Add Set Parameter node to Anim Graph

#2162

Source/Editor/Surface/Archetypes/Parameters.cs

@@ -1100,6 +1100,27 @@ namespace FlaxEditor.Surface.Archetypes
                     NodeElementArchetype.Factory.ComboBox(2 + 20, 0, 116)
                 }
             },
+            new NodeArchetype
+            {
+                TypeID = 5,
+                Create = (id, context, arch, groupArch) => new SurfaceNodeParamsSet(id, context, arch, groupArch),
+                Title = "Set Parameter",
+                Description = "Parameter value setter invoked when the animation pose is evaluated (output pose comes from input)",
+                Flags = NodeFlags.AnimGraph,
+                Size = new Float2(140, 40),
+                DefaultValues = new object[]
+                {
+                    Guid.Empty,
+                    null
+                },
+                Elements = new[]
+                {
+                    NodeElementArchetype.Factory.Output(0, string.Empty, typeof(void), 0),
+                    NodeElementArchetype.Factory.Input(0, string.Empty, true, typeof(void), 2),
+                    NodeElementArchetype.Factory.Input(1, string.Empty, true, ScriptType.Null, 1, 1),
+                    NodeElementArchetype.Factory.ComboBox(2 + 20, 0, 116)
+                }
+            },
         };
     }
 }

Source/Engine/Animations/Graph/AnimGroup.Animation.cpp

@@ -958,6 +958,21 @@ void AnimGraphExecutor::ProcessGroupParameters(Box* box, Node* node, Value& valu
         }
         break;
     }
+    // Set Parameter
+    case 5:
+    {
+        // Set parameter value
+        int32 paramIndex;
+        const auto param = _graph.GetParameter((Guid)node->Values[0], paramIndex);
+        if (param)
+        {
+            context.Data->Parameters[paramIndex].Value = tryGetValue(node->GetBox(1), 1, Value::Null);
+        }
+
+        // Pass over the pose
+        value = tryGetValue(node->GetBox(2), Value::Null);
+        break;
+    }
     default:
         break;
     }