From 69574783196ba1af7f7c428ae8132d7379277c20 Mon Sep 17 00:00:00 2001
From: Wojtek <stalking@disallow.ed>
Date: Sun, 31 Oct 2021 23:55:32 +0100
Subject: initial commit

---
 make_petals.sh | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100755 make_petals.sh

(limited to 'make_petals.sh')

diff --git a/make_petals.sh b/make_petals.sh
new file mode 100755
index 0000000..b4e7414
--- /dev/null
+++ b/make_petals.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+IN_ROW=15
+
+DELAY_BETWEEN=0.2
+DEG_BETWEEN=24
+
+SUBUNITS="4.9 3.5 2.5 1.5 1"
+SUBUNITS_N=$(wc -w <<EOF
+$SUBUNITS
+EOF
+	     )
+END_DEG=360
+ANIMATION_DURATION=10 # must match that in chryzantem.html.template
+ANIMATION_DELAY=$(bc <<EOF
+2 + $SUBUNITS_N * $IN_ROW * $DELAY_BETWEEN
+EOF
+		  )
+
+print_petal() {
+    cat <<EOF
+      <div class="petal">
+	<div style="--subunit: $SUBUNIT; --end-deg: -${END_DEG}deg; animation-delay: ${ANIMATION_DELAY}s;">
+	  <img src="./petal.svg" alt="flower petal" draggable="false">
+	</div>
+      </div>
+EOF
+}
+
+I=0
+for SUBUNIT in $SUBUNITS; do
+    I=$((I +  1))
+
+    if [ $I -eq $SUBUNITS_N ]; then
+	bc >_inner_row_delay <<EOF
+$ANIMATION_DELAY + 10
+EOF
+    fi
+
+    if [ $I -eq 1 ]; then
+	bc >_flower_delay <<EOF
+$ANIMATION_DELAY + 10 - $DELAY_BETWEEN
+EOF
+    fi
+
+    for _ in $(seq $IN_ROW); do
+	print_petal
+	END_DEG=$((END_DEG + DEG_BETWEEN))
+	ANIMATION_DELAY=$(bc <<EOF
+$ANIMATION_DELAY - $DELAY_BETWEEN
+EOF
+		   )
+    done
+
+    END_DEG=$((END_DEG + DEG_BETWEEN / 2))
+done
-- 
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