triangle.md

Provides work with triangle.

struct Triangle(T) if( isFloatingPoint!T )

aliases:

• alias Vector!(3,T,"x y z") vectype

fields:

• vectype[3] pnt

const properties:

• vectype perp() - perpendicular calced as cross mul of segments [p0 to p1] and [p0 to p2]
• vectype norm() - perp.e
• T area() - perp.len / 2 - area of triangle
• vectype center() - center point

const methods:

• Triangle!T tr(X)( in Matrix!(4,4,X) mtr ) - transform all 3 points of triangle with transform matrix mtr

• Segment!(T)[3] toSegments() -- return segments [p0 to p1], [p1 to p2], [p2 to p0]

• Segment!T altitude( in vectype pp ) - return altitude to point from triangle plane

• Segment!T project(F)( in Segment!F seg ) - return projection of seg to triangle plane

• vectype intersect(F)( in Segment!F seg ) - return interseciont of seg with triangle plane