Improve hitboxes for knives and shivs to better match their sprites (#39100)

* update hitbox for kitchen knife and butcher's cleaver

* update hitbox for the 4 glass type shivs

* update hitbox for the medical shiv

* Update the hitbox for the plastic knife

* review

---------

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

Resources/Prototypes/Entities/Objects/Misc/utensils.yml

@@ -130,6 +130,17 @@
     - Plastic
     - Trash
     - Knife
+  - type: Fixtures
+    fixtures:
+      fix1:
+        shape: !type:PhysShapeAabb
+          bounds: "-0.1,-0.375,0.1,0.375"
+        density: 20 # derived from base_item
+        mask:
+        - ItemMask
+        restitution: 0.3
+        friction: 0.2
+
 
 - type: entity
   parent: UtensilBase

Resources/Prototypes/Entities/Objects/Specific/Medical/surgery.yml

@@ -101,6 +101,17 @@
     state: shiv
   - type: Item
     heldPrefix: shiv
+  - type: Fixtures
+    fixtures:
+      fix1:
+        shape: !type:PhysShapeAabb
+          bounds: "-0.375,-0.15,0.35,0.12"
+        density: 20 # derived from base_item
+        mask:
+        - ItemMask
+        restitution: 0.3
+        friction: 0.2
+
 
 - type: entity
   name: advanced scalpel

Resources/Prototypes/Entities/Objects/Weapons/Melee/knife.yml

@@ -49,6 +49,20 @@
     guides:
     - Chef
     - FoodRecipes
+  - type: Fixtures
+    fixtures:
+      fix1:
+        shape: !type:PolygonShape
+          vertices:
+          - -0.475,-0.225
+          - -0.225,-0.475
+          - 0.525,0.275
+          - 0.275,0.525
+        density: 20 # derived from base_item
+        mask:
+        - ItemMask
+        restitution: 0.3
+        friction: 0.2
 
 - type: entity
   name: butcher's cleaver
@@ -76,6 +90,20 @@
     guides:
     - Chef
     - FoodRecipes
+  - type: Fixtures
+    fixtures:
+      fix1:
+        shape: !type:PolygonShape
+          vertices:
+          - -0.58,-0.12
+          - -0.34,-0.55
+          - 0.6,-0.075
+          - 0.375,0.375
+        density: 20 # derived from base_item
+        mask:
+        - ItemMask
+        restitution: 0.3
+        friction: 0.2
 
 - type: entity
   name: combat knife
@@ -117,7 +145,6 @@
     fixtures:
       fix1:
         shape: !type:PolygonShape
-          radius: 0.01
           vertices:
           - -0.4,-0.2
           - -0.2,-0.4
@@ -227,6 +254,20 @@
     sprite: Objects/Weapons/Melee/shiv.rsi
   - type: DisarmMalus
     malus: 0.225
+  - type: Fixtures
+    fixtures:
+      fix1:
+        shape: !type:PolygonShape
+          vertices:
+          - -0.365,-0.265
+          - 0.077,-0.45
+          - 0.364,0.323
+          - -0.0735,0.49
+        density: 20 # derived from base_item
+        mask:
+        - ItemMask
+        restitution: 0.3
+        friction: 0.2
 
 - type: entity
   name: reinforced shiv