feat: add sinusoidal wave motion to the emitter

[VmMad]

Description of change

Fixes #893

Type of change

• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

Visualizer

Change checklist

• My code follows the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes