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Attempt to perform arithmetic

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CategoryScripting
Created06.08.2013 07:20


Michael Hellmuth (Unknown) 06.08.2013 07:24
Hi There, after programming a lua for a precise seeding machine, where i would like to rotate some parts, i get the error:

Error: LUA running function 'update'
D:/code/lsim2013_desktop/build/finalbin/dataS/scripts/shared/scenegraph.lua(19) : attempt to perform arithmetic on local 'x' (a nil value)

as i read the docu, i can rotate the parts, whithout give em before the coordinates. Or is it need to get the rotation with getRotate() before trying to rotate it?

Here´s the lua:
--

T6Z = {};

function T6Z.prerequisitesPresent(specializations)
return SpecializationUtil.hasSpecialization(SowingMachine, specializations);
end;

function T6Z:load(xmlFile)
self.seedwheel1 = Utils.indexToObject(self.components, getXMLString(xmlFile, "vehicle.seedwheel_1#index"));
self.seedwheel2 = Utils.indexToObject(self.components, getXMLString(xmlFile, "vehicle.seedwheel_2#index"));

end;

function T6Z:delete()
end;

function T6Z:mouseEvent(posX, posY, isDown, isUp, button)
end;

function T6Z:keyEvent(unicode, sym, modifier, isDown)
end;

function T6Z:update(dt)
if self:getIsActive() then
if self.isTurnedOn then
rotate(seedwheel1,2.5,1,1);
rotate(seedwheel2,2.5,1,1);
end;
end;
end;

function T6Z:updateTick(dt)
end;

function T6Z:draw()
end;

print("Script loaded: T6Z.lua");

--
Michael Hellmuth (Unknown) 07.08.2013 06:55
it´s working now. I forgot the self. before the seedwheel1+2 in the update function ... so it is clear that the enginge don´t know what to do

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