Use angle from dna

inc/canvas/Tree.hpp

@@ -40,4 +40,5 @@ private:
   inline int get_start_size(DrawArgs &arg);
   inline int get_end_size(DrawArgs &arg, int start);
   inline float get_lenght(DrawArgs &arg);
+  inline float get_angle_var(DrawArgs &arg);
 };

inc/values/Dna.hpp

@@ -7,6 +7,8 @@
 #include <raylib.h>
 
 #define MAX_DEPTH 8
+#define MAX_POSIBLE_DEPTH 11
+static_assert(MAX_DEPTH <= MAX_POSIBLE_DEPTH);
 
 struct uint128
 {