bool ps_setmiterlimit ( resource psdoc, float value )
If two lines join in a small angle and the line join is set to miter, then
the resulting spike will be very long. The miter limit is the maximum
ratio of the miter length (the length of the spike) and the line width.
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.