ShaderGraph : Added main light color node

Author: TothBenoit

hrt/shgraph/nodes/MainLightColor.hx

@@ -0,0 +1,20 @@
+package hrt.shgraph.nodes;
+
+using hxsl.Ast;
+
+@name("MainLightColor")
+@description("Get the main light color")
+@group("Property")
+class MainLightColor extends ShaderNodeHxsl {
+
+	static var SRC = {
+		@sgoutput var output : Vec3;
+
+        @global var mainLightColor : Vec3;
+        @global var mainLightPower : Float;
+
+		function fragment() {
+			output = mainLightColor * mainLightPower;
+		}
+	};
+}