Feature: Increase the customizability of prop_wall_projector

[luxeleios]

Which component should be improved?

Entity

Describe your suggestion

• VFX

  • Set custom model for the emitter (already available for lasers and cubes, and tractor beams to an extent)
  • Set custom vmt replacement for projected_wall.vmt, projected_wall_rail.vmt
  • Set custom wall end particles
  • Set custom bridge ambience sound
  • Set custom color for the bridge VFX, either both particles and materials, or just the materials

• Gameplay

  • Set bridge height (not thickness)
  • Allow users to define how a specific bridge config interacts with other entities:
    • Whether the players are allowed to shoot portals through it or not
    • Whether the bridge is solid to certain entities/entity classes or players or not (allow using a filter entity or a simple set of flags for this?)
    • Whether the bridge is blocking enemy LOS or not
    • Whether the bridge can be painted or not

• I/O

  • Fire an output when an entity touches the bridge or is standing on it
  • Fire an output or run a script for when an entity passes through/interacts with the bridge in any way based on the gameplay suggestions

[LambdaCore21]

Funnels are working, but bridges are not? https://github.com/StrataSource/Portal-2-Community-Edition/issues/139

[ozxybox]

Issue mentions filtering, potentially related to #268