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$\begingroup$ 
P0={0,0,0};P1={1,0,0};P2={0,1,0};P3={0,0,1};P4={1,1,1};P5={-1,-1,-1};
R[4]=ConvexHullMesh[{P0,P1,P3,P4},Frame->True,PlotRange -> Automatic,MeshCellStyle -> {{2,All}-> Opacity[.4, Red],{1,All}->Black,{0,All}->Blue}];

Show[Region[R[4], PlotRange -> {{-1.2, 1.2}, {-1.2, 1.2},{-1.2,1.2}}, 
  Axes-> True, ImageSize -> Large,AxesOrigin->{0,0,0},LabelStyle ->{12,Bold,Black},AxesLabel->{x,y,z},AxesStyle->Thick,Boxed->True]]

I have the following 3D convex hull. How can I give different colors to different faces of the convex hull?

Thank you

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2
  • $\begingroup$ "different sides" - you mean "different faces", yes? $\endgroup$
    – J. M.'s slightly less busy ♦
    Apr 25, 2020 at 11:05
  • $\begingroup$ Yes. Different faces. I will edit it. Thanks $\endgroup$
    – Epsilon
    Apr 25, 2020 at 11:07

1 Answer 1

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$\begingroup$ 
faces = MeshPrimitives[R[4], "Polygons"];
colors = {Red, Green, Blue, Orange};

Graphics3D[Transpose@{colors , faces}, 
 PlotRange -> {{-1.2, 1.2}, {-1.2, 1.2}, {-1.2, 1.2}}, Axes -> True, 
 ImageSize -> Large, AxesOrigin -> {0, 0, 0}, 
 LabelStyle -> {12, Bold, Black}, AxesLabel -> {x, y, z}, 
 AxesStyle -> Thick, Boxed -> True]

enter image description here

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7
  • $\begingroup$ Thanks. Is it possible to change the opacity of the colors so that the we don't see the axis lines through the hull? $\endgroup$
    – Epsilon
    Apr 25, 2020 at 11:22
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    $\begingroup$ @Sumit, you can define colors as colors = Opacity[.5, #]& /@ {Red, Green, Blue, Orange} $\endgroup$
    – kglr
    Apr 25, 2020 at 11:44
  • $\begingroup$ Thanks a lot for your help. $\endgroup$
    – Epsilon
    Apr 25, 2020 at 11:48
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    $\begingroup$ @Sumit, my pleasure. $\endgroup$
    – kglr
    Apr 25, 2020 at 11:51
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    $\begingroup$ you can try something like Epilog -> {Inset[Style["text", 16, Red], {.5, .7}], Text[Style["text2", 16, Green], {.3, .4}]} $\endgroup$
    – kglr
    Apr 25, 2020 at 12:09

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