ex/2/44.rkt: do ex. 2.44

2 files changed, 39 insertions, 0 deletions

diff --git a/ex/2/44.rkt b/ex/2/44.rkt
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+++ b/ex/2/44.rkt
@@ -0,0 +1,39 @@
+;;;; License: CC0-1.0
+
+#lang racket
+
+(require
+ racket/runtime-path
+ sicp-pict)
+
+(define-runtime-path rogers-file "rogers.jpg")
+
+(define rogers
+  (bitmap->painter rogers-file))
+
+(define (right-split painter n)
+  (if (= n 0)
+      painter
+      (let ((smaller (right-split painter (- n 1))))
+        (beside painter (below smaller smaller)))))
+
+(define (up-split painter n)
+  (if (= n  0)
+      painter
+      (let ((smaller (up-split painter (- n 1))))
+        (below painter (beside smaller smaller)))))
+
+(define (corner-split painter n)
+  (if (= n 0)
+      painter
+      (let ((up (up-split painter (- n 1)))
+            (right (right-split painter (- n 1))))
+        (let ((top-left (beside up up))
+              (bottom-right (below right right))
+              (corner (corner-split painter (- n 1))))
+          (beside (below painter top-left)
+                  (below bottom-right corner))))))
+
+;;; Racket REPL
+;;;
+;;; https://ricketyspace.net/sicp/2.44.jpg
diff --git a/ex/2/rogers.jpg b/ex/2/rogers.jpg
new file mode 100644
index 0000000..5821c24
--- /dev/null
+++ b/ex/2/rogers.jpg