Bisector

Bisector constraint can be applied to three linear objects, if the first two linear objects divide the plane into four sectors, and the third object is an axis that divides the selected sector in half. A bisector constraint can be created by the

constraint_item GCE_AddAngleBisector(GCE_system gSys, geom_item l1
                                    , geom_item l2
                                    , geom_item bl
                                    , GCE_bisec_variant variant)

The method has the following initial data:

• gSys is the geometric constraint system;

• l1, l2 are a pair of straight-line objects that divide the plane into sectors;

• bl is a bisector, line or line segment that divides the sector in halves between l1 and l2 lines;

• variant is one of three variants that determine the sector of the bisector:

  • GCE_BISEC_CLOSEST selects one of the bisector sectors based on the relative position of objects in the initial state (see Item Initial Approximation);

  • GCE_BISEC_PLUS means that the bisector divides a sector indicated by the vector sum of the directions l1 and l2;

  • GCE_BISEC_MINUS means that the bisector divides a sector indicated by a vector difference of the directions l1 and l2;

The function returns the descriptor of a constraint declaring that bl is a bisector for a sector formed by the l1 and l2 lines.

Please note that this constraint does not lose its meaning if the lines l1 and l2 do not intersect. In this case, the bisector divides a part of the surface between the lines l1 and l2 in two halves, and it lies on equal distances from these two lines.