Use Pavel fluid simulation with point-cloud emitters

[Lyptik]

Goal

Make the WebDemo visuals match Pavel Dobryakov's WebGL Fluid Simulation as closely as possible, while replacing mouse/multitouch input with Augmenta point-cloud emitters.

Implementation

• ports the reference rendering pipeline from PavelDoGreat/WebGL-Fluid-Simulation pinned at a2d292931f19d9b3b9f564e23e6c32729d2121c3
• preserves the upstream default visual parameters:
  • SIM_RESOLUTION 128
  • DYE_RESOLUTION 1024 (512 on mobile / no linear filtering, as upstream)
  • DENSITY_DISSIPATION 1
  • VELOCITY_DISSIPATION 0.2
  • PRESSURE 0.8 / 20 iterations
  • CURL 30
  • SPLAT_RADIUS 0.25
  • SPLAT_FORCE 6000
  • shading, bloom and sunrays with the original defaults
• includes the original LDR_LLL1_0.png dithering texture
• removes mouse/touch/random-splat input from the embedded engine
• evenly subsamples each Augmenta point cloud into pointer-equivalent emitters
• uses sampled point displacement as the pointer delta, with cluster velocity as a fallback if point ordering jumps
• shares a bounded emitter budget across simultaneous point clouds to stay close to multi-touch behavior and avoid oversaturating the reference simulation
• keeps Pavel's colorful pointer-color behavior
• simplifies the Visuals section to one Fluid simulation toggle
• keeps the original Three.js viewer underneath as the fallback when fluid visuals are disabled or unsupported
• adds focused tests for point-cloud sampling, projection, emitter budgets, and preservation of upstream defaults
• ships the dithering texture through the existing Pages assembly flow

Version: 0.3.0