working towards something that starts

src/main.rs

@@ -3,6 +3,8 @@ mod action;
 mod block;
 mod structure;
 
+mod world;
+
 fn main() {
-    println!("Hello, world!");
+
 }

src/world.rs

@@ -0,0 +1,35 @@
+use structure::Structure;
+use action::Action;
+use util::Point;
+use std::sync::mpsc::{Sender,Receiver,channel};
+
+pub struct World {
+    size: i32, // width and height of the grid
+    grid: Vec<Option<Structure>>, // access a structure using coordinates
+    structures: Vec<Structure> // list of all structures
+}
+
+impl World {
+    pub fn new(size: i32) -> World {
+        World {
+            size: size,
+            grid: Vec::new() as Vec<Option<Structure>>,
+            structures: Vec::new() as Vec<Structure>,
+        }
+    }
+    pub fn compute(&mut self) {
+
+    }
+    pub fn fix_coords(&self, p: Point) -> Point {
+        fn fix_coord(c: i32, limit: i32) -> i32 {
+            match c < 0 {
+                true => (c * -1) % limit,
+                false => match c >= limit {
+                    true => c % limit,
+                    false => c
+                }
+            }
+        };
+        Point { x: fix_coord(p.x,self.size), y: fix_coord(p.y,self.size) }
+    }
+}