canvas

package module

v0.0.0-...-0fbd57b Latest Latest Go to latest Published: Dec 1, 2013 License: GPL-2.0 Imports: 4 Imported by: 1

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my simple canvas implementation with DrawLine and stuff. initial code and ideas from @felixpalmer.

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type Canvas struct {
	image.RGBA
}

func NewCanvas(r image.Rectangle) *Canvas

func (c Canvas) Blur(radius int, weight WeightFunction)

effects

func (c Canvas) BlurPixel(x, y, radius int, weight WeightFunction) color.Color

func (c Canvas) Clone() *Canvas

func (c Canvas) DrawCircle(color color.RGBA, center Vector, radius int)

func (c Canvas) DrawGradient()

func (c Canvas) DrawLine(col color.RGBA, from, to Vector)

func (c Canvas) DrawRect(col color.RGBA, from, to Vector)

func (c Canvas) DrawSpiral(col color.RGBA, where Vector)

type Vector struct {
	X, Y float64
}

func (v1 *Vector) Add(v2 *Vector) Vector

func (v *Vector) Length() float64

func (v *Vector) Rotate(angle float64)

func (v *Vector) Scale(a float64)

func (v *Vector) ScaleVector(v2 *Vector)

func (v Vector) String() string

func (v1 *Vector) Sub(v2 *Vector) Vector

type WeightFunction interface {
	Weight(x int, y int) float64
}