Scale in object representation

Scale is relative to the default size of the symbol, as defined in Symbol Editor - i.e. the size of a new element of that type in a Diagram. If you omit the scale attribute, you'll get the default size. If you want it twice as wide and three times as tall, use scale="2,3".

If you want a particular absolute height and width, you'll need to know the height and width of the default size, and calculate the desired scale from those. I suppose one way is to make a defaultSize.mxm with a single graph called defaultSize, containing an instance and representation of each object type, with no scale supplied. Import that with "internal 'fileInPatch: defaultSize.mxm' execute", then run a generator on it to find the width and height of each element. You can store those in variables, and use them later when calculating the desired scale values. After the import, you probably want to abandon with "internal 'abandon' execute", to avoid saving the temporary defaultSize graph.

/* To get the default sizes and store them in variables */
do graphs where id='defaultSize'
{  foreach .()
    {  variable 'width' type write
           width
         close
    }
}

/* To calculate x scale from $myWidth */
math
   $myWidth    ' / '    variable 'width' type read
evaluate