func DTLZ2mGenerator(opt *goga.Optimiser, nf int) (ng int, fcn goga.MinProb_t) {
nx := nf + 10
ng = nx * 2
opt.FltMin = make([]float64, nx)
opt.FltMax = make([]float64, nx)
for i := 0; i < nx; i++ {
opt.FltMin[i], opt.FltMax[i] = -0.01, 1.01
}
fcn = func(f, g, h, x []float64, ξ []int, cpu int) {
var failed bool
for i := 0; i < nx; i++ {
g[0+i*2] = x[i]
g[1+i*2] = 1.0 - x[i]
if g[0+i*2] < 0 {
failed = true
}
if g[1+i*2] < 0 {
failed = true
}
}
if failed {
return
}
var c float64
for i := nf - 1; i < nx; i++ {
c += math.Pow((x[i] - 0.5), 2.0)
}
for i := 0; i < nf; i++ {
f[i] = (1.0 + c)
for j := 0; j < nf-1-i; j++ {
f[i] *= math.Cos(x[j] * PI / 2.0)
}
if i > 0 {
j := nf - 1 - i
f[i] *= math.Sin(x[j] * PI / 2.0)
}
}
}
opt.Multi_fcnErr = func(f []float64) float64 {
var sum float64
for i := 0; i < nf; i++ {
sum += f[i] * f[i]
}
return sum - 1.0
}
opt.RptFmin = make([]float64, nf)
opt.RptFmax = make([]float64, nf)
for i := 0; i < nf; i++ {
opt.RptFmax[i] = 1
}
return
}
func vtk_plot3(opt *goga.Optimiser, αcone, ptRad float64, onlyFront0, twice bool) {
// results
var X, Y, Z []float64
if onlyFront0 {
for _, sol := range opt.Solutions {
if sol.Feasible() && sol.FrontId == 0 {
X = append(X, sol.Ova[0])
Y = append(Y, sol.Ova[1])
Z = append(Z, sol.Ova[2])
}
}
} else {
X, Y, Z = make([]float64, opt.Nsol), make([]float64, opt.Nsol), make([]float64, opt.Nsol)
for i, sol := range opt.Solutions {
X[i], Y[i], Z[i] = sol.Ova[0], sol.Ova[1], sol.Ova[2]
}
}
// create a new VTK Scene
scn := vtk.NewScene()
scn.HydroLine = false
scn.FullAxes = false
scn.AxesLen = 1.1
scn.WithPlanes = false
scn.LblX = io.Sf("f%d", 0)
scn.LblY = io.Sf("f%d", 1)
scn.LblZ = io.Sf("f%d", 2)
scn.LblSz = 20
if opt.RptName == "DTLZ1" {
scn.AxesLen = 0.6
}
// optimal Pareto front
front := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
f = opt.Multi_fcnErr(x)
return
})
front.Limits = []float64{opt.RptFmin[0], opt.RptFmax[0], opt.RptFmin[1], opt.RptFmax[1], opt.RptFmin[2], opt.RptFmax[2]}
front.Color = []float64{0.45098039, 0.70588235, 1., 0.8}
front.CmapNclrs = 0 // use this to use specified color
front.Ndiv = []int{61, 61, 61}
front.AddTo(scn)
// cone
if opt.RptName == "DTLZ2c" {
cone := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
f = cone_angle(x) - math.Tan(αcone)
return
})
cone.Limits = []float64{0, -1, 0, 1, 0, 360}
cone.Ndiv = []int{61, 61, 81}
cone.OctRotate = true
cone.GridShowPts = false
cone.Color = []float64{0.96862745, 0.75294118, 0.40784314, 0.5}
cone.CmapNclrs = 0 // use this to use specified color
cone.AddTo(scn) // remember to add to Scene
}
// particles
var P vtk.Spheres
P.X, P.Y, P.Z = X, Y, Z
P.R = utl.DblVals(len(X), ptRad)
P.Color = []float64{1, 0, 0, 1}
P.AddTo(scn)
// start interactive mode
scn.SaveEps = false
scn.SavePng = true
scn.PngMag = 2
scn.Fnk = io.Sf("/tmp/goga/vtk_%s_A", opt.RptName)
scn.Run()
if twice {
scn.Fnk = io.Sf("/tmp/goga/vtk_%s_B", opt.RptName)
scn.Run()
}
}
