add perlin perls

This commit is contained in:
Yongwei Xing 2021-04-07 17:22:53 +08:00
parent ed10f4403d
commit a8740b437e
10 changed files with 198 additions and 5 deletions

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@ -33,6 +33,7 @@
- [Circle Loop](#circle-loop) - [Circle Loop](#circle-loop)
- [Domain Warp](#domain-warp) - [Domain Warp](#domain-warp)
- [Circle Noise](#circle-noise) - [Circle Noise](#circle-noise)
- [Perlin Perls](#perlin-perls)
- [Color Canva](#color-canva) - [Color Canva](#color-canva)
- [Julia Set](#julia-set) - [Julia Set](#julia-set)
- [Black Hole](#black-hole) - [Black Hole](#black-hole)
@ -83,6 +84,7 @@ This package is still working in progress. More types would be added. Welcome an
- Black Hole - Black Hole
- Color Canva - Color Canva
- Domain Warp - Domain Warp
- Perlin Perls
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.
@ -123,6 +125,7 @@ NewYarn(n int)
NewBlackHole(circleN int, density, circleGap float64) NewBlackHole(circleN int, density, circleGap float64)
NewColorCanve(seg float64) NewColorCanve(seg float64)
NewDomainWrap(scale, scale2, xOffset, yOffset float64, cmap ColorMapping) NewDomainWrap(scale, scale2, xOffset, yOffset float64, cmap ColorMapping)
NewPerlinPerls(circleN, dotsN, colorMin, colorMax int)
``` ```
## Docs ## Docs
@ -460,6 +463,24 @@ func main() {
![](images/circlenoise.png) ![](images/circlenoise.png)
### Perlin Perls
```go
func main() {
rand.Seed(time.Now().Unix())
c := generativeart.NewCanva(500, 500)
c.SetBackground(common.White)
c.SetAlpha(120)
c.SetLineWidth(0.3)
c.FillBackground()
c.SetIterations(200)
c.Draw(arts.NewPerlinPerls(10, 200, 40, 80))
c.ToPNG("perlinperls.png")
}
```
![](../images/perlinperls.png)
### Color Canva ### Color Canva
```go ```go

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@ -18,6 +18,7 @@ type dot struct {
prevx, prevy float64 prevx, prevy float64
theta float64 theta float64
count int count int
cx, cy float64
} }
func NewCircleNoise(dotsN, colorMin, colorMax int) *circleNoise { func NewCircleNoise(dotsN, colorMin, colorMax int) *circleNoise {

123
arts/perlinpearls.go Normal file
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@ -0,0 +1,123 @@
package arts
import (
"github.com/fogleman/gg"
"github.com/jdxyw/generativeart"
"github.com/jdxyw/generativeart/common"
"math"
"math/rand"
)
type perlinPearls struct {
circleN int
dotsN int
colorMin, colorMax int
}
type circles struct {
x, y float64
radius float64
colorMin, colorMax int
}
func NewPerlinPerls(circleN, dotsN, colorMin, colorMax int) *perlinPearls {
return &perlinPearls{
circleN: circleN,
dotsN: dotsN,
colorMin: colorMin,
colorMax: colorMax,
}
}
// Generative draws a circle with perlin noise.
func (pp *perlinPearls) Generative(c *generativeart.Canva) {
ctex := gg.NewContextForRGBA(c.Img())
ctex.SetLineWidth(0.5)
ctex.SetColor(common.Black)
cs := make([]circles, 0)
for len(cs) < pp.circleN {
c := circles{
x: common.RandomRangeFloat64(100, float64(c.Width())-50),
y: common.RandomRangeFloat64(100, float64(c.Height())-50),
radius: common.RandomRangeFloat64(20, 100),
colorMin: pp.colorMin,
colorMax: pp.colorMax,
}
var overlapping bool
for _, cl := range cs {
d := common.Distance(c.x, c.y, cl.x, cl.y)
if d < c.radius+cl.radius {
overlapping = true
break
}
}
if overlapping == false {
cs = append(cs, c)
}
}
ds := make([][]dot, 0)
for i := 0; i < pp.circleN; i++ {
dots := make([]dot, 0)
for j := 0; j < pp.dotsN; j++ {
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,
cx: cs[i].x,
cy: cs[i].y,
x: cs[i].x + math.Sin(theta)*cs[i].radius,
y: cs[i].y + math.Cos(theta)*cs[i].radius,
prevx: cs[i].x + math.Sin(theta)*cs[i].radius,
prevy: cs[i].y + math.Cos(theta)*cs[i].radius,
count: 0,
})
}
ds = append(ds, dots)
}
noise := common.NewPerlinNoise()
for i := 0; i < pp.circleN; i++ {
ctex.SetLineWidth(0.5)
ctex.SetColor(common.Black)
ctex.DrawCircle(cs[i].x, cs[i].y, cs[i].radius)
ctex.Stroke()
var factor = 0.008
for j := 0; j < c.Opts().NIters(); j++ {
for k := range ds[i] {
n := noise.Noise2D(ds[i][k].x*factor, ds[i][k].y*factor)
nx, ny := math.Cos(n*math.Pi*2+float64(ds[i][k].count)*math.Pi)*2, math.Sin(n*math.Pi*2+float64(ds[i][k].count)*math.Pi)*2
ds[i][k].prevx, ds[i][k].prevy = ds[i][k].x, ds[i][k].y
ds[i][k].x, ds[i][k].y = ds[i][k].x+nx, ds[i][k].y+ny
hsv := common.HSV{
H: int(common.Remap(n, 0, 1, float64(cs[i].colorMin), float64(cs[i].colorMax))),
S: 100,
V: 20,
}
if common.Distance(cs[i].x, cs[i].y, ds[i][k].x, ds[i][k].y) > cs[i].radius+1 {
ds[i][k].count += 1
}
if common.Distance(cs[i].x, cs[i].y, ds[i][k].x, ds[i][k].y) < cs[i].radius &&
common.Distance(cs[i].x, cs[i].y, ds[i][k].prevx, ds[i][k].prevy) < cs[i].radius {
ctex.SetLineWidth(c.Opts().LineWidth())
rgb := hsv.ToRGB(100, 100, 100)
rgb.A = uint8(c.Opts().Alpha())
ctex.SetColor(rgb)
ctex.DrawLine(ds[i][k].prevx, ds[i][k].prevy, ds[i][k].x, ds[i][k].y)
ctex.Stroke()
}
}
}
}
}

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@ -15,3 +15,13 @@ func (v *Vector) Multiple(z float64) {
v.X = v.X * z v.X = v.X * z
v.Y = v.Y * z v.Y = v.Y * z
} }
func (v *Vector) Normalize() {
l := Magnitude(v.X, v.Y)
v.Multiple(1 / l)
}
func (v *Vector) SetMag(m float64) {
v.Normalize()
v.Multiple(m)
}

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@ -38,6 +38,8 @@
- [parameters](#parameters-16) - [parameters](#parameters-16)
- [Domain Warping](#domain-warping) - [Domain Warping](#domain-warping)
- [parameters](#parameters-17) - [parameters](#parameters-17)
- [Perlin Perls](#perlin-perls)
- [parameters](#parameters-18)
## Color Circle 2 ## Color Circle 2
@ -282,3 +284,18 @@ d := arts.NewDomainWrap(0.01, 4, 8, cmap)
``` ```
![](../images/domainwarp.png) ![](../images/domainwarp.png)
## Perlin Perls
### parameters
- circleN: The number of circle on this image.
- dotsN: The number of dots in each circle.
- colorMin: The minimum color.
- colorMax: The maximum color.
```go
pp := arts.NewPerlinPerls(10, 200, 40, 80
```
![](../images/perlinperls.png)

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@ -12,7 +12,7 @@ func main() {
rand.Seed(time.Now().Unix()) rand.Seed(time.Now().Unix())
c := generativeart.NewCanva(500, 500) c := generativeart.NewCanva(500, 500)
c.SetBackground(common.White) c.SetBackground(common.White)
c.SetAlpha(80) c.SetAlpha(5)
c.SetLineWidth(0.3) c.SetLineWidth(0.3)
c.FillBackground() c.FillBackground()
c.SetIterations(400) c.SetIterations(400)

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@ -24,6 +24,6 @@ func main() {
c := generativeart.NewCanva(500, 500) c := generativeart.NewCanva(500, 500)
c.SetBackground(common.Black) c.SetBackground(common.Black)
c.FillBackground() c.FillBackground()
c.Draw(arts.NewDomainWrap(0.01, 4,4, 20, cmap)) c.Draw(arts.NewDomainWrap(0.01, 4, 4, 20, cmap))
c.ToPNG("domainwarp.png") c.ToPNG("domainwarp.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(120)
c.SetLineWidth(0.3)
c.FillBackground()
c.SetIterations(200)
c.Draw(arts.NewPerlinPerls(10, 200, 40, 80))
c.ToPNG("perlinperls.png")
}

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