Geometrical Display

The display of 2D and 3D gemoetrical data structures is handelled automatically in an object oriented manner with standard colours used for the display of each geometrical entity using the function

void    geom_col_draw(Tv * tv, void *geom, int type)

The colours used are

POINT2 == blue
LINE2  == baby_blue
CONIC2 == cyan
POINT3 == blue
LINE3  == baby_blue
CONIC3 == cyan
PLANE  == magenta

However, if alternative colours are required in order to display quantitative results from algorithms this default can be over-ridden by attaching a Graphic data structure to the geometric feature's property list.