added Ratangle Mask and FWidth

Source/Editor/Surface/Archetypes/Material.cs

@@ -882,6 +882,44 @@ namespace FlaxEditor.Surface.Archetypes
                     NodeElementArchetype.Factory.Output(1, "Inv Size", typeof(Float2), 1),
                 }
             },
+            new NodeArchetype
+            {
+                TypeID = 40,
+                Title = "Ratangle Mask",
+                Description = "Creates a Ratangle mask",
+                Flags = NodeFlags.MaterialGraph,
+                Size = new Float2(150, 100),
+                ConnectionsHints = ConnectionsHint.Vector,
+                DefaultValues = new object[]
+                {
+                    new Float2(0, 0),
+                    new Float2(0.5f, 0.5f),
+                },
+                Elements = new[]
+                {
+                    NodeElementArchetype.Factory.Input(0, "UV", true, typeof(Float2), 0),
+                    NodeElementArchetype.Factory.Input(1, "Ratangle", true, typeof(Float2), 1),
+                    NodeElementArchetype.Factory.Output(0, string.Empty, typeof(float), 5),
+                }
+            },
+            new NodeArchetype
+            {
+                TypeID = 41,
+                Title = "FWidth",
+                Description = "Creates a Partial Derivatives (fwidth)",
+                Flags = NodeFlags.MaterialGraph,
+                Size = new Float2(150, 100),
+                ConnectionsHints = ConnectionsHint.Vector,
+                DefaultValues = new object[]
+                {
+                    1
+                },
+                Elements = new[]
+                {
+                    NodeElementArchetype.Factory.Input(0, "value", true, typeof(float), 0),
+                    NodeElementArchetype.Factory.Output(0, string.Empty, typeof(float), 5),
+                }
+            },
         };
     }
 }

Source/Engine/Tools/MaterialGenerator/MaterialGenerator.Material.cpp

@@ -519,6 +519,25 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
         }
         break;
     }
+    // Ratangle Mask
+    case 40:
+    {
+        const auto uv = tryGetValue(node->GetBox(0), getUVs).AsFloat2();
+        const auto ratangle = tryGetValue(node->GetBox(1), node->Values[1]).AsFloat2();
+
+        auto d      = writeLocal(ValueType::Float2, String::Format(TEXT("abs({0} * 2 - 1) - {1}"),uv.Value, ratangle.Value), node);
+        auto fwidth = writeLocal(ValueType::Float , String::Format(TEXT("abs(ddx({0})) + abs(ddy({0}))"), d.Value), node);
+        auto d2     = writeLocal(ValueType::Float , String::Format(TEXT("1 - {0} / {1}"), d.Value, fwidth.Value), node);
+        value       = writeLocal(ValueType::Float , String::Format(TEXT("saturate(min({0}.x, {0}.y))"), d2.Value), node);
+        break;
+    }
+    // FWidth
+    case 41:
+    {
+        const auto d = tryGetValue(node->GetBox(0), node->Values[0]).AsFloat();
+        value =  writeLocal(ValueType::Float, String::Format(TEXT("abs(ddx({0})) + abs(ddy({0}))"), d.Value), node);
+        break;
+    }
     default:
         break;
     }