// ChaosGame steps SKIP+n times, plotting the last n points.
func (o IFS) ChaosGame(targ *canvas.Canvas, n int, c canvas.Color) {
x, y := 0.5, 0.5
for i := 0; i < SKIP; i++ {
x, y = o.Choose().Apply(x, y)
}
for i := 0; i < n; i++ {
x, y = o.Choose().Apply(x, y)
targ.FSet(x, y, c)
}
}
// WholeGame
func (o IFS) WholeGame(src *canvas.Canvas, n int) *canvas.Canvas {
t1 := src.Dup()
t2 := canvas.NewCanvas(src.Width, src.Height)
for i := 0; i < n; i++ {
canvas.Say("WholeStep", i)
o.WholeStep(t1, t2)
t1, t2 = t2, t1
t2.Fill(0, 0, t2.Width, t2.Height, canvas.Black)
}
return t1
}
// MapImageTo maps one picture through an IFS onto another.
func (o Affine) MapImageTo(src *canvas.Canvas, dest *canvas.Canvas, k int, done chan int) {
for i := 0; i < src.Width; i++ {
x := float64(i) / src.FWidth
for j := 0; j < src.Height; j++ {
r, g, b := src.Get(i, j)
if r > 0 || g > 0 || b > 0 {
y := float64(j) / src.FHeight
x2, y2 := o.Apply(x, y)
dest.FSet(x2, y2, canvas.RGB(r, g, b))
}
}
}
done <- k
}
