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equivalent to rbscript
Posted: Sat May 12, 2012 12:27 pm
by cjmj
Please I would need to know the equivalent to RealBasic Scripts in LiveCode. Because I need to create an app where the user could introduce a mathematical function to plot it.
Thank you in advance
Re: equivalent to rbscript
Posted: Sat May 12, 2012 3:13 pm
by Klaus
Hi cjmj,
I don't think that someone will post a more or less complete comparison chart
RB commands <-> LiveCode commands, so if you could be a bit more specific,
we might be able to help you
And welcome to the forum!
In the meantime you might want to take a look at these stacks:
http://www.runrev.com/developers/lesson ... nferences/
Best
Klaus
Re: equivalent to rbscript
Posted: Sat May 12, 2012 5:25 pm
by cjmj
Thank you Klaus. I want to create in the stack a text entry field, where the user introduce something like that: "y = x^2 -3x +2", then when the user pushes a button, the program draws it.
Re: equivalent to rbscript
Posted: Sat May 12, 2012 7:46 pm
by BvG
You need math to do that, not a specific programming language, for example:
Code: Select all
put field "formula" into theFormula
repeat with x = 1 to 10
put theFormula into theTemporary
replace "x" with x in theTemporary
put x & comma & value(theTemporary) & return after theData
end repeat
-- draw data here using math
Re: equivalent to rbscript
Posted: Sat May 12, 2012 10:18 pm
by cjmj
Thank you BvG, that´s great!, but I don´t understand what you want to say with "math" in this case.
Re: equivalent to rbscript
Posted: Sun May 13, 2012 1:25 pm
by BvG
Screen coordinates are the same as carthesian coordinates (altho inverted because LC starts at the topleft with 0,0). All things that need positioning on (as in precise on a certain point) a carthesian system are algebra. Algebra is math. You do the math.
Re: equivalent to rbscript
Posted: Sun May 13, 2012 2:32 pm
by cjmj
OK BvG, I understand. By the way, is there any example of code of math graphics on carthesian system?, it would be very useful for me to survey it.
Thanks for your kindness
Re: equivalent to rbscript
Posted: Sun May 13, 2012 5:40 pm
by BvG
Re: equivalent to rbscript
Posted: Sun May 13, 2012 9:35 pm
by cjmj
Sorry BvG I would want to say livecode code.
Thanks
Re: equivalent to rbscript
Posted: Sun May 13, 2012 11:26 pm
by BvG
I don't understand then I guess, didn't I say it's math, and not code?
Re: equivalent to rbscript
Posted: Mon May 14, 2012 6:56 am
by dave_probertGA6e24
Hi cjmj,
I think you need to look in the LC dictionary for the references to "points" in the graphic object.
You can assign the points that are generated by your math functions to lines, which will then be drawn.
Code: Select all
set the points of graphic "fred" to myDataPointsList
where myDataPointsList is an array of x,y values.
That should give you a programmatical start to creating graphs of your data.
Cheers,
Dave
Re: equivalent to rbscript
Posted: Mon May 14, 2012 12:48 pm
by cjmj
I think it is just I need.
I´ll take a look to "point" in the Dictionary
Thanks
Carlos