connections(&self) -> Self::ConnectionIter<'_> {
+        self.connections.iter().map(iter_adaptor)
+    }
+
+    fn from_connections(
+        connections_iter: impl IntoIterator<Item = (Pos<Self::IndexType>, Axis)>,
+    ) -> Self {
+        Self {
+            connections: connections_iter
+                .into_iter()
+                .map(|(pos, axis)| (OrdPos(pos), axis))
+                .collect(),
+        }
+    }
+}