From 85bcc06ea09df9c8e9ad376e133573de311fbb87 Mon Sep 17 00:00:00 2001
From: mattmcw <matt@sixteenmillimeter.com>
Date: Wed, 5 Apr 2023 20:07:57 -0400
Subject: [PATCH] The random_seed parameter does not produce the desired
 effects. Creates different files even though they share the same random_seed.

---
 deterministic_tests.sh               | 24 ++++++++++++++++++++++++
 scad/deterministic_random_seed.scad  |  9 +++++++++
 scad/deterministic_random_seed2.scad |  9 +++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 scad/deterministic_random_seed.scad
 create mode 100644 scad/deterministic_random_seed2.scad

diff --git a/deterministic_tests.sh b/deterministic_tests.sh
index f393344..6ba75ef 100644
--- a/deterministic_tests.sh
+++ b/deterministic_tests.sh
@@ -75,5 +75,29 @@ fi
 
 rm -rf "${C14N}"
 
+##############
+#  RANDOM_SEED
+##############
+
+echo "random_seed..."
+
+RANDOM_SEED=$(mktemp -d)
+FIRST="${RANDOM_SEED}/first.stl"
+SECOND="${RANDOM_SEED}/second.stl"
+
+openscad -q -o "${FIRST}" scad/deterministic_random_seed.scad
+openscad -q -o "${SECOND}" scad/deterministic_random_seed2.scad
+
+DIFF_VAL=$(diff "${FIRST}" "${SECOND}")
+
+if [[ "${DIFF_VAL}" == "" ]]; then
+	echo "Files are the same"
+else
+	#echo "${DIFF_VAL}"
+	echo "Files are different"
+fi
+
+rm -rf "${RANDOM_SEED}"
+
 #--export-format asciistl
 #--export-format binstl
diff --git a/scad/deterministic_random_seed.scad b/scad/deterministic_random_seed.scad
new file mode 100644
index 0000000..64e2615
--- /dev/null
+++ b/scad/deterministic_random_seed.scad
@@ -0,0 +1,9 @@
+$fn = 100;
+random_seed=1337;
+
+difference () {
+	cube([40, 40, 40], center = true);
+	cylinder(r = 20/2, h = 40 + 1, center = true);
+	rotate([90, 0, 0]) cylinder(r = 20/2, h = 40 + 1, center = true);
+	rotate([0, 90, 0]) cylinder(r = 20/2, h = 40 + 1, center = true);
+}
\ No newline at end of file
diff --git a/scad/deterministic_random_seed2.scad b/scad/deterministic_random_seed2.scad
new file mode 100644
index 0000000..54934ae
--- /dev/null
+++ b/scad/deterministic_random_seed2.scad
@@ -0,0 +1,9 @@
+$fn = 100;
+random_seed=1337;
+
+difference () {
+	cube([40, 40, 40], center = true);
+	rotate([0, 90, 0]) cylinder(r = 20/2, h = 40 + 1, center = true);
+	rotate([90, 0, 0]) cylinder(r = 20/2, h = 40 + 1, center = true);
+	cylinder(r = 20/2, h = 40 + 1, center = true);
+}
\ No newline at end of file