segment.md

Provides work with segment. It is a point-size pair, where size is a direction vector.

struct Segment(T) if( isFloatingPoint!T );

aliases:

• alias Vector!(3,T,"x y z") vectype

fields:

• vectype pnt - start of segment
• vectype dir - size and direction

properties:

• ref vectype start() - return ref to pnt
• ref const(vectype) start() - return copy of pnt
• vectype end() const - return sum of pnt and dir
• vectype end( in vectype p ) - sets end point and return it
• Segment!T revert() const - swap start and end
• T len2() const - return squared length of dir
• T len() const - return length of dir

static methods:

• static Segment!T fromPoints( in vectype start, in vectype end )

basic math operations:

• seg+seg
• seg-seg
• seg*double
• seg/double

implements by mixin( BasicMathOp!"pnt dir" )

const methods:

• Segment!T tr(X)( in Matrix!(4,4,X) mtr ) - apply transform matrix to copy and return it

• Segment!T altitude( in vectype pp ) - altitude from segment line to point

• Segment!T altitude(F)( in Segment!F seg ) - altitude from this segment line to seg line

• vectype intersect(F)( in Segment!F seg ) - point of intersection of segments lines as altitude pnt + dir * 0.5