Assign an initial velocity to the entity.

[Xujxyang]

Thank you for the excellent work! I would like to use the MPM solver organized here to perform some simulations. However, I noticed that it doesn't seem possible to directly set the initial velocity for an entity in add_entity()

Genesis/genesis/engine/scene.py

Line 220 in da7c363

def add_entity(

or gs.morphs

Genesis/genesis/options/morphs.py

Line 20 in da7c363

class Morph(Options):

How should I achieve this?
（A more specific question is: Can I use particles for initialization and assign them an initial velocity?）

[zhenjia-xu]

You can manually set velocity after the scene is built.
Please use this function: link
Here is an example: link

[Xujxyang]

Thank you very much for your response! However, I’ve encountered another tricky issue.

I am running the example on a server with a single NVIDIA 4090 GPU. When executing this line of code

Genesis/examples/differentiable_push.py

Line 89 in 257ca2c

scene.build()

, the method here

Genesis/genesis/ext/pyrender/platforms/egl.py

Line 57 in 00d041d

num_devices = egl.EGLint()

returns a count of 0, which causes this section

Genesis/genesis/ext/pyrender/platforms/egl.py

Line 82 in 00d041d

devices = query_devices()

to fail in retrieving the GPU ID. As a result, the program cannot proceed further. Do you have any suggestions or solutions for this issue?