func main() {
// create a new VTK Scene
scn := vtk.NewScene()
scn.Reverse = true // start viewing the negative side of the x-y-z Cartesian system
// parameters
M := 1.0 // slope of line in p-q graph
pt := 0.0 // tensile p
a0 := 0.8 // size of surface
// limits and divisions for grid generation
pqth := []float64{pt, a0, 0, M * a0, 0, 360}
ndiv := []int{21, 21, 41}
// cone symbolising the Drucker-Prager criterion
cone := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
p, q := calc_p(x), calc_q(x)
f = q - M*p
return
})
cone.Limits = pqth
cone.Ndiv = ndiv
cone.OctRotate = true
cone.GridShowPts = false
cone.Color = []float64{0, 1, 1, 1}
cone.CmapNclrs = 0 // use this to use specified color
cone.AddTo(scn) // remember to add to Scene
// ellipsoid symbolising the Cam-clay yield surface
ellipsoid := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
p, q := calc_p(x), calc_q(x)
f = q*q + M*M*(p-pt)*(p-a0)
return
})
ellipsoid.Limits = pqth
cone.Ndiv = ndiv
ellipsoid.OctRotate = true
ellipsoid.Color = []float64{1, 1, 0, 0.5}
ellipsoid.CmapNclrs = 0 // use this to use specified color
ellipsoid.AddTo(scn) // remember to add to Scene
// illustrate use of Arrow
arr := vtk.NewArrow() // X0 is equal to origin
arr.V = []float64{-1, -1, -1}
arr.AddTo(scn)
// illustrate use of Sphere
sph := vtk.NewSphere()
sph.Cen = []float64{-a0, -a0, -a0}
sph.R = 0.05
sph.AddTo(scn)
// start interactive mode
scn.SaveOnExit = true
scn.Fnk = "/tmp/gosl/vtk_isosurf01"
scn.Run()
}
func main() {
// vtk scene
scene := vtk.NewScene()
// setting the scene up
scene.WithPlanes = false
scene.HydroLine = false
scene.AxesLen = 2
// function
r := 1.0 // radius
fcn := func(x []float64) (f, vx, vy, vz float64) {
f = x[0]*x[0] + x[1]*x[1] + x[2]*x[2] - r*r
return
}
// iso-surface object
surface := vtk.NewIsoSurf(fcn)
surface.AddTo(scene) // add surface to scene
// add arrow
arrow := vtk.NewArrow()
arrow.V = []float64{2, 2, 2}
arrow.AddTo(scene) // add arrow to scene
// filename for saving figure on exit
scene.Fnk = "/tmp/example01"
scene.SaveOnExit = true
// add to scene and show in interactive mode
scene.Run()
}
func main() {
// create a new VTK Scene
scn := vtk.NewScene()
scn.HydroLine = true
scn.FullAxes = true
scn.AxesLen = 1.5
// parameters
α := 180.0 * math.Atan(1.0/math.Sqrt2) / math.Pi // <<< touches lower plane
α = 90.0 - α // <<< touches upper plane
α = 15.0
kα := math.Tan(α * math.Pi / 180.0)
// cone
cone := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
f = cone_angle(x) - kα
return
})
cone.Limits = []float64{0, -1, 0, 1, 0, 360}
cone.Ndiv = []int{21, 21, 41}
cone.OctRotate = true
cone.GridShowPts = false
cone.Color = []float64{0, 1, 0, 1}
cone.CmapNclrs = 0 // use this to use specified color
cone.AddTo(scn) // remember to add to Scene
// spheres
sset := vtk.NewSpheresFromFile("points.dat")
if true {
sset.AddTo(scn)
}
// start interactive mode
scn.SavePng = false
scn.Fnk = "/tmp/vtk_cone01"
scn.Run()
}
func main() {
α := 0.45
κ := 2000.0
SQ3 := math.Sqrt(3.0)
M := 3.0 * SQ3 * α
qy0 := SQ3 * κ
sinφ := 3.0 * M / (M + 6.0)
φrad := math.Asin(sinφ)
φdeg := φrad * 180.0 / math.Pi
cosφ := math.Cos(φrad)
tanφ := math.Tan(φrad)
c := qy0 * tanφ / M
pt := c / tanφ
κ_ := 6.0 * c * cosφ / (SQ3 * (3.0 - sinφ))
io.Pforan("α = %v\n", α)
io.Pforan("κ = %v (%v)\n", κ, κ_)
io.Pforan("φ = %v\n", φdeg)
io.Pforan("c = %v\n", c)
io.Pforan("M = %v\n", M)
io.Pforan("qy0 = %v\n", qy0)
scn := vtk.NewScene()
scn.AxesLen = c * SQ3
pqth := []float64{-pt, pt, 0, pt * M * 1.2, 0, 360}
ndiv := []int{21, 21, 41}
cone1 := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
I1, sqJ2d := calc_I1(x), calc_sqJ2d(x)
f = sqJ2d - α*I1 - κ
return
})
cone1.Limits = pqth
cone1.Ndiv = ndiv
cone1.OctRotate = true
cone1.GridShowPts = false
cone1.Color = []float64{1, 0, 0, 1.0}
cone1.CmapNclrs = 0
cone1.AddTo(scn)
cone2 := vtk.NewIsoSurf(func(x []float64) (f, vx, vy, vz float64) {
p, q := calc_p(x), calc_q(x)
f = q - M*p - qy0
return
})
cone2.Limits = pqth
cone2.Ndiv = ndiv
cone2.OctRotate = true
cone2.GridShowPts = false
cone2.Color = []float64{0, 0, 1, 0.5}
cone2.ShowWire = true
cone2.CmapNclrs = 0
cone2.AddTo(scn)
arr := vtk.NewArrow()
arr.X0 = []float64{-pt / SQ3, -pt / SQ3, -pt / SQ3}
arr.V = []float64{pt, pt, pt}
arr.Color = []float64{0, 1, 0, 1}
arr.CyliRad = κ / 10
arr.ConeRad = 1.2 * κ / 10
arr.ConePct = 0.5
arr.AddTo(scn)
scn.Run()
}
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()
}
}