Add zoom cap to admin to keep zoom in a sensible range

By clamping zoom, panic due to float overflow is avoided

Regular player zoom cap is also reduced to a more sensible range

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 
 ### Fixed
+- Fixed crash due to zooming out very far
 
 ## [0.13.0] - 2022-07-23
 

voxygen/src/scene/camera.rs

@@ -541,7 +541,9 @@ impl Camera {
     }
 
     /// Zoom with the ability to switch between first and third-person mode.
-    pub fn zoom_switch(&mut self, delta: f32, cap: Option<f32>) {
+    ///
+    /// Note that cap > 18237958000000.0 can cause panic due to float overflow
+    pub fn zoom_switch(&mut self, delta: f32, cap: f32) {
         if delta > 0_f32 || self.mode != CameraMode::FirstPerson {
             let t = self.tgt_dist + delta;
             const MIN_THIRD_PERSON: f32 = 2.35;
@@ -561,9 +563,7 @@ impl Camera {
             }
         }
 
-        if let Some(cap) = cap {
-            self.tgt_dist = self.tgt_dist.min(cap);
-        }
+        self.tgt_dist = self.tgt_dist.min(cap);
     }
 
     /// Get the distance of the camera from the focus

voxygen/src/scene/mod.rs

@@ -44,7 +44,8 @@ use num::traits::{Float, FloatConst};
 use specs::{Entity as EcsEntity, Join, WorldExt};
 use vek::*;
 
-const ZOOM_CAP: f32 = 10000.0;
+const ZOOM_CAP_PLAYER: f32 = 1000.0;
+const ZOOM_CAP_ADMIN: f32 = 100000.0;
 
 // TODO: Don't hard-code this.
 const CURSOR_PAN_SCALE: f32 = 0.005;
@@ -380,10 +381,14 @@ impl Scene {
             },
             // Zoom the camera when a zoom event occurs
             Event::Zoom(delta) => {
+                let cap = if client.is_moderator() {
+                    ZOOM_CAP_ADMIN
+                } else {
+                    ZOOM_CAP_PLAYER
+                };
                 // when zooming in the distance the camera travelles should be based on the
                 // final distance. This is to make sure the camera travelles the
                 // same distance when zooming in and out
-                let cap = (!client.is_moderator()).then_some(ZOOM_CAP);
                 if delta < 0.0 {
                     self.camera.zoom_switch(
                         // Thank you Imbris for doing the math