From d0deb188dcd41c18bb80adfc5b0d51583e0400eb Mon Sep 17 00:00:00 2001
From: Jens True <jens.chr.true@gmail.com>
Date: Thu, 16 Jun 2022 14:05:18 +0000
Subject: [PATCH] Soft shackle calculator

---
 content/post/endless-loop/index.md            |  9 ++-
 layouts/shortcodes/splice/calc_loop.html      |  4 +-
 .../shortcodes/splice/calc_softshackle.html   | 75 +++++++++++++++++++
 3 files changed, 85 insertions(+), 3 deletions(-)
 create mode 100644 layouts/shortcodes/splice/calc_softshackle.html

diff --git a/content/post/endless-loop/index.md b/content/post/endless-loop/index.md
index 0b3b01f..d79c988 100644
--- a/content/post/endless-loop/index.md
+++ b/content/post/endless-loop/index.md
@@ -25,4 +25,11 @@ All measurements are in Centimeters.
 {{< splice/calc_loop >}} 
 
 # Instruction video
-{{< youtube uzK0gApBrCg >}}
\ No newline at end of file
+{{< youtube uzK0gApBrCg >}}
+
+
+# Soft Shackle Calculator
+
+All measurements are in Centimeters.
+
+{{< splice/calc_softshackle >}} 
\ No newline at end of file
diff --git a/layouts/shortcodes/splice/calc_loop.html b/layouts/shortcodes/splice/calc_loop.html
index 76f9f83..007b58e 100644
--- a/layouts/shortcodes/splice/calc_loop.html
+++ b/layouts/shortcodes/splice/calc_loop.html
@@ -1,5 +1,5 @@
 <script>
-function Calculate(obj)
+function Calculate_Loop(obj)
 {
     //All calculations in CM
     loop_dia 	  = obj.loop_dia.value;
@@ -40,7 +40,7 @@ function Calculate(obj)
         <label for="loop_dia">Loop diameter (in centimeter)</label>
         <input type="number" min="0" step=".1" class="form-control form-control-lg" id="loop_dia" placeholder="Enter loop diameter" onChange="Calculate(this.form)">
 
-        <button type="button" class="btn btn-primary" onClick="Calculate(this.form)">Calculate</button>
+        <button type="button" class="btn btn-primary" onClick="Calculate_Loop(this.form)">Calculate</button>
     </div>
     <hr>
     <div class="form-group">
diff --git a/layouts/shortcodes/splice/calc_softshackle.html b/layouts/shortcodes/splice/calc_softshackle.html
new file mode 100644
index 0000000..3490832
--- /dev/null
+++ b/layouts/shortcodes/splice/calc_softshackle.html
@@ -0,0 +1,75 @@
+<script>
+function Calculate_Softshackle(obj)
+{
+    //All calculations in centimeters
+    tail = 53.33 * obj.line_diameter.value;
+	length1 = obj.shackle_length.value;
+	size =  obj.line_diameter.value;
+	body = length1 - 5.56 * size;
+
+    //Strech factor
+	stretch = 1.2;
+	if (size == .2) stretch = 1.1875;
+	if (size == .3) stretch = 1.23;
+	if (size == .4) stretch = 1.23;
+	if (size == .5) stretch = 1.21538;
+	if (size == .6) stretch = 1.2;
+
+    //Calculate
+    var inner_diameter          = body / Math.PI - 1.5 * size;
+    var inner_diameter_streched = inner_diameter * Math.PI / 2;
+	var load_diameter           = (body - 6 * size)  / Math.PI - 1.5 * size;
+	var length                  = 2 * tail+ (1 + stretch)  * body + 5.33* size;
+	var mark1                   = tail;
+	var mark2                   = stretch * body;
+
+
+    //Assign, round and format
+    obj.inner_diameter.value          =  inner_diameter         .toFixed(1) +"cm";
+    obj.inner_diameter_streched.value =  inner_diameter_streched.toFixed(1) +"cm";
+	obj.load_diameter.value           =  load_diameter          .toFixed(1) +"cm";
+    obj.length.value                  =  length                 .toFixed(1) +"cm";
+	obj.mark1.value                   =  mark1                  .toFixed(1) +"cm";
+	obj.mark2.value                   =  mark2                  .toFixed(1) +"cm";
+}
+</script>
+<form onsubmit="return false;">
+    <div class="form-group">
+        <label for="shackle_length">Shackle length (Tip of eye to inside of knot)</label>
+        <input type="number" min="0" step=".1" class="form-control form-control-lg" id="shackle_length" placeholder="Enter shackle length" onChange="Calculate(this.form)">
+
+        <label for="line_diameter">Line diameter</label>
+        <select class="form-control form-control-lg" name="line_diameter" onChange="Calculate(this.form)">
+             <option value=".2">2mm</option>
+             <option value=".3">3mm</option>
+             <option value=".4" selected>4mm</option>
+             <option value=".5">5mm</option>
+             <option value=".6">6mm</option>
+             <option value=".8">8mm</option>
+             <option value="1.0">10mm</option>
+             <option value="1.2">12mm</option>
+         </select>
+
+         <button type="button" class="btn btn-primary" onClick="Calculate_Softshackle(this.form)">Calculate</button>
+    </div>
+    <hr>
+    <div class="form-group">
+        <label for="inner_diameter">Inside diameter closed</label>
+        <input type="text" readonly class="form-control-plaintext" id="inner_diameter">
+
+        <label for="inner_diameter_streched">Inside diameter closed and streched</label>
+        <input type="text" readonly class="form-control-plaintext" id="inner_diameter_streched">
+
+        <label for="load_diameter">Max diameter of load</label>
+        <input type="text" readonly class="form-control-plaintext" id="load_diameter">
+
+        <label for="length">Total line needed</label>
+        <input type="text" readonly class="form-control-plaintext" id="length">
+     
+        <label for="mark1">Mark1 - From end</label>
+        <input type="text" readonly class="form-control-plaintext" id="mark1">
+
+        <label for="mark2">Mark2 - From first mark</label>
+        <input type="text" readonly class="form-control-plaintext" id="mark2">
+    </div>
+</form> 
\ No newline at end of file