initial game

include/Snake.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <deque>
+
+#include "Canvas.hpp"
+
+namespace canvas {
+
+struct WormObject : public Object {
+  size_t length;
+  int radius;
+};
+
+} // namespace canvas
+
+class Worm : protected canvas::WormObject {
+public:
+  Worm(canvas::WormObject obj) : WormObject(obj), track_{pos} {}
+
+  void add(Veci pos);
+
+  void draw(Veci offset = {}) const;
+
+  size_t get_length() { return length; }
+
+  void set_length(size_t length) { this->length = length; }
+
+  void inc_length(int inc) {
+    if (-inc > static_cast<int>(length)) {
+      length = 0;
+    } else {
+      length += inc;
+    }
+  }
+
+protected:
+  std::deque<Veci> track_;
+};