BenCello

I am drawing a graph in a jitter window, using jit.gl.sketch. And I have a lot of bezier curves to add and render. The graph is actually growing with time so I have more and more bezier curves.

I monitored MaxMSP with Shark and saw that the bspl_to_points method is very CPU expensive. I guess it is the method which allows to render bezier curves.

I don't need a very precise rendering and I actually don't really need 3D either but I use it to be able to zoom and move in the graph...

I am drawing a graph in a jitter window, using jit.gl.sketch. And I have a lot of bezier curves to add and render. The graph is actually growing with time so I have more and more bezier curves.
I monitored MaxMSP with Shark and saw that the bspl_to_points method is very CPU expensive. I guess it is the method which allows to render bezier curves.
Is there any way to make it lighter ?
I don't need a very precise rendering and I actually don't really need 3D either but I use it to be able to zoom and move in the graph...

bezier-curves

I don't know the bspl_to_points function, but if it has some kind of density paramter it might help: Drawing short lines instead of huge amounts of points.

@displaylist 1 in your jit.gl.sketch might help, assuming the geometry doesn't change much.

It looks like the stroke implementation hasn't been fully documented.Sorry about that. In the meantime the best example is js_jitterspline-example.maxpat

You can reduce the resolution of your stroked curve with strokeparam slices .

This and Rob's suggestion about @displaylist should help.

You can reduce the resolution of your stroked curve with strokeparam slices . 

This and Rob's suggestion about @displaylist should help. 

I already knew about the @displaylist. And it's set to 1 in every jit.gl.sketch I have.

However, I didn't know about the slice parameter and that may be really efficient as I really don't need a "nice" rendering here but just a rough visualization of a graph. Thx Joshua !

I'll give a try (and have a look to js_jitterspline-example) and let you know.

Thank's a lot for all your replies.
I already knew about the @displaylist. And it's set to 1 in every jit.gl.sketch I have.
However, I didn't know about the slice parameter and that may be really efficient as I really don't need a "nice" rendering here but just a rough visualization of a graph. Thx Joshua !

I reduced the number of slices to 6 and it's much better now (in shark).

Is the default value for "strokeparam slices" in 

 the same as in js_jitterspline-example (ie 20) ?

I reduced the number of slices to 6 and it's much better now (in shark).
Thank's again.
Is the default value for "strokeparam slices" in [jit.gl.sketch] the same as in js_jitterspline-example (ie 20) ?

Bezier Curves