update README instruction

README.md

@@ -52,7 +52,7 @@ For live experience (meaning you enter the container), run:
 If you change code in `src`, you need to rebuild the image with `bash build/build-image.sh`. The `src` folder can also be mounted in the image, but the assumption is that life is already difficult as it is...
 
 ### interactive simulation
-
+In the `public` directory
 - Run `python -m http.server`
 - Go to `http://localhost:8000/public`
 

public/threebody.py

@@ -102,7 +102,7 @@ def replot_canvas():
 
     COM = np.sum(globals['m']) * (globals['m'][0] * x[0, :] + globals['m'][1] * x[1, :] + globals['m'][2] * x[2, :])
 
-    obs = document.getElementById("angular_mom")
+    obs = document.getElementById("obs")
     s = f"L0 = {L0:.6f}Ẑ<br>L1 = {L1:.6f}Ẑ<br>L2 = {L2:.6f}Ẑ<br>L_tot = {L_tot:.6f}Ẑ<br><br>E = {E():.6f}<br> COM = {COM[0]:.6f}X̂, {COM[1]:.6f}Ŷ<br> P_tot = {P_tot[0]:.6f}X̂, {P_tot[1]:.6f}Ŷ"
     obs.innerHTML = s