piechartMP Manual

7 piechartMP InternalsFranceFranceUSAUSA10.6 %11.1 %Great BritainItalyothersGreat BritainItaly8.4 %7.4 %6.2 % 5.1 %51.2 %othersNetherlandsAustriaFrance11.1 %USA10.6 %USANetherlandsAustriaFrance11.1 %10.6 %Great BritainItaly8.4 %7.4 %6.2 % 5.1 %51.2 %othersGreat BritainItaly8.4 %7.4 %6.2 % 5.1 %51.2 %othersNetherlandsAustriaNetherlandsAustriaFranceFranceUSA10.6 %11.1 %USA10.6 %11.1 %Great Britain8.4 %ItalyNetherlands7.4 %6.2 % 5.1 %51.2 %Austriaothers8.4 %51.2 %Great Britain7.4 %6.2 % 5.1 %ItalyNetherlandsAustriaothersFrance11.1 %USA10.6 %8.4 %Great Britain7.4 %Italy5.1 %6.2 %51.2 %othersGreat BritainUSAItaly10.6 %8.4 %NetherlandsFrance7.4 %6.2 %11.1 %5.1 %51.2 %othersNetherlandsAustriaAustria7 piechartMP InternalsThis section describes some internal variables and macros which can be useful when youneed some information about the chart for more advanced graphics.R is a numeric variable containing the radius of the pie-chart, that was specified in PieChart.Thus the variable is only valid after the PieChart command has been used.pc_Centre is a METAPOST variable of type pair which contains the centre of the pie-chart.Normally this is the origin of the METAPOST co-ordinate system, but you can modifythe value in order to place the chart somewhere. It is a matter of course that youshouldn’t change this value between PieChart and the label commands.pc_Count is a numeric variable containing the number of defined segments. For exampleits value can be used in own loops. But even you can set this value to 0 in orderto start a completely new set of segment data. piechartMP defines the macroResetSegments which does exactly this.SegmentPoint(s,sp) is a macro returning a METAPOST pair. The command Label hasa parameter SegmentPoint. If you use this specification as parameter sp and a valid34