ScriptableRenderPipeline/MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/SwizzleNode.cs

namespace UnityEngine.MaterialGraph
{
    [Title("Channels/Swizzle Node")]
    public class SwizzleNode : Function2Input
    {
        [SerializeField]
        private int[] m_SwizzleChannel = new int[4];

        public SwizzleNode()
        {
            name = "SwizzleNode";
        }

        /*
        public override float GetNodeUIHeight(float width)
        {
            return EditorGUIUtility.singleLineHeight;
        }

        public override GUIModificationType NodeUI(Rect drawArea)
        {
            base.NodeUI(drawArea);
            string[] channelNames = {"X", "Y", "Z", "W"};
            string[] values = {"0", "1", "Input1.x", "Input1.y", "Input1.z", "Input1.w", "Input2.x", "Input2.y", "Input2.z", "Input2.w"};
            EditorGUI.BeginChangeCheck();
            for (int n = 0; n < 4; n++)
                m_SwizzleChannel[n] = EditorGUI.Popup(new Rect(drawArea.x, drawArea.y, drawArea.width, EditorGUIUtility.singleLineHeight), channelNames[n] + "=", m_SwizzleChannel[n], values);
            if (EditorGUI.EndChangeCheck())
            {
                pixelGraph.RevalidateGraph();
                return GUIModificationType.Repaint;
            }
            return GUIModificationType.None;
        }
        */
        protected override string GetFunctionName()
        {
            return "";
        }

        protected override string GetFunctionCallBody(string inputValue1, string inputValue2)
        {
            string[] inputValues = { inputValue1, inputValue2 };
            string[] channelNames = { "x", "y", "z", "w" };
            string s = precision + "4(";
            for (int n = 0; n < 4; n++)
            {
                int c = m_SwizzleChannel[n];
                if (c < 2)
                    s += c;
                else
                {
                    c -= 2;
                    s += inputValues[c >> 2] + "." + channelNames[c & 3];
                }
                s += (n == 3) ? ")" : ",";
            }
            return s;
        }
    }
}