Remove sensors from mass calculation + default mass/inertia = 1 for now

Author: darthdeus

blobs/src/collider.rs

@@ -42,6 +42,10 @@ impl Collider {
         inertia + mass * d.powi(2)
     }
 
+    pub fn is_sensor(&self) -> bool {
+        self.flags.is_sensor
+    }
+
     pub fn absolute_translation(&self) -> Vec2 {
         self.absolute_transform.translation
     }

blobs/src/rigid_body.rs

@@ -95,6 +95,10 @@ impl RigidBody {
 
         for col_handle in self.colliders.iter() {
             if let Some(collider) = &col_set.get(*col_handle) {
+                if collider.is_sensor() {
+                    continue;
+                }
+
                 let mass = collider.mass();
 
                 self.calculated_mass += mass;
@@ -106,6 +110,14 @@ impl RigidBody {
             }
         }
 
+        if self.calculated_mass == 0.0 {
+            self.calculated_mass = 1.0;
+        }
+
+        if self.inertia == 0.0 {
+            self.inertia = 1.0;
+        }
+
         self.center_of_mass = weighted_centers / self.calculated_mass;
     }