SYMB_MIRRORED in X or Y direction

[Anonymous]

Hi All,

I have a bit of a problem. I have an object that I need to look the same, no matter whether I mirror it in the X or Y direction

In my 2D script I have added the following script, which works well when mirrored over the X axis.

IF SYMB_MIRRORED THEN
MUL2 1,-1
ENDIF

However this will not work if the same object is mirrored in the Y axis instead

Is this a limitation of ArchiCAD, or just my ability

[Laszlo Nagy]

I seem to remember reading this somewhere in GDL documentation.
Basically you create an equation which evaluates to TRUE (1) or FALSE (0). I think it is also possible to create a numeric expression the result of which can be 1 (which will be TRUE) or some other value (which will be FALSE) - I am not totally sure about this part, that a non-1 value will be considered FALSE, so please test this if you use it.
But a simple use of this would be something like

If SYMB_MIRRORED THEN
....
Endif

So you would not have to write

If SYMB_MIRRORED = 1 THEN
....
Endif

This of course works best if the variable is a Boolean Type because its value is then always either TRUE (1) or FALSE (0).

[Anonymous]

laszlonagy wrote:
I seem to remember reading this somewhere in GDL documentation.
Basically you create an equation which evaluates to TRUE (1) or FALSE (0). I think it is also possible to create a numeric expression the result of which can be 1 (which will be TRUE) or some other value (which will be FALSE) - I am not totally sure about this part, that a non-1 value will be considered FALSE, so please test this if you use it.
But a simple use of this would be something like

If SYMB_MIRRORED THEN
....
Endif

So you would not have to write

If SYMB_MIRRORED = 1 THEN
....
Endif

This of course works best if the variable is a Boolean Type because its value is then always either TRUE (1) or FALSE (0).

You are right László.
And generally we don't use for boolen type parameter eg:
SYMB_MIRRORED <> 1 or SYMB_MIRRORED = 0
we used to use:
not(SYMB_MIRRORED)


So the code is more understandable if you use eg SYMB_MIRRORED or not(SYMB_MIRRORED) for boolen type parameters.

[rocorona]

laszlonagy wrote:
I am not totally sure about this part, that a non-1 value will be considered FALSE,

In fact, all non-zero values are TRUE.
It will return a True value for any positive or negative value other than 0.

[Laszlo Nagy]

Thanks for the clarification, Roberto.
I was not sure about that, as I mentioned.
So 0 is FALSE, any other value is TRUE.