adjusted zoom to fit ratio

.ladd

@@ -0,0 +1 @@
+Hi :P

Layout.md

@@ -0,0 +1,23 @@
+Overlay > Info Box
+
+Each toolbar gives itself a header tool which expands/collapses the toolbar.
+
+- Toolbar Group: Left Side
+  - Toolbar: Tools
+    - Tool: Zoom
+  - Toolbar: Modes
+    - Tool: Mode Switch
+  - Toolbar: Utils
+    - Tool: Utility Tool
+- Toolbar Group: Right Side
+  - Toolbar: Options
+    - Tool: Options Tool
+      - Section: Pause During
+      - Section: Display
+      - Section: Collision
+  - Toolbar: Params
+    - Tool: Options Tool
+      - Section: Param
+  - Toolbar: Debug
+    - Tool: Options Tool
+      - Section: Debug

tool/zoom.js

@@ -60,9 +60,8 @@ export class Zoom extends Tool {
       const y = (box.start.y + box.end.y) / 2;
       const widthRatio = Math.abs(box.start.x - box.end.x) / this.sim.display.width;
       const heightRatio = Math.abs(box.start.y - box.end.y) / this.sim.display.height;
-      const biggerRatio = Math.max(widthRatio, heightRatio);
-      const base2factor = Math.log2(1 / biggerRatio) - 1;
-      const factor = Math.ceil(base2factor);
+      const ratio = Math.max(widthRatio, heightRatio) * 2.5;
+      const factor = Math.ceil(Math.log2(1 / ratio));
 
       // Determine average momentum and set panning velocity to match
       const { netMomentum, totalMass } = this.sim.system.computeSystemCenter();