CombineAlpha node

hrt/shgraph/nodes/CombineAlpha.hx

@@ -0,0 +1,60 @@
+package hrt.shgraph.nodes;
+
+import hxsl.Types.Vec;
+import hxsl.*;
+
+using hxsl.Ast;
+
+@name("Combine Alpha")
+@description("Create a vector of size 4 from a RGB and an Alpha float")
+@group("Channel")
+class CombineAlpha extends ShaderNode {
+
+	@input("RGB") var rgb = SType.Vec3;
+	@input("A", true) var a = SType.Float;
+
+	@output("RGBA") var output = SType.Vec4;
+
+	override public function computeOutputs() {
+
+		addOutput("output", TVec(4, VFloat));
+	}
+
+	override public function build(key : String) : TExpr {
+
+		var args = [];
+		var valueArgs = [];
+		var opTGlobal : TGlobal = Vec4;
+		args.push({ name: "rgb", type : TVec(3, VFloat) });
+		valueArgs.push(rgb.getVar());
+		args.push({ name: "a", type : TFloat });
+		valueArgs.push(a.getVar());
+		opTGlobal = Vec4;
+
+		return {
+			p : null,
+			t : output.type,
+			e : TBinop(OpAssign, {
+				e: TVar(output),
+				p: null,
+				t : output.type
+			},
+			{
+				e: TCall({
+					e: TGlobal(opTGlobal),
+					p: null,
+					t: TFun([
+						{
+							ret: output.type,
+							args: args
+						}
+					])
+				}, valueArgs
+				),
+				p: null,
+				t: output.type
+			})
+		};
+	}
+
+}