Steepness has no effect on rendering of the wave field

[M1chaelM]

Describe the bug See issue #650. Changing the steepness has no discernible effect on the visualization and we're not sure why. This may not be a bug, but it would be good to understand what's going on.

Expected behavior I expect that changing to steepness of the waves to a value closer to 1 would make the waves look more trochoidal and less sinusoidal.

To Reproduce List the steps to reproduce the problem:

1. Edit sydney_regatta.sdf to change steepness to 0.9:

   params {
    key: "steepness"
      value {
        type: DOUBLE
          double_value: 0.9
       }
    }
   }

2. Next, run 'ros2 launch vrx_gz competition.launch.py world:=sydney_regatta'
3. Note that the shape of the waves stays the same.

System Configuration: Tell us about your system.

• OS: Ubuntu 22.04
• ROS Version: ROS 2, Humble
• Gazebo Version: Gazebo Sim 7.0.0
• Graphics Card: Nvidia GTX 650
• Using VRX