Update readme.

README.md

@@ -21,6 +21,14 @@ Run simple and advanced [examples] in your browser using [WebAssembly] and [WebG
 [WebAssembly]: https://en.wikipedia.org/wiki/WebAssembly
 [WebGL]: https://en.wikipedia.org/wiki/WebGL
 
+## Camera Modes
+
+Supports multiple camera modes:
+
+  * Trackball mode rotates camera around target.
+  * First-Person mode rotates target around camera.
+  * Spectator mode translates target and camera.
+
 ## Coherence Features
 
 This is an alternative trackball technique using exponential map and parallel transport to
@@ -38,7 +46,7 @@ away from the screen’s center (e.g., the rotation accelerates towards the edge
   * Coherent and intuitive orbiting via the exponential map, see the underlying [`trackball`]
     crate which follows the recipe given in the paper of Stantchev, G.. “Virtual Trackball
     Modeling and the Exponential Map.”. [S2CID] [44199608]. See the [`exponential_map`] example.
-  * Coherent first person view aka free look or mouse look with the world trackball centered at
+  * Coherent first-person mode aka free look or mouse look with the world trackball centered at
     eye instead of target.
   * Coherent scaling by translating mouse wheel device units, see [`TrackballWheelUnit`]. Scales
     eye distance from current cursor position or centroid of finger positions projected onto
@@ -52,9 +60,9 @@ away from the screen’s center (e.g., the rotation accelerates towards the edge
 [S2CID]: https://en.wikipedia.org/wiki/S2CID_(identifier)
 [44199608]: https://api.semanticscholar.org/CorpusID:44199608
 
-[`trackball`]: https://docs.rs/trackball/latest/trackball/
-[`TrackballWheelUnit`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballWheelUnit.html
-[`TrackballVelocity`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballVelocity.html
+[`trackball`]: https://qu1x.github.io/bevy_trackball/doc/trackball/index.html
+[`TrackballWheelUnit`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/enum.TrackballWheelUnit.html
+[`TrackballVelocity`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/enum.TrackballVelocity.html
 
 ## Additional Features
 
@@ -98,15 +106,20 @@ Mouse (Buttons)         | Touch (Fingers)         | Keyboard | Operation
 ----------------------- | ----------------------- | -------- | ---------------------------------
 Left Press + Drag       | One + Drag              | `ijkl`   | Orbits around target.
 ↳ at trackball's border | Two + Roll              | `uo`     | Rolls about view direction.
-Middle Press + Drag     | Any + Drag + Left Shift | `↑←↓→`   | First person view.
+Middle Press + Drag     | Any + Drag + Left Shift | `↑←↓→`   | First-person mode.
 Right Press + Drag      | Two + Drag              | `esdf`   | Slides trackball on focus plane.
                    |                    | `gv`     | Slides trackball in/out.
 Scroll In/Out           | Two + Pinch Out/In      | `hn`     | Scales distance zooming in/out.
 Left Press + Release    | Any + Release           |     | Slides to cursor/finger position.
+                   |                    | `m`      | Toggle `esdf`/`wasd` mapping.
                    |                    | `p`      | Toggle orthographic/perspective.
                    |                    | `Return` | Reset camera transform.
 
-[`TrackballInput`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballInput.html
+Alternatively, [`TrackballInput::map_wasd`] maps `wasd`/`Space`/`ControlLeft` to slide
+operations where `wd` slides in/out and `Space`/`ControlLeft` slides up/down (jump/crouch).
+
+[`TrackballInput`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/struct.TrackballInput.html
+[`TrackballInput::map_wasd`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/struct.TrackballInput.html#method.map_wasd
 
 ## Usage
 
@@ -139,10 +152,10 @@ fn setup(mut commands: Commands) {
 }
 ```
 
-[`TrackballPlugin`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballPlugin.html
-[`TrackballController`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballController.html
-[`TrackballCamera`]: https://docs.rs/bevy_trackball/latest/bevy_trackball/struct.TrackballCamera.html
-[`Camera3dBundle`]: https://docs.rs/bevy/latest/bevy/core_pipeline/core_3d/struct.Camera3dBundle.html
+[`TrackballPlugin`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/struct.TrackballPlugin.html
+[`TrackballController`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/struct.TrackballController.html
+[`TrackballCamera`]: https://qu1x.github.io/bevy_trackball/doc/bevy_trackball/struct.TrackballCamera.html
+[`Camera3dBundle`]: https://qu1x.github.io/bevy_trackball/doc/bevy/core_pipeline/core_3d/struct.Camera3dBundle.html
 
 [examples]: https://qu1x.github.io/bevy_trackball/examples
 [`exponential_map`]: https://qu1x.github.io/bevy_trackball/examples/exponential_map.html