exp

Documentation

Index

• Constants
• Variables
• func DrawLineFixPoint(dst draw.Image, from, to fixed.Point26_6, width float64)
• func FixedToFloat(f fixed.Int26_6) float64
• func FloatToFixed(f float64) fixed.Int26_6
• type Binary
  • func (b Binary) Eval(env Env) float64
  • func (b Binary) GetGraphy() Graphy
  • func (b Binary) String() string
• type BinaryGraphy
  • func (b *BinaryGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (b *BinaryGraphy) Measure(fontSize float64) fixed.Point26_6
• type Call
  • func (c Call) Eval(env Env) float64
  • func (c Call) GetGraphy() Graphy
  • func (c Call) String() string
• type DivideGraphy
  • func (d *DivideGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (d *DivideGraphy) Measure(fontSize float64) fixed.Point26_6
• type Env
• type Expr
  • func Parse(input string) (_ Expr, err error)
• type Graphy
• type Literal
  • func (l Literal) Eval(env Env) float64
  • func (l Literal) GetGraphy() Graphy
  • func (l Literal) String() string
• type PowGraphy
  • func (p *PowGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (p *PowGraphy) Measure(fontSize float64) fixed.Point26_6
• type SqrtGraphy
  • func (s *SqrtGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (s *SqrtGraphy) Measure(fontSize float64) fixed.Point26_6
• type TriangleGraphy
  • func (t *TriangleGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (t *TriangleGraphy) Measure(fontSize float64) fixed.Point26_6
• type Unary
  • func (u Unary) Eval(env Env) float64
  • func (u Unary) GetGraphy() Graphy
  • func (u Unary) String() string
• type UnaryGraphy
  • func (u *UnaryGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (u *UnaryGraphy) Measure(fontSize float64) fixed.Point26_6
• type Var
  • func (v Var) Eval(env Env) float64
  • func (v Var) GetGraphy() Graphy
  • func (v Var) String() string
• type VarGraphy
  • func (v *VarGraphy) Draw(dst draw.Image, dot fixed.Point26_6)
  • func (v *VarGraphy) Measure(fontSize float64) fixed.Point26_6

Constants

const DPI = 72.0

Variables

var (
	DefaultFont  *truetype.Font
	DefaultColor *image.Uniform
)

Functions

func DrawLineFixPoint

func DrawLineFixPoint(dst draw.Image, from, to fixed.Point26_6, width float64)

func FixedToFloat

func FixedToFloat(f fixed.Int26_6) float64

func FloatToFixed

func FloatToFixed(f float64) fixed.Int26_6

Types

type Binary

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

func (Binary) Eval

func (b Binary) Eval(env Env) float64

func (Binary) GetGraphy

func (b Binary) GetGraphy() Graphy

func (Binary) String

func (b Binary) String() string

type BinaryGraphy

type BinaryGraphy struct {
	Op   string //"+"  "-" "*"
	X, Y Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*BinaryGraphy) Draw

func (b *BinaryGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*BinaryGraphy) Measure

func (b *BinaryGraphy) Measure(fontSize float64) fixed.Point26_6

type Call

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

func (Call) Eval

func (c Call) Eval(env Env) float64

func (Call) GetGraphy

func (c Call) GetGraphy() Graphy

func (Call) String

func (c Call) String() string

type DivideGraphy

type DivideGraphy struct {
	X Graphy
	Y Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*DivideGraphy) Draw

func (d *DivideGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*DivideGraphy) Measure

func (d *DivideGraphy) Measure(fontSize float64) fixed.Point26_6

type Env

type Env map[Var]float64

---------------------------------------------------------------------------------------------

type Expr

type Expr interface {
	Eval(env Env) float64
	String() string
	GetGraphy() Graphy
}

func Parse

func Parse(input string) (_ Expr, err error)

type Graphy

type Graphy interface {
	Measure(fontSize float64) fixed.Point26_6
	Draw(dst draw.Image, dot fixed.Point26_6)
}

type Literal

type Literal string

---------------------------------------------------------------------------------------

func (Literal) Eval

func (l Literal) Eval(env Env) float64

func (Literal) GetGraphy

func (l Literal) GetGraphy() Graphy

func (Literal) String

func (l Literal) String() string

type PowGraphy

type PowGraphy struct {
	X Graphy
	Y Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*PowGraphy) Draw

func (p *PowGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*PowGraphy) Measure

func (p *PowGraphy) Measure(fontSize float64) fixed.Point26_6

type SqrtGraphy

type SqrtGraphy struct {
	X Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*SqrtGraphy) Draw

func (s *SqrtGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*SqrtGraphy) Measure

func (s *SqrtGraphy) Measure(fontSize float64) fixed.Point26_6

type TriangleGraphy

type TriangleGraphy struct {
	Op string //sin cos tan arcsin ...
	X  Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*TriangleGraphy) Draw

func (t *TriangleGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*TriangleGraphy) Measure

func (t *TriangleGraphy) Measure(fontSize float64) fixed.Point26_6

type Unary

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

--------------------------------------------------------------------------------------

func (Unary) Eval

func (u Unary) Eval(env Env) float64

func (Unary) GetGraphy

func (u Unary) GetGraphy() Graphy

func (Unary) String

func (u Unary) String() string

type UnaryGraphy

type UnaryGraphy struct {
	Op string
	X  Graphy
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*UnaryGraphy) Draw

func (u *UnaryGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*UnaryGraphy) Measure

func (u *UnaryGraphy) Measure(fontSize float64) fixed.Point26_6

type Var

type Var string

--------------------------------------------------------------------------------------

func (Var) Eval

func (v Var) Eval(env Env) float64

func (Var) GetGraphy

func (v Var) GetGraphy() Graphy

func (Var) String

func (v Var) String() string

type VarGraphy

type VarGraphy struct {
	Name string
	// contains filtered or unexported fields
}

----------------------------------------------------------------------------

func (*VarGraphy) Draw

func (v *VarGraphy) Draw(dst draw.Image, dot fixed.Point26_6)

func (*VarGraphy) Measure

func (v *VarGraphy) Measure(fontSize float64) fixed.Point26_6