initial commit, 4.5 stable

doc/classes/AnimationNodeSub2.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="AnimationNodeSub2" inherits="AnimationNodeSync" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
+	<brief_description>
+		Blends two animations subtractively inside of an [AnimationNodeBlendTree].
+	</brief_description>
+	<description>
+		A resource to add to an [AnimationNodeBlendTree]. Blends two animations subtractively based on the amount value.
+		This animation node is usually used for pre-calculation to cancel out any extra poses from the animation for the "add" animation source in [AnimationNodeAdd2] or [AnimationNodeAdd3].
+		In general, the blend value should be in the [code][0.0, 1.0][/code] range, but values outside of this range can be used for amplified or inverted animations.
+		[b]Note:[/b] This calculation is different from using a negative value in [AnimationNodeAdd2], since the transformation matrices do not satisfy the commutative law. [AnimationNodeSub2] multiplies the transformation matrix of the inverted animation from the left side, while negative [AnimationNodeAdd2] multiplies it from the right side.
+	</description>
+	<tutorials>
+		<link title="AnimationTree">$DOCS_URL/tutorials/animation/animation_tree.html</link>
+	</tutorials>
+</class>