From a68d04a87c78ed9120e05e66ed1952e1ba5d6248 Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Thu, 18 Feb 2021 18:37:37 +0100
Subject: i&m: update rotation with  increasing/decreasing theta

---
 Year_2/IandM/rotation/rotation.pde | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

(limited to 'Year_2')

diff --git a/Year_2/IandM/rotation/rotation.pde b/Year_2/IandM/rotation/rotation.pde
index 33f79ad..b427779 100644
--- a/Year_2/IandM/rotation/rotation.pde
+++ b/Year_2/IandM/rotation/rotation.pde
@@ -1,13 +1,25 @@
 void setup() {
   size(768, 256);
+}
+
+float th = 0;
+
+void draw() {
   PImage img = loadImage("lena.png");
   img.resize(256, 256);
-  img.filter(GRAY);
 
   image(img, 0, 0);
-  image(rotate_forward(img, radians(45)), 256, 0);
-  
-  image(inverse_rotate(img, radians(45)), 512, 0);
+  image(rotate_forward(img, radians(th)), 256, 0);
+
+  image(inverse_rotate(img, radians(th)), 512, 0);
+}
+
+void keyPressed() {
+  if (key == '+') {
+    th++;
+  } else if (key == '-') {
+    th--;
+  }
 }
 
 PImage rotate_forward(PImage I, float theta) {
-- 
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