custom charge magnitude

also: s/charge/particle
to reduce confusion

index.html

@@ -86,16 +86,16 @@ aside > container > div {
 <button id="button-surface-earth" onclick="set_surface(SURFACE_EARTH)">Earth</button>
 </div>
 <div>
-<button onclick="make_charges(0);faces=[]">0</button>
-<button onclick="make_charges(1);faces=[]">1</button>
-<button onclick="make_charges(2);faces=[]">2</button>
-<button onclick="make_charges(3);faces=[]">3</button>
-<button onclick="make_charges(4);faces=[]">4</button>
-<button onclick="make_charges(5);faces=[]">5</button>
-<button onclick="make_charges(6);faces=[]">6</button>
-<button onclick="make_charges(7);faces=[]">7</button>
-<button onclick="make_charges(8);faces=[]">8</button>
-<button onclick="make_charges(9);faces=[]">9</button>
+<button onclick="make_particles(0);faces=[]">0</button>
+<button onclick="make_particles(1);faces=[]">1</button>
+<button onclick="make_particles(2);faces=[]">2</button>
+<button onclick="make_particles(3);faces=[]">3</button>
+<button onclick="make_particles(4);faces=[]">4</button>
+<button onclick="make_particles(5);faces=[]">5</button>
+<button onclick="make_particles(6);faces=[]">6</button>
+<button onclick="make_particles(7);faces=[]">7</button>
+<button onclick="make_particles(8);faces=[]">8</button>
+<button onclick="make_particles(9);faces=[]">9</button>
 </div>
 </container>
 </aside>