Features, system scenarios and use cases
Features
On this section, we explore the main features of the CARLA Simulator and the ROS-Bridge package
The Carla Simulator has the following main features:
The ROS-Bridge package has the following main features:
Scenarios
This section will exemplify four possible scenarios of different type of users taking advantage of the Carla Simulator game.
Start the Simulator
John, an average consumer has the Carla Simulator installed on his computer. He decides to start the simulator to be able to play, so he selects the vehicle he wants to play and is now able to interact with the Carla World.
Meanwhile, on the another Peter was able to see John playing the simulator via the ROS-Bridge package as well as all the other players.
Starting a Game
John, already enrolled with the simulator, now has the ability to play with another vehicle, selected by the system. Peter, with the ROS-Bridge is able to see the moves that John and the other players are making, as well as other objects present in the simulator.
Watching a Game
Sarah only wishes to follow one player in the Carla World. On the ROS-Bridge interface she chooses "watch", and selects a vehicle. Sarah is able to stop watching anytime and choose another player to watch.
Monitoring the CARLA World
On the ROS-Bridge Peter can monitor all the aspects of the Carla World, adding new objects like NPCS(Pedestrians/Vehicles) to the world.
Use cases
On this section, we expose the most important use cases on the system, according to the frequency of use.
Carla Simulator
| Use case | Play a game |
|---|---|
| Description | The user is able to play the Carla simulator with a certain vehicle using their keyboard. |
| Exceptions | The player is spawned in a random location in the Carla world. |
| Priority | High |
| Other information | To be able to play simulator the player needs to start the CarlaUE4.sh script and play the manual_control python script |
| Use case | Watching a game |
|---|---|
| Description | A user can watch a game taking place in the CARLA World, through a interface that allows the selection of the vehicle that you want to follow. |
| Exceptions | If there are no vehicles present in the world the user cannot watch the game |
| Priority | Medium |
| Other information | -- |
ROS-Bridge
| Use case | Watching a game |
|---|---|
| Description | A user can access the ROS-Bridge, select a vehicle and follow that vehicle throughout the Carla World. |
| Exceptions | If there are no vehicles present in the world the user cannot watch the game. |
| Priority | High |
| Other information | Depending on the simulation happening at the moment of viewing the user can see the moves being made by the players in real time. |
| Use case | See game and vehicle and other world statistics |
|---|---|
| Description | A user of the Web UI can access statistics of each simulation and each vehicle that exists in the platform |
| Exceptions | -- |
| Priority | High |
| Other information | -- |