From 19d931f97d87097bc4b585f77e155499db665ad9 Mon Sep 17 00:00:00 2001
From: Jet Hughes <jethughes0@gmail.com>
Date: Tue, 28 Mar 2023 13:04:41 +1300
Subject: [PATCH] vault backup: 2023-03-28 13:04:41

---
 content/notes/09-3d-geometry.md | 20 ++++++++++++++++++++
 content/notes/cosc-342.md       |  1 +
 content/notes/info-305.md       |  3 ++-
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 content/notes/09-3d-geometry.md

diff --git a/content/notes/09-3d-geometry.md b/content/notes/09-3d-geometry.md
new file mode 100644
index 000000000..2591b9a0b
--- /dev/null
+++ b/content/notes/09-3d-geometry.md
@@ -0,0 +1,20 @@
+---
+title: "09-3d-geometry"
+tags: 
+- lecture
+- cosc342
+---
+
+
+THREE DIMENSIONS 
+- We move from 2D to 3D 
+- Many ideas the same: 
+	- Homogeneous co-ordinates 
+	- Scaling and translation 
+- Some things get tricky 
+	- Choice of left- or right- handed coordinates 
+	- Rotations get complicated 
+- Projection from 3D to 2D
+
+LEFT & RIGHT-HANDED CO-ORDINATES
+![](https://i.imgur.com/0rkaqh5.png)
diff --git a/content/notes/cosc-342.md b/content/notes/cosc-342.md
index 042288f80..a97595974 100644
--- a/content/notes/cosc-342.md
+++ b/content/notes/cosc-342.md
@@ -24,6 +24,7 @@ tags:
 - [x] [[05-feature-description-and-matching]]
 - [x] [[06-homographies]]
 - [[08-visual-tracking-and-matching]]
+- [[09-3d-geometry]]
 
 # Info
 
diff --git a/content/notes/info-305.md b/content/notes/info-305.md
index 92533fd1c..b1a2c8046 100644
--- a/content/notes/info-305.md
+++ b/content/notes/info-305.md
@@ -23,5 +23,6 @@ tags:
 - [x] [[06-challenges-for-ubicomp-and-intro-to-sensors]]
 - [x] [[07-location-sensors]]
 - [x] [[08-proximity sensors]]
-- [ ] [[09-location-sensors-3]]
+- [x] [[09-location-sensors-3]]
+- [ ] 
 # Info
\ No newline at end of file