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MathGroup Archive 2005

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Re: Desperate help

  • To: mathgroup at
  • Subject: [mg61483] Re: [mg61438] Desperate help
  • From: "David Park" <djmp at>
  • Date: Wed, 19 Oct 2005 23:07:37 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

With the DrawGraphics package from my web site below it's pretty easy. Here
are two methods. One uses DrawingTransform3D to apply transformations to the
3D graphics primitives. The other uses the TranslateShape routine from the
Shapes packaged, but adapted to work directly on primitive graphics.


    {SphericalDraw3D[2, {theta, 0, Pi}, {phi, 0, 2Pi}] /.
        DrawingTransform3D[#1 + 1 &, #2 + 2 &, #3 - 2 &]},
    Axes -> True,
    AxesLabel -> {x, y, z},
    ImageSize -> 400];

    {SphericalDraw3D[2, {theta, 0, Pi}, {phi, 0, 2Pi}] //
        UseTranslateShape[{1, 2, -2}]},
    Axes -> True,
    AxesLabel -> {x, y, z},
    ImageSize -> 400];

With the above constructions you could easily add a number of different
spheres and other surfaces at various locations. DrawGraphics also allows
you to easily turn down the color saturation of the lighting and then use
various lighter surface colors for various spheres. Here are two different
spheres of different colors at two locations. I drew the polygon edges in a
slightly darker shade of the surface colors so they would be subdued.

      EdgeForm[ColorMix[LightSteelBlue, Black][0.3]],
      SphericalDraw3D[1, {theta, 0, Pi}, {phi, 0, 2Pi}] //
        UseTranslateShape[{1, 2, -2}],

      SurfaceColor[LightCoral], EdgeForm[ColorMix[LightCoral, Black][0.3]],
      SphericalDraw3D[1, {theta, 0, Pi}, {phi, 0, 2Pi}] //
        UseTranslateShape[{2, 3, 1}]},

    NeutralLighting[0.3, 0.5, 0.1],
    Axes -> True,
    AxesLabel -> {x, y, z},
    Background -> Linen,
    ImageSize -> 400];

In regular Mathematica to plot a single sphere you could use...


      SphericalPlot3D[2, {theta, 0, Pi}, {phi, 0, 2Pi},
        DisplayFunction -> Identity], {1, 2, -2}],
    DisplayFunction -> $DisplayFunction];

David Park
djmp at

From: nomad111 [mailto:g_h_111 at]
To: mathgroup at

hi every1
i really need to kno how to move the center of a circle in SphericalPlot3D.
I need the center at (1,2,-2) and any radius (say 5).
Appreciate any help


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