From ca40a5c1207ff9f59eec76cab2d57d9a4f70fe52 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Sat, 28 Sep 2019 18:14:59 +0800
Subject: [PATCH] rename

---
 src/turtle/t2d.scad | 56 ++++++++++++++++++++++-----------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/src/turtle/t2d.scad b/src/turtle/t2d.scad
index 9992f5db..66fc80eb 100644
--- a/src/turtle/t2d.scad
+++ b/src/turtle/t2d.scad
@@ -10,45 +10,45 @@
 
 function _t2d_turtle(point, angle) = [point, angle];
 
-function _t2d_set_point(turtle, point) = [point, _t2d_get_angle(turtle)];
+function _t2d_set_point(t, point) = [point, _t2d_get_angle(t)];
 
-function _t2d_set_x(turtle, x) = [[x, _t2d_get_y(turtle)], _t2d_get_angle(turtle)];
-function _t2d_set_y(turtle, y) = [[_t2d_get_x(turtle), y], _t2d_get_angle(turtle)];
-function _t2d_set_angle(turtle, angle) = [_t2d_get_pt(turtle), angle];
+function _t2d_set_x(t, x) = [[x, _t2d_get_y(t)], _t2d_get_angle(t)];
+function _t2d_set_y(t, y) = [[_t2d_get_x(t), y], _t2d_get_angle(t)];
+function _t2d_set_angle(t, angle) = [_t2d_get_pt(t), angle];
 
-function _t2d_forward(turtle, leng) = 
+function _t2d_forward(t, leng) = 
     _t2d_turtle(
         [
-            _t2d_get_x(turtle) + leng * cos(_t2d_get_angle(turtle)), 
-            _t2d_get_y(turtle) + leng * sin(_t2d_get_angle(turtle))
+            _t2d_get_x(t) + leng * cos(_t2d_get_angle(t)), 
+            _t2d_get_y(t) + leng * sin(_t2d_get_angle(t))
         ], 
-        _t2d_get_angle(turtle)
+        _t2d_get_angle(t)
     );
 
-function _t2d_turn(turtle, angle) = [_t2d_get_pt(turtle), _t2d_get_angle(turtle) + angle];
+function _t2d_turn(t, angle) = [_t2d_get_pt(t), _t2d_get_angle(t) + angle];
 
-function _t2d_get_x(turtle) = turtle[0][0];
-function _t2d_get_y(turtle) = turtle[0][1];
-function _t2d_get_pt(turtle) = turtle[0];
-function _t2d_get_angle(turtle) = turtle[1];
+function _t2d_get_x(t) = t[0][0];
+function _t2d_get_y(t) = t[0][1];
+function _t2d_get_pt(t) = t[0];
+function _t2d_get_angle(t) = t[1];
 
-function _t2d_two_args_command(cmd, arg1, arg2) =
-    is_undef(arg2) ? _t2d_one_arg_command(cmd, arg1) : 
-    cmd == "point" ? _t2d_set_point(arg1, arg2) : 
-    cmd == "x" ? _t2d_set_x(arg1, arg2) : 
-    cmd == "y" ? _t2d_set_y(arg1, arg2) : 
-    cmd == "angle" ? _t2d_set_angle(arg1, arg2) : 
-    cmd == "forward" ? _t2d_forward(arg1, arg2) : 
-    cmd == "turn" ? _t2d_turn(arg1, arg2) : assert(false, "unknown command");
+function _t2d_two_args_command(cmd, t, arg) =
+    is_undef(arg) ? _t2d_one_arg_command(cmd, t) : 
+    cmd == "point" ? _t2d_set_point(t, arg) : 
+    cmd == "x" ? _t2d_set_x(t, arg) : 
+    cmd == "y" ? _t2d_set_y(t, arg) : 
+    cmd == "angle" ? _t2d_set_angle(t, arg) : 
+    cmd == "forward" ? _t2d_forward(t, arg) : 
+    cmd == "turn" ? _t2d_turn(t, arg) : assert(false, "unknown command");
     
-function _t2d_one_arg_command(cmd, arg) =
-    cmd == "x" ? _t2d_get_x(arg) : 
-    cmd == "y" ? _t2d_get_y(arg) : 
-    cmd == "angle" ? _t2d_get_angle(arg) : 
-    cmd == "point" ? _t2d_get_pt(arg) : assert(false, "unknown command");
+function _t2d_one_arg_command(cmd, t) =
+    cmd == "x" ? _t2d_get_x(t) : 
+    cmd == "y" ? _t2d_get_y(t) : 
+    cmd == "angle" ? _t2d_get_angle(t) : 
+    cmd == "point" ? _t2d_get_pt(t) : assert(false, "unknown command");
 
-function _t2d_cmdline(cmd, arg1, arg2) = 
-     _t2d_two_args_command(cmd, arg1, arg2);
+function _t2d_cmdline(cmd, t, arg) = 
+     _t2d_two_args_command(cmd, t, arg);
 
 function _t2d_set(t, point, angle, x, y) =
     !is_undef(point) ? _t2d_set_point(t, point) :