Re: Transparent particles

[Jean-Noël Grad]

Hi,

Making the particle transparent is the right approach. The ESPResSo 
visualizer isn't very good at handling the transparency of overlapping 
particles, though. I would recommend using a third-party visualizer to 
achieve the desired effect. You could also change the length of the 
dipole with argument `director_arrows_type_scale=[16]`, if that helps.

I tried playing around with depth calculation in OpenGL to draw 
particles in the scene in the order of their insertion in the system by 
removing the `OpenGL.GLUT.GLUT_DEPTH` flag in 
`src/python/espressomd/visualization.py`. This way, if the magnetic 
particle is inserted last, its dipole is always be visible regardless of 
the camera orientation. But the result is visually unappealing, and for 
some OpenGL versions it doesn't even work.

Best,
JN

On 2/20/24 14:28, Ксения Астахова wrote:
> Good afternoon!
>
> I want to look at the arrow of the particle, but others prevent it. I 
> have tried to make them transparent by particle_type_materials, but I 
> still don't see the arrow. Is there an opportunity to visualize it nicely?
> image.png
> Good luck,
> Kseniia