JAVAFX Rendering

[nataraja gadikota]

Hi ,
I'm looking for a Java based solution for my canvas problem
TCL/TK is not able to handle 3million rectangles on a canvas !

https://groups.google.com/forum/?fromgroups=#!topic/comp.lang.tcl/Dxh4KyOOojY

"
Today I had to visualize a huge Data Structure with 146k nodes
and each node is a set of polys/rectangles >20

I've drawn everything on a Canvas , Appximately 3 million objects were created
All my operations Zoom , Scrolling , Moving Objects on this Canvas have become very SLOW

I've tested the code with 100 nodes , everything is working fine at that level
When I increase the DS , I'm looking at these issues .

Any suggestions previous experiences on how to improve the speed ?
"

Can JavaFX , Java/Swing Handle that much data ?


Thanks
Nataraja G

 

[Arne Vajhøj]

I'm looking for a Java based solution for my canvas problem
TCL/TK is not able to handle 3million rectangles on a canvas !

https://groups.google.com/forum/?fromgroups=#!topic/comp.lang.tcl/Dxh4KyOOojY

"
Today I had to visualize a huge Data Structure with 146k nodes
and each node is a set of polys/rectangles >20

I've drawn everything on a Canvas , Appximately 3 million objects were created
All my operations Zoom , Scrolling , Moving Objects on this Canvas have become very SLOW

I've tested the code with 100 nodes , everything is working fine at that level
When I increase the DS , I'm looking at these issues .

Any suggestions previous experiences on how to improve the speed ?
"

Can JavaFX , Java/Swing Handle that much data ?

3 million graphical objects seems like a lot.

But:
- plenty of CPU and RAM
- a 64 bit JVM to utilize the memory
- a GPU that is supported by JavaFX for hardware acceleration
- Java' JIT
then it is probably your best chance for good performance at
this abstraction level.

Arne

 

[Jim Gibson]

Hi ,
I'm looking for a Java based solution for my canvas problem
TCL/TK is not able to handle 3million rectangles on a canvas !

https://groups.google.com/forum/?fromgroups=#!topic/comp.lang.tcl/Dxh4KyOOojY

"
Today I had to visualize a huge Data Structure with 146k nodes
and each node is a set of polys/rectangles >20

I've drawn everything on a Canvas , Appximately 3 million objects were
created
All my operations Zoom , Scrolling , Moving Objects on this Canvas have
become very SLOW

I've tested the code with 100 nodes , everything is working fine at that
level
When I increase the DS , I'm looking at these issues .

Any suggestions previous experiences on how to improve the speed ?

Sounds like you should consider clipping
(<http://en.wikipedia.org/wiki/Clipping_(computer_graphics)>) when you
have zoomed in and showing low-resolution versions of groups of nodes
(if your data consists of node groups in a tree-like structure) when
you are zoomed out (I don't remember the word for this; "greeking" is a
term applied to showing fuzzy blobs for text when the characters are
too small to see clearly).

In other words: don't draw all 3 million nodes, just the ones that
would be visible on the screen. If a group of nodes is too small to be
seen in detail, substitute a low-resolution graphic for the group.

 

[nataraja gadikota]

Hi Arne ,
CPU/GPU/RAM is not a problem
I'm working on huge server's !

with all these do you think I can handle
even 3million is a small number for my application !!
there could be x10 more

Thanks
Nataraja G

 

[nataraja gadikota]

Thanks Jim ,
that's a new idea
I'll try to work it out !

 

[Arne Vajhøj]

CPU/GPU/RAM is not a problem
I'm working on huge server's !

with all these do you think I can handle
even 3million is a small number for my application !!
there could be x10 more

I don't know.

You should measure.

But if the combo above can not do it, then I doubt that any
solution at this abstraction level can do it.

So measure.

If it works then fine.

If it does not work then either:
- go low level with the cost of that
- redefine your solution so you do not need so many gui objects

Arne

 

[nataraja gadikota]

Hi guys !@

Look at my final result
and thanks for the support