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Index › Programming Questions & Help › Other Libraries › HELP:Jbox2d-custom render through ruby-processing
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HELP:Jbox2d-custom render through ruby-processing (Read 1454 times)
pla
HELP:Jbox2d-custom render through ruby-processing
Oct 15th, 2009, 2:07am  
opened the same in more ruby related area:here
Good day experts,

My goal is simply to change the color , or even better to get the shapes transparent.
As the topic says already: I can’t get the custom rendering method work with ruby-processing.
When I try to override the method I get an error like: become sure that you have an argument “World” in the method.
Now I definded the method simply like this:
def custom_rendering(world)
..stuff
end

Now I think the problem is because in ruby you usually do not type arguments(or I don’t know how to do that) and world is not clearly typed as an World class.
Hope somebody can help me and many thanks in advance.

br
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« Last Edit: Oct 15th, 2009, 1:16pm by pla »  
 
PhiLho 
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #1 - Oct 15th, 2009, 2:48am  
You should ask the question in Processing Implementations, that's where most Ruby-related questions are asked.
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pla
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #2 - Oct 15th, 2009, 3:07am  
kay, i will...do you know if there is another way to change the color instead of the custom rendering ?
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PhiLho 
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #3 - Oct 15th, 2009, 5:07am  
Well, custom rendering is precisely made for that, to change color (or texture, border, etc.).
That's either that, or hack BoxWrap2D's default rendering...
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pla
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #4 - Oct 15th, 2009, 5:34am  
Sure..but why the hack there’s no atribute for that ? would be so extremly easy to just add the color to an shape…
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PhiLho 
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #5 - Oct 15th, 2009, 6:03am  
Well, it is a question of library design...
It is made to be flexible, at the cost of some sweat from the developer: you can do half the shapes of one color, the other half with another color, etc.
Your problem is that setCustomRenderingMethod method takes a method name, then use Java reflection to get the reference of this function.
I don't know if you can make in Ruby a function with the right Java signature.

If you cannot, you can try an alternative (untested!):
- define a class extending Physics;
- override there the method defaultDraw() which takes a World parameter, with your custom rendering routine.
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pla
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #6 - Oct 15th, 2009, 8:27am  
cool man, I will try that.btw:what are you working on right now and for what competition ? just interested Wink
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PhiLho 
Re: HELP:Jbox2d-custom render through ruby-processing
Reply #7 - Oct 15th, 2009, 9:18am  
Oh, the competition has ended, and I didn't won... Smiley
See JavaFX: 3000 Chars for a Crystal Clock for some details.
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