These variables control the default (initial) values for most graphics parameters including sizes of markers, arrows, line width and so on. As any other settings these ones will influence only on plots created after the settings change.
val ¶mglGraph: void SetBarWidth ( mreal val) ¶void mgl_set_bar_width (HMGL gr, mreal val) ¶Sets relative width of rectangles in bars, barh, boxplot, candle, ohlc. Default value is 0.7.
val ¶mglGraph: void SetMarkSize (mreal val) ¶void mgl_set_mark_size (HMGL gr, mreal val) ¶Sets size of marks for 1D plotting. Default value is 1.
val ¶mglGraph: void SetArrowSize (mreal val) ¶void mgl_set_arrow_size (HMGL gr, mreal val) ¶Sets size of arrows for 1D plotting, lines and curves (see Primitives). Default value is 1.
val ¶mglGraph: void SetMeshNum (int val) ¶void mgl_set_meshnum (HMGL gr, int num) ¶Sets approximate number of lines in mesh, fall, grid2, and also the number of hachures in vect, dew, and the number of cells in cloud, and the number of markers in plot, tens, step, mark, textmark. By default (=0) it draws all lines/hachures/cells/markers.
val ¶mglGraph: void SetFaceNum (int val) ¶void mgl_set_facenum (HMGL gr, int num) ¶Sets approximate number of visible faces. Can be used for speeding up drawing by cost of lower quality. By default (=0) it draws all of them.
'id' ¶mglGraph: void SetPlotId (const char *id) ¶void mgl_set_plotid (HMGL gr, const char *id) ¶Sets default name id as filename for saving (in FLTK window for example).
mglGraph: const char * GetPlotId () ¶const char * mgl_get_plotid (HMGL gr) ¶ mgl_get_plotid (long gr, char *out, int len) ¶Gets default name id as filename for saving (in FLTK window for example).