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Mar
1
revised Problem with creating a large list of tuples
deleted 2 characters in body
Mar
1
comment Problem with creating a large list of tuples
Good point @Mr.Wizard. Oh, and congratulations on passing 50k!
Mar
1
answered Problem with creating a large list of tuples
Feb
28
comment Showing a rectangular plot on an almost-closed sphere
@whuber, true. The static image (with k = 3) shows a correct projection I think, since the plot ranges from -3 to 3 in both directions. The idea with the animation was to show a gradual transition from the plane to the sphere, as if the page was curling up.
Feb
27
answered Showing a rectangular plot on an almost-closed sphere
Feb
27
answered How can I fill a wire-frame structure with gas in a Graphics3D drawing?
Feb
26
comment Showing a rectangular plot on an almost-closed sphere
What mapping are you using from the plane to the sphere? Perhaps you could show the successful result for step 3.
Feb
26
comment Dynamic graphics are less responsive inside a Manipulate
Thanks for your extra work on this, Michael, very useful.
Feb
26
accepted Dynamic graphics are less responsive inside a Manipulate
Feb
23
awarded  graphics
Feb
22
comment Problem with ContourPlot3D
Regarding your penultimate question, eq only becomes 2x-y==0 when it is evaluated. Before evaluation eq has head Symbol (and 2x-y==0 has head Equal). ContourPlot3D has the HoldAll attribute, so eq is passed to it in unevaluated form. My guess is that when ContourPlot3D tests its first argument to see if it's of the form a==b, it does so without evaluating it, and so ends up treating eq as a numerical function rather than an equality. Certainly a Trace shows eq being sampled at various points in the volume (almost all of which evaluate to False of course).
Feb
22
comment Subdividing a polygon , equivalent fractions
@jVincent, good point. Tom's original code uses equal angular divisions and I unthinkingly copied that but with the spoke radius changed.
Feb
22
revised Subdividing a polygon , equivalent fractions
added 11 characters in body
Feb
22
answered Subdividing a polygon , equivalent fractions
Feb
19
comment Dynamic graphics are less responsive inside a Manipulate
@MichaelE2, in this case I think Mike made the answer a community wiki simply because it was a combined effort to find a solution. I think your answer adds some interesting ideas about the cause of the problem, so I would leave it as it is.
Feb
18
comment Dynamic graphics are less responsive inside a Manipulate
@MikeHoneychurch, your definition of vrf together with Rojo's idea looks like the right way to do it. Thanks very much for your help.
Feb
18
comment Dynamic graphics are less responsive inside a Manipulate
@Rojo, you've nailed it - moving the Dynamic outside the PointSize makes all the difference. I have no idea why, I find this dynamic stuff very confusing.
Feb
18
comment Dynamic graphics are less responsive inside a Manipulate
@halmir, I need the highlighting to happen on both the vertex and the popup when the mouse is over either of them. Hence the need for a symbol to hold the current mouseover state.
Feb
18
comment Dynamic graphics are less responsive inside a Manipulate
Thanks Michael, moving the Dynamic outside PointSize was Rojo's suggestion too, and it seems to be the key to getting decent performance.
Feb
17
comment Dynamic graphics are less responsive inside a Manipulate
@kguler, I can't use DynamicModule as that stops the highlighting working properly (the graph vertex fails to highlight when you put the mouse over the popup window). But it's interesting that Set makes such a difference. I'll have to play with it a bit more tomorrow, it's late here and I'm tired... Thanks for your help.