Deletion implemented

src/infrastructure/road.zig

@@ -11,6 +11,7 @@ pub const Road = struct {
     /// Calculated road length
     length: f32,
 
+    /// Constructor, which sets nodes for the road and calculates its length
     pub fn init(new_id: usize, start: *Node, end: *Node) Road {
         var road: Road = .{
             .id = new_id,
@@ -22,6 +23,11 @@ pub const Road = struct {
         return road;
     }
 
+    /// This makes the road ptr DEAD
+    pub fn deinit(self: *Road, allocator: std.mem.Allocator) void {
+        allocator.destroy(self);
+    }
+
     /// Calculates length of the road by taking its two nodes
     fn calculate_length(self: *const Road) f32 {
         const start = self.nodes[0];
@@ -34,8 +40,26 @@ pub const Road = struct {
         return @sqrt(square_diff);
     }
 
-    pub fn draw(self: *const Road) void {
-        rl.drawLineEx(self.nodes[0].*.pos, self.nodes[1].*.pos, c.ROAD_SIZE, c.ROAD_COLOUR);
+    /// Simple function which draws the node
+    ///
+    /// In the future as we improve and make roads more complex with multiple lanes and such
+    /// it will gradually become more complex
+    pub fn draw(self: *const Road, highlighted: bool) void {
+        const colour = if (highlighted) c.ROAD_HIGHLIGHTED_COLOUR else c.ROAD_COLOUR;
+        rl.drawLineEx(self.nodes[0].*.pos, self.nodes[1].*.pos, c.ROAD_SIZE, colour);
+    }
+
+    /// Important: after this function executes, this road is no longer reachable from its bounding nodes
+    ///
+    /// The function unreferences self (road) from its bounding nodes
+    pub fn unreferenceNodes(self: *const Road) !void {
+        try self.nodes[0].unreferenceRoad(self);
+        try self.nodes[1].unreferenceRoad(self);
+    }
+
+    /// Checks whether pos coordinate is on the referenced road
+    pub fn isHighlighted(self: *const Road, pos: rl.Vector2) bool {
+        return rl.checkCollisionPointLine(pos, self.nodes[0].*.pos, self.nodes[1].*.pos, c.ROAD_SIZE);
     }
 };