func getColor(iter float64) color.Color {
var c color.Color
var err error
h := iter / 360.0
h = h - math.Floor(h)
if c, err = hue.Color(h); err != nil {
panic(err)
}
return c
}
func getColor(iter, colScale int) color.Color {
var c color.Color
var err error
h := float64(iter) / float64(colScale)
h = h - math.Floor(h)
if c, err = hue.Color(h); err != nil {
panic(err)
}
return c
}
func main() {
const maxIter = 10 * 360
var d = mandel.NewData(640, 400, -0.7435669, 0.1314023, 0.0022878)
var iteration [640][400]int
fmt.Println("Iterate")
for y := 0; y < d.MaxY; y++ {
for x := 0; x < d.MaxX; x++ {
dx := float64(x) * d.StepX
dy := float64(y) * d.StepY
iteration[x][y] = mandel.Iterate(d.UpperLeftRe+dx, d.UpperLeftIm+dy, maxIter)
}
}
var err error
var c color.Color
for colorShift := 0; colorShift < 36; colorShift++ {
n := fmt.Sprintf("mandel-hue-colorshift-%02d.png", colorShift)
pi := pngimage.NewPngimage(d.MaxX, d.MaxY, n)
for y := 0; y < d.MaxY; y++ {
for x := 0; x < d.MaxX; x++ {
iter := iteration[x][y]
h := float64((iter+colorShift*10)%360) / 360.0
if c, err = hue.Color(h); err != nil {
panic(err)
}
pi.Img.Set(x, d.MaxY-y, c)
}
}
fmt.Println("write file", n)
pi.Save()
}
}