In Makie is there a way to make an isosurface have some partial transparency? There used to be I think, but I cant see an alpha option or similar http://makie.juliaplots.org/dev/plotting_functions/volume.html Over at https://lazarusa.github.io/BeautifulMakie/surfWireLines/KleinBottle/ I notice th…

After a bit of playing around with parameters, I reached this result for a transparent isosurface using a mesh: [Screenshot 2024-06-19 at 10.11.25 PM] The code looks like this using GLMakie, Meshing, GeometryBasics ξ = -40:.5:40 c = 20 a = 15 torus = [((hypot(X,Y)-c)^2+Z^2-a^2) for X in ξ, Y in…

if I use transparency=true, i.e. r = LinRange(-1, 1, 100) cube = [(x.^2 + y.^2 + z.^2) for x = r, y = r, z = r] cube_with_holes = cube .* (cube .> 1.4) volume(cube_with_holes, algorithm = :iso, isorange = 0.05, isovalue = 1.7,transparency=true) I get the following. But this is not really transpare…

Ok, some progress. If I do, e.g. contour(cube_with_holes,levels=[1.65,1.7],colormap=:blues,alpha=.3,colorrange=[-8,8]) I get the result [Screen Shot 2021-07-25 at 6.09.23 PM] Not quite what I want though. Quite dark, hard to get a clear surface

This would be really good to add to the docs, I never need volume plots but there is just one example and it’s not clear at all how to use the other modes.

I figured finding an example of roughly what I am trying to do would be more useful. I am aiming for something like the fourth example here: https://plotly.com/python/3d-isosurface-plots/

I use this trick often(https://), it gives nice results. colors = to_colormap(:balance) n = length(colors) alpha = [ones(n÷3);zeros(n-2*(n÷3));ones(n÷3)] cmap_alpha = RGBAf0.(colors, alpha)

I think this shows the issue clearly. I would expect to see two intersecting ellipsoids, with axis sitting behind (less visible due to being behind more than one layer). Here I plotted the smaller (closer) surface first. The impression is that both sit behind the axis, and the closer one appears be…

[image] AshtonSBradley: X = -40:5:40 ellipse1 = [X^2/2 + Y^2 + 2Z^2 for X in X, Y in X, Z in X]; ellipse2 = [X^2/2 + (Y-20)^2 + 2Z^2 for X in X, Y in X, Z in X]; v1=volume(ellipse2, algorithm = :iso,isovalue =350,isorange = 50,transparency=true) volume!(ellipse1, algorithm = :iso, isovalue =…

[image] lazarusA: did you tried like this: using GLMakie, ColorSchemes cbarPal= :plasma cmap = get(colorschemes[cbarPal], LinRange(0,1,100)) cmap2 = [(cmap[i],0.65) for i in 1:100] X = -40:5:40 ellipse1 = [X^2/2 + Y^2 + 2Z^2 for X in X, Y in X, Z in X]; ellipse2 = [X^2/2 + (Y-20)^2 + 2Z^2 for …

Makie isosurface transparency?

General Usage

rafael.guerra July 25, 2021, 12:05am 3

Check the absorption and contour suggestions in this amazing post.

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Makie isosurface transparency?

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