Module hit 

Hit tests: which Visual a Pointer is over, shared by every operation so a click means the same thing whatever is being edited.

What counts as over something is measured in the pointer’s reach (see super::Reach), so “near” means near on screen however far away or zoomed in the view is. The geometry itself — how near a ray passes to a point, a segment, a triangle — is geop_core_math::primitives::Ray’s.

Structs

VisualHit

A visual the pointer is over.

Constants

HANDLE

A handle’s radius, in reaches; its arrows reach three times as far along its direction.

LABEL

How near a label’s center a click has to land, in reaches.

Functions

hit_visuals

The visual among those accept takes that the pointer is over: handles and labels first, then points, curves and areas — within each, the one nearest the pointer on screen.

nearer

Orders two distances for picking the nearest. Which of two overlapping enclosures is “nearer” is no geometric claim, only which of two things under the pointer to prefer, so their midpoints decide.