Made pose() work on STL renders to match the documentation.

Change names of variables from `2a` and `2c` to `ax2` (a times 2) and
`cx2`, because variable names starting with a digit are deprecated in
OpenSCAD.

CHANGELOG.md

@@ -3,6 +3,58 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+#### [v21.35.4](https://github.com/nophead/NopSCADlib/releases/tag/v21.35.4 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v21.35.3...v21.35.4 "diff with v21.35.3")
+*   2025-03-23 [`fdbe0c7`](https://github.com/nophead/NopSCADlib/commit/fdbe0c7a9eba96823683b8e1161bc160bd63231e "show commit") [J.R.](# "Jeroen Roos") Change variable names that start with a digit
+
+ * Change names of variables from `2a` and `2c` to `ax2` (a times 2) and
+`cx2`, because variable names starting with a digit are deprecated in
+OpenSCAD.
+
+#### [v21.35.3](https://github.com/nophead/NopSCADlib/releases/tag/v21.35.3 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v21.35.2...v21.35.3 "diff with v21.35.2")
+*   2025-03-27 [`9f9aa67`](https://github.com/nophead/NopSCADlib/commit/9f9aa6723eff9b7439e17758406e9f8e409828ee "show commit") [C.P.](# "Chris Palmer") Third attempt to fix dimension image.
+
+#### [v21.35.2](https://github.com/nophead/NopSCADlib/releases/tag/v21.35.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v21.35.1...v21.35.2 "diff with v21.35.1")
+*   2025-03-27 [`6b6704b`](https://github.com/nophead/NopSCADlib/commit/6b6704b823291119697bf4993eddb3f2e6873875 "show commit") [C.P.](# "Chris Palmer") Second attempt to fix dimension image.
+
+#### [v21.35.1](https://github.com/nophead/NopSCADlib/releases/tag/v21.35.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v21.35.0...v21.35.1 "diff with v21.35.0")
+*   2025-03-27 [`117fb62`](https://github.com/nophead/NopSCADlib/commit/117fb626e7023ca92339947a0f84a8aee5c6429e "show commit") [C.P.](# "Chris Palmer") Fixed dimension example image address.
+
+### [v21.35.0](https://github.com/nophead/NopSCADlib/releases/tag/v21.35.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v21.34.0...v21.35.0 "diff with v21.34.0")
+*   2025-03-27 [`6dc8204`](https://github.com/nophead/NopSCADlib/commit/6dc82045fffeca383381724abb6d70d7025b2ae5 "show commit") [C.P.](# "Chris Palmer") Shortened the module comments by factoring out the parameter descriptions.
+Added the nut example picture.
+Fixed nut picture placement.
+Updated images and readme.
+
+*   2025-03-22 [`c50f95a`](https://github.com/nophead/NopSCADlib/commit/c50f95a203ead9070407fbae7d1247a00938b255 "show commit") [A.V.](# "Alex Verschoot") added some documentation to the nut
+
+*   2025-03-22 [`49bd6e0`](https://github.com/nophead/NopSCADlib/commit/49bd6e0a04885cf5cad7655aee038e16dc0a7e15 "show commit") [A.V.](# "Alex Verschoot") added negative offsets to test
+
+*   2025-03-22 [`921843c`](https://github.com/nophead/NopSCADlib/commit/921843cc09e7ae2953090c30e7d5b9c644e3b966 "show commit") [A.V.](# "Alex Verschoot") made negative offset work as expected (go to the opposite side, and use min instead of max on coordinates)
+
+*   2025-03-19 [`c17cc13`](https://github.com/nophead/NopSCADlib/commit/c17cc1321bcd06af439519435734f6e0eb8f5d43 "show commit") [A.V.](# "Alex Verschoot") Changed the module comments style
+
+*   2025-03-16 [`9862b3c`](https://github.com/nophead/NopSCADlib/commit/9862b3c3a347fac5bb355b1d62a02bdc0970221b "show commit") [A.V.](# "Alex Verschoot") typos
+
+*   2025-03-16 [`e87e19a`](https://github.com/nophead/NopSCADlib/commit/e87e19aa182acee64e3d47c282c81b7ef495bf81 "show commit") [A.V.](# "Alex Verschoot") removed `center` from experiment
+
+*   2025-03-16 [`4f68935`](https://github.com/nophead/NopSCADlib/commit/4f68935b5b56b7405eb6c1e0fae5845e8f800489 "show commit") [A.V.](# "Alex Verschoot") some cleanup
+
+*   2025-03-15 [`8992cce`](https://github.com/nophead/NopSCADlib/commit/8992cce7a62d2fec956aae64236ba19dc340603f "show commit") [A.V.](# "Alex Verschoot") added argument for text size, and improve auto size
+
+*   2025-03-15 [`106666e`](https://github.com/nophead/NopSCADlib/commit/106666ec493f6b088ee398b276e8734d0790a451 "show commit") [A.V.](# "Alex Verschoot") simplified the math to use rotates instead, added examples, and allowed the user to choose witch plane the x,y and z dimensions are in
+
+*   2025-03-13 [`f731f0f`](https://github.com/nophead/NopSCADlib/commit/f731f0fe98a3a3d975c34cd85ac4f618c2f1bf6b "show commit") [A.V.](# "Alex Verschoot") added a function to rotate around the dim axis
+
+*   2025-03-13 [`3a62198`](https://github.com/nophead/NopSCADlib/commit/3a62198183b6a1dce74479ae44e00b4d5e690431 "show commit") [A.V.](# "Alex Verschoot") replaced the new math functions with rotate and transform
+
+*   2025-03-07 [`0123885`](https://github.com/nophead/NopSCADlib/commit/012388571185c674293ba17de39e0db59a775ff4 "show commit") [A.V.](# "Alex Verschoot") Improved text alligment
+
+*   2025-03-02 [`b166ec4`](https://github.com/nophead/NopSCADlib/commit/b166ec47dd7e34e6798c1287d0ce8612a84e9be1 "show commit") [A.V.](# "Alex Verschoot") Remove old commented code from `dimension.scad`
+
+*   2025-03-02 [`6467de5`](https://github.com/nophead/NopSCADlib/commit/6467de5facdc2a5b6ccdbdbe32f703ba3faa70f4 "show commit") [A.V.](# "Alex Verschoot") Update `maths.scad`
+
+*   2025-03-02 [`dc683ed`](https://github.com/nophead/NopSCADlib/commit/dc683ed701b016a1c79800db2ed41aed9cf8cac6 "show commit") [A.V.](# "Alex Verschoot") added dimensions
+
 ### [v21.34.0](https://github.com/nophead/NopSCADlib/releases/tag/v21.34.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v21.33.0...v21.34.0 "diff with v21.33.0")
 *   2025-02-22 [`8623572`](https://github.com/nophead/NopSCADlib/commit/862357279a98c9511e2db166585065c660eb331d "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
 

readme.md

@@ -7253,7 +7253,7 @@ allows flexible positioning of the motors.
 ## Dimension
 Modules for adding dimensions to assembly views.
 
-<img src="docs/sliding_t_nut.png" width="500", height="378">
+![](docs/sliding_t_nut_small.png)
 
 * If `text` is empty, will display the measured distance.
 * `offset` will determine how much space is between the measured point and the dimension.

scripts/render.py

@@ -97,7 +97,7 @@ def render(target, type):
             render = "--preview" if type == 'stl' or colour != pp1 else "--render"
             tmp_name = tmp_dir + '/' + part[:-4] + '.png'
             dummy_deps_name = tmp_dir + '/tmp.deps' # work around for OpenSCAD issue #3879
-            openscad.run("-o", tmp_name, png_maker_name, colour_scheme, "--projection=p", image_size, cam, render, "--autocenter", "--viewall", "-d", dummy_deps_name)
+            openscad.run("-o", tmp_name, png_maker_name, colour_scheme, "--projection=p", image_size, cam, render, "-D$pose=1", "-D$explode=0", "--autocenter", "--viewall", "-d", dummy_deps_name)
             do_cmd(("magick "+ tmp_name + " -trim -resize 280x280 -background %s -gravity Center -extent 280x280 -bordercolor %s -border 10 %s"
                     % (background, background, tmp_name)).split())
             update_image(tmp_name, png_name)

utils/dimension.scad

@@ -20,7 +20,7 @@
 //
 //! Modules for adding dimensions to assembly views.
 //!
-//! <img src="docs/sliding_t_nut.png" width="500", height="378">
+//! ![](docs/sliding_t_nut_small.png)
 //!
 //! * If `text` is empty, will display the measured distance.
 //! * `offset` will determine how much space is between the measured point and the dimension.

utils/maths.scad

@@ -164,13 +164,13 @@ function xor(a,b) = (a && !b) || (!a && b);     //! Logical exclusive OR
 function cuberoot(x)= sign(x)*abs(x)^(1/3);
 
 function quadratic_real_roots(a, b, c) =        //! Returns real roots of a quadratic equation, biggest first. Returns empty list if no real roots
-    let(2a = 2 * a,
-        2c = 2 * c,
-        det = b^2 - 2a * 2c
+    let(ax2 = 2 * a,
+        cx2 = 2 * c,
+        det = b^2 - ax2 * cx2
     ) det < 0 ? [] :
         let(r = sqrt(det),
-            x1 = b < 0 ? 2c / (-b + r) : (-b - r) / 2a,
-            x2 = b < 0 ? (-b + r) / 2a : 2c / (-b - r)
+            x1 = b < 0 ? cx2 / (-b + r) : (-b - r) / ax2,
+            x2 = b < 0 ? (-b + r) / ax2 : cx2 / (-b - r)
         ) [x2, x1];
 
 function cubic_real_roots(a, b, c, d) = //! Returns real roots of cubic equation