Add some links to the documentation

docs/src/appendix.md

@@ -1,6 +1,11 @@
 # Appendix
 
 
+## Challenges:
+
+* Accuracy of floating point numbers is very bad for big world view coordinates ([Plot](https://en.wikipedia.org/wiki/IEEE_754#/media/File:IEEE754.svg))
+* [Perils of World Space](https://paroj.github.io/gltut/Positioning/Tut07%20The%20Perils%20of%20World%20Space.html)
+
 ## Future Ideas
 
 * Use [rust-gpu](https://github.com/EmbarkStudios/rust-gpu) as shading language

docs/src/architecture.md

@@ -3,6 +3,12 @@
 
 ## GPU Architecture
 
+The big picture of wgpu is as follows:
+
+![](https://raw.githubusercontent.com/gfx-rs/wgpu/8f02b73655aff641361822a8ac0347fc47622b49/etc/big-picture.png)
+
+A simplified version is shown below:
+
 ![](./figures/gpu-stack.drawio.svg)
 
 Notes:

docs/src/further_technical_reading.md

@@ -86,6 +86,12 @@ Projects:
 * [SDF Render](https://docs.rs/sdf_glyph_renderer/latest/sdf_glyph_renderer/)
 * [pbf_font_tools](https://github.com/stadiamaps/pbf_font_tools)
 
+## Tesselation
+
+Projects:
+
+* [earcutr](https://github.com/donbright/earcutr)
+
 ## Render Graphs
 
 * https://github.com/metal-by-example/simple-instancing/blob/master/MetalSimpleInstancing/Renderer.swift