add circle noise

This commit is contained in:
Yongwei Xing 2021-03-17 16:29:20 +08:00
parent f602dda48a
commit dd0fb2f4d7
5 changed files with 139 additions and 22 deletions

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@ -29,8 +29,8 @@
- [Noise Line](#noise-line) - [Noise Line](#noise-line)
- [Dot Line](#dot-line) - [Dot Line](#dot-line)
- [Ocean Fish](#ocean-fish) - [Ocean Fish](#ocean-fish)
- [Silk Smoke](#silk-smoke)
- [Circle Loop](#circle-loop) - [Circle Loop](#circle-loop)
- [Circle Noise](#circle-noise)
- [Julia Set](#julia-set) - [Julia Set](#julia-set)
- [Silk Sky](#silk-sky) - [Silk Sky](#silk-sky)
- [Circle Move](#circle-move) - [Circle Move](#circle-move)
@ -70,6 +70,7 @@ This package is still working in progress. More types would be added. Welcome an
- Pixel Hole - Pixel Hole
- Dots Wave - Dots Wave
- Circle Move - Circle Move
- Circle Noise
For these kinds of art, the package provides as many parameters to control the appearance. For these kinds of art, the package provides as many parameters to control the appearance.
@ -105,6 +106,7 @@ NewCircleLoop2(depth int)
NewPixelHole(dotN int) NewPixelHole(dotN int)
NewDotsWave(dotsN int) NewDotsWave(dotsN int)
NewCircleMove(circleNum int) NewCircleMove(circleNum int)
NewCircleNoise(dotsN, colorMin, colorMax int)
``` ```
## Docs ## Docs
@ -378,26 +380,6 @@ func main() {
![](images/oceanfish.png) ![](images/oceanfish.png)
### Silk Smoke
```go
func main() {
rand.Seed(time.Now().Unix())
c := generativeart.NewCanva(500, 500)
c.SetBackground(common.Black)
c.SetLineWidth(1.0)
c.SetLineColor(common.MediumAquamarine)
c.SetAlpha(30)
c.SetColorSchema(common.Plasma)
c.SetIterations(4)
c.FillBackground()
c.Draw(arts.NewSilkSmoke(400, 20, 0.2, 2, 10, 30, false))
c.ToPNG("silksmoke.png")
}
```
![](images/silksmoke.png)
### Circle Loop ### Circle Loop
```go ```go
@ -417,6 +399,24 @@ func main() {
![](images/circleloop.png) ![](images/circleloop.png)
### Circle Noise
```go
func main() {
rand.Seed(time.Now().Unix())
c := generativeart.NewCanva(500, 500)
c.SetBackground(common.White)
c.SetAlpha(80)
c.SetLineWidth(0.3)
c.FillBackground()
c.SetIterations(400)
c.Draw(arts.NewCircleNoise(2000, 60, 80))
c.ToPNG("circlenoise.png")
}
```
![](images/circlenoise.png)
### Julia Set ### Julia Set
```go ```go

86
arts/circlenoise.go Normal file
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@ -0,0 +1,86 @@
package arts
import (
"github.com/fogleman/gg"
"github.com/jdxyw/generativeart"
"github.com/jdxyw/generativeart/common"
"math"
"math/rand"
)
type circleNoise struct {
dotsN int
colorMin, colorMax int
}
type dot struct {
x, y float64
prevx, prevy float64
theta float64
count int
}
func NewCircleNoise(dotsN, colorMin, colorMax int) *circleNoise {
return &circleNoise{
dotsN: dotsN,
colorMin: colorMin,
colorMax: colorMax,
}
}
// Generative draws a circle with perlin noise.
func (cn *circleNoise) Generative(c *generativeart.Canva) {
ctex := gg.NewContextForRGBA(c.Img())
ctex.SetLineWidth(2.0)
ctex.SetColor(common.Black)
radius := float64(c.Width()) * 0.8 / 2
ctex.DrawCircle(float64(c.Width()/2), float64(c.Height()/2), radius)
ctex.Stroke()
//ctex.Clip()
var factor = 0.008
noise := common.NewPerlinNoise()
dots := make([]dot, 0)
for i := 0; i < cn.dotsN; i++ {
theta := rand.Float64() * math.Pi * 2
x, y := float64(c.Width())/2+math.Sin(theta)*radius, float64(c.Height())/2+math.Cos(theta)*radius
dots = append(dots, dot{
theta: theta,
x: x,
y: y,
prevx: x,
prevy: y,
count: 0,
})
}
for j := 0; j < c.Opts().NIters(); j++ {
for i, _ := range dots {
n := noise.Noise2D(dots[i].x*factor, dots[i].y*factor)
nx, ny := math.Cos(n*math.Pi*2+float64(dots[i].count)*math.Pi)*2, math.Sin(n*math.Pi*2+float64(dots[i].count)*math.Pi)*2
dots[i].prevx, dots[i].prevy = dots[i].x, dots[i].y
dots[i].x, dots[i].y = dots[i].x+nx, dots[i].y+ny
hsv := common.HSV{
H: int(common.Remap(n, 0, 1, float64(cn.colorMin), float64(cn.colorMax))),
S: 100,
V: 20,
}
if common.Distance(float64(c.Width())/2, float64(c.Height())/2, dots[i].x, dots[i].y) > radius+2 {
dots[i].count += 1
}
if common.Distance(float64(c.Width())/2, float64(c.Height())/2, dots[i].x, dots[i].y) < radius &&
common.Distance(float64(c.Width())/2, float64(c.Height())/2, dots[i].prevx, dots[i].prevy) < radius {
ctex.SetLineWidth(c.Opts().LineWidth())
rgb := hsv.ToRGB(100, 100, 100)
rgb.A = uint8(c.Opts().Alpha())
ctex.SetColor(rgb)
ctex.DrawLine(dots[i].prevx, dots[i].prevy, dots[i].x, dots[i].y)
ctex.Stroke()
}
}
}
}

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@ -176,3 +176,13 @@ cm := generativeart.NewCircleMove(1000)
``` ```
![](../images/circlemove.png) ![](../images/circlemove.png)
### Circle Noise
### parameters
- dotsN: The number of dot.
- colorMin: The minimum color.
- colorMax: The maximum color.
![](../images/circlenoise.png)

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@ -0,0 +1,21 @@
package main
import (
"github.com/jdxyw/generativeart"
"github.com/jdxyw/generativeart/arts"
"github.com/jdxyw/generativeart/common"
"math/rand"
"time"
)
func main() {
rand.Seed(time.Now().Unix())
c := generativeart.NewCanva(500, 500)
c.SetBackground(common.White)
c.SetAlpha(80)
c.SetLineWidth(0.3)
c.FillBackground()
c.SetIterations(400)
c.Draw(arts.NewCircleNoise(2000, 60, 80))
c.ToPNG("circlenoise.png")
}

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