affine

Documentation

Overview

Package affine allows for combinations of points where the sum of the coefficients is zero.

Index

• type Center
  • func (c Center) Centroid() d3.Pt
• type Weighted
  • func (af *Weighted) Add(pts ...d3.Pt)
  • func (af *Weighted) Get() d3.Pt
  • func (af *Weighted) Weight(pt d3.Pt, w float64)

Types

type Center

type Center []d3.Pt

Center represents the center of a set of points, all equally weighted

func (Center) Centroid

func (c Center) Centroid() d3.Pt

Centroid returns the average point.

type Weighted

type Weighted struct {
	Pts     []d3.Pt
	Weights []float64
	Sum     float64
}

Weighted allows for each point to be individually weighted before taking the sum.

func (*Weighted) Add

func (af *Weighted) Add(pts ...d3.Pt)

Add many points, all with a weight of 1

func (*Weighted) Get

func (af *Weighted) Get() d3.Pt

Get the current weighted sum.

func (*Weighted) Weight

func (af *Weighted) Weight(pt d3.Pt, w float64)

Weight an individual point