plot

Documentation

Overview

Package plot implemants the Fractal Growth algorithm described in The Computational Beauty of Nature by Gary William Flake.

Index

• type Grammar
  • func (g *Grammar) Expand(s string) string
  • func (g *Grammar) Iterate(n int, complexityLimit int) (string, error)
• type Plotter
  • func (p *Plotter) Measure(s string) (float64, float64, float64, float64)
  • func (p *Plotter) Plot(s string, gc draw2d.GraphicContext, x, y float64) error
• type Turtle
  • func NewTurtle(gc draw2d.GraphicContext) *Turtle
  • func (t *Turtle) Bounds() (float64, float64, float64, float64)
  • func (t *Turtle) DrawForward(d float64)
  • func (t *Turtle) GoForward(d float64)
  • func (t *Turtle) MoveTo(x, y float64)
  • func (t *Turtle) RestoreState()
  • func (t *Turtle) Rotate(a float64)
  • func (t *Turtle) RotateTo(h float64)
  • func (t *Turtle) SaveState()
  • func (t *Turtle) SetLineWidth(w float64)

Types

type Grammar

type Grammar struct {
	Seed  string
	Rules map[rune]string
}

func (*Grammar) Expand

func (g *Grammar) Expand(s string) string

func (*Grammar) Iterate

func (g *Grammar) Iterate(n int, complexityLimit int) (string, error)

type Plotter

type Plotter struct {
	InitialAngle   float64
	AngleDelta     float64
	Step           float64
	StepDelta      float64
	LineWidth      float64
	LineWidthDelta float64
}

func (*Plotter) Measure

func (p *Plotter) Measure(s string) (float64, float64, float64, float64)

func (*Plotter) Plot

func (p *Plotter) Plot(s string, gc draw2d.GraphicContext, x, y float64) error

type Turtle

type Turtle struct {
	// contains filtered or unexported fields
}

func NewTurtle

func NewTurtle(gc draw2d.GraphicContext) *Turtle

func (*Turtle) Bounds

func (t *Turtle) Bounds() (float64, float64, float64, float64)

func (*Turtle) DrawForward

func (t *Turtle) DrawForward(d float64)

func (*Turtle) GoForward

func (t *Turtle) GoForward(d float64)

func (*Turtle) MoveTo

func (t *Turtle) MoveTo(x, y float64)

func (*Turtle) RestoreState

func (t *Turtle) RestoreState()

func (*Turtle) Rotate

func (t *Turtle) Rotate(a float64)

func (*Turtle) RotateTo

func (t *Turtle) RotateTo(h float64)

func (*Turtle) SaveState

func (t *Turtle) SaveState()

func (*Turtle) SetLineWidth

func (t *Turtle) SetLineWidth(w float64)