Spline Editor

[chronozphere]

Hey guys,

It's been a while since I last worked on a Pascal project, but it's about time I start something new again. This project involves building a WYSIWYG spline editor that I will use for TubeRunner (Which I really hope to finish in October this year). Features include:

> WYSIWYG editing by dragging handles (done)
> Move/Zoom camera with mouse (done)
> Switch between views (top/side/front)... yes It's a 3D spline.
> Click on spline to create a new anchor
> Manual editing of coordinates & tangents
> Load/Save the spline to an XML

Screenshot:



This is my first project done in Lazarus (It won't work on Delphi). I must say that I'm really impressed with Lazarus, allthough there are some small points where delphi still excells.

The good thing is that this program is a general purpose spline editor, so anyone can use it. Therefore I will donate the source to the community under some very non-restrictive license.

I did most of the work yesterday and I made a lot of progress. I will probably finish it in 2 weeks.

[paul_nicholls]

Looking good mate

cheers,
Paul

[User137]

Looks nice. My personal favorite though are splines that go through the points, using next ones in the route as control points. It's propably called Catmull-rom.

And there it was: http://www.pascalgamedevelopment.com...ll=1#post38234

[chronozphere]

Yes I know how to draw those too. This program will be use Bezier-splines because I found them to be most effective for tunnels used in race-games. Feel free to extend the program to support Catmull-Rom splines, once I have published the source.

[code_glitch]

Nice indeed, I may even in fact have a use for this one, and that isn't something I can say about most of the stuff on my HDD, or even in my life. Sweet. It saves into XML right? Any chance of CSV? With my coming up with a XML parsing system almost from the ground up I'm trying to avoid it like the plague for now

[chronozphere]

It doesn't do much yet, but I'm planning on XML import/export. I keep the export functionality separated from the rest of my code, so you can easily add CSV support yourself.

You can now drag a "handle" to the side of the screen and it will start scrolling in that direction. Very handy when working on large splines with loads of detail.

Update: Just made the entire view menu functional. You can switch between XY, YX and XZ view-planes, zoom in/out, show/hide the tangents and reset the camera of the viewport. If I can keep going at this rate, I will be done next weekend.