*Dear Luning,* I could fix the Q1. Thank you! Best regards, Shunya
2023年6月20日火曜日 13:42:29 UTC-5 [email protected]: > Hello Shunya, > > I took a look at these two lines, > render_step_size = 1.0 / 100 > render_steps = math.ceil((1.0 / render_step_size) / step_size) > the render_steps will be ceil(100/step_size), which means an image is > written every (100/step_size) time steps. > > You probably want to do something like, > > render_steps = math.ceil((render_step_size) / step_size) > > Thank you, > Luning > On Monday, June 19, 2023 at 4:15:20 PM UTC-5 Shunya wrote: > >> Thanks both of you! >> I would like to ask an additional question. >> >> About Q1: >> I entered the code you gave me, but only the first render was saved. >> I saved the code to an image, and I need some advice. >> >> About Q2: >> I would like the acceleration for each calculation step to be added in >> csv during the simulation. >> In the current code (image), only the latest acceleration is saved in csv. >> This question is far from PyChrono, but I would like to get some advice >> on how to implement it. >> >> Best regards, >> Shunya >> >> [image: スクリーンショット 2023-06-19 161104.png] >> >> 2023年6月16日金曜日 16:38:08 UTC-5 [email protected]: >> >> >> For Q1, there's an API, WriteImageToFile(filename) , for taking a >> snapshot of the irrlicht visualization at each rendering frame, then you >> can stitch together the pictures to make a video. >> >> >> >> vis.BeginScene() >> >> vis.Render() >> >> vis.EndScene() >> >> >> >> if (steps % render_steps == 0): >> >> filename = 'img_'+ str(render_frame).zfill(4) +'.jpg' >> >> vis.WriteImageToFile(filename) >> >> render_frame += 1 >> >> >> >> Thank you, >> >> Luning >> On Friday, June 16, 2023 at 4:24:35 PM UTC-5 Nevindu Batagoda wrote: >> >> Hello Shunya, >> >> For Q2, I don't believe there is a direct API call to do this but what >> you can do is, >> >> 1. Push a data access filter for the IMU (either for the >> accelerometer, gyro, or magnetometer) after constructing it. Ex: acc >> .PushFilter(sens.ChFilterAccelAccess()) >> 2. Then during the simulation loop, access the IMU data and publish >> them into a CSV file. Here is an example of accessing and printing >> accelerometer data, >> >> while (ch_time < end_time): >> >> # Access the sensor data >> acc_data = acc.GetMostRecentAccelBuffer() >> # Check data is present >> # If so, print out the max value >> if acc_data.HasData(): >> print("Accelerometer:",acc_data.GetAccelData().shape,"max:", >> np.max(acc_data.GetAccelData())) >> >> A full demo can be seen here: >> https://github.com/projectchrono/chrono/blob/main/src/demos/python/sensor/demo_SEN_sensors.py >> >> Let me know if there's anything else. >> >> Best, >> Nevindu M. Batagoda >> On Friday, June 16, 2023 at 3:28:16 PM UTC-5 Shunya wrote: >> >> *Dear all,* >> I hava two questions about PyChrono's API. >> Q1:Is it possible to record video of the simulation using PyChrono's API? >> Q2: Is it possible to save IMU data to CSV using PyChrono's API? >> >> Background of questions: >> I am making the vehicle runnning model in PyChrono, referring to >> "demo_MBS_tracks.cpp". >> I would like to save the data from IMU to CSV in order to check the >> running status. >> And I would like to save the video of the nehicle running in the >> simulation. >> >> Best regards, >> >> -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/d3f3328d-88b1-4fd0-80d9-3f4ecb4d0623n%40googlegroups.com.
