Merge pull request #11352 from FigyTuna/physics_body_docs

[DOCS] Modified/Added documentation for PhysicsBody and PhysicsBody2D

doc/classes/PhysicsBody.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="PhysicsBody" inherits="CollisionObject" category="Core" version="3.0.alpha.custom_build">
 	<brief_description>
-		Base class for different types of Physics bodies.
+		Base class for all objects affected by physics in 3D space.
 	</brief_description>
 	<description>
-		PhysicsBody is an abstract base class for implementing a physics body. All PhysicsBody types inherit from it.
+		PhysicsBody is an abstract base class for implementing a physics body. All *Body types inherit from it.
 	</description>
 	<tutorials>
 	</tutorials>
@@ -17,7 +17,7 @@
 			<argument index="0" name="body" type="Node">
 			</argument>
 			<description>
-				Adds a body to the collision exception list. This list contains bodies that this body will not collide with.
+				Adds a body to the list of bodies that this body can't collide with.
 			</description>
 		</method>
 		<method name="get_collision_layer" qualifiers="const">
@@ -54,7 +54,7 @@
 			<argument index="0" name="body" type="Node">
 			</argument>
 			<description>
-				Removes a body from the collision exception list.
+				Removes a body from the list of bodies that this body can't collide with.
 			</description>
 		</method>
 		<method name="set_collision_layer">
@@ -96,8 +96,12 @@
 	</methods>
 	<members>
 		<member name="collision_layer" type="int" setter="set_collision_layer" getter="get_collision_layer">
+			The physics layers this area is in.
+			Collidable objects can exist in any of 32 different layers. These layers work like a tagging system, and are not visual. A collidable can use these layers to select with which objects it can collide, using the collision_mask property.
+			A contact is detected if object A is in any of the layers that object B scans, or object B is in any layer scanned by object A.
 		</member>
 		<member name="collision_mask" type="int" setter="set_collision_mask" getter="get_collision_mask">
+			The physics layers this area can scan for collisions.
 		</member>
 	</members>
 	<constants>

doc/classes/PhysicsBody2D.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="PhysicsBody2D" inherits="CollisionObject2D" category="Core" version="3.0.alpha.custom_build">
 	<brief_description>
-		Base class for all objects affected by physics.
+		Base class for all objects affected by physics in 2D space.
 	</brief_description>
 	<description>
 		PhysicsBody2D is an abstract base class for implementing a physics body. All *Body2D types inherit from it.
@@ -17,6 +17,7 @@
 			<argument index="0" name="body" type="Node">
 			</argument>
 			<description>
+				Adds a body to the list of bodies that this body can't collide with.
 			</description>
 		</method>
 		<method name="get_collision_layer" qualifiers="const">
@@ -57,6 +58,7 @@
 			<argument index="0" name="body" type="Node">
 			</argument>
 			<description>
+				Removes a body from the list of bodies that this body can't collide with.
 			</description>
 		</method>
 		<method name="set_collision_layer">
@@ -104,10 +106,15 @@
 	</methods>
 	<members>
 		<member name="collision_layer" type="int" setter="set_collision_layer" getter="get_collision_layer">
+			The physics layers this area is in.
+			Collidable objects can exist in any of 32 different layers. These layers work like a tagging system, and are not visual. A collidable can use these layers to select with which objects it can collide, using the collision_mask property.
+			A contact is detected if object A is in any of the layers that object B scans, or object B is in any layer scanned by object A.
 		</member>
 		<member name="collision_mask" type="int" setter="set_collision_mask" getter="get_collision_mask">
+			The physics layers this area can scan for collisions.
 		</member>
 		<member name="layers" type="int" setter="_set_layers" getter="_get_layers">
+			Both collision_layer and collision_mask. Returns collision_layer when accessed. Updates collision_layers and collision_mask when modified.
 		</member>
 	</members>
 	<constants>