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-
- (*:Version: Mathematica 2.0 *)
-
- (*:Name: Graphics`ParametricPlot3D *)
-
- (*:Title: Parametric Plots of 3D Objects *)
-
- (*:Author:
- Roman E. Maeder
- *)
-
- (*:Keywords:
- Parametric, Spherical, Cylindrical Plot, 3D
- *)
-
- (*:Requirements: none. *)
-
- (*:Warnings: none. *)
-
- (*:Sources:
- Roman E. Maeder: Programming in Mathematica, 2nd Ed.,
- Addison-Wesley, 1991.
- *)
-
- (*:Summary:
- *)
-
-
- BeginPackage["Graphics`ParametricPlot3D`"]
-
- ParametricPlot3D::usage = StringJoin[ ParametricPlot3D::usage,
- " ParametricPlot3D[{x,y,z,(style)}, {u,u0,u1,du}, ({v,v0,v1,dv})]
- uses increments du and dv instead of the PlotPoints option." ]
-
- PointParametricPlot3D::usage =
- "PointParametricPlot3D[{x,y,z}, {u,u0,u1,(du)}, (options..)]
- plots a one-parameter set of points in space.
- PointParametricPlot3D[{x,y,z}, {u,u0,u1,(du)}, {v,v0,v1,(dv)}, (options..)]
- plots a two-parameter set of points in space. Options are passed to Show[]."
-
- SphericalPlot3D::usage = "SphericalPlot3D[r, {theta-range}, {phi-range}, (options...)]
- plots r as a function of the angles theta and phi.
- SphericalPlot3D[{r, style}, ...] uses style to render each surface patch"
-
- CylindricalPlot3D::usage = "CylindricalPlot3D[z, {r-range}, {phi-range}, (options...)]
- plots z as a function of r and phi.
- CylindricalPlot3D[{z, style}, ...] uses style to render each surface patch"
-
- Begin["`Private`"]
-
- protected = Unprotect[ParametricPlot3D]
-
- FilterOptions[ command_Symbol, opts___ ] :=
- Module[{keywords = First /@ Options[command]},
- Sequence @@ Select[ {opts}, MemberQ[keywords, First[#]]& ]
- ]
-
- (* overload ParametricPlot3D to allow increments in iterators *)
-
- ParametricPlot3D[ fun_,
- {u_, u0_, u1_, du_:Automatic}, {v_, v0_, v1_, dv_:Automatic}, opts___ ] :=
- Module[{plotpoints},
- plotpoints = PlotPoints /. {opts} /. Options[ParametricPlot3D];
- If[ Head[plotpoints] =!= List, plotpoints = {plotpoints, plotpoints} ];
- If[ du =!= Automatic, plotpoints[[1]] = Round[N[(u1-u0)/du]] + 1 ];
- If[ dv =!= Automatic, plotpoints[[2]] = Round[N[(v1-v0)/dv]] + 1 ];
- ParametricPlot3D[ fun, {u, u0, u1}, {v, v0, v1},
- PlotPoints -> plotpoints, opts]
- ] /; du =!= Automatic || dv =!= Automatic
-
- ParametricPlot3D[ fun_, {u_, u0_, u1_, du_}, opts___ ] :=
- ParametricPlot3D[ fun, {u, u0, u1}, PlotPoints -> Round[N[(u1-u0)/du]] + 1, opts]
-
-
- Attributes[PointParametricPlot3D] = {HoldFirst}
-
- PointParametricPlot3D[ fun_,
- {u_, u0_, u1_, du_:Automatic}, {v_, v0_, v1_, dv_:Automatic}, opts___ ] :=
- Module[{plotpoints, ndu = N[du], ndv = N[dv]},
- plotpoints = PlotPoints /. {opts} /. Options[ParametricPlot3D];
- If[ plotpoints === Automatic, plotpoints = 15];
- If[ Head[plotpoints] =!= List, plotpoints = {plotpoints, plotpoints} ];
- If[ du === Automatic, ndu = N[(u1-u0)/(plotpoints[[1]]-1)] ];
- If[ dv === Automatic, ndv = N[(v1-v0)/(plotpoints[[2]]-1)] ];
- Show[ Graphics3D[Table[ Point[N[fun]], {u, u0, u1, ndu}, {v, v0, v1, ndv} ]],
- FilterOptions[Graphics3D, opts] ]
- ] /; NumberQ[N[u0]] && NumberQ[N[u1]] && NumberQ[N[v0]] && NumberQ[N[v1]]
-
-
- (* point space curve *)
-
- PointParametricPlot3D[ fun_, ul:{_, u0_, u1_, du_}, opts___ ] :=
- Show[ Graphics3D[Table[ Point[N[fun]], ul ]], FilterOptions[Graphics3D, opts] ] /;
- NumberQ[N[u0]] && NumberQ[N[u1]] && NumberQ[N[du]]
-
- PointParametricPlot3D[ fun_, {u_, u0_, u1_}, opts___ ] :=
- Module[{plotpoints},
- plotpoints = PlotPoints /. {opts} /. Options[ParametricPlot3D];
- If[ Head[plotpoints] == List, plotpoints = plotpoints[[1]] ];
- PointSpaceCurve[ fun, {u, u0, u1, (u1-u0)/(plotpoints-1)}, opts ]
- ]
-
-
- Attributes[SphericalPlot3D] = {HoldFirst}
-
- SphericalPlot3D[ {r_, style_}, tlist:{theta_, __}, plist:{phi_, __}, opts___ ] :=
- Module[{rs},
- ParametricPlot3D[ {(rs = r) Sin[theta] Cos[phi],
- rs Sin[theta] Sin[phi],
- rs Cos[theta],
- style},
- tlist, plist, opts ]
- ]
-
- SphericalPlot3D[ r_, tlist:{theta_, __}, plist:{phi_, __}, opts___ ] :=
- ParametricPlot3D[ r{Sin[theta] Cos[phi],
- Sin[theta] Sin[phi],
- Cos[theta]},
- tlist, plist, opts ]
-
-
- Attributes[CylindricalPlot3D] = {HoldFirst}
-
- CylindricalPlot3D[ {z_, style_}, rlist:{r_, __}, plist:{phi_, __}, opts___ ] :=
- ParametricPlot3D[{r Cos[phi], r Sin[phi], z, style}, rlist, plist, opts]
-
- CylindricalPlot3D[ z_, rlist:{r_, __}, plist:{phi_, __}, opts___ ] :=
- ParametricPlot3D[{r Cos[phi], r Sin[phi], z}, rlist, plist, opts]
-
- Protect[ Evaluate[protected] ]
-
- End[] (* Graphics`ParametricPlot3D`Private` *)
-
- Protect[PointParametricPlot3D, SphericalPlot3D, CylindricalPlot3D]
-
- EndPackage[] (* Graphics`ParametricPlot3D` *)
-
- (*:Limitations: none known. *)
-