Improve BTParallel class doc

doc_classes/BTParallel.xml

@@ -1,23 +1,23 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="BTParallel" inherits="BTComposite" version="4.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
 	<brief_description>
-		BT composite that executes child tasks until one of the criteria is met.
+		BT composite that executes all of its child tasks simultaneously.
 	</brief_description>
 	<description>
-		BTParallel executes its child tasks until one of the criterea is met. It will execute each task at least once, from the first to the last, before returning a result.
+		BTParallel executes all of its child tasks simultaneously. Note that BTParallel doesn't involve multithreading. It processes each task sequentially, from first to last, in the same tick before returning a result. If one of the abort criterea is met, any tasks currently [code]RUNNING[/code] will be terminated, and the result will be either [code]FAILURE[/code] or [code]SUCCESS[/code]. The [member num_failures_required] determines when BTParallel fails and [member num_successes_required] when it succeeds. When both are fullfilled, it gives priority to [member num_failures_required].
-		If set to [member repeat], the child tasks will be re-executed, regardless of whether they previously resulted in a [code]SUCCESS[/code] or [code]FAILURE[/code].
+		If set to [member repeat], all child tasks will be re-executed each tick, regardless of whether they previously resulted in [code]SUCCESS[/code] or [code]FAILURE[/code].
-		Returns [code]FAILURE[/code] when the required number of tasks return [code]FAILURE[/code]. When [member repeat] is set to [code]false[/code], if none of the criteria were met, and all child tasks resulted in a [code]SUCCESS[/code] or [code]FAILURE[/code], BTParallel will return [code]FAILURE[/code].
+		Returns [code]FAILURE[/code] when the required number of child tasks result in [code]FAILURE[/code]. When [member repeat] is set to [code]false[/code], if none of the criteria were met and all child tasks resulted in either [code]SUCCESS[/code] or [code]FAILURE[/code], BTParallel will return [code]FAILURE[/code].
-		Returns [code]SUCCESS[/code] when the required number of tasks return [code]SUCCESS[/code].
+		Returns [code]SUCCESS[/code] when the required number of child tasks result in [code]SUCCESS[/code].
 		Returns [code]RUNNING[/code] if none of the criterea were fulfilled, and either [member repeat] is set to [code]true[/code] or a child task resulted in [code]RUNNING[/code].
 	</description>
 	<tutorials>
 	</tutorials>
 	<members>
 		<member name="num_failures_required" type="int" setter="set_num_failures_required" getter="get_num_failures_required" default="1">
-			When the specified number of child tasks return [code]SUCCESS[/code], BTParallel will also return [code]SUCCESS[/code].
+			If the specified number of child tasks return [code]SUCCESS[/code], BTParallel will also return [code]SUCCESS[/code].
 		</member>
 		<member name="num_successes_required" type="int" setter="set_num_successes_required" getter="get_num_successes_required" default="1">
-			When the specified number of child tasks return [code]FAILURE[/code], BTParallel will also return [code]FAILURE[/code].
+			If the specified number of child tasks return [code]FAILURE[/code], BTParallel will also return [code]FAILURE[/code].
 		</member>
 		<member name="repeat" type="bool" setter="set_repeat" getter="get_repeat" default="false">
 			When [code]true[/code], the child tasks will be executed again, regardless of whether they previously resulted in a [code]SUCCESS[/code] or [code]FAILURE[/code].