Update README

README.md

@@ -13,6 +13,8 @@ generativeart is a `Go` package to generate many kinds of generative art. The co
 - Spiral Square
 - Square Grid
 - Circle Line
+- Circle Loop
+- Silk Sky
 
 For these kinds of art, the package provides as many as parameters to control the appearance. 
 
@@ -22,8 +24,174 @@ For these kinds of art, the package provides as many as parameters to control th
 go get github.com/jdxyw/generativeart
 ```
 
+## Art Type
+
+```go
+NewCircleLine(step float64, lineNum int, radius float64)
+NewCircleLoop(radius float64)
+NewMaze()
+NewRandCicle(mc, msp int, minStep, maxStep, minr, maxr float64, isRandColor bool)
+NewSilkSky(circleNum int, sunRadius float64)
+NewSilkSmoke(mc, msp int, minStep, maxStep, minRadius, maxRadius float64, isRandColor bool)
+NewSpiralSquare(squareNum int, rectSide, decay float64, randColor bool)
+```
+
 ## Usage and example
 
+### Silk Smoke
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(500, 500, 2, 2)
+	c.SetBackground(generativeart.Black)
+	c.SetLineWidth(1.0)
+	c.SetLineColor(generativeart.MediumAquamarine)
+	c.SetAlpha(30)
+	c.SetColorSchema(generativeart.Plasma)
+	c.SetIterations(4)
+	c.FillBackground()
+	c.Draw(generativeart.NewSilkSmoke(400, 20, 0.2, 2, 10, 30, false))
+	c.ToPNG("silksmoke.png")
+}
+```
+
+![](images/silksmoke.png)
+
+### Spiral Square
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(500, 500, 2, 2)
+	c.SetBackground(generativeart.MistyRose)
+	c.SetLineWidth(10)
+	c.SetLineColor(generativeart.Orange)
+	c.SetColorSchema(generativeart.Viridis)
+	c.SetForeground(generativeart.Tomato)
+	c.FillBackground()
+	c.Draw(generativeart.NewSpiralSquare(40, 400, 0.05, true))
+	c.ToPNG("spiralsquare.png")
+}
+```
+
+![](images/spiralsquare.png)
+
+### Circle Loop
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(500, 500, 2, 2)
+	c.SetBackground(generativeart.Black)
+	c.SetLineWidth(1)
+	c.SetLineColor(generativeart.Orange)
+	c.SetAlpha(30)
+	c.SetIterations(1000)
+	c.FillBackground()
+	c.Draw(generativeart.NewCircleLoop(100))
+	c.ToPNG("circleloop.png")
+}
+```
+
+![](images/circleloop.png)
+
+### Julia Set
+
+```go
+func julia1(z complex128) complex128 {
+	c := complex(-0.1, 0.651)
+
+	z = z*z + c
+
+	return z
+}
+
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(500, 500, 1.5, 1.5)
+	c.SetIterations(800)
+	c.SetColorSchema(generativeart.Viridis)
+	c.FillBackground()
+	c.Draw(generativeart.NewJulia(julia1, 40))
+	c.ToPNG("julia.png")
+}
+```
+
+![](images/julia.png)
+
+### Circle Line
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(600, 600, 2, 2)
+	c.SetBackground(generativeart.Tan)
+	c.SetLineWidth(1.0)
+	c.SetLineColor(generativeart.LightPink)
+	c.FillBackground()
+	c.Draw(generativeart.NewCircleLine(0.02, 600, 1.5))
+	c.ToPNG("circleline.png")
+}
+```
+
+![](images/circleline.png)
+
+### Silk Sky
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(600, 600, 1, 1)
+	c.SetAlpha(10)
+	c.Draw(generativeart.NewSilkSky(15, 5))
+	c.ToPNG("silksky.png")
+}
+```
+
+![](images/silksky.png)
+
+### Maze
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(600, 600, 2, 2)
+	c.SetBackground(generativeart.Azure)
+	c.SetLineWidth(3)
+	c.SetLineColor(generativeart.Orange)
+	c.FillBackground()
+	c.Draw(generativeart.NewMaze())
+	c.ToPNG("maze.png")
+}
+```
+
+![](images/maze.png)
+
+### Random Circle
+
+```go
+func main() {
+	rand.Seed(time.Now().Unix())
+	c := generativeart.NewCanva(500, 500, 2, 2)
+	c.SetBackground(generativeart.MistyRose)
+	c.SetLineWidth(1.0)
+	c.SetLineColor(color.RGBA{
+		R: 122,
+		G: 122,
+		B: 122,
+		A: 30,
+	})
+	c.SetColorSchema(generativeart.Plasma)
+	c.SetIterations(4)
+	c.FillBackground()
+	c.Draw(generativeart.NewRandCicle(30, 80, 0.2, 2, 10, 30, true))
+	c.ToPNG("randcircle.png")
+}
+```
+
+![](images/randcircle.png)
+
 ## TODO
 
 - Add more kinds of generative arts or types.

example/example_circleline.go

@@ -8,10 +8,10 @@ import (
 
 func main() {
 	rand.Seed(time.Now().Unix())
-	c := generativeart.NewCanva(800, 800, 2, 2)
+	c := generativeart.NewCanva(600, 600, 2, 2)
 	c.SetBackground(generativeart.Tan)
 	c.SetLineWidth(1.0)
-	c.SetLineColor(generativeart.Lavender)
+	c.SetLineColor(generativeart.LightPink)
 	c.FillBackground()
 	c.Draw(generativeart.NewCircleLine(0.02, 600, 1.5))
 	c.ToPNG("circleline.png")

example/example_gridsquare.go

@@ -9,8 +9,8 @@ import (
 func main() {
 	rand.Seed(time.Now().Unix())
 	c := generativeart.NewCanva(600, 600, 1, 1)
-	c.SetBackground(generativeart.Viridis[rand.Intn(255)])
-	c.SetColorSchema(generativeart.Viridis)
+	c.SetBackground(generativeart.DarkPink[rand.Intn(5)])
+	c.SetColorSchema(generativeart.DarkPink)
 	c.Draw(generativeart.NewGirdSquares())
 	c.ToPNG("gsquare.png")
 }

example/example_julia.go

@@ -16,7 +16,7 @@ func julia1(z complex128) complex128 {
 
 func main() {
 	rand.Seed(time.Now().Unix())
-	c := generativeart.NewCanva(800, 800, 1.5, 1.5)
+	c := generativeart.NewCanva(500, 500, 1.5, 1.5)
 	c.SetIterations(800)
 	c.SetColorSchema(generativeart.Viridis)
 	c.FillBackground()

example/example_maze.go

@@ -8,9 +8,10 @@ import (
 
 func main() {
 	rand.Seed(time.Now().Unix())
-	c := generativeart.NewCanva(800, 800, 2, 2)
+	c := generativeart.NewCanva(600, 600, 2, 2)
 	c.SetBackground(generativeart.Azure)
-	c.SetForeground(generativeart.Tomato)
+	c.SetLineWidth(3)
+	c.SetLineColor(generativeart.Orange)
 	c.FillBackground()
 	c.Draw(generativeart.NewMaze())
 	c.ToPNG("maze.png")

example/example_silksmoke.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"generativeart"
-	"image/color"
 	"math/rand"
 	"time"
 )
@@ -12,12 +11,8 @@ func main() {
 	c := generativeart.NewCanva(500, 500, 2, 2)
 	c.SetBackground(generativeart.Black)
 	c.SetLineWidth(1.0)
-	c.SetLineColor(color.RGBA{
-		R: 255,
-		G: 255,
-		B: 255,
-		A: 30,
-	})
+	c.SetLineColor(generativeart.MediumAquamarine)
+	c.SetAlpha(30)
 	c.SetColorSchema(generativeart.Plasma)
 	c.SetIterations(4)
 	c.FillBackground()

maze.go

@@ -16,7 +16,7 @@ func NewMaze() *maze {
 // Generative draws a random maze image.
 func (m *maze) Generative(c *canva) {
 	ctex := gg.NewContextForRGBA(c.img)
-	ctex.SetColor(c.opts.background)
+	ctex.SetColor(c.opts.lineColor)
 	ctex.SetLineWidth(c.opts.lineWidth)
 	step := c.opts.step
 	for x := 0; x < c.width; x += step {

silksky.go

@@ -22,7 +22,7 @@ func NewSilkSky(circleNum int, sunRadius float64) *silkSky {
 func (s *silkSky) Generative(c *canva) {
 	ctex := gg.NewContextForRGBA(c.img)
 	xm := float64(rand.Intn(c.width/5)) + float64(c.width*4/5-c.width/5)
-	ym := float64(rand.Intn(c.height/5))+ float64(c.height*4/5-c.height/5)
+	ym := float64(rand.Intn(c.height/5)) + float64(c.height*4/5-c.height/5)
 
 	mh := s.circleNum*2 + 2
 	ms := s.circleNum*2 + 50

silksmoke.go

@@ -57,7 +57,7 @@ func (s *sileSmoke) Generative(c *canva) {
 					cx := (c1.x + c2.x) / 2
 					cy := (c1.y + c2.y) / 2
 
-					ctex.SetRGBA255(int(cl.R), int(cl.G), int(cl.B), 30)
+					ctex.SetRGBA255(int(cl.R), int(cl.G), int(cl.B), c.opts.alpha)
 					ctex.SetLineWidth(c.opts.lineWidth)
 
 					ctex.LineTo(c1.x, c1.y)