Re: Mathematica Graphics - speed bottleneck

*To*: mathgroup at smc.vnet.net*Subject*: [mg97692] Re: [mg97664] Mathematica Graphics - speed bottleneck*From*: "David Park" <djmpark at comcast.net>*Date*: Thu, 19 Mar 2009 02:08:49 -0500 (EST)*References*: <3288260.1237372223411.JavaMail.root@m02>

You don't tell us quite enough about your dynamic presentation. There might, or might not, be a solution within Mathematica. A Graphics3D object that is extremely dense with objects is going to be slow to update. For example, it may be sluggish just in using the mouse to rotate the image. (In examples I tried I was surprised to see that the use of VectorStyle -> "Arrow3D" produced images that seemed easier to rotate than with the simpler default arrows.) If you MUST show many hundreds of objects and they ALL change with some dynamic variable, then there may be no practical solution within Mathematica or on a PC. But if only a few things change, then you could write a custom dynamic presentation where only the few things are updated and that should be much faster. (I hardly ever write Manipulate statements anymore, finding custom dynamics much easier.) We must also recognize that a graphical image with a thousand objects, say, is something that may be difficult for a viewer to grasp or to prevent from being cluttered. It might be possible to use multiple images. One image might be detailed, but non-dynamic. Other images might be dynamic but using a simplified representation that somehow captured the essential changes. It might be possible to dynamically show pairs of images, one that illustrated the configuration of dynamic variables and a second that illustrated the effect at some limited region with a smaller set of objects. Thinking about how to make such presentations might actually lead to a better understanding of the phenomenon. But if everything is dynamic, interconnected, and equally important, then you will probably have a problem with practical real-time presentations in Mathematica. David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ From: robert prince-wright [mailto:robertprincewright at yahoo.com] Mathematica 7. has lured me back into using Mathematica at work and I am wondering if it really has reached a point where it can be used to deploy applications / solutions. I had some success with one small application but found the graphics became a bottleneck which slowed to a grinding halt when applied to a real problem. Key culprits were the vector field plotting functions, and Graphics3D's ability to manipulate objects comprising hundreds of tubes. It was fine for tens but not hundreds. This led me to wonder if there are alternative approaches. I recall LiveGraphics3D but it seems to have stopped at v5. Basically I want to manipulate 3D graphics through use of DynamicModule, Sliders, etc. and see the changes in realtime (as opposed to geological time!) Any thoughts?