update src/TODO.md

src/TODO.md

@@ -1,4 +1,14 @@
 * enhanced sphere tracing (mercury paper)
 * better materials
-* ferris's dull material raymarching method ([logicoma - engage breakdown](https://www.youtube.com/watch?v=woqksTHNbvk))
-* lighting and reflections
+    - ferris's dull material raymarching method ([logicoma - engage breakdown](https://www.youtube.com/watch?v=woqksTHNbvk))
+    - emissive materials
+    - reflections
+* node-based shaders and buffers
+    - Model/View based architecture
+        + Model
+        + node view
+        + render combined view+controller
+* inputs
+    - Audio analysis
+        + Beat detection
+        + FFTs