From aebfcc7885abd3bac4b2148c8f057f644fc7dfc0 Mon Sep 17 00:00:00 2001
From: "G.Ambatte" <sean@robertson-family.nz>
Date: Sun, 21 Jul 2024 00:18:06 +1200
Subject: [PATCH] Add new var math functions

---
 shared/naturalcrit/markdown.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/shared/naturalcrit/markdown.js b/shared/naturalcrit/markdown.js
index 39939f306..3dfc6c348 100644
--- a/shared/naturalcrit/markdown.js
+++ b/shared/naturalcrit/markdown.js
@@ -46,6 +46,27 @@ const mathParser = new MathParser({
 		array       : false, fndef       : false
 	}
 });
+// Add absolute function
+mathParser.functions.abs = function (a) {
+	return Math.abs(a);
+};
+// Add sign function
+mathParser.functions.sign = function (a) {
+	if(a == 0) return '';
+	if(a > 0) {
+		return '\\+';
+	} else {
+		return '\\-';
+	}
+};
+// Add signed function
+mathParser.functions.signed = function (a) {
+	if(a >= 0) {
+		return `\\+${a}`;
+	} else {
+		return `\\${a}`;
+	}
+};
 
 //Processes the markdown within an HTML block if it's just a class-wrapper
 renderer.html = function (html) {