Add explicit_elapse option to NodeSeek to handle some processes

doc/classes/AnimationNodeTimeSeek.xml

@@ -30,4 +30,9 @@
 	<tutorials>
 		<link title="Using AnimationTree">$DOCS_URL/tutorials/animation/animation_tree.html</link>
 	</tutorials>
+	<members>
+		<member name="explicit_elapse" type="bool" setter="set_explicit_elapse" getter="is_explicit_elapse" default="true">
+			If [code]true[/code], some processes are executed to handle keys between seeks, such as calculating root motion and finding the nearest discrete key.
+		</member>
+	</members>
 </class>

scene/animation/animation_blend_tree.cpp

@@ -1003,6 +1003,14 @@ String AnimationNodeTimeSeek::get_caption() const {
 	return "TimeSeek";
 }
 
+void AnimationNodeTimeSeek::set_explicit_elapse(bool p_enable) {
+	explicit_elapse = p_enable;
+}
+
+bool AnimationNodeTimeSeek::is_explicit_elapse() const {
+	return explicit_elapse;
+}
+
 AnimationNode::NodeTimeInfo AnimationNodeTimeSeek::_process(const AnimationMixer::PlaybackInfo p_playback_info, bool p_test_only) {
 	double cur_seek_pos = get_parameter(seek_pos_request);
 
@@ -1011,7 +1019,7 @@ AnimationNode::NodeTimeInfo AnimationNodeTimeSeek::_process(const AnimationMixer
 	if (Animation::is_greater_or_equal_approx(cur_seek_pos, 0)) {
 		pi.time = cur_seek_pos;
 		pi.seeked = true;
-		pi.is_external_seeking = true;
+		pi.is_external_seeking = explicit_elapse;
 		set_parameter(seek_pos_request, -1.0); // Reset.
 	}
 
@@ -1022,6 +1030,12 @@ AnimationNodeTimeSeek::AnimationNodeTimeSeek() {
 	add_input("in");
 }
 
+void AnimationNodeTimeSeek::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_explicit_elapse", "enable"), &AnimationNodeTimeSeek::set_explicit_elapse);
+	ClassDB::bind_method(D_METHOD("is_explicit_elapse"), &AnimationNodeTimeSeek::is_explicit_elapse);
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "explicit_elapse"), "set_explicit_elapse", "is_explicit_elapse");
+}
+
 /////////////////////////////////////////////////
 
 bool AnimationNodeTransition::_set(const StringName &p_path, const Variant &p_value) {

scene/animation/animation_blend_tree.h

@@ -302,6 +302,10 @@ class AnimationNodeTimeSeek : public AnimationNode {
 	GDCLASS(AnimationNodeTimeSeek, AnimationNode);
 
 	StringName seek_pos_request = PNAME("seek_request");
+	bool explicit_elapse = true;
+
+protected:
+	static void _bind_methods();
 
 public:
 	virtual void get_parameter_list(List<PropertyInfo> *r_list) const override;
@@ -311,6 +315,9 @@ public:
 
 	virtual NodeTimeInfo _process(const AnimationMixer::PlaybackInfo p_playback_info, bool p_test_only = false) override;
 
+	void set_explicit_elapse(bool p_enable);
+	bool is_explicit_elapse() const;
+
 	AnimationNodeTimeSeek();
 };