tweaks

Author: svgeesus

css-color/matrixmaker.html

@@ -24,6 +24,7 @@
 		const xwhite=0.3127 ;
 		const ywhite=0.3290 ;
 
+		
 		// Relative XYZ values. Copy-paste-o-rama
 		var XWhite=xwhite/ywhite;
 		var YWhite=1;
@@ -35,9 +36,26 @@
 
 		var XGreen=xgreen/ygreen;
 		var YGreen=1;
-		var ZGreen=(1 - xgreen - ygreen)/green;
-		
-		var white = math.matrix([])
+		var ZGreen=(1 - xgreen - ygreen)/ygreen;
+		
+		var XBlue=xblue/yblue;
+		var YBlue=1;
+		var ZBlue=(1 - xblue - yblue)/yblue;
+		
+		var white = math.matrix([XWhite, YWhite, ZWhite]);
+		var primaries = [
+			[XRed, XGreen, XBlue],
+			[YRed, YGreen, YBlue],
+			[ZRed, ZGreen, ZBlue]
+		];
+		
+		// S is easier if it ends up as an array than a matrix
+		// but we use matrix math to calculate it
+		var S = math.multiply(math.inv(math.matrix(primaries)),white).value;
+		
+		var M = math.matrix([
+			[]
+		]);
 
 	</script>
 </html>