Hello everyone,

I'm hoping someone can help me out here as it's really beginning to be a pain for me and after hours of googling I cannot find the answer that solves this problem.

I'm using fredo6's bezier plug in to create smooth track sections which works perfectly until track begins to twist.

Here is an example of the track without a twist dropping downwards

As you can see the rails are aligned nicely to the track ties all the way along the track.

I did this by creating a bezier curve straight along both axis til they meet on the blue axis then divide both these lines by 3 and draw the cubic bezier 2/3 along these lines which will create the curve. Then the same process is repeated for the left and right rail giving you the above result.

However when the track twists down the same path the curves pull inwards towards the curve making the rails thinner than the track ties

To solve this I could snap the bezier curve to each tie along the path and itl be perfect as the node number isn't important it can be many but in order to do this I need to see the control handles that are making the curve from tie to tie (as seen in blender in the aligned bezier curve)

This doesn't happen with any bezier plug in I've found so far but without those control handle positions the game cannot import the track.

Does anybody know how I can create accurate bezier curves for the track as it twists showing the handle positions (maybe via a Construction line) so that I can snap fredo6's bezier curve to the track ties and export the bezier data as required by the game)

If anyone can help but need more info please let me know!

Blender example for visual reference (aligned)

Thank you for the fast response
I will try this later using su2ase as a framework

I'll post my progress later

Max

Apologies for the lack of info, I know nothing about coding ( I wish I did )

I'm currently on my phone do can't provide script examples ATM

I modified an exporter plugin which can export the x y z positions of the nodes but in a simple x y z format with no extra data

When I add
Out.puts "<model xmlns=""/>"
This creates an error or unexpected error expecting kend

My friend has recently told me that I need to swap my " for ' to make it read as a string

But the next one
Out.print
Requires both string and data
'<position> x=' (x position code) 'y=' (y position code) 'z=' ( z position code)
I have the x y z position code which exports all three in a single line which I can link later

If someone can fix the above 2 lines of code then I think I can make the exporter work

If not here's the info you asked for

Text objects can be named anything it only requires its position these are exported out as construction points

There are 2 spline groups which are named in sketchup as there respective group names
Left and right were examples however this is not important as your reference that name in a separate file later

All the groups are selected with the nodes inside them and then exported as selected

The x y z values of each node vary on the position of the text object in sketchup ( at the point you place the arrow to)
Position, next and previous all carry the same positions per node

Units are exported as metric metres to a precision of either 0.00 or 0.000

To explain this scenario to everybody it is a piece of rollercoaster track for the game rollercoaster tycoon 3

Currently to get the spline data you need to export model to blender then add splines which I hate

I then found that the position next and previous only adjust the smoothness of the curve to which I thought making them all the same and adding more nodes will also make the curve smooth

The text objects are as you see in the picture they create the curves left and right side of the track that the game then follows with the wheels of the car

My
Best example is belgabors su2ase plugin if you get this and create just one text object highlight it and export it to ase you will see his file structure

In this structure you will see piece called vertex and after this has the x y z values for that node

If you add more it exports them all as selected

I deleted all the info this plugin was writing to only output that vertex code

I then tried it and it exported all the nodes as I wanted but clearly not in a modxml format as above

So I thought if I alter his plugin to write the XML code around this data then it would create my full spline modxml file to simply code into the game

This is because the track could have over 100 nodes if the game allows this many and hand writing x y z for each node per track piece would be ridiculous

This plugin does that all without any editing needed

Once this works I will then try to alter the controlpoints plugin I have what adds crosses at each segment of a curve to replace the cross with text objects

Then I draw the curve with however many edges I want add control points then make it a group and export via the plugin here

Anymore info I can happily send you the files later I currently experimented on

Also I asked permission off belgabor to edit these files he agreed as long as he was mentioned and was under the Gpu license

hello,
i was wondering if somebody can create me a ruby script for sketchup?

for me its impossible but is a massive time saver but i think to someone who knows ruby script this will be basic knowlegde

all it needs to do is create an modxml file that saves text positions as nodes and in the group name

here's what i want

plugins (Menu)
-Modxml
--Spline Exporter

once that is clicked it creates this

<span class="syntaxdefault"></span><span class="syntaxkeyword"><</span><span class="syntaxdefault">model&nbsp;xmlns</span><span class="syntaxkeyword">=</span><span class="syntaxstring">""</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">system&nbsp;handedness</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"right"&nbsp;</span><span class="syntaxdefault">up</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"z"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">spline&nbsp;name</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(GROUPNAME)"&nbsp;</span><span class="syntaxdefault">cyclic</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0"</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">position&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(X&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Y&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Z&nbsp;POSITION)"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlPrev&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxdefault">x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(X&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Y&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Z&nbsp;POSITION)"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlNext&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxdefault">x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(X&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Y&nbsp;POSITION)"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"(Z&nbsp;POSITION)"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br /><br />***&nbsp;</span><span class="syntaxdefault">There&nbsp;will&nbsp;be&nbsp;many&nbsp;more&nbsp;nodes&nbsp;but&nbsp;this&nbsp;is&nbsp;the&nbsp;layout&nbsp;</span><span class="syntaxkeyword">for&nbsp;</span><span class="syntaxdefault">one&nbsp;node<br />each&nbsp;extra&nbsp;node&nbsp;will&nbsp;be&nbsp;from&nbsp;</span><span class="syntaxkeyword"><</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;</span><span class="syntaxdefault">to&nbsp;</span><span class="syntaxkeyword"></</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">><br /><br /></span><span class="syntaxdefault">all&nbsp;text&nbsp;arrows&nbsp;in&nbsp;sketchup&nbsp;will&nbsp;be&nbsp;named&nbsp;node&nbsp;</span><span class="syntaxkeyword">and&nbsp;</span><span class="syntaxdefault">all&nbsp;saved&nbsp;in&nbsp;the&nbsp;same&nbsp;group</span><span class="syntaxkeyword">***<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">spline</span><span class="syntaxkeyword">>&nbsp;<br /><br />***&nbsp;</span><span class="syntaxdefault">at&nbsp;this&nbsp;point&nbsp;another&nbsp;group&nbsp;will&nbsp;be&nbsp;exported&nbsp;using&nbsp;the&nbsp;same&nbsp;framework&nbsp;above&nbsp;but&nbsp;with&nbsp;different&nbsp;node&nbsp;positions<br /><br /></span><span class="syntaxkeyword"></</span><span class="syntaxdefault">model</span><span class="syntaxkeyword">>&nbsp;</span><span class="syntaxdefault"></span>

heres is a full example of a simple working file to show how the extra nodes and groups would form the file

<span class="syntaxdefault"></span><span class="syntaxkeyword"><</span><span class="syntaxdefault">model&nbsp;xmlns</span><span class="syntaxkeyword">=</span><span class="syntaxstring">""</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">system&nbsp;handedness</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"right"&nbsp;</span><span class="syntaxdefault">up</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"z"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">spline&nbsp;name</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"right"&nbsp;</span><span class="syntaxdefault">cyclic</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0"</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">position&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlPrev&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlNext&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">position&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlPrev&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlNext&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">spline</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">spline&nbsp;name</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"left"&nbsp;</span><span class="syntaxdefault">cyclic</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0"</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">position&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlPrev&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlNext&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">position&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlPrev&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<</span><span class="syntaxdefault">controlNext&nbsp;x</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.5"&nbsp;</span><span class="syntaxdefault">y</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"-2.0"&nbsp;</span><span class="syntaxdefault">z</span><span class="syntaxkeyword">=</span><span class="syntaxstring">"0.75"</span><span class="syntaxkeyword">/>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">node</span><span class="syntaxkeyword">>&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;</</span><span class="syntaxdefault">spline</span><span class="syntaxkeyword">>&nbsp;<br /></</span><span class="syntaxdefault">model</span><span class="syntaxkeyword">>&nbsp;</span><span class="syntaxdefault"></span>

if anybody could create this that would be amazing and save me ( and a lot of others ) a lot of time

thankyou for reading this