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[Mathias 'cylab' Henze]

I need a mass spring resolver (specifically a system to connect a regular grid of nodes with springs with different spring cooefficients). I need it for the new terrain implementation for texture parameterization, so if anybody has one or is familar with the math, I would appreciate any help.

Mathias

[Marvin Fröhlich]

I need a mass spring resolver (specifically a system to connect a regular grid of nodes with springs with different spring cooefficients). I need it for the new terrain implementation for texture parameterization, so if anybody has one or is familar with the math, I would appreciate any help.

This is physics stuff, isn't it? You could ask the JOODE guys on JGO.

Marvin

['n ddrylliog]

I need a mass spring resolver (specifically a system to connect a regular grid of nodes with springs with different spring cooefficients). I need it for the new terrain implementation for texture parameterization, so if anybody has one or is familar with the math, I would appreciate any help.

Either I don't understand exactly what you mean, or it's really easy. What about several steps where you apply each constraint one after another ? IIRC, it's called relaxation. It's so simple and yet efficient with several timesteps.

[Mathias 'cylab' Henze]

Do you have any links? Unfortunately I am just moving text data from A to B at work, so I am a bit dull-witted on numerical algorithms.

What I really need is texture coordinate generation based on a flattened terrain mesh respecting the faces surface size. Somehing like this: http://www.cs.princeton.edu/gfx/proj/reparam/reparam.ppt, but only for a regular heightfield grid to optimize surface texture coordinates to prevent texture blurring for steep areas (due to the otherwise linear texture projection from the top)

There are some papers that suggest using mass spring simulation, to calculate the parameterizised mesh, so it seems to have the least math involved Any help will be appreciated. Ready to use code will be preferred

['n ddrylliog]

OK no problem at all.

I've always been interested in springs systems (well, in physics in general).
The problem is at the moment I'm working on :
- An out-of-the-box deployment system for Xith3D apps (compiles latest Xith3D+Xith-tk+Any libs you use, including natives from latest SVN directly in Eclipse)
- XPAL (Physics Layer)

EDIT : I realize this messages sounded like I didn't wanted to do that. That's wrong I'll make a small test today with springs and cosntraint (basic idea : you have "points" connected by "springs" and additionnally some points can be "fixed").

['n ddrylliog]

Oh, and sorry, I haven't forgotten but still have work..