Скачать или смотреть How to Set the Throttle Input of Vehicles in UE4 Using Acceleration/Speed Data from SUMO

Discover how to synchronize vehicle movement in UE4 and SUMO using acceleration and speed data with this comprehensive guide.
---
This video is based on the question https://stackoverflow.com/q/69757246/ asked by the user 'Peter Y' ( https://stackoverflow.com/u/17272110/ ) and on the answer https://stackoverflow.com/a/70376376/ provided by the user 'Peter Y' ( https://stackoverflow.com/u/17272110/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to set the throttle input of a vehicle in UE4 using acceleration/speed data from SUMO?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Synchronizing Vehicle Movement in Unreal Engine 4 (UE4) with SUMO Data

When it comes to creating realistic simulations in Unreal Engine 4 (UE4), particularly for vehicle dynamics, one of the most important aspects is ensuring that the vehicles move in alignment with the data derived from traffic simulation tools like Simulation of Urban MObility (SUMO). If you've successfully established a connection between SUMO and UE4, you're probably eager to make the vehicle behavior in UE4 reflect the simulation accurately. One common question that arises is:

How do you set the throttle input of a vehicle in UE4 using acceleration and speed information from SUMO?

Let’s dive into the solution and unravel how to achieve this synchronization effectively.

Understanding the Challenge

You might find yourself in a situation where:

You’ve linked SUMO to UE4 using network sockets, allowing you to pull relevant vehicle data such as speed and acceleration.

You've replicated vehicle positions and initial settings between both platforms.

However, you are facing difficulties in dynamically setting the speed of vehicles in UE4 based on the dynamic data coming from SUMO.

In essence, without the ability to control how fast a vehicle in UE4 moves based on incoming data, achieving realistic interactions—especially during simultaneous turns—becomes a daunting task.

Solution Overview

While there's no straightforward method to directly set the velocity of vehicle actors in UE4 using SUMO data, there are workarounds that can help you achieve a smoother synchronization. Here’s how you can proceed:

Step 1: Use Static Meshes for Vehicles

One practical workaround is to switch from using skeletal meshes to static meshes for your vehicles in UE4. This approach allows you to leverage the positional data received from SUMO effectively.

Step 2: Implementing the Movement

Retrieve Position Data: Utilize the positional x and y coordinates provided by SUMO.

Utilizing the Move Component To Node:

In UE4, use the “Move Component To” node, which allows you to animate the vehicles' movement based on the SUMO data.

Use the timing and frequency at which you receive data from SUMO to ensure the vehicles move realistically.

Step 3: Time Delta Consideration

Ensure that you incorporate the time delta when applying the movement commands. This step is crucial because it ensures movements are calculated over the elapsed time, making them smoother and more realistic.

Key Considerations

Smooth Transitions: While using the “Move Component To” node, make sure to account for how quickly or slowly vehicles accelerate based on the incoming acceleration values from SUMO.

Testing and Adjustments: After implementing the static meshes and movement logic, spend time testing the speeds and positions to ensure they correlate well with the data from SUMO.

Conclusion

While there might not be a direct method to set the throttle input for vehicles in UE4 using data from SUMO, the described workaround provides a viable solution to simulate realistic vehicle movements. By using static meshes and the “Move Component To” node effectively, you can create a synchronized driving experience that enhances the visualization of your traffic simulations.

By following these steps and adjusting the vehicle behaviors thoughtfully, you’re one step closer to perfecting your vehicle simulations in UE4. Happy developing!