topic Re: When I use the check script, I get this error. in GDL

When I use the check script, I get this error.

LeeJaeYoung — Sun, 09 Oct 2022 17:55:50 GMT

IF WALL_SKINS_PARAMS[i][6] = 3 THEN

• [6] core status
core status: 0 - not part, 1 - part, 3 - last core skin.

Re: When I use the check script, I get this error.

DGSketcher — Sun, 09 Oct 2022 21:35:02 GMT

This is generated when using = to compare REAL values. It works with INTEGERS but GDL is prone to false results for Real values due to precision.

The usual workaround in your coding is:

EPS = 0.0001 !or some other small value to suit your object

IF ABS (WALL_SKINS_PARAMS[i][6] - 3.00) < eps THEN...

this way if the divergence between values is less the EPS then the result will be TRUE, and any value greater than 3.00 will be FALSE

Re: When I use the check script, I get this error.

LeeJaeYoung — Mon, 10 Oct 2022 01:35:56 GMT

So is this real value?
I understand it as an integer....

Is INT(WALL_SKINS_PARAMS[i][6]) = 3 ok?

Re: When I use the check script, I get this error.

Barry Kelly — Mon, 10 Oct 2022 02:48:37 GMT

You would expect the core to be an integer (0, 1 or 3), but because WALL_SKINS_PARAMS can also tell you the skin thickness, the entire parameter is probably treated as a real number (just my guess).

So the core value (although it may be exactly '3') is also treated as a real number, which means it could have a decimal precision.

You are then trying to compare something that may have a decimal precision with something that does not - hence the message to say "Use of real types can result in precision problems".

In this case it is just a warning and can probably be ignored - you will only see it when checking the script.

Or it is a case of scripting as DGSketcher suggested to allow for a small decimal range (error).

Barry.

Re: When I use the check script, I get this error.

LeeJaeYoung — Mon, 10 Oct 2022 03:44:06 GMT

thank you so much

Re: When I use the check script, I get this error.

Peter Baksa — Fri, 14 Oct 2022 08:34:49 GMT

In this case, when the stored value is surely an integer, round_int might be easier to read.

Re: When I use the check script, I get this error.

DGSketcher — Fri, 14 Oct 2022 09:14:17 GMT

@Peter Baksa Thank you for your guidance. I had forgotten that option. Might need to review some of my coding... 👍