Added some explanations that should make it easier to use the AnimationTreePlayer

doc/classes/AnimationTreePlayer.xml

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="AnimationTreePlayer" inherits="Node" category="Core" version="3.0-beta">
 	<brief_description>
-		Animation Player that uses a node graph for the blending.
+		Animation Player that uses a node graph for blending Animations.
 	</brief_description>
 	<description>
 		A node graph tool for blending multiple animations bound to an [AnimationPlayer]. Especially useful for animating characters or other skeleton-based rigs. It can combine several animations to form a desired pose.
+		It takes [Animation]s from an [AnimationPlayer] node and mixes them depending on the graph.
 	</description>
 	<tutorials>
 	</tutorials>
@@ -37,7 +38,7 @@
 			<argument index="0" name="id" type="String">
 			</argument>
 			<description>
-				Returns the [AnimationPlayer]'s animation bound to the [code]AnimationTreePlayer[/code]'s animation node with name [code]id[/code].
+				Returns the [AnimationPlayer]'s [Animation] bound to the [code]AnimationTreePlayer[/code]'s animation node with name [code]id[/code].
 			</description>
 		</method>
 		<method name="animation_node_get_master_animation" qualifiers="const">
@@ -46,7 +47,7 @@
 			<argument index="0" name="id" type="String">
 			</argument>
 			<description>
-				Returns the name of the [member master_player]'s animation bound to this animation node.
+				Returns the name of the [member master_player]'s [Animation] bound to this animation node.
 			</description>
 		</method>
 		<method name="animation_node_set_animation">
@@ -57,7 +58,7 @@
 			<argument index="1" name="animation" type="Animation">
 			</argument>
 			<description>
-				Binds a new animation from the [member master_player] to the [code]AnimationTreePlayer[/code]'s animation node with name [code]id[/code].
+				Binds a new [Animation] from the [member master_player] to the [code]AnimationTreePlayer[/code]'s animation node with name [code]id[/code].
 			</description>
 		</method>
 		<method name="animation_node_set_filter_path">
@@ -81,7 +82,7 @@
 			<argument index="1" name="source" type="String">
 			</argument>
 			<description>
-				Binds the animation named [code]source[/code] from [member master_player] to the animation node [code]id[/code]. Recalculates caches.
+				Binds the [Animation] named [code]source[/code] from [member master_player] to the animation node [code]id[/code]. Recalculates caches.
 			</description>
 		</method>
 		<method name="are_nodes_connected" qualifiers="const">
@@ -115,6 +116,10 @@
 			</argument>
 			<description>
 				Sets the blend amount of a Blend2 node given its name and value.
+				A Blend2 Node blends two animations with the amount between 0 and 1.
+				At 0, Output is input a.
+				Towards 1, the influence of a gets lessened, the influence of b gets raised.
+				At 1, Output is input b.
 			</description>
 		</method>
 		<method name="blend2_node_set_filter_path">
@@ -148,6 +153,12 @@
 			</argument>
 			<description>
 				Sets the blend amount of a Blend3 node given its name and value.
+				A Blend3 Node blends three animations with the amount between -1 and 1.
+				At -1, Output is input b-.
+				From -1 to 0, the influence of b- gets lessened, the influence of a gets raised and the influence of b+ is 0.
+				At 0, Output is input a.
+				From 0 to 1, the influence of a gets lessened, the influence of b+ gets raised and the influence of b+ is 0.
+				At 1, Output is input b+.
 			</description>
 		</method>
 		<method name="blend4_node_get_amount" qualifiers="const">
@@ -168,6 +179,8 @@
 			</argument>
 			<description>
 				Sets the blend amount of a Blend4 node given its name and value.
+				A Blend4 Node blends two pairs of animations.
+				The two pairs are blended like blend2 and then added together.
 			</description>
 		</method>
 		<method name="connect_nodes">
@@ -198,7 +211,7 @@
 			<return type="PoolStringArray">
 			</return>
 			<description>
-				Returns a PoolStringArray containing the name of all nodes.
+				Returns a [PoolStringArray] containing the name of all nodes.
 			</description>
 		</method>
 		<method name="mix_node_get_amount" qualifiers="const">
@@ -219,6 +232,7 @@
 			</argument>
 			<description>
 				Sets mix amount of a Mix node given its name and value.
+				A Mix node adds input b to input a by a the amount given by ratio.
 			</description>
 		</method>
 		<method name="node_exists" qualifiers="const">
@@ -450,7 +464,7 @@
 			<return type="void">
 			</return>
 			<description>
-				Resets this AnimationTreePlayer.
+				Resets this [code]AnimationTreePlayer[/code].
 			</description>
 		</method>
 		<method name="timescale_node_get_scale" qualifiers="const">
@@ -471,6 +485,8 @@
 			</argument>
 			<description>
 				Sets the time scale of the TimeScale node with name [code]id[/code] to [code]scale[/code].
+				The timescale node is used to speed [Animation]s up if the scale is above 1 or slow them down if it is below 1.
+				If applied after a blend or mix, affects all input animations to that blend or mix.
 			</description>
 		</method>
 		<method name="timeseek_node_seek">
@@ -482,6 +498,7 @@
 			</argument>
 			<description>
 				Sets the time seek value of the TimeSeek node with name [code]id[/code] to [code]seconds[/code]
+				This functions as a seek in the [Animation] or the blend or mix of [Animation]s input in it.
 			</description>
 		</method>
 		<method name="transition_node_delete_input">
@@ -510,7 +527,7 @@
 			<argument index="0" name="id" type="String">
 			</argument>
 			<description>
-				Returns the number of inputs for the transition node with name [code]id[/code].
+				Returns the number of inputs for the transition node with name [code]id[/code]. You can add inputs by rightclicking on the transition node.
 			</description>
 		</method>
 		<method name="transition_node_get_xfade_time" qualifiers="const">
@@ -586,9 +603,11 @@
 		</member>
 		<member name="base_path" type="NodePath" setter="set_base_path" getter="get_base_path">
 			The node from which to relatively access other nodes. Default value: [code]".."[/code].
+			It accesses the Bones, so it should point to the same Node the AnimationPlayer would point its Root Node at.
 		</member>
 		<member name="master_player" type="NodePath" setter="set_master_player" getter="get_master_player">
 			The path to the [AnimationPlayer] from which this [code]AnimationTreePlayer[/code] binds animations to animation nodes.
+			Once set, Animation nodes can be added to the AnimationTreePlayer.
 		</member>
 		<member name="playback_process_mode" type="int" setter="set_animation_process_mode" getter="get_animation_process_mode" enum="AnimationTreePlayer.AnimationProcessMode">
 			The thread in which to update animations. Default value: [enum ANIMATION_PROCESS_IDLE].