<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi, when I was briefly fighting with springs last year, I used the attached files to visualise the spring behaviour. It runs the spring with hardcoded values, dumps data into a text file, and renders it with gnuplot. Usage: $ sh spring.c But before using, one should make sure the spring code copied there is up-to-date with weston. By tweaking <a href="http://plot.gp" target="_blank">plot.gp</a> to draw a reference curve and current curve, and copying data.txt to another name, you can compare how changing parameters affects the behaviour. </blockquote><div> Interesting, thanks pq. I've been using compiz wobbly as a visualization to see how such a spring model behaves. </div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Btw. could you do with a single spring instead of x and y springs? I assume you want to interpolate a straight path? Separate x,y springs will probably make some curves, don't know if that's intentional. </blockquote></div> Probably would make things better, though I'm sure how this would work exactly.