add doc.md

README.md

@@ -31,7 +31,7 @@ For these kinds of art, the package provides as many as parameters to control th
 
 ## Install
 
-The go version I used is go 1.16.
+The go version I used is `Go 1.16`.
 
 ```bash
 go get github.com/jdxyw/generativeart
@@ -57,6 +57,13 @@ NewColorCircle2(circleNum int)
 NewCircleGrid(circleNumMin, circleNumMax int)
 ```
 
+## Docs
+
+You could find the docs in the [doc](./docs).
+
+## Examples
+
+You could find examples for all types under [example](./example).
 ## General Options
 
 ```go
@@ -73,7 +80,7 @@ type Options struct {
 
 The `Options` is a global option for the whole `canva`. It includes those general parameters used by different kinds of types, such as `background`, `lineColor`, and `colorScheme`.
 
-For those parameters specified for different kinds of art type, they have their own `struct`.
+For those parameters specified for different kinds of art types, they have their own `struct`.
 ## Usage and example
 
 ### Junas
@@ -115,7 +122,7 @@ func main() {
 
 ![](images/randomshape.png)
 
-### Color Circle
+### Color Circle2
 
 ```go
 func main() {

docs/doc.md

@@ -0,0 +1,87 @@
+## Color Circle 2
+
+`Color Circle2` is version 2 of `Color Circle`. It still draws circle and point cloud.
+
+### parameters
+
+- circleNum: The number of circle in this drawing.
+
+```go
+cc := generativeart.NewColorCircle2(30)
+```
+
+![](../images/colorcircle2.png)
+
+## Dot Line
+
+`dot line` would draw images with short dot and short. The short lines would compose as a big circle.
+
+### parameters
+
+- n: The number of element in this image.
+- ras/canv: Control the appearance of this image.
+- randColor: Use the the specified color or random colors.
+
+```go
+dl := generativeart.NewDotLine(100, 20, 50, false)
+```
+
+![](../images/dotline.png)
+
+## Random Shape
+
+`random shape` would draw images with random shapes. The whole image would rotate with some degree.
+
+### parameters
+
+- shapeNum: It indicates how many shapes you want to draw.
+
+```go
+rs := NewRandomShape(150)
+```
+
+![](../images/randomshape.png)
+
+## Janus
+
+`Janus` would draws a image with multiple circles split at its center with random noise in the horizontal direction.
+
+### TODO
+
+### parameters
+
+## Silk Sky
+
+`Silk Sky` would draws a image with multiple circles converge to one point or circle. 
+
+### parameters
+
+- circleNum: The number of the circles in this drawing.
+- sunRadius: The radius of the sun. The sun is a point/circle where other circles meet.
+
+```go
+silkSky := NewSilkSky(circleNum int, sunRadius float64)
+```
+
+![](../images/silksky.png)
+
+## Julia
+
+`Julia` is to draw a `Julia Set`. [Julia Set](https://en.wikipedia.org/wiki/Julia_set) is a math concept. You can define your own formula in this package.
+
+### parameters
+
+- fn: The custom julia set function.
+- maxz: The maximum modulus length of a complex number.
+- xaixs, yaixs: The range for the X-Y coordination used to mapping the julia set number to the real pixel of the image. These should be positive number. It only indicates the first quadrant range.
+
+```go
+func julia1(z complex128) complex128 {
+	c := complex(-0.1, 0.651)
+	z = z*z + c
+	return z
+}
+julia := generativeart.NewJulia(julia1, 40, 1.5, 1.5)
+```
+
+![](../images/julia.png)