From 5241464a462d4f7ab00ccf8cb4b59f4547fe6639 Mon Sep 17 00:00:00 2001
From: Yaohua Xiong <xiongyaohua@gmail.com>
Date: Sun, 7 Aug 2022 18:29:12 +0800
Subject: Refactor Curv3D and  PathFollow3D

This commit makes the following major changes

1. Add "sample_baked_with_rotation()" to Curve3D, making it usable independently. A similar change was made to Curve2D previously.
2. Refactor the _bake() method on Curve3D, using Parallel Transport Frame instead of Frenet Frame.
3. Refactor the sample_* methods, including:
  i. Factor out common binary search code, following the DRY principe
  ii. sample_up_vector() interpolated up vector as part of rotation frame(posture) for consistancy and accuracy.
---
 doc/classes/Curve3D.xml      |  9 +++++++++
 doc/classes/PathFollow3D.xml | 13 +++++++++++++
 2 files changed, 22 insertions(+)

(limited to 'doc/classes')

diff --git a/doc/classes/Curve3D.xml b/doc/classes/Curve3D.xml
index 3e4e05f51a..63134417b1 100644
--- a/doc/classes/Curve3D.xml
+++ b/doc/classes/Curve3D.xml
@@ -132,6 +132,15 @@
 				If the curve has no up vectors, the function sends an error to the console, and returns [code](0, 1, 0)[/code].
 			</description>
 		</method>
+		<method name="sample_baked_with_rotation" qualifiers="const">
+			<return type="Transform3D" />
+			<param index="0" name="offset" type="float" />
+			<param index="1" name="cubic" type="bool" default="false" />
+			<param index="2" name="apply_tilt" type="bool" default="false" />
+			<description>
+				Similar with [code]interpolate_baked()[/code]. The the return value is [code]Transform3D[/code], with [code]origin[/code] as point position, [code]basis.x[/code] as sideway vector, [code]basis.y[/code] as up vector, [code]basis.z[/code] as forward vector. When the curve length is 0, there is no reasonable way to caculate the rotation, all vectors aligned with global space axes.
+			</description>
+		</method>
 		<method name="samplef" qualifiers="const">
 			<return type="Vector3" />
 			<param index="0" name="fofs" type="float" />
diff --git a/doc/classes/PathFollow3D.xml b/doc/classes/PathFollow3D.xml
index ba7207be8f..fa7580b7b6 100644
--- a/doc/classes/PathFollow3D.xml
+++ b/doc/classes/PathFollow3D.xml
@@ -9,6 +9,16 @@
 	</description>
 	<tutorials>
 	</tutorials>
+	<methods>
+		<method name="correct_posture" qualifiers="static">
+			<return type="Transform3D" />
+			<param index="0" name="transform" type="Transform3D" />
+			<param index="1" name="rotation_mode" type="int" enum="PathFollow3D.RotationMode" />
+			<description>
+				Correct the [code]transform[/code]. [code]rotation_mode[/code] implicitly specifies how posture (forward, up and sideway direction) is caculated.
+			</description>
+		</method>
+	</methods>
 	<members>
 		<member name="cubic_interp" type="bool" setter="set_cubic_interpolation" getter="get_cubic_interpolation" default="true">
 			If [code]true[/code], the position between two cached points is interpolated cubically, and linearly otherwise.
@@ -30,6 +40,9 @@
 		<member name="rotation_mode" type="int" setter="set_rotation_mode" getter="get_rotation_mode" enum="PathFollow3D.RotationMode" default="3">
 			Allows or forbids rotation on one or more axes, depending on the [enum RotationMode] constants being used.
 		</member>
+		<member name="tilt_enabled" type="bool" setter="set_tilt_enabled" getter="is_tilt_enabled" default="true">
+			If [code]true[/code], the tilt property of [Curve3D] takes effect.
+		</member>
 		<member name="v_offset" type="float" setter="set_v_offset" getter="get_v_offset" default="0.0">
 			The node's offset perpendicular to the curve.
 		</member>
-- 
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