Add README files to 3D demos

3d/ik/README.md

@@ -0,0 +1,22 @@
+# 3D Inverse Kinematics
+
+This is an example of different Inverse Kinematic algorithms
+implemented in Godot. It contains four scenes, showing
+different ways they can be used.
+
+Language: GDScript
+
+Renderer: GLES 3
+
+## How does it work?
+
+This demo shows how to implement IK using two different methods. One uses the
+[`SkeletonIK`](https://docs.godotengine.org/en/latest/classes/class_skeletonik.html)
+node which is built into Godot. The other method is using a script
+called FABRIK (inside of the SADE plugin) for inverse kinematics.
+
+## Screenshots
+
+![Screenshot](screenshots/cube.png)
+
+![Screenshot](screenshots/fps_gun.png)

3d/ik/project.godot

@@ -15,7 +15,7 @@ _global_script_class_icons={
 
 [application]
 
-config/name="3D IK"
+config/name="3D Inverse Kinematics"
 run/main_scene="res://look_at_ik.tscn"
 config/icon="res://icon.png"
 

3d/kinematic_character/README.md

@@ -0,0 +1,21 @@
+# 3D Kinematic Character
+
+Kinematic character demo for 3D using a cube for the character.
+This is similar to the 2D platformer demo.
+
+Language: GDScript
+
+Renderer: GLES 3
+
+## How does it work?
+
+This demo uses a [`KinematicBody`](https://docs.godotengine.org/en/latest/classes/class_kinematicbody.html)
+for the player, and [`StaticBody`](https://docs.godotengine.org/en/latest/classes/class_staticbody.html)
+for the level. Each has colliders, the player moves itself via
+`move_and_slide()` in `_physics_process()`, and collides with the level.
+
+## Screenshots
+
+![Screenshot](screenshots/ingame.png)
+
+![Screenshot](screenshots/editor.png)

3d/material_testers/README.md

@@ -0,0 +1,17 @@
+# Material Testers
+
+This demo includes many sphere-like objects with complex materials,
+for the purpose of showcasing Godot's rendering capabilities.
+
+This demo was featured at the beginning of the
+[Godot 3.0 trailer](https://www.youtube.com/watch?v=XptlVErsL-o).
+
+Language: GDScript
+
+Renderer: GLES 3
+
+## Screenshots
+
+![Screenshot](screenshots/stones.png)
+
+![Screenshot](screenshots/mirror.png)

3d/material_testers/project.godot

@@ -15,7 +15,7 @@ _global_script_class_icons={
 
 [application]
 
-config/name="Material Tester"
+config/name="Material Testers"
 run/main_scene="res://material_tester.tscn"
 config/icon="res://icon.png"
 
@@ -36,4 +36,3 @@ multithread/thread_rid_pool_prealloc=60
 
 vram_compression/import_etc2=false
 quality/filters/msaa=2
-environment/default_environment="res://default_env.tres"

3d/navmesh/README.md

@@ -0,0 +1,14 @@
+# 3D Navigation Mesh
+
+Navigation mesh demo for 3D scenes, with a character
+able to pathfind around a complex 3D environment.
+The navigation path is drawn using a line.
+Code is provided for polyline following in 3D.
+
+Language: GDScript
+
+Renderer: GLES 3
+
+## Screenshots
+
+![Screenshot](screenshots/nav.png)

3d/navmesh/project.godot

@@ -15,7 +15,7 @@ _global_script_class_icons={
 
 [application]
 
-config/name="Navmesh Demo"
+config/name="3D Navigation Mesh"
 run/main_scene="res://navmesh.tscn"
 config/icon="res://icon.png"
 

3d/platformer/README.md

@@ -0,0 +1,16 @@
+# 3D Platformer
+
+3D Platformer demo using a
+[`KinematicBody`](https://docs.godotengine.org/en/latest/classes/class_kinematicbody.html).
+It uses similar code to the 2D platformer, but implemented in 3D.
+It also features audio reverberation (it sounds echo-y).
+
+Language: GDScript
+
+Renderer: GLES 3
+
+## Screenshots
+
+![Screenshot](screenshots/face.png)
+
+![Screenshot](screenshots/shoot.png)

3d/truck_town/README.md

@@ -0,0 +1,27 @@
+# Truck Town
+
+This is a demo implementing different types of trucks of
+varying complexity using vehicle physics.
+
+Do not be surprised if everything is bouncy and glitchy,
+Godot's physics system is not polished and will likely be
+reworked in the future.
+
+Language: GDScript
+
+Renderer: GLES 2
+
+## How does it work?
+
+The base vehicle uses a
+[`VehicleBody`](https://docs.godotengine.org/en/latest/classes/class_vehiclebody.html)
+node. The trailer truck is tied together using a
+[`ConeJointTwist`](https://docs.godotengine.org/en/latest/classes/class_conetwistjoint.html)
+node, and the tow truck is tried together using a chain made of
+[`RigidBody`](https://docs.godotengine.org/en/latest/classes/class_rigidbody.html)
+nodes which are pinned together using
+[`PinJoint`](https://docs.godotengine.org/en/latest/classes/class_pinjoint.html) nodes.
+
+## Screenshots
+
+![Screenshot](screenshots/tow.png)