From a102663b1af78bc22b3608e78418ef16428f231e Mon Sep 17 00:00:00 2001
From: Revar Desmera <revarbat@gmail.com>
Date: Wed, 25 Mar 2020 01:37:01 -0700
Subject: [PATCH] Fixed Basits tutorial mirror example images.

---
 scripts/make_tutorials.sh | 2 +-
 transforms.scad           | 5 ++++-
 tutorials/Basics.md       | 6 +++---
 version.scad              | 2 +-
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/scripts/make_tutorials.sh b/scripts/make_tutorials.sh
index a46fd26..13b0159 100755
--- a/scripts/make_tutorials.sh
+++ b/scripts/make_tutorials.sh
@@ -30,7 +30,7 @@ rm -f tmp_*.scad
 for base in $PREVIEW_LIBS; do
     base="$(basename $base .md)"
     mkdir -p images/tutorials
-    rm -f images/tutorials/$base_*.png images/tutorials/*.gif
+    rm -f images/tutorials/${base}_*.png images/tutorials/${base}_*.gif
     echo "$base.md"
     ../scripts/tutorial_gen.py ../tutorials/$base.md -o Tutorial-$base.md $FORCED -I images/tutorials/ || exit 1
     if [ "$DISPMD" != "" ]; then
diff --git a/transforms.scad b/transforms.scad
index 99a3b42..83295a2 100644
--- a/transforms.scad
+++ b/transforms.scad
@@ -551,6 +551,8 @@ function zrot(a=0, cp=undef, p=undef) = rot(a, cp=cp, p=p);
 //   #stroke(path,closed=true);
 //   stroke(scale([1.5,3],p=path),closed=true);
 function scale(v=1, p=undef) =
+	assert(is_vector(v))
+	assert(is_undef(p) || is_list(p))
 	let(v = is_num(v)? [v,v,v] : v)
 	is_undef(p)? (
 		len(v)==2? affine2d_scale(v) : affine3d_scale(point3d(v))
@@ -735,7 +737,8 @@ function zscale(z=1, p=undef) = scale([1,1,z],p=p);
 //   #stroke(path,closed=true);
 //   stroke(mirror(n, p=path),closed=true);
 function mirror(v, p) =
-	assert(is_list(p))
+	assert(is_vector(v))
+	assert(is_undef(p) || is_list(p))
 	let(m = len(v)==2? affine2d_mirror(v) : affine3d_mirror(v))
 	is_undef(p)? m :
 	is_num(p.x)? apply(m,p) :
diff --git a/tutorials/Basics.md b/tutorials/Basics.md
index 7aec166..f9522af 100644
--- a/tutorials/Basics.md
+++ b/tutorials/Basics.md
@@ -147,8 +147,8 @@ Constant                       | Value        | Direction
 `BACK`                         | `[ 0, 1, 0]` | Towards Y+
 `DOWN`, `BOTTOM`, `BOT`, `BTM` | `[ 0, 0,-1]` | Towards Z-
 `UP`, `TOP`                    | `[ 0, 0, 1]` | Towards Z+
+`ALLNEG`                       | `[-1,-1,-1]` | Towards X-Y-Z-
 `ALLPOS`                       | `[ 1, 1, 1]` | Towards X+Y+Z+
-`ALLNEG`                       | `[-1,-1,-1]` | Towards X+Y+Z+
 
 This lets you rewrite the above vector rotation more clearly as:
 ```openscad
@@ -161,13 +161,13 @@ This lets you rewrite the above vector rotation more clearly as:
 The standard `mirror()` command works like this:
 ```openscad
     #yrot(60) cylinder(h=50, d1=20, d2=10);
-    mirror([1,0,0]) yrot(-60) cylinder(h=50, d1=20, d2=10);
+    mirror([1,0,0]) yrot(60) cylinder(h=50, d1=20, d2=10);
 ```
 
 BOSL2 provides shortcuts for mirroring across the standard axes; `xflip()`, `yflip()`, and `zflip()`:
 ```openscad
     #yrot(60) cylinder(h=50, d1=20, d2=10);
-    xflip() yrot(-60) cylinder(h=50, d1=20, d2=10);
+    xflip() yrot(60) cylinder(h=50, d1=20, d2=10);
 ```
 
 ```openscad
diff --git a/version.scad b/version.scad
index 852f15e..6e58e8e 100644
--- a/version.scad
+++ b/version.scad
@@ -8,7 +8,7 @@
 //////////////////////////////////////////////////////////////////////
 
 
-BOSL_VERSION = [2,0,225];
+BOSL_VERSION = [2,0,226];
 
 
 // Section: BOSL Library Version Functions