ScriptableRenderPipeline/MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/Art/Adjustments/ContrastNode.cs

using System.Reflection;

namespace UnityEngine.MaterialGraph
{
	[Title ("Art/Adjustments/Contrast")]
	public class ContrastNode : CodeFunctionNode
	{
		public ContrastNode()
		{
			name = "Contrast";
		}

	    protected override MethodInfo GetFunctionToConvert()
	    {
	        return GetType().GetMethod("Unity_Contrast", BindingFlags.Static | BindingFlags.NonPublic);
	    }

	    static string Unity_Contrast(
	        [Slot(0, Binding.None)] Vector3 input,
	        [Slot(1, Binding.None)] Vector1 contrast,
	        [Slot(2, Binding.None)] Vector1 midPoint,
	        [Slot(3, Binding.None)] out Vector3 result)
	    {
	        result = Vector2.zero;
	        return
	            @"
{
    // Contrast (reacts better when applied in log)
    // Optimal range: [0.0, 2.0]]
    // From PostProcessing
    result =  (input - midPoint) * contrast + midPoint;
}";
	    }
	}
}