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Script variable error

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GeorgeR
Posts: 18
As a map script, this produces an incorrect result. Change r to 3 in the remapSample function to see what it should look like. Using FF 3.0.

Code

r = 3

function prepare()
end;

function remapSample(x, y)
   return (x * r) % 1, (y * r) % 1
end;

function get_sample(x, y)
   r, g = remapSample(x, y)
   return r, g, 0
end;
Posted: November 15, 2011 8:53 pm   Details E-Mail
Dmitry Sapelnikov
Filter Forge, Inc. AKA Egret
Posts: 76
Filters: 5
Declare the r and g variables in get_sample() as local.
The get_sample() function doesn't work well because it accidentally overrides the global r variable.

The original code:
Code
function get_sample(x, y)
   // here you rewrite the global r = 3
   r, g = remapSample(x, y)
   return r, g, 0
end;


The fixed code:
Code
function get_sample(x, y)
   // this will work correctly
   local r, g = remapSample(x, y)
   return r, g, 0
end;
Posted: November 16, 2011 2:19 am   Details E-Mail

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