Can anyone point me to an up to date resource on lighting meshes in GLMakie?
Whatever I try at the moment results in a completely flat color, with no way to percieve depth.
Try:
using GeometryBasics
Makie.mesh(normal_mesh(your_flat_mesh))
Thanks for getting back to me. I’ve now tried that, but I’m still getting the same.
Any other ideas? I can try to put together a minimal example if that will help
Yeah if that doesn’t work, I’ll need a minimal example!
It looks like there is indeed some lighting in your plot. Did you try changing lightposition, specular, or diffuse?
An update. I’ve partially figured out the problem: when I load an .stl file using FileIO, the loaded mesh has normal vectors all [0.0, 0.0, 0.0]. Therefore calling normal_mesh does nothing, as it believes the normals are already defined.
I can avoid the problem by using .OBJ files that I have of the mesh, instead of STLs.
I don’t know if this applies to all STLs, or only some.
Here is a minimal example, although I can’t seem to upload the .stl or .obj files here…
using ColorTypes: RGBA
using GLMakie
using GeometryBasics
using FileIO
using StaticArrays
Makie.inline!(false)
fig = Figure()
ax1 = Axis3(fig[1, 1]; aspect = :data, title=".stl")
ax2 = Axis3(fig[1, 2]; aspect = :data, title=".obj")
# Doesn't work
m1 = normal_mesh(FileIO.load("./link1.stl"))
m2 = normal_mesh(FileIO.load("./link1.obj"))
mesh!(ax1, m1; color = RGBAf(1.0, 1.0, 1.0, 1.0))
mesh!(ax2, m2; color = RGBAf(1.0, 1.0, 1.0, 1.0))
display(fig)
Note: calling normal mesh in the previous example has no effect. It can be omitted for the same result.
Ah that’s weird, not sure if that’s a problem in the .stl file or in MeshIO.
You can do:
m = FileIO.load("./link1.stl")
normal_mesh(GeometryBasics.Mesh(coordinates(m), faces(m)))
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