DYN-3896 Add support for geometry instancing in render pipeline

src/DynamoCore/Scheduler/UpdateRenderPackageAsyncTask.cs

@@ -6,6 +6,7 @@
 using Autodesk.DesignScript.Interfaces;
 using Dynamo.Engine;
 using Dynamo.Graph.Nodes;
+using Dynamo.Models;
 using Dynamo.Visualization;
 using ProtoCore.Mirror;
 
@@ -210,6 +211,7 @@ private void GetRenderPackagesFromMirrorDataImp(
         private void GetTessellationDataFromGraphicItem(Guid outputPortId, IGraphicItem graphicItem, string labelKey, ref IRenderPackage package)
         {
             var packageWithTransform = package as ITransformable;
+            var packageWithInstances = package as IInstancingRenderPackage;
 
             try
             {
@@ -218,10 +220,45 @@ private void GetTessellationDataFromGraphicItem(Guid outputPortId, IGraphicItem
                 var previousMeshVertexCount = package.MeshVertexCount;
 
                 //Todo Plane tessellation needs to be handled here vs in LibG currently
+                bool instancingEnabled = DynamoModel.FeatureFlags.CheckFeatureFlag<bool>("graphics-primitive-instancing", false);
                 if (graphicItem is Plane plane)
                 {
                     CreatePlaneTessellation(package, plane);
                 }
+                else if (graphicItem is IInstanceableGraphicItem instanceableItem &&
+                    instanceableItem.InstanceInfoAvailable 
+                    && packageWithInstances != null
+                    && instancingEnabled)
+                {
+                    //if we have not generated the base tessellation for this type yet, generate it
+                    if (!packageWithInstances.ContainsTessellationId(instanceableItem.BaseTessellationGuid))
+
+                    {
+                        instanceableItem.AddBaseTessellation(packageWithInstances, factory.TessellationParameters);
+                        var prevLineIndex = package.LineVertexCount;
+                        //if edges is on, then also add edges to base tessellation.
+                        if (factory.TessellationParameters.ShowEdges)
+                        {
+                            //TODO if we start to instance more types, expand this edge generation.
+                            if (graphicItem is Topology topology)
+                            {
+                                var edges = topology.Edges;
+                                foreach (var geom in edges.Select(edge => edge.CurveGeometry))
+                                {
+                                    geom.Tessellate(package, factory.TessellationParameters);
+                                    geom.Dispose();
+                                }
+
+                                edges.ForEach(x => x.Dispose());
+                                packageWithInstances.AddInstanceGuidForLineVertexRange(prevLineIndex, package.LineVertexCount - 1, instanceableItem.BaseTessellationGuid);
+                            }
+                        }
+                    }
+
+                    instanceableItem.AddInstance(packageWithInstances, factory.TessellationParameters, labelKey);
+
+                    return;
+                }
                 else
                 {
                     try

src/DynamoCoreWpf/Rendering/HelixRenderPackage.cs

@@ -37,7 +37,7 @@ public IRenderPackage CreateRenderPackage()
     /// A Helix-specifc IRenderPackage implementation.
     /// </summary>
     [Obsolete("Do not use! This will be moved to a new project in a future version of Dynamo.")]
-    public class HelixRenderPackage : IRenderPackage, ITransformable, IRenderLabels, IRenderPackageSupplement
+    public class HelixRenderPackage : IRenderPackage, ITransformable, IRenderLabels, IRenderPackageSupplement, IInstancingRenderPackage
     {
         #region private members
 
@@ -50,7 +50,7 @@ public class HelixRenderPackage : IRenderPackage, ITransformable, IRenderLabels,
         private int colorStride;
         private List< byte[]> colorsList = new List<byte[]>();
         private List<int> colorStrideList = new List<int>();
-        private List<Tuple<int, int>> colorsMeshVerticesRange = new List<Tuple<int, int>>();
+        internal Dictionary<Guid, List<Matrix>> instanceTransforms = new Dictionary<Guid, List<Matrix>>();
 
         #endregion
 
@@ -215,7 +215,7 @@ public void Clear()
 
             colorsList.Clear();
             colorStrideList.Clear();
-            colorsMeshVerticesRange.Clear();
+            MeshVerticesRangesAssociatedWithTextureMaps.Clear();
         }
 
         /// <summary>
@@ -379,12 +379,12 @@ public void ApplyMeshVertexColors(byte[] colors)
             mesh.Colors = colors.ToColor4Collection();
         }
 
-        private bool HasValidStartEnd(int startIndex, int endIndex, Geometry3D geom, out string message)
+        private bool ValidateRange<T>(int startIndex, int endIndex, ICollection<T> geomDataCollection, out string message)
         {
             message = string.Empty;
 
-            if (startIndex > geom.Colors.Count ||
-                endIndex > geom.Colors.Count - 1)
+            if (startIndex > geomDataCollection.Count ||
+                endIndex > geomDataCollection.Count - 1)
             {
                 message = "The start and end indices must be within the bounds of the array.";
                 return false;
@@ -644,7 +644,7 @@ public void ClearLabels()
         /// <param name="alpha">byte for the alpha RGB value</param>
         public void UpdatePointVertexColorForRange(int startIndex, int endIndex, byte red, byte green, byte blue, byte alpha)
         {
-            if (!HasValidStartEnd(startIndex, endIndex, points, out var message))
+            if (!ValidateRange(startIndex, endIndex, points.Colors, out var message))
             {
                 throw new Exception(message);
             }
@@ -680,7 +680,7 @@ public void AppendPointVertexColorRange(byte[] colors)
         /// <param name="alpha">byte for the alpha RGB value</param>
         public void UpdateLineVertexColorForRange(int startIndex, int endIndex, byte red, byte green, byte blue, byte alpha)
         {
-            if (!HasValidStartEnd(startIndex, endIndex, lines, out var message))
+            if (!ValidateRange(startIndex, endIndex, lines.Colors, out var message))
             {
                 throw new Exception(message);
             }
@@ -716,7 +716,7 @@ public void AppendLineVertexColorRange(byte[] colors)
         /// <param name="alpha">byte for the alpha RGB value</param>
         public void UpdateMeshVertexColorForRange(int startIndex, int endIndex, byte red, byte green, byte blue, byte alpha)
         {
-            if (!HasValidStartEnd(startIndex, endIndex, mesh, out var message))
+            if (!ValidateRange(startIndex, endIndex, mesh.Colors, out var message))
             {
                 throw new Exception(message);
             }
@@ -761,10 +761,7 @@ public List<int> TextureMapsStrideList
         /// <summary>
         /// A list of mesh vertices ranges that have associated texture maps
         /// </summary>
-        public List<Tuple<int, int>> MeshVerticesRangesAssociatedWithTextureMaps
-        {
-            get { return colorsMeshVerticesRange; }
-        }
+        public List<Tuple<int, int>> MeshVerticesRangesAssociatedWithTextureMaps { get; } = new List<Tuple<int, int>>();
 
         /// <summary>
         /// Set a color texture map for a specific range of mesh vertices
@@ -775,34 +772,174 @@ public List<Tuple<int, int>> MeshVerticesRangesAssociatedWithTextureMaps
         /// <param name="stride">The size of one dimension of the colors array</param>
         public void AddTextureMapForMeshVerticesRange(int startIndex, int endIndex, byte[] textureMap, int stride)
         {
-            if (!HasValidStartEnd(startIndex, endIndex, mesh, out var message))
+            if (!ValidateRange(startIndex, endIndex, mesh.Colors, out var message))
             {
                 throw new Exception(message);
             }
 
-            foreach (var r in colorsMeshVerticesRange)
+            foreach (var r in MeshVerticesRangesAssociatedWithTextureMaps)
             {
                 if (startIndex >= r.Item1 && startIndex <= r.Item2 || endIndex >= r.Item1 && endIndex <= r.Item2)
                 {
                     throw new Exception("The start and end indices must not overlap previously defined ranges.");
                 }
             }
-            
-            colorsMeshVerticesRange.Add(new Tuple<int, int>(startIndex, endIndex));
+
+            MeshVerticesRangesAssociatedWithTextureMaps.Add(new Tuple<int, int>(startIndex, endIndex));
             colorsList.Add(textureMap);
             colorStrideList.Add(stride);
         }
 
         /// <summary>
         /// Allow legacy usage of the color methods in IRenderPackage
         /// This flag is used by the UpdateRenderPackageAsyncTask implementation to flag
-        /// any third party usage of deprecated color methods in IRenderPackage API
+        /// any third party usage of deprecated color methods in IRenderPackageSupplement.MeshVerticesRangesAssociatedWithTextureMaps
         /// </summary>
         [Obsolete("Do not use! This will be removed in Dynamo 3.0")]
         public bool AllowLegacyColorOperations { get; set; } = true;
 
         #endregion
 
+        /// <summary>
+        /// A list of mesh vertices ranges that have associated instance references
+        /// </summary>
+        internal Dictionary<Guid, (int start, int end)> MeshVertexRangesAssociatedWithInstancing { get; } = new Dictionary<Guid, (int start, int end)>();
+
+        /// <summary>
+        /// Set an instance reference for a specific range of mesh vertices
+        /// </summary>
+        /// <param name="startIndex">The index associated with the first vertex in MeshVertices we want to associate with the instance matrices
+        /// <param name="endIndex">The index associated with the last vertex in MeshVertices we want to associate with the instance matrices
+        /// <param name="id">A unique id associated with this tessellation geometry for instancing</param>
+        public void AddInstanceGuidForMeshVertexRange(int startIndex, int endIndex, Guid id)
+        {
+            if (!ValidateRange(startIndex, endIndex, mesh.Positions, out var message))
+            {
+                throw new Exception(message);
+            }
+
+            if(MeshVertexRangesAssociatedWithInstancing.ContainsKey(id))
+            {
+                throw new Exception("The reference to the mesh range for this ID already exists.");
+            }
+
+            MeshVertexRangesAssociatedWithInstancing.Add(id, (startIndex, endIndex));
+        }
+
+        /// <summary>
+        /// A list of line vertices ranges that have associated instance references
+        /// </summary>
+        internal Dictionary<Guid, (int start, int end)> LineVertexRangesAssociatedWithInstancing { get; } = new Dictionary<Guid, (int start, int end)>();
+
+        /// <summary>
+        /// Set an instance reference for a specific range of line vertices
+        /// </summary>
+        /// <param name="startIndex">The index associated with the first vertex in LineVertices we want to associate with the instance matrices
+        /// <param name="endIndex">The index associated with the last vertex in LineVertices we want to associate with the instance matrices
+        /// <param name="id">A unique id associated with this tessellation geometry for instancing</param>
+        public void AddInstanceGuidForLineVertexRange(int startIndex, int endIndex, Guid id)
+        {
+            if (!ValidateRange(startIndex, endIndex, lines.Positions, out var message))
+            {
+                throw new Exception(message);
+            }
+
+            if (LineVertexRangesAssociatedWithInstancing.ContainsKey(id))
+            {
+                throw new Exception("The reference to the line range for this ID already exists.");
+            }
+
+            LineVertexRangesAssociatedWithInstancing.Add(id, (startIndex, endIndex));
+        }
+
+        /// <summary>
+        /// Set the transform using a series of doubles. The resulting transform is applied to all geometry in the renderPackage.
+        /// Following conventional matrix notation, m11 is the value of the first row and first column, and m12
+        /// is the value of the first row and second column.
+        /// NOTE: This method will set the matrix exactly as described by the caller.
+        /// </summary>
+        /// <param name="m11"></param>
+        /// <param name="m12"></param>
+        /// <param name="m13"></param>
+        /// <param name="m14"></param>
+        /// <param name="m21"></param>
+        /// <param name="m22"></param>
+        /// <param name="m23"></param>
+        /// <param name="m24"></param>
+        /// <param name="m31"></param>
+        /// <param name="m32"></param>
+        /// <param name="m33"></param>
+        /// <param name="m34"></param>
+        /// <param name="m41"></param>
+        /// <param name="m42"></param>
+        /// <param name="m43"></param>
+        /// <param name="m44"></param>
+        public void AddInstanceMatrix(float m11, float m12, float m13, float m14,
+            float m21, float m22, float m23, float m24,
+            float m31, float m32, float m33, float m34,
+            float m41, float m42, float m43, float m44, Guid id)
+        {
+            if (!ContainsTessellationId(id))
+            {
+                throw new Exception("The reference to the graphics range(mesh or line) for this ID does not exists.");
+            }
+
+            var transform = new Matrix(m11, m12, m13, m14, m21, m22, m23, m24, m31, m32, m33, m34, m41, m42, m43, m44);
+
+            List<Matrix> transforms;
+            if (instanceTransforms.TryGetValue(id, out transforms))
+            {
+                transforms.Add(transform);
+            }
+            else
+            {
+                instanceTransforms.Add(id, new List<Matrix> {transform});
+            }
+        }
+
+        /// <summary>
+        /// Set the transform as a double array, this transform is applied to all geometry in the renderPackage.
+        /// This matrix should be laid out as follows in row vector order:
+        /// [Xx,Xy,Xz, 0,
+        ///  Yx, Yy, Yz, 0,
+        ///  Zx, Zy, Zz, 0,
+        ///  offsetX, offsetY, offsetZ, W]
+        /// NOTE: The caller of this method should transform the matrix from row vector order to whatever form is needed by the implementation.
+        /// When converting from ProtoGeometry CoordinateSystem form to input matrix, set the first row to the X axis of the CS,
+        /// the second row to the Y axis of the CS, the third row to the Z axis of the CS, and the last row to the CS origin, where W = 1. 
+        /// </summary>
+        /// <param name="matrix"></param>
+        public void AddInstanceMatrix(float[] matrix, Guid id) 
+        {
+            if (!ContainsTessellationId(id))
+            {
+                throw new Exception("The reference to the graphics range(mesh or line) for this ID does not exists.");
+            }
+
+            var transform = new Matrix(matrix);
+
+            List<Matrix> transforms;
+            if (instanceTransforms.TryGetValue(id, out transforms))
+            {
+                transforms.Add(transform);
+            }
+            else
+            {
+                instanceTransforms.Add(id, new List<Matrix> { transform });
+            }
+        }
+
+        /// <summary>
+        /// Checks if a base tessellation guid has already been registered with this <see cref="IInstancingRenderPackage"/>.
+        /// Both Line and Mesh ids are checked.
+        /// </summary>
+        /// <param name="id"></param>
+        /// <returns></returns>
+        public bool ContainsTessellationId(Guid id)
+        {
+            return MeshVertexRangesAssociatedWithInstancing.ContainsKey(id) || LineVertexRangesAssociatedWithInstancing.ContainsKey(id);
+        }
+
         public MeshGeometry3D Mesh
         {
             get { return mesh; }