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demos/README.md

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+# Demos
 
+## [`cube`](https://jon-edward.github.io/nephropidae_wasm/demos/cube)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/cube.lobster](https://github.com/aardappel/lobster/blob/master/samples/cube.lobster). 
 
+<details open>
+<summary>Description</summary>
+<pre>
+This example renders a cube with a different colorèd number on each face.
+Moving the mouse or WASD rotates the viewport around the cube like turning a
+globe in front of the camera.
+
+The example illustrates creating a simple mesh and rendering a texture on
+the mesh in various orientations.
+The example showcases the render_to_texture utility, which allows us to
+render a 2D drawing on the surfaces of a 3D object, using a frame buffer.
+The example also demostrates using gl.new_mesh, which allows us to orient
+the texture on each face of the cube, since the simpler gl.new_poly is not
+quite sufficient for this purpose.
+
+To generate the mesh for each face, cube_face_meshes uses the three least
+significant bits of ASCII characters to represent whether the edge is on the
+near or far side of the cube along each axis.
+
+ -----ZYX CHR corner
+ 00110000 '0' origin
+ 00110001 '1' x
+ 00110010 '2' y
+ 00110011 '3' xy
+ 00110100 '4' z
+ 00110101 '5' xz
+ 00110110 '6' yz
+ 00110111 '7' zyz
+
+Each face of the cube contains four of the cube's vertices.
+The normal vector for the face of the cube must face outward to be opaque to
+an outside observer, so the vertices are listed counter-clockwise.
+In the following illustration, the interior faces are inverted, so the
+vertices appear in clockwise order from our perspective.
+
+The first index must be the top-right corner of the texture.
+The textures are arranged such that the textures are upright around the
+equator and the poles are connected top to bottom with their nearest
+neighbor.
+Rotating the vertex strings rotates the corresponding texture orientation.
+
+The faces are numbered according to the conventions of right-handed dice.
+All faces in opposition have the same sum.
+Numbers read counter-clockwise about the origin and its opposite vertex.
+
+                                 inverted clockwise
+ Z       4---5             .---.   .---.
+  \      |\  |\    1540->2 |\ 2 \  |   |\  6<-5464
+   0--X  | 0---1           | .---. | 6 | .
+   |     | | | |   0462->3 |3|   | |   |4| 4<-5137
+   Y     6-|-7 |           ' | 1 | '---' |
+          \|  \|   3102->1  \|   |  \ 5 \| 5<-7326
+           2---3             '---'   '---'
+                   counter-clockwise
+
+Kris Kowal &lt;[email protected]&gt;</pre>
+</details>
+
+## [`lobstercraft`](https://jon-edward.github.io/nephropidae_wasm/demos/lobstercraft/)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/lobstercraft.lobster](https://github.com/aardappel/lobster/blob/master/samples/lobstercraft.lobster).
+
+<details open>
+<summary>Description</summary>
+<pre>
+A minecraft clone in very few lines of code implements random world generation, 
+chunks, rendering, and mining/building of blocks created in response to https://github.com/fogleman/Minecraft 
+(which is 10x bigger in code).
+</pre>
+</details>
+
+## [`pendulum`](https://jon-edward.github.io/nephropidae_wasm/demos/pendulum/)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/pendulum.lobster](https://github.com/aardappel/lobster/blob/master/samples/pendulum.lobster). 
+
+<details open>
+<summary>Description</summary>
+<pre>
+based on: http://www.physicsandbox.com/projects/double-pendulum.html</pre>
+</details>
+
+
+## [`physics_boxes`](https://jon-edward.github.io/nephropidae_wasm/demos/physics_boxes/)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/physics_boxes.lobster](https://github.com/aardappel/lobster/blob/master/samples/physics_boxes.lobster). 
+
+<details open>
+<summary>Docstring</summary>
+<pre>
+Showing off physics features in Lobster</pre>
+</details>
+
+
+## [`physics_water`](https://jon-edward.github.io/nephropidae_wasm/demos/physics_water/)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/physics_water.lobster](https://github.com/aardappel/lobster/blob/master/samples/physics_water.lobster). 
+
+<details open>
+<summary>Docstring</summary>
+<pre>
+Showing off physics features in Lobster</pre>
+</details>
+
+
+## [`pythtree`](https://jon-edward.github.io/nephropidae_wasm/demos/pythtree/)
+Taken from [https://github.com/aardappel/lobster/blob/master/samples/pythtree.lobster](https://github.com/aardappel/lobster/blob/master/samples/pythtree.lobster). 
+
+<details open>
+<summary>Docstring</summary>
+<pre>
+graphics demo showing an animated "tree of pythagoras"</pre>
+</details>