Redefine idle_orders in_combat

Now it passes if either the unit has a cooldown active
(It attacked recently), or an enemy is targeting it and close enough to
attack.

Cargo.toml

@@ -26,6 +26,7 @@ byteorder = "1.1"
 chrono = "0.4"
 directories = "1.0.2"
 fern = "0.5"
+fxhash = "0.2.1"
 lazy_static = "1.0"
 libc = "0.2"
 log = "0.4"

bw_dat/src/lib.rs

@@ -366,6 +366,10 @@ impl UnitId {
     pub fn rclick_action(&self) -> u8 {
         self.get(28) as u8
     }
+
+    pub fn sight_range(&self) -> u32 {
+        self.get(24)
+    }
 }
 
 #[derive(Eq, PartialEq, Copy, Clone)]
@@ -409,6 +413,10 @@ impl WeaponId {
     pub fn label(&self) -> u32 {
         self.get(0)
     }
+
+    pub fn max_range(&self) -> u32 {
+        self.get(5)
+    }
 }
 
 impl UpgradeId {

src/bw/mod.rs

@@ -173,6 +173,36 @@ pub fn distance(a: Point, b: Point) -> u32 {
     }
 }
 
+pub fn rect_distance(a: &Rect, b: &Rect) -> u32 {
+    let horizontal_overlap = a.left < b.right && a.right > b.left;
+    let vertical_overlap = a.top < b.bottom && a.bottom > b.top;
+    let x_diff = match horizontal_overlap {
+        true => 0,
+        false => match a.left < b.left {
+            true => b.left - a.right,
+            false => a.left - b.right,
+        },
+    };
+    let y_diff = match vertical_overlap {
+        true => 0,
+        false => match a.top < b.top {
+            true => b.top - a.bottom,
+            false => a.top - b.bottom,
+        },
+    };
+
+    distance(
+        Point {
+            x: 0,
+            y: 0,
+        },
+        Point {
+            x: x_diff,
+            y: y_diff,
+        },
+    )
+}
+
 pub fn town_array_start() -> *mut AiTown {
     let ptr = samase::active_towns();
     if ptr.is_null() {