cross: DimSlice: allow the underlying data to be a Vec

crates/cross/src/dim/dim_slice.rs

@@ -7,7 +7,7 @@ use crate::vec::Vec3u;
 /// use this to wrap a flat region of memory into something which can be indexed by coordinates in
 /// 3d space.
 #[cfg_attr(feature = "fmt", derive(Debug))]
-#[derive(PartialEq)]
+#[derive(Clone, PartialEq)]
 pub struct DimSlice<T> {
     dim: Vec3u,
     items: T,
@@ -78,6 +78,42 @@ impl<'a, T: IndexMut<usize> + ?Sized> IndexMut<Vec3u> for DimSlice<&'a mut T> {
     }
 }
 
+#[cfg(feature = "std")]
+impl<T> Index<Vec3u> for DimSlice<Vec<T>> {
+    type Output=T;
+
+    fn index(&self, idx: Vec3u) -> &Self::Output {
+        let idx = index(idx, self.dim);
+        &self.items[idx]
+    }
+}
+
+#[cfg(feature = "std")]
+impl<T> IndexMut<Vec3u> for DimSlice<Vec<T>> {
+    fn index_mut(&mut self, idx: Vec3u) -> &mut Self::Output {
+        let idx = index(idx, self.dim);
+        &mut self.items[idx]
+    }
+}
+
+#[cfg(feature = "std")]
+impl<T> Index<Vec3u> for DimSlice<Box<[T]>> {
+    type Output=T;
+
+    fn index(&self, idx: Vec3u) -> &Self::Output {
+        let idx = index(idx, self.dim);
+        &self.items[idx]
+    }
+}
+
+#[cfg(feature = "std")]
+impl<T> IndexMut<Vec3u> for DimSlice<Box<[T]>> {
+    fn index_mut(&mut self, idx: Vec3u) -> &mut Self::Output {
+        let idx = index(idx, self.dim);
+        &mut self.items[idx]
+    }
+}
+
 impl<T: IntoIterator> IntoIterator for DimSlice<T> {
     type Item = T::Item;
     type IntoIter = T::IntoIter;

crates/cross/src/dim/offset_dim_slice.rs

@@ -7,7 +7,7 @@ use crate::vec::Vec3u;
 
 
 #[cfg_attr(feature = "fmt", derive(Debug))]
-#[derive(PartialEq)]
+#[derive(Clone, PartialEq)]
 pub struct OffsetDimSlice<T> {
     offset: Vec3u,
     inner: DimSlice<T>,