Basic drawing

src/infrastructure/road_manager.zig

@@ -1,11 +1,14 @@
 const std = @import("std");
 const Road = @import("road.zig").Road;
+const Node = @import("node.zig").Node;
 
 pub const RoadManager = struct {
+    next_id: usize,
     roads: std.ArrayList(Road),
 
     pub fn init() RoadManager {
         return .{
+            .next_id = 0,
             .roads = .empty,
         };
     }
@@ -19,4 +22,25 @@ pub const RoadManager = struct {
             road.draw();
         }
     }
+
+    pub fn addRoad(self: *RoadManager, allocator: std.mem.Allocator, start: *Node, end: *Node) !void {
+        const road: Road = .init(self.getNextID(), start, end);
+        try self.roads.append(allocator, road);
+
+        const ref = &self.roads.items[self.roads.items.len - 1];
+        try ref.*.nodes[0].referenceRoad(allocator, ref);
+        try ref.*.nodes[1].referenceRoad(allocator, ref);
+    }
+
+    fn getNextID(self: *RoadManager) usize {
+        const id = self.next_id;
+        self.next_id += 1;
+
+        return id;
+    }
+
+    pub fn clear(self: *RoadManager) void {
+        self.roads.clearRetainingCapacity();
+        self.next_id = 0;
+    }
 };