Welcome to the GlPortal issue tracker. New to the project? Try our simple tasks.

  • Status New
  • Percent Complete
  • Task Type Feature Request
  • Category Backend / Core
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Low
  • Reported Version Development
  • Due in Version Undecided
  • Due Date Undecided
  • Votes 1
  • Private
Attached to Project: GlPortal
Opened by Dorian Wouters - 15.10.2015
Last edited by Henry Hirsch - 15.10.2015

FS#75 - Fizzlers appearance

Portal 2's fizzlers / emancipation grids have a water-caustics-looking appearance (in fact they are generated caustics textures, colored and animated in a Perlin noise octave fashion).

On this image, the upper left one is the "modern" look, and the upper right one is the  is the "old Aperture" look. Other fields colors are not part of the original game and has different purposes.

Inspired by this design, our fields can look similar but better by actually making them 2D water simulations, more popularly known as the "ripple effect", as popularized by this article. Here are a few HTML5 example implementations: 1, 2, 3, 4.

As described in the design ideas document, those fields would have their emitters stuck to the wall, either recessing or part of it. These could, on the 2D water sim, constantly create waves by setting the said simulation "pixels" to a sine function of time. Additionally, interaction from the player or any other physical object would actually make waves as the said object passes through the field. This effect should be able to be disabled and tweaked (resolution setting) in the settings, as it implies some rather heavyweight CPU-side computation and frequent CPU -> GPU texture uploads, which is limited by bus bandwidth. Use interpolation to our advantage.

However, due to the current (portal closing/portal bullet vanishing, object dissolving, player killing) and future different stacking functionality a single field can have, we must ensure the visual signals indicating those functionalities are stackable too. First off, R+G+B colors addition could do the trick. For further functions, things such as particles is an idea.

Date User Effort (H:M)


Available keyboard shortcuts

Task List

Task Details

Add/Edit Task

TODO:complete the list
for accesskey usage different shortcuts on Windows, Mac, Linux .., currently shown for Firefox