Updating the README.md. Renaming "threedee" to "volumetric".

README.md

@@ -5,6 +5,7 @@
 ### TL;DR
 
 - [Classic Matrix code](https://rezmason.github.io/matrix)
+- [3D mode](https://rezmason.github.io/matrix?volumetric=true)
 - [Operator Matrix code (with ripple effects)](https://rezmason.github.io/matrix?version=operator)
 - [Code of the "Nightmare Matrix"](https://rezmason.github.io/matrix?version=nightmare)
   - [(you know, this stuff).](http://matrix.wikia.com/wiki/Nightmare_Matrix)
@@ -34,8 +35,9 @@ While there have been a lot of attempts at #1 and #3, they're all missing import
 
 - **Get the right glyphs**. Like the actual ones. Everyone knows Matrix glyphs are some treatment of [Katakana](https://en.wikipedia.org/wiki/Katakana), but they also include a few characters from [Susan Kare's Chicago typeface](https://en.wikipedia.org/wiki/Chicago_(typeface)). The Matrix glyphs in *this* project come from the source: cleaned up vectors [from an old SWF](https://web.archive.org/web/20070914173039/http://www.atari.com:80/thematrixpathofneo/) for an official Matrix product, archived back in 2007. That's how deep this rabbit hole goes, friends.
 (Please support the [Internet Archive!](https://archive.org/about/))
-- **Make it look sweet in 2D**. This is not a cop-out. There is just no scene in the movies as iconic as the digital rain itself, and while depth effects are cool, they take away from these other details that make the difference between a goodtrix and a *greatrix*.
-- **The glyphs are in a *fixed grid* and *don't move*.** The "raindrops" we see in the 2D effect are changes in the brightness of symbols that occupy a column. To get a closer look at this, try setting the `fallSpeed` to a number close to 0.
+- **Make it look sweet in 2D.** This is not a cop-out. There is just no scene in the movies as iconic as the digital rain itself, and while depth effects are cool, they take away from these other details that make the difference between a goodtrix and a *greatrix*.
+- **Make it look sweet in 3D, too.** This is not me caving to pressure! To facilitate future support of stereoscopic and holographic displays, it makes sense to nail down a 3D variation.
+- **The 2D glyphs are in a *fixed grid* and *don't move*.** The "raindrops" we see in the 2D effect are changes in the brightness of symbols that occupy a column. To get a closer look at this, try setting the `fallSpeed` to a number close to 0.
 - **Get the glow and color right.** Matrix symbols aren't just some shade of phosphorous green; they're first given a bloom effect, and then get tone-mapped to the green color palette.
 - **Symbols change shape faster as they dim.** When symbols light up, they almost never change shape, but their cycle speed increases the darker and darker they get.
 - **Two "raindrops" can occupy the same column.** This is complicated, because we can't allow them to collide. A useful approach to thinking about this is, each column's glyph brightness is a kind of [sawtooth wave](http://mathworld.wolfram.com/SawtoothWave.html).
@@ -43,7 +45,7 @@ While there have been a lot of attempts at #1 and #3, they're all missing import
 - **Make it free, open source and web based.** Because someone could probably improve on what I've done, and I'd like to see that, and maybe incorporate their improvements back into this project.
 - **Support as many browsers and devices as possible.** This project used to rely on Three.js's GPUComputationRenderer, which only worked in browsers supporting WebGL's [oes_texture_float extension](https://caniuse.com/#search=OES_texture_float). The rewrite dropped this dependency, and gained support for a broader range of browsers and devices.
 - **Whip up some artistic license and depict the *previous* Matrix versions.** The sequels describe [a paradisiacal predecessor](https://rezmason.github.io/matrix?version=paradise) to the Matrix that was too idyllic, [and another earlier, nightmarish Hobbesian version](https://rezmason.github.io/matrix?version=nightmare) that proved too campy. They depict some programs running older, differently colored code, so it's time someone tried rendering them.
-- **Include the following statement in the README.md:** Sure, you can enjoy movies, including *The Matrix*, without reading too deeply into them, but if you're going to really think about a film, make it this one. And here's the thing: **The Matrix is a story about transitioning, directed by two siblings who transitioned**. So there! There's plenty more themes in it and its sequels than that, and plenty of room for interpretation, but no room for the misogynistic ideas that led to that gross subreddit we all know about. Wake up from your prejudices, boys. Here's a chance to open our minds, not shut them.
+- **Promote a progressive interpretation of the film franchise.** *The Matrix* is an action film you can enjoy without critical analysis, but if you do read into it, you'll be rewarded. And let's be clear: **The Matrix is a story about transitioning, directed by two siblings who transitioned**. This is undeniable. Its franchise has plenty more themes, and plenty of room for interpretation, but the widely known community of misogynists who claim this imagery for their movement cannot be tolerated in any form. This is a chance to open minds, not shut them.
 
 ---
 ### side note: other people's Matrix effects
@@ -69,9 +71,12 @@ Now you know link fu. Here's a list of customization options:
   - "paradise" is how the Matrix's idyllic predecessor may have appeared: warm, simplistic, encompassing.
   - "nightmare" is how the Matrix may have appeared in the Merovingian's heyday: flashy, foreboding, relentless.
 - **width** - the number of columns (and rows) to draw. Default is 80.
-- **slant** - which angle is up, in degrees. Default is 0.
-- **bloomSize** - The glow quality, from 0 to 1. Default is 0.5. Lowering this value may help the digital rain run smoother on your device.
-- **resolution** - The image size, relative to the window size. Default is 1. Lowering this value may improve your performance, especially on high pixel density displays.
+- **volumetric** - when set to "true", this renders the glyphs with depth, slowly approaching the eye. Default is "false".
+- **density** - the number of 3D raindrops to draw, proportional to the default. Default is 1.0.
+- **forwardSpeed** - the rate that the 3D raindrops approach. Default is 1.0.
+- **slant** - the angle that the 2D raindrops fall, in degrees. Default is 0.
+- **bloomSize** - the glow quality, from 0 to 1. Default is 0.5. Lowering this value may help the digital rain run smoother on your device.
+- **resolution** - the image size, relative to the window size. Default is 1. Lowering this value may improve your performance, especially on high pixel density displays.
 - **raindropLength** - the vertical scale of "raindrops" in the columns. Can be any number, even negative! Default is 1.0.
 - **animationSpeed** - the overall speed of the animation. Can be any number, even negative! Default is 1.0.
 - **fallSpeed** - the speed of the rain. Can be any number, even negative! Default is 1.0.