Add a variety of altitude markers

There is no system in place to migrate configs, so this
breaks slightly for people with saved configs. Should
try resolving that in the future.

macrovision.js

@@ -602,7 +602,7 @@ function drawScales(ifDirty = false) {
     ctx.fill();
 
 
-    if (config.drawYAxis || config.drawAltitudes) {
+    if (config.drawYAxis || config.drawAltitudes !== "none") {
         drawVerticalScale(ifDirty);
     }
     if (config.drawXAxis) {
@@ -728,22 +728,39 @@ function drawVerticalScale(ifDirty = false) {
         drawTicks(ctx, pixelsPer, heightPer);
     }
 
-    if (config.drawAltitudes) {
+    if (config.drawAltitudes == "atmosphere" || config.drawAltitudes == "all") {
         drawAltitudeLine(ctx, math.unit(8, "km"), "Troposphere");
         drawAltitudeLine(ctx, math.unit(50, "km"), "Stratosphere");
         drawAltitudeLine(ctx, math.unit(85, "km"), "Mesosphere");
         drawAltitudeLine(ctx, math.unit(675, "km"), "Thermosphere");
         drawAltitudeLine(ctx, math.unit(10000, "km"), "Exosphere");
+    }
+    
+    if (config.drawAltitudes == "orbits" || config.drawAltitudes == "all") {
+        drawAltitudeLine(ctx, math.unit(7, "miles"), "Cruising Altitude");
         drawAltitudeLine(ctx, math.unit(211.3, "miles"), "Space Station");
         drawAltitudeLine(ctx, math.unit(369.7, "miles"), "Hubble Telescope");
         drawAltitudeLine(ctx, math.unit(1500, "km"), "Low Earth Orbit");
         drawAltitudeLine(ctx, math.unit(20350, "km"), "GPS Satellites");
         drawAltitudeLine(ctx, math.unit(35786, "km"), "Geosynchronous Orbit");
         drawAltitudeLine(ctx, math.unit(238900, "miles"), "Lunar Orbit");
-        drawAltitudeLine(ctx, math.unit(7, "miles"), "Cruising Altitude");
+    }
+    
+    if (config.drawAltitudes == "weather" || config.drawAltitudes == "all") {
         drawAltitudeLine(ctx, math.unit(1000, "meters"), "Low-level Clouds");
         drawAltitudeLine(ctx, math.unit(3000, "meters"), "Mid-level Clouds");
     }
+        
+    if (config.drawAltitudes == "water" || config.drawAltitudes == "all") {
+        drawAltitudeLine(ctx, math.unit(12100, "feet"), "Average Ocean Depth");
+        drawAltitudeLine(ctx, math.unit(8376, "meters"), "Milkwaukee Deep");
+        drawAltitudeLine(ctx, math.unit(10984, "meters"), "Challenger Deep");
+        drawAltitudeLine(ctx, math.unit(5550, "meters"), "Molloy Deep");
+        drawAltitudeLine(ctx, math.unit(7290, "meters"), "Sunda Deep");
+        drawAltitudeLine(ctx, math.unit(592, "meters"), "Crater Lake");
+        drawAltitudeLine(ctx, math.unit(7.5, "meters"), "Littoral Zone");
+        drawAltitudeLine(ctx, math.unit(140, "meters"), "Continental Shelf");
+    }
 }
 
 // this is a lot of copypizza...
@@ -2034,8 +2051,16 @@ const settingsData = {
     "show-altitudes": {
         name: "Show Altitudes",
         desc: "Draw interesting altitudes",
-        type: "toggle",
-        default: true,
+        type: "select",
+        default: "none",
+        options: [
+            "none",
+            "all",
+            "atmosphere",
+            "orbits",
+            "weather",
+            "water"
+        ],
         get value() {
             return config.drawAltitudes;
         },