Add LOTS of missing docs

doc/classes/AnimatedSprite.xml

@@ -61,8 +61,10 @@
 			If [code]true[/code], the [member animation] is currently playing.
 		</member>
 		<member name="shininess" type="float" setter="set_shininess" getter="get_shininess" default="1.0">
+			Strength of the specular light effect of this [AnimatedSprite].
 		</member>
 		<member name="specular_color" type="Color" setter="set_specular_color" getter="get_specular_color" default="Color( 1, 1, 1, 1 )">
+			The color of the specular light effect.
 		</member>
 		<member name="speed_scale" type="float" setter="set_speed_scale" getter="get_speed_scale" default="1.0">
 			The animation speed is multiplied by this value.

doc/classes/Animation.xml

@@ -14,7 +14,7 @@
 		animation.track_insert_key(track_index, 0.0, 0)
 		animation.track_insert_key(track_index, 0.5, 100)
 		[/codeblock]
-		Animations are just data containers, and must be added to nodes such as an [AnimationPlayer] to be played back.
+		Animations are just data containers, and must be added to nodes such as an [AnimationPlayer] to be played back. Animation tracks have different types, each with its own set of dedicated methods. Check [enum TrackType] to see available types.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/index.html</link>
@@ -39,6 +39,7 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the animation name at the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of an Animation Track.
 			</description>
 		</method>
 		<method name="animation_track_insert_key">
@@ -51,6 +52,7 @@
 			<argument index="2" name="animation" type="StringName">
 			</argument>
 			<description>
+				Inserts a key with value [code]animation[/code] at the given [code]time[/code] (in seconds). The [code]track_idx[/code] must be the index of an Animation Track.
 			</description>
 		</method>
 		<method name="animation_track_set_key_animation">
@@ -63,6 +65,7 @@
 			<argument index="2" name="animation" type="StringName">
 			</argument>
 			<description>
+				Sets the key identified by [code]key_idx[/code] to value [code]animation[/code]. The [code]track_idx[/code] must be the index of an Animation Track.
 			</description>
 		</method>
 		<method name="audio_track_get_key_end_offset" qualifiers="const">
@@ -73,6 +76,8 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the end offset of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
+				End offset is the number of seconds cut off at the ending of the audio stream.
 			</description>
 		</method>
 		<method name="audio_track_get_key_start_offset" qualifiers="const">
@@ -83,6 +88,8 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the start offset of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
+				Start offset is the number of seconds cut off at the beginning of the audio stream.
 			</description>
 		</method>
 		<method name="audio_track_get_key_stream" qualifiers="const">
@@ -93,6 +100,7 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the audio stream of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
 			</description>
 		</method>
 		<method name="audio_track_insert_key">
@@ -109,6 +117,8 @@
 			<argument index="4" name="end_offset" type="float" default="0">
 			</argument>
 			<description>
+				Inserts an Audio Track key at the given [code]time[/code] in seconds. The [code]track_idx[/code] must be the index of an Audio Track.
+				[code]stream[/code] is the [AudioStream] resource to play. [code]start_offset[/code] is the number of seconds cut off at the beginning of the audio stream, while [code]end_offset[/code] is at the ending.
 			</description>
 		</method>
 		<method name="audio_track_set_key_end_offset">
@@ -121,6 +131,7 @@
 			<argument index="2" name="offset" type="float">
 			</argument>
 			<description>
+				Sets the end offset of the key identified by [code]key_idx[/code] to value [code]offset[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
 			</description>
 		</method>
 		<method name="audio_track_set_key_start_offset">
@@ -133,6 +144,7 @@
 			<argument index="2" name="offset" type="float">
 			</argument>
 			<description>
+				Sets the start offset of the key identified by [code]key_idx[/code] to value [code]offset[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
 			</description>
 		</method>
 		<method name="audio_track_set_key_stream">
@@ -145,6 +157,7 @@
 			<argument index="2" name="stream" type="Resource">
 			</argument>
 			<description>
+				Sets the stream of the key identified by [code]key_idx[/code] to value [code]offset[/code]. The [code]track_idx[/code] must be the index of an Audio Track.
 			</description>
 		</method>
 		<method name="bezier_track_get_key_in_handle" qualifiers="const">
@@ -155,6 +168,7 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the in handle of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_get_key_out_handle" qualifiers="const">
@@ -165,6 +179,7 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the out handle of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_get_key_value" qualifiers="const">
@@ -175,6 +190,7 @@
 			<argument index="1" name="key_idx" type="int">
 			</argument>
 			<description>
+				Returns the value of the key identified by [code]key_idx[/code]. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_insert_key">
@@ -191,6 +207,8 @@
 			<argument index="4" name="out_handle" type="Vector2" default="Vector2( 0, 0 )">
 			</argument>
 			<description>
+				Inserts a Bezier Track key at the given [code]time[/code] in seconds. The [code]track_idx[/code] must be the index of a Bezier Track.
+				[code]in_handle[/code] is the left-side weight of the added Bezier curve point, [code]out_handle[/code] is the right-side one, while [code]value[/code] is the actual value at this point.
 			</description>
 		</method>
 		<method name="bezier_track_interpolate" qualifiers="const">
@@ -201,6 +219,7 @@
 			<argument index="1" name="time" type="float">
 			</argument>
 			<description>
+				Returns the interpolated value at the given [code]time[/code] (in seconds). The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_set_key_in_handle">
@@ -213,6 +232,7 @@
 			<argument index="2" name="in_handle" type="Vector2">
 			</argument>
 			<description>
+				Sets the in handle of the key identified by [code]key_idx[/code] to value [code]in_handle[/code]. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_set_key_out_handle">
@@ -225,6 +245,7 @@
 			<argument index="2" name="out_handle" type="Vector2">
 			</argument>
 			<description>
+				Sets the out handle of the key identified by [code]key_idx[/code] to value [code]out_handle[/code]. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="bezier_track_set_key_value">
@@ -237,6 +258,7 @@
 			<argument index="2" name="value" type="float">
 			</argument>
 			<description>
+				Sets the value of the key identified by [code]key_idx[/code] to the given value. The [code]track_idx[/code] must be the index of a Bezier Track.
 			</description>
 		</method>
 		<method name="clear">
@@ -675,6 +697,7 @@
 	<signals>
 		<signal name="tracks_changed">
 			<description>
+				Emitted when there's a change in the list of tracks, e.g. tracks are added, moved or have changed paths.
 			</description>
 		</signal>
 	</signals>
@@ -689,10 +712,13 @@
 			Method tracks call functions with given arguments per key.
 		</constant>
 		<constant name="TYPE_BEZIER" value="3" enum="TrackType">
+			Bezier tracks are used to interpolate a value using custom curves. They can also be used to animate sub-properties of vectors and colors (e.g. alpha value of a [Color]).
 		</constant>
 		<constant name="TYPE_AUDIO" value="4" enum="TrackType">
+			Audio tracks are used to play an audio stream with either type of [AudioStreamPlayer]. The stream can be trimmed and previewed in the animation.
 		</constant>
 		<constant name="TYPE_ANIMATION" value="5" enum="TrackType">
+			Animation tracks play animations in other [AnimationPlayer] nodes.
 		</constant>
 		<constant name="INTERPOLATION_NEAREST" value="0" enum="InterpolationType">
 			No interpolation (nearest value).
@@ -713,6 +739,7 @@
 			Update at the keyframes.
 		</constant>
 		<constant name="UPDATE_CAPTURE" value="3" enum="UpdateMode">
+			Same as linear interpolation, but also interpolates from the current value (i.e. dynamically at runtime) if the first key isn't at 0 seconds.
 		</constant>
 	</constants>
 </class>

doc/classes/AnimationNodeBlendTree.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeBlendTree" inherits="AnimationRootNode" version="4.0">
 	<brief_description>
+		[AnimationTree] node resource that contains many blend type nodes.
 	</brief_description>
 	<description>
+		This node may contain a sub-tree of any other blend type nodes, such as mix, blend2, blend3, one shot, etc. This is one of the most commonly used roots.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html</link>
@@ -18,6 +20,7 @@
 			<argument index="2" name="position" type="Vector2" default="Vector2( 0, 0 )">
 			</argument>
 			<description>
+				Adds an [AnimationNode] at the given [code]position[/code]. The [code]name[/code] is used to identify the created sub-node later.
 			</description>
 		</method>
 		<method name="connect_node">
@@ -30,6 +33,7 @@
 			<argument index="2" name="output_node" type="StringName">
 			</argument>
 			<description>
+				Connects the output of an [AnimationNode] as input for another [AnimationNode], at the input port specified by [code]input_index[/code].
 			</description>
 		</method>
 		<method name="disconnect_node">
@@ -40,6 +44,7 @@
 			<argument index="1" name="input_index" type="int">
 			</argument>
 			<description>
+				Disconnects the node connected to the specified input.
 			</description>
 		</method>
 		<method name="get_node" qualifiers="const">
@@ -48,6 +53,7 @@
 			<argument index="0" name="name" type="StringName">
 			</argument>
 			<description>
+				Returns the sub-node with the specified [code]name[/code].
 			</description>
 		</method>
 		<method name="get_node_position" qualifiers="const">
@@ -56,6 +62,7 @@
 			<argument index="0" name="name" type="StringName">
 			</argument>
 			<description>
+				Returns the position of the sub-node with the specified [code]name[/code].
 			</description>
 		</method>
 		<method name="has_node" qualifiers="const">
@@ -64,6 +71,7 @@
 			<argument index="0" name="name" type="StringName">
 			</argument>
 			<description>
+				Returns [code]true[/code] if a sub-node with specified [code]name[/code] exists.
 			</description>
 		</method>
 		<method name="remove_node">
@@ -72,6 +80,7 @@
 			<argument index="0" name="name" type="StringName">
 			</argument>
 			<description>
+				Removes a sub-node.
 			</description>
 		</method>
 		<method name="rename_node">
@@ -82,6 +91,7 @@
 			<argument index="1" name="new_name" type="StringName">
 			</argument>
 			<description>
+				Changes the name of a sub-node.
 			</description>
 		</method>
 		<method name="set_node_position">
@@ -92,25 +102,33 @@
 			<argument index="1" name="position" type="Vector2">
 			</argument>
 			<description>
+				Modifies the position of a sub-node.
 			</description>
 		</method>
 	</methods>
 	<members>
 		<member name="graph_offset" type="Vector2" setter="set_graph_offset" getter="get_graph_offset" default="Vector2( 0, 0 )">
+			The global offset of all sub-nodes.
 		</member>
 	</members>
 	<constants>
 		<constant name="CONNECTION_OK" value="0">
+			The connection was successful.
 		</constant>
 		<constant name="CONNECTION_ERROR_NO_INPUT" value="1">
+			The input node is [code]null[/code].
 		</constant>
 		<constant name="CONNECTION_ERROR_NO_INPUT_INDEX" value="2">
+			The specified input port is out of range.
 		</constant>
 		<constant name="CONNECTION_ERROR_NO_OUTPUT" value="3">
+			The output node is [code]null[/code].
 		</constant>
 		<constant name="CONNECTION_ERROR_SAME_NODE" value="4">
+			Input and output nodes are the same.
 		</constant>
 		<constant name="CONNECTION_ERROR_CONNECTION_EXISTS" value="5">
+			The specified connection already exists.
 		</constant>
 	</constants>
 </class>

doc/classes/AnimationNodeOneShot.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeOneShot" inherits="AnimationNode" version="4.0">
 	<brief_description>
+		Plays an animation once in [AnimationNodeBlendTree].
 	</brief_description>
 	<description>
+		A resource to add to an [AnimationNodeBlendTree]. This node will execute a sub-animation and return once it finishes. Blend times for fading in and out can be customized, as well as filters.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html</link>
@@ -25,10 +27,13 @@
 	</methods>
 	<members>
 		<member name="autorestart" type="bool" setter="set_autorestart" getter="has_autorestart" default="false">
+			If [code]true[/code], the sub-animation will restart automatically after finishing.
 		</member>
 		<member name="autorestart_delay" type="float" setter="set_autorestart_delay" getter="get_autorestart_delay" default="1.0">
+			The delay after which the automatic restart is triggered, in seconds.
 		</member>
 		<member name="autorestart_random_delay" type="float" setter="set_autorestart_random_delay" getter="get_autorestart_random_delay" default="0.0">
+			If [member autorestart] is [code]true[/code], a random additional delay (in seconds) between 0 and this value will be added to [member autorestart_delay].
 		</member>
 		<member name="fadein_time" type="float" setter="set_fadein_time" getter="get_fadein_time" default="0.1">
 		</member>

doc/classes/AnimationNodeOutput.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeOutput" inherits="AnimationNode" version="4.0">
 	<brief_description>
+		Generic output node to be added to [AnimationNodeBlendTree].
 	</brief_description>
 	<description>
 	</description>

doc/classes/AnimationNodeTimeScale.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeTimeScale" inherits="AnimationNode" version="4.0">
 	<brief_description>
+		A time-scaling animation node to be used with [AnimationTree].
 	</brief_description>
 	<description>
+		Allows scaling the speed of the animation (or reversing it) in any children nodes. Setting it to 0 will pause the animation.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html</link>

doc/classes/AnimationNodeTimeSeek.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeTimeSeek" inherits="AnimationNode" version="4.0">
 	<brief_description>
+		A time-seeking animation node to be used with [AnimationTree].
 	</brief_description>
 	<description>
+		This node can be used to cause a seek command to happen to any sub-children of the graph. After setting the time, this value returns to -1.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html</link>

doc/classes/AnimationNodeTransition.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationNodeTransition" inherits="AnimationNode" version="4.0">
 	<brief_description>
+		A generic animation transition node for [AnimationTree].
 	</brief_description>
 	<description>
+		Simple state machine for cases which don't require a more advanced [AnimationNodeStateMachine]. Animations can be connected to the inputs and transition times can be specified.
 	</description>
 	<tutorials>
 		<link>https://docs.godotengine.org/en/latest/tutorials/animation/animation_tree.html</link>
@@ -47,8 +49,10 @@
 	</methods>
 	<members>
 		<member name="input_count" type="int" setter="set_enabled_inputs" getter="get_enabled_inputs" default="0">
+			The number of available input ports for this node.
 		</member>
 		<member name="xfade_time" type="float" setter="set_cross_fade_time" getter="get_cross_fade_time" default="0.0">
+			Cross-fading time (in seconds) between each animation connected to the inputs.
 		</member>
 	</members>
 	<constants>