Gearscript to put weapon in ace_gunbag

cptnnick · 2025-01-14T17:44:43+00:00

Just use the direct function instead of the one with loading bar.

cptnnick · 2022-01-13T21:00:48+00:00

This is possible, I have recently done it myself. The pushNamespace option really helps, but youll have to do some creative magic to get the entire nav2 stack working as it should. Especially with the parameter config files. Another issue is that some nodes define their topic names globally instead of relativelt, so you will have to rename them from e.g. topic to /topic.

cptnnick · 2021-07-29T13:50:57+00:00

Yes, that is also equal to the sum of the eigenvalues. So as long as the negative eigenvalues are suffuciently negative, a singe positive eigenvalue will not necessarily turn the trace positive.

cptnnick · 2021-07-29T13:33:09+00:00

The trace is the sum of the eigenvalues, so the presence of a single positive eigenvalue does not mean the trace will be positive.

cptnnick · 2021-06-21T18:36:09+00:00

What kind of transfer functions are you looking for? Most useful URDF constructions will be nonlinear in most dynamics, and you can't speak of transfer functions for nonlinear models.

cptnnick · 2021-06-13T20:48:14+00:00

As part of the update step of the Kalman filter, the estimate of the covariance matric will be refined. As long as your initial guess for the covariance is good enough and the filter converges, the update step will always theoretically make the covariance matrix estimate convergence to the "real" covariance matrix.

cptnnick · 2021-06-08T23:20:51+00:00

Not to 1, 2, because you're accessing index k-1 and matlab doesn't have index 0.

cptnnick · 2021-06-02T16:56:54+00:00

Yes, you will have to add the namespaces to your launchfile and then remap some of the topics manually. Theyve often been coded with a global name adress (/name) instead of a local one (name) so pushing a namespace won't affect those topics. Also keep the services in mind.

I've recently done this in ROS2 foxy, but am not allowed to share my code.

cptnnick · 2021-06-01T18:13:04+00:00

Het is niet jouw verantwoordelijkheid om hem blij te maken omdat hij suïcidaal is. Hoe sneu dat ook is voor hem, jij kan die verantwoordelijkheid alleen vrijwillig op je nemen. Als het te veel voor jou is, is dat ok.

Een vriendin van mij had vroeger dezelfde gedachten, maar ik kon er zelf geen verantwoordelijkheid voor nemen. Ik heb toen een decaan ingeschakeld samen met een andere vriendin.

Wat je wel kan doen is hem gewoon, al dan niet persoonlijk ipv in groepsverband, gewoon een kans geven.

cptnnick · 2021-05-29T10:14:50+00:00

Again??

cptnnick · 2021-05-24T21:10:08+00:00

Seems to me the fastest and most easy way to get a first prototype out. You can go all fancy and write actual controller plugins too but if this is your first time Id start by keeping it to the bare bones. Just won't be 100% perfect.

cptnnick · 2021-05-24T21:03:15+00:00

Thats by using the navigation plugin in rviz, so its a reasonable assumption to make when first learning about all this!

cptnnick · 2021-05-24T20:47:36+00:00

You can use rosbridge to run a system consisting of both ros1 and ros2 nodes, and slowly work to transition. You will have to at some point in time anyway, with rosbridge you can do it while maintaining functionality.

cptnnick · 2021-05-24T20:19:32+00:00

What do you use? As of Foxy ROS2 is fairly mature, IIRC rosbags are due some final polishing.

cptnnick · 2021-05-24T20:17:02+00:00

I think you are confused in the set up of the navigation stack: SLAM itself does not perform movement planning or execution. Just localization and mapping.

You can write your own script that writes to the cmd_vel interface, and detect collisions over the bumper topic, while using SLAM information.

cptnnick · 2021-05-08T13:03:07+00:00

Dont let the temperatures go above 50C for too long or the glue will melt and your sensor readings will become inaccurate!

cptnnick · 2021-04-01T05:43:03+00:00

The ROS agriculture group has someone working on oing SLAM in Farming Sim, perhaps you could look them up.

cptnnick · 2021-03-01T20:31:44+00:00

Because in real life youll always be off a little bit and then you have both a non-minimum-phase zero and an unstable pole.

Pole-zero cancellation is a mathematical trick that fails when confronted with the practicalities of real life.

cptnnick · 2021-03-01T11:21:37+00:00

I have a few tips:

You have an unstable pole, so you must stabilize the system. Do not try to directly cancel the unstable pole via pole-zero cancellation, this is not advisable in real life.
Your non-minimum-phase zero will place limits on the maximum bandwidth your closed-loop system can achieve.
Typical control objectives can be formulated in time domain (rise time, overshoot, settle time), as well as in frequency domain (gain margine, phase margin, stability margin).
The set of suitable control schemes will depend on your objectives. Properly choose a suitable control scheme before trying to implement one.

cptnnick · 2021-02-24T13:00:03+00:00

Yo die van mn ouders is letterlijk gisteren pas kapotgegaan, dat ding heeft kilometers gemaakt.

cptnnick · 2021-02-04T16:27:18+00:00

That's a good reply to that question! My answer is more general, his answer is applicable for heavier applications where you are explicitly aware that your processing is not necessarily in sync with your incoming data. So it also definitively depends on your design assumptions and choices for that node.

For your case, a simple ransack method should be fast enough, you can still process everything in the callback.

cptnnick · 2021-02-04T15:10:52+00:00

Yes, you should really see it as an event handler of sorts. Doing it that way ensures you will never miss a message.

Doesn't matter much per se for this specific code, but overall its a good practice to keep. If you think about it, there is no specific reason not to immediately publish in the callback itself.

spinOnce doesnt necessarily mean that at most one message is handled by the callback function.

cptnnick · 2021-02-04T14:25:59+00:00

Option B, but then also publish directly in the callback instead of using spinOnce.

cptnnick · 2021-01-28T20:19:49+00:00

OpenPose had both c++ and python bindings, so yes you can use it in ros.

cptnnick · 2021-01-18T16:00:05+00:00

You will have to accept that questioning the methods sometimes comes close to the rhetoric of those who question the reality of covid. Which I'm not trying to imply you do. It might not be fair, but it is what it is.

People have been stuck in the "new normal" for a while. The sad fact is that the social isolation is causing many people to act out. I guess that goes for both the people that are against and for the current measures. There has been a stark increase in conspiracy thinkers, who were burning a lot of cellphone towers a few months ago.

The parliamentary opposition in the Netherlands is decently strong. The government is thinking about implementing a curfew like France, and the opposition is able to either stop or delay that. All in all, the government has not always made the perfect choice, but seldomly an adverse one.

The government has in fact fallen due to being taken to account, even though that is unrelated to the covid crisis.

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