Search found 45 matches

by Wilsonator
07 Jan 2016, 11:16
Forum: General questions
Topic: Stability with external forces from remote API
Replies: 3
Views: 2193

Stability with external forces from remote API

This is a bit of an open ended question, but I wanted to ask in case you have any suggestions based on experience. I am running a vehicle that is using a remote API to interface with a vehicle tire model. This remote API then synchronously sends forces and torques back to V-REP to provide the ground...
by Wilsonator
05 Jan 2016, 19:57
Forum: General questions
Topic: Smaller physics timestep
Replies: 1
Views: 1591

Smaller physics timestep

Is is possible to reduce the physics engine time steps below 1e-4? I am running a simulation with time steps on the order of 1e-4 and I was trying to set the physics engine time step to 1e-5, but the setting would not stick and corrects to 1e-4.

Is this the hard lower limit in vrep?
by Wilsonator
04 Jan 2016, 18:54
Forum: General questions
Topic: Simulation time synced video recording
Replies: 3
Views: 2150

Re: Simulation time synced video recording

Depending on current computational load, the simulation rendering for me tends to drift between 35fps to 20fps. Is there any way to adjust for this in the video recording? I am currently running a simulation with a low time step that will take ~300s real time to simulation 1s simulation time. For a ...
by Wilsonator
31 Dec 2015, 04:17
Forum: General questions
Topic: How simx_opmode_streaming works
Replies: 1
Views: 2046

How simx_opmode_streaming works

So looking at http://www.coppeliarobotics.com/helpFiles/en/remoteApiModusOperandi.htm I am trying to figure out when simx_opmode_streaming for a function like simxGetObjectPosition would work when running a synchronous remote API. So take this psudo example: simxStart(...) simxGetObjectPosition(...,...
by Wilsonator
29 Dec 2015, 00:48
Forum: General questions
Topic: Simulation time synced video recording
Replies: 3
Views: 2150

Simulation time synced video recording

I am having trouble recording a video that is synced with simulation time. To clarify, I have a simulation that is running much slower than real time. So lets say 1000s of program run time, equal 10s of simulation time (e.g. 1/100 of real time). I want to record a video of this simulation for say 10...
by Wilsonator
15 Dec 2015, 23:10
Forum: General questions
Topic: simxStart() Responsivness
Replies: 1
Views: 579

simxStart() Responsivness

Is there any way to improve responsiveness of a remote connection further than 1ms?

With simxStart() the value commThreadCycleInMs can be set as low as 1ms. Is it possible to ask for 0.1ms for example?
by Wilsonator
14 Dec 2015, 19:03
Forum: General questions
Topic: how to get vrep run
Replies: 13
Views: 2905

Re: how to get vrep run

Maybe I am missing something... But is there a reason you aren't using the pre-compiled binary provided here http://www.coppeliarobotics.com/downloads.html . Just click on the windows icon, should avoid most of your issues. Sounds like your last question would be best solved from the Remote API. See...
by Wilsonator
14 Dec 2015, 10:47
Forum: General questions
Topic: Frame conventions and transform matrix conventions
Replies: 1
Views: 1663

Frame conventions and transform matrix conventions

I just have some questions to firm up my understanding of frame conventions in V-rep. 1) For a function such as simxGetObjectPosition(), specifying -1 for absolute position will be the global frame with fixed position and orientation ( x forward, y left, z up)? 2) Take the absolute transform matrix ...
by Wilsonator
01 Oct 2015, 22:27
Forum: Bug reports
Topic: Joint Velocity time delay
Replies: 1
Views: 2064

Joint Velocity time delay

I noticed today that during simulation, there is a difference between graph data reported by "Joint: Velocity" and an derivative data transform of "Joint: Position". Theoretically these should be identical. What I see is that the derivative transform of "Joint: Position" is returning the correct res...
by Wilsonator
01 Oct 2015, 01:00
Forum: General questions
Topic: Vision Sensor Frame Rate
Replies: 3
Views: 2067

Vision Sensor Frame Rate

How do I control the frame rate of the vision sensors?

Can you set a vision sensor to run at a specific frame rate?