Basic drawing

src/infrastructure/node.zig

@@ -1,21 +1,43 @@
+const std = @import("std");
 const rl = @import("raylib");
 
 const c = @import("../constants.zig");
+const Road = @import("road.zig").Road;
 
 pub const Node = struct {
     id: usize,
     pos: rl.Vector2,
+    roads: std.ArrayList(*Road),
 
     pub fn init(new_id: usize, new_pos: rl.Vector2) Node {
         return .{
             .id = new_id,
             .pos = new_pos,
+            .roads = .empty,
         };
     }
 
+    pub fn deinit(self: *Node, allocator: std.mem.Allocator) void {
+        self.roads.deinit(allocator);
+    }
+
     pub fn draw(self: *const Node, direct_colour: ?rl.Color) void {
         const colour = if (direct_colour) |clr| clr else c.NODE_COLOUR;
 
         rl.drawCircleV(self.pos, c.NODE_RADIUS, colour);
     }
+
+    pub fn posWithinRadius(self: *const Node, pos: rl.Vector2) bool {
+        return rl.checkCollisionPointCircle(pos, self.pos, c.NODE_SNAP_RADIUS);
+    }
+
+
+    pub fn referenceRoad(self: *Node, allocator: std.mem.Allocator, road_to_add: *Road) !void {
+        // Note the road_to_add pointer must be one from the roads list as otherwise the pointer is dangling one
+        for (self.roads.items) |road| {
+            if (road.*.id == road_to_add.*.id) return error.RoadAlreadyReferenced;
+        }
+
+        try self.roads.append(allocator, road_to_add);
+    }
 };