How to change the color of the robots?

[GPaolo]

Hi, I tried to change the colors of the Ant model by modifying the xml file rgba parameters, but with no luck. How can I change its colors?

[benelot]

Hi, Unfortunately, that is not working yet in pybullet. Go to their repo and ask if there is a way to change the colors, this will push the issue.

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On Sat, Jul 27, 2019, 12:47 Giuseppe Paolo ***@***.***> wrote: Hi, I tried to change the colors of the Ant model by modifying the xml file rgba parameters, but with no luck. How can I change its colors? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#29?email_source=notifications&email_token=AAXXXK7QXZXGZQZESI7ATE3QBQRTXA5CNFSM4IHI722KYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HB26Y6Q>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAXXXK5XIKCE5DDVG3ACG63QBQRTXANCNFSM4IHI722A> .

[GPaolo]

Ok, thanks!

[GPaolo]

So, after quite sometime going through the code and thanks to the suggestions gotten on the pybullet repo, I found out how to do that.

I added this lines to the reset method in the walker_base_env and it works

for link in range(-1, 20): #Changes the color of the robot Ant p.changeVisualShape(1, link, rgbaColor=[0.8, 0.6, 0.4, 1])
Still cannot read the color from the xml file, but this is a "nice" workaround. If I end up managing to read and set the color link by link from the xml file, I will do pull request.

[benelot]

Ok, yes that can be done. It is very sad that pybullet does not provide all information from the xml to us as a custom_fields dict or so. That would be very helpful to easily read the color data from it for example. Maybe we should suggest it to be implemented?

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On Fri, Aug 16, 2019, 15:20 Giuseppe Paolo ***@***.***> wrote: So, after quite sometime going through the code and thanks to the suggestions gotten on the pybullet repo, I found out how to do that. I added this lines to the reset method in the walker_base_env and it works for link in range(-1, 20): #Changes the color of the robot Ant p.changeVisualShape(1, link, rgbaColor=[0.8, 0.6, 0.4, 1]) Still cannot read the color from the xml file, but this is a "nice" workaround. If I end up managing to read and set the color link by link from the xml file, I will do pull request. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#29?email_source=notifications&email_token=AAXXXK4G73SNON63W72DDVLQE2SRBA5CNFSM4IHI722KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD4OS5ZA#issuecomment-522006244>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAXXXK3DQLIS7ZVFYUAXKLLQE2SRBANCNFSM4IHI722A> .

[GPaolo]

I actually just found out this pull request that they had in pybullet : #1506 that looks like would implement something like this on version >=1.8.1, but for me it does not work on version 2.5.3.

I asked them about it, maybe I am doing something wrong ^^'

[CharlesXu1124]

So, after quite sometime going through the code and thanks to the suggestions gotten on the pybullet repo, I found out how to do that.

I added this lines to the reset method in the walker_base_env and it works

for link in range(-1, 20): #Changes the color of the robot Ant p.changeVisualShape(1, link, rgbaColor=[0.8, 0.6, 0.4, 1])
Still cannot read the color from the xml file, but this is a "nice" workaround. If I end up managing to read and set the color link by link from the xml file, I will do pull request.

the first argument should be the robot UID, and then the link index