3 files changed, 48 insertions, 3 deletions
diff --git a/doc/classes/Engine.xml b/doc/classes/Engine.xml
index 04e203793b..53ddde0e4a 100644
--- a/doc/classes/Engine.xml
+++ b/doc/classes/Engine.xml
@@ -41,7 +41,7 @@
 			<return type="int">
 			</return>
 			<description>
-				Returns the total number of frames drawn.
+				Returns the total number of frames drawn. If the render loop is disabled with [code]--disable-render-loop[/code] via command line, this returns [code]0[/code]. See also [method get_idle_frames].
 			</description>
 		</method>
 		<method name="get_frames_per_second" qualifiers="const">
@@ -51,6 +51,13 @@
 				Returns the frames per second of the running game.
 			</description>
 		</method>
+		<method name="get_idle_frames" qualifiers="const">
+			<return type="int">
+			</return>
+			<description>
+				Returns the total number of frames passed since engine initialization which is advanced on each [b]idle frame[/b], regardless of whether the render loop is enabled. See also [method get_frames_drawn].
+			</description>
+		</method>
 		<method name="get_license_info" qualifiers="const">
 			<return type="Dictionary">
 			</return>
@@ -72,6 +79,13 @@
 				Returns the main loop object (see [MainLoop] and [SceneTree]).
 			</description>
 		</method>
+		<method name="get_physics_frames" qualifiers="const">
+			<return type="int">
+			</return>
+			<description>
+				Returns the total number of frames passed since engine initialization which is advanced on each [b]physics frame[/b].
+			</description>
+		</method>
 		<method name="get_physics_interpolation_fraction" qualifiers="const">
 			<return type="float">
 			</return>
diff --git a/doc/classes/KinematicBody2D.xml b/doc/classes/KinematicBody2D.xml
index 1de75cd71b..470d8db47a 100644
--- a/doc/classes/KinematicBody2D.xml
+++ b/doc/classes/KinematicBody2D.xml
@@ -17,7 +17,7 @@
 			<return type="Vector2">
 			</return>
 			<description>
-                                Returns the normal vector of the floor.
+				Returns the normal vector of the floor.
 			</description>
 		</method>
 		<method name="get_floor_velocity" qualifiers="const">
diff --git a/doc/classes/bool.xml b/doc/classes/bool.xml
index 533963b460..ba6a932d4f 100644
--- a/doc/classes/bool.xml
+++ b/doc/classes/bool.xml
@@ -4,7 +4,38 @@
 		Boolean built-in type.
 	</brief_description>
 	<description>
-		Boolean built-in type.
+		Boolean is a built-in type. It can represent any data type that is either a true or false value. You can think of it as an switch with on or off (1 or 0) setting . It's often used as part of programming logic in condition statements like [code]if[/code] statements.
+		[b]Note:[/b] In a code below [code]if can_shoot[/code] is equivalent of [code]if can_shoot == true[/code]. It is good practice to follow the natural spoken language structure when possible. Use [code]if can_shoot[/code] rather than [code]if can_shoot == true[/code] and use [code]if not can_shoot[/code] rather than [code]if can_shoot == false[/code].
+		[codeblock]
+		var can_shoot = true
+
+		func shoot():
+		    if can_shoot:
+		        # Perform shooting actions here.
+		[/codeblock]
+		The following code will only create a bullet if both conditions are met: action "shoot" is pressed and if [code]can_shoot[/code] is [code]true[/code].
+		[b]Note:[/b] [code]Input.is_action_pressed("shoot")[/code] is also a boolean that is [code]true[/code] when "shoot" is pressed and [code]false[/code] when "shoot" isn't pressed.
+		[codeblock]
+		var can_shoot = true
+
+		func shoot():
+		    if can_shoot and Input.is_action_pressed("shoot"):
+		        create_bullet()
+		[/codeblock]
+		The following code will set [code]can_shoot[/code] to [code]false[/code] and start a timer. This will prevent player from shooting until the timer runs out. Next [code]can_shoot[/code] will be set to [code]true[/code] again allowing player to shoot once again.
+		[codeblock]
+		var can_shoot = true
+		onready var cool_down = $CoolDownTimer
+
+		func shoot():
+		    if can_shoot and Input.is_action_pressed("shoot"):
+		        create_bullet()
+		        can_shoot = false
+		        cool_down.start()
+
+		func _on_CoolDownTimer_timeout():
+		    can_shoot = true
+		[/codeblock]
 	</description>
 	<tutorials>
 	</tutorials>