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drawing.go
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drawing.go
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// Copyright 2016 The Gosl Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package plt
import (
"math"
"github.com/cpmech/gosl/io"
)
// AutoScale rescales plot area
func AutoScale(P [][]float64) {
if len(P) < 1 {
return
}
xmin, ymin := P[0][0], P[0][1]
xmax, ymax := xmin, ymin
for _, p := range P {
if p[0] < xmin {
xmin = p[0]
}
if p[1] < ymin {
ymin = p[1]
}
if p[0] > xmax {
xmax = p[0]
}
if p[1] > ymax {
ymax = p[1]
}
}
io.Ff(&bufferPy, "plt.axis([%g, %g, %g, %g])\n", xmin, xmax, ymin, ymax)
}
// Arrow adds arrow to plot
// styles:
// Curve - None
// CurveB -> head_length=0.4,head_width=0.2
// BracketB -[ widthB=1.0,lengthB=0.2,angleB=None
// CurveFilledB -|> head_length=0.4,head_width=0.2
// CurveA <- head_length=0.4,head_width=0.2
// CurveAB <-> head_length=0.4,head_width=0.2
// CurveFilledA <|- head_length=0.4,head_width=0.2
// CurveFilledAB <|-|> head_length=0.4,head_width=0.2
// BracketA ]- widthA=1.0,lengthA=0.2,angleA=None
// BracketAB ]-[ widthA=1.0,lengthA=0.2,angleA=None,widthB=1.0,lengthB=0.2,angleB=None
// Fancy fancy head_length=0.4,head_width=0.4,tail_width=0.4
// Simple simple head_length=0.5,head_width=0.5,tail_width=0.2
// Wedge wedge tail_width=0.3,shrink_factor=0.5
// BarAB |-| widthA=1.0,angleA=None,widthB=1.0,angleB=None
func Arrow(xi, yi, xf, yf float64, args *A) {
style := "simple"
scale := 20.0
if args.Style != "" {
style = args.Style
}
if args.Scale > 0 {
scale = args.Scale
}
uid := genUid()
io.Ff(&bufferPy, "pc%d = pat.FancyArrowPatch((%g,%g),(%g,%g),shrinkA=0,shrinkB=0,path_effects=[pff.Stroke(joinstyle='miter')],arrowstyle='%s',mutation_scale=%g", uid, xi, yi, xf, yf, style, scale)
updateBufferAndClose(&bufferPy, args, false, false)
io.Ff(&bufferPy, "plt.gca().add_patch(pc%d)\n", uid)
}
// Circle adds circle to plot
func Circle(xc, yc, r float64, args *A) {
uid := genUid()
io.Ff(&bufferPy, "pc%d = pat.Circle((%g,%g), %g", uid, xc, yc, r)
updateBufferAndClose(&bufferPy, args, false, false)
io.Ff(&bufferPy, "plt.gca().add_patch(pc%d)\n", uid)
}
// Arc adds arc to plot
// minAlpha and maxAlpha are in degrees
func Arc(xc, yc, r, minAlpha, maxAlpha float64, args *A) {
uid := genUid()
r2 := 2.0 * r
θ1 := minAlpha * 180.0 / math.Pi
θ2 := maxAlpha * 180.0 / math.Pi
io.Ff(&bufferPy, "pc%d = pat.Arc((%g,%g),%g,%g,angle=0,theta1=%g,theta2=%g", uid, xc, yc, r2, r2, θ1, θ2)
updateBufferAndClose(&bufferPy, args, false, false)
io.Ff(&bufferPy, "plt.gca().add_patch(pc%d)\n", uid)
}
// Polyline draws a polyline. P[npts][2]
func Polyline(P [][]float64, args *A) {
if len(P) < 1 {
return
}
uid := genUid()
io.Ff(&bufferPy, "dat%d = [[pth.Path.MOVETO, [%g, %g]]", uid, P[0][0], P[0][1])
for _, p := range P {
io.Ff(&bufferPy, ", [pth.Path.LINETO, [%g, %g]]", p[0], p[1])
}
closed := true
if args != nil {
closed = args.Closed
}
if closed {
io.Ff(&bufferPy, ", [pth.Path.CLOSEPOLY, [0, 0]]")
}
io.Ff(&bufferPy, "]\n")
io.Ff(&bufferPy, "commands%d, vertices%d = zip(*dat%d)\n", uid, uid, uid)
io.Ff(&bufferPy, "ph%d = pth.Path(vertices%d, commands%d)\n", uid, uid, uid)
io.Ff(&bufferPy, "pc%d = pat.PathPatch(ph%d", uid, uid)
updateBufferAndClose(&bufferPy, args, false, false)
io.Ff(&bufferPy, "plt.gca().add_patch(pc%d)\n", uid)
}
// Polygon3d draws a polygon in 3D. P[npts][3]
func Polygon3d(P [][]float64, args *A) {
if len(P) < 1 {
return
}
if args == nil {
args = &A{Fc: "#5294ed", Ec: "#ffec4f"}
}
createAxes3d()
uid := genUid()
io.Ff(&bufferPy, "verts%d = [[", uid)
for i, p := range P {
if i > 0 {
io.Ff(&bufferPy, ",")
}
io.Ff(&bufferPy, "(")
for j, x := range p {
if j > 0 {
io.Ff(&bufferPy, ",")
}
io.Ff(&bufferPy, "%g", x)
}
io.Ff(&bufferPy, ")")
}
io.Ff(&bufferPy, "]]\n")
io.Ff(&bufferPy, "poly%d = m3d.art3d.Poly3DCollection(verts%d)\n", uid, uid)
io.Ff(&bufferPy, "poly%d.set_color('%s')\n", uid, args.Fc)
io.Ff(&bufferPy, "poly%d.set_edgecolor('%s')\n", uid, args.Ec)
io.Ff(&bufferPy, "plt.gca().add_collection3d(poly%d)\n", uid)
}
// Box draws box
// NOTE: args.Wire and args.Ls are used to draw a wire around the edges of the box
func Box(xmin, xmax, ymin, ymax, zmin, zmax float64, args *A) {
if args == nil {
args = &A{Fc: "#5294ed", Ec: "#ffec4f", Lw: 3}
}
createAxes3d()
uid := genUid()
io.Ff(&bufferPy, "verts%d = [\n", uid)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)],\n", xmin, ymin, zmin, xmin, ymax, zmin, xmin, ymax, zmax, xmin, ymin, zmax)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)],\n", xmax, ymin, zmin, xmax, ymax, zmin, xmax, ymax, zmax, xmax, ymin, zmax)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)],\n", xmin, ymin, zmin, xmin, ymin, zmax, xmax, ymin, zmax, xmax, ymin, zmin)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)],\n", xmin, ymax, zmin, xmin, ymax, zmax, xmax, ymax, zmax, xmax, ymax, zmin)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)],\n", xmin, ymin, zmin, xmin, ymax, zmin, xmax, ymax, zmin, xmax, ymin, zmin)
io.Ff(&bufferPy, " [(%g,%g,%g),(%g,%g,%g),(%g,%g,%g),(%g,%g,%g)]\n", xmin, ymin, zmax, xmin, ymax, zmax, xmax, ymax, zmax, xmax, ymin, zmax)
io.Ff(&bufferPy, "]\n")
if args.A > 0 {
io.Ff(&bufferPy, "poly%d = m3d.art3d.Poly3DCollection(verts%d, alpha=%g)\n", uid, uid, args.A)
} else {
io.Ff(&bufferPy, "poly%d = m3d.art3d.Poly3DCollection(verts%d)\n", uid, uid)
}
io.Ff(&bufferPy, "poly%d.set_color('%s')\n", uid, args.Fc)
io.Ff(&bufferPy, "poly%d.set_edgecolor('%s')\n", uid, args.Ec)
if args.Lw > 0 {
io.Ff(&bufferPy, "poly%d.set_linewidth(%g)\n", uid, args.Lw)
}
io.Ff(&bufferPy, "plt.gca().add_collection3d(poly%d)\n", uid)
if args.Wire {
ls := "--"
if args.Ls != "" {
ls = args.Ls
}
io.Ff(&bufferPy, "verts%d.append([(%g,%g,%g),(%g,%g,%g)])\n", uid, xmin, ymin, zmin, xmax, ymin, zmin)
io.Ff(&bufferPy, "plt.gca().add_collection3d(m3d.art3d.Line3DCollection(verts%d, colors='k', linewidth=0.7, linestyles='%s'))\n", uid, ls)
}
}