added new lesson

_subsections/sec05/lesson-04.org

@@ -0,0 +1,34 @@
+#+title: Section 05 - Lesson 04 | Physics Nodes Review
+#+HTML_HEAD: <link rel="stylesheet" type="text/css"  href="../../_share/media/css/godot.css" />
+#+OPTIONS: H:6
+
+* Links
+- [[../../toc.org][TOC - Godot Notes]]
+- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/49010953?start=0#overview][S05:L04 - video]]
+
+* Notes
+** Physics2D Nodes
+- StaticBody2D :: useful for floor and walls
+- CharacterBody2D :: characters
+  - set velocity
+  - physics collisions
+  - scripting
+- AnimatableBody2D :: moving platforms and doors
+- RigidBody2D :: objects that have gravity and can be pushed by other objects
+  - set force or impulse to it
+  - e.g. thrust for rocket, tennis ball hit by racket
+
+** how it works
+- we do not control position, the engine does
+- we supply velocity or force
+- engine calucates where we go and speed / position
+
+** Area2D vs Physics2D
+*** similarities
+- has one or more CollisionShape2D
+- Sprite2D
+
+*** differences
+- much easier on calculations
+- checks if one shape overlapping another
+- Area2D is much more inaccurate in collisions

toc.org

@@ -38,5 +38,5 @@
 
 ** Section 5 - Tappy Plane!
 #+attr_html: :class contents-overview
+- [[./_subsections/sec05/lesson-04.org][Lesson 04 | Physics Nodes Review]]
 - [[./_subsections/sec05/lesson-06.org][Lesson 06 | Plane Movement]]
-