Hi Mark, I can think of 2 ways to improve the speed off-hand. First, you could use the iterator as you're doing now, but instead of having nested iterators, have your original iterator but get it to draw all of the Z steps in one go with a big bunch of patches. It's messy and a lot of work, but it does work out much faster as it's generally the iteration count that kills performance.
The other way would be to run the formula inside a shader (CI filter or GLSL) and generate your wave image that way. That would remove the need for the original iterator. You can then just run X copies of the shader, or just duplicate the texture if you're not modifying the line as you duplicate on z. Oh, a possible 3rd way: use a GLSL shader with a GLSL grid, and use the formula in the vertex shader to deform the mesh. Then you would have a fragment shader that draws pixels as either transparent or solid depending on x/y position to draw your lines.. it'd give you a 3d wavy lines effect in one (pretty fast too) step. Chris 2008/12/8 Mark Harris <[EMAIL PROTECTED]> > Hi, I've created a patch which generates a line which forms a sine wave, > well a mix of four waves which generate interference patterns. The idea was > the duplicate these along the z axis to create a wave effect... problem is I > made the basic shape by using the basic line within a inside an iterator > and i have to have the copies set to about 50 to get a smooth wave effect. > Then when I duplicate then to make a grid it slows things down to a crawl, > about 15-fps.... I was wondering if there was a more efficient was of > generating a sine wave on line??? > any ideas welcome. thanks Mark > > > *Fluid* > > Fluid Studios, 12 Tenby Street, Birmingham B1 3AJ > > Tel: +44 (0) 121 212 0121 Fax: +44 (0) 121 212 0202 > > E-mail: [EMAIL PROTECTED] Web: http://www.fluidesign.co.uk > > > ___________________________________________________ > > > All concepts/images included in this electronic mail remain (c) copyright > of > > Fluid Graphic Designs Ltd T/A Fluid 2008. > > > Privileged, confidential and/or copyright information may be contained In > > this email, and is only for the use of the intended addressee. To copy, > > forward, disclose or otherwise use it in any way if you are not The > intended > > recipient or responsible for delivering to him/her is prohibited. If you > > receive this in error, please contact the sender and delete the material > > from any Computer. > > ___________________________________________________ > > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/psonice%40gmail.com > > This email sent to [EMAIL PROTECTED] >
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