refactor: split structures and functions into related modules

src/grid/manipulation.rs

@@ -0,0 +1,31 @@
+use bevy::math::UVec3;
+use crate::grid::{Grid, GridElement};
+
+pub struct GridManipulationTools<'a> {
+    grid: &'a mut Grid
+}
+
+impl<'a> GridManipulationTools<'a> {
+    pub fn new(grid: &'a mut Grid) -> Self {
+        Self { grid }
+    }
+    pub fn set_xyz(&mut self,x: u32, y: u32, z: u32, element: GridElement) {
+       let index = self.grid.indexify(UVec3::new(x,y,z));
+       self.grid.data[index] = element;
+    }
+    pub fn fill_xyz(&mut self,x1: u32, y1: u32, z1: u32, x2: u32, y2: u32, z2: u32, element: GridElement) {
+        if x1 > x2 || y1 > y2 || z1 > z2 {
+            return;
+        }
+
+        for x in x1..=x2 {
+            for y in y1..=y2 {
+                for z in z1..=z2 {
+                    let index = self.grid.indexify(UVec3::new(x,y,z));
+
+                    self.grid.data[index] = element.clone();
+                }
+            }
+        }
+    }
+}