Add BakedPointCloud support

Assets/Pcx/Editor/PlyImporter.cs

@@ -18,7 +18,7 @@ class PlyImporter : ScriptedImporter
     {
         #region ScriptedImporter implementation
 
-        public enum ContainerType { Mesh, ComputeBuffer  }
+        public enum ContainerType { Mesh, ComputeBuffer, Texture  }
 
         [SerializeField] ContainerType _containerType = ContainerType.Mesh;
 
@@ -42,7 +42,7 @@ public override void OnImportAsset(AssetImportContext context)
 
                 context.SetMainObject(gameObject);
             }
-            else
+            else if (_containerType == ContainerType.ComputeBuffer)
             {
                 // ComputeBuffer container
                 // Create a prefab with PointCloudRenderer.
@@ -57,6 +57,19 @@ public override void OnImportAsset(AssetImportContext context)
 
                 context.SetMainObject(gameObject);
             }
+            else // _containerType == ContainerType.Texture
+            {
+                // Texture container
+                // No prefab is available for this type.
+                var data = ImportAsBakedPointCloud(context.assetPath);
+                if (data != null)
+                {
+                    context.AddObjectToAsset("container", data);
+                    context.AddObjectToAsset("position", data.positionMap);
+                    context.AddObjectToAsset("color", data.colorMap);
+                    context.SetMainObject(data);
+                }
+            }
         }
 
         #endregion
@@ -194,6 +207,25 @@ PointCloudData ImportAsPointCloudData(string path)
             }
         }
 
+        BakedPointCloud ImportAsBakedPointCloud(string path)
+        {
+            try
+            {
+                var stream = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read);
+                var header = ReadDataHeader(new StreamReader(stream));
+                var body = ReadDataBody(header, new BinaryReader(stream));
+                var data = ScriptableObject.CreateInstance<BakedPointCloud>();
+                data.Initialize(body.vertices, body.colors);
+                data.name = Path.GetFileNameWithoutExtension(path);
+                return data;
+            }
+            catch (Exception e)
+            {
+                Debug.LogError("Failed importing " + path + ". " + e.Message);
+                return null;
+            }
+        }
+
         DataHeader ReadDataHeader(StreamReader reader)
         {
             var data = new DataHeader();

Assets/Pcx/Runtime/BakedPointCloud.cs

@@ -0,0 +1,77 @@
+// Pcx - Point cloud importer & renderer for Unity
+// https://github.com/keijiro/Pcx
+
+using UnityEngine;
+using System.Collections.Generic;
+
+namespace Pcx
+{
+    /// A container class for texture-baked point clouds.
+    public sealed class BakedPointCloud : ScriptableObject
+    {
+        #region Public properties
+
+        /// Number of points
+        public int pointCount { get { return _pointCount; } }
+
+        /// Position map texture
+        public Texture2D positionMap { get { return _positionMap; } }
+
+        /// Color map texture
+        public Texture2D colorMap { get { return _colorMap; } }
+
+        #endregion
+
+        #region Serialized data members
+
+        [SerializeField] int _pointCount;
+        [SerializeField] Texture2D _positionMap;
+        [SerializeField] Texture2D _colorMap;
+
+        #endregion
+
+        #region Editor functions
+
+        #if UNITY_EDITOR
+
+        public void Initialize(List<Vector3> positions, List<Color32> colors)
+        {
+            _pointCount = positions.Count;
+
+            var width = Mathf.CeilToInt(Mathf.Sqrt(_pointCount));
+
+            _positionMap = new Texture2D(width, width, TextureFormat.RGBAHalf, false);
+            _positionMap.name = "Position Map";
+            _positionMap.filterMode = FilterMode.Point;
+
+            _colorMap = new Texture2D(width, width, TextureFormat.RGBA32, false);
+            _colorMap.name = "Color Map";
+            _colorMap.filterMode = FilterMode.Point;
+
+            var i1 = 0;
+            var i2 = 0U;
+
+            for (var y = 0; y < width; y++)
+            {
+                for (var x = 0; x < width; x++)
+                {
+                    var i = i1 < _pointCount ? i1 : (int)(i2 % _pointCount);
+                    var p = positions[i];
+
+                    _positionMap.SetPixel(x, y, new Color(p.x, p.y, p.z));
+                    _colorMap.SetPixel(x, y, colors[i]);
+
+                    i1 ++;
+                    i2 += 132049U; // prime
+                }
+            }
+
+            _positionMap.Apply(false, true);
+            _colorMap.Apply(false, true);
+        }
+
+        #endif
+
+        #endregion
+    }
+}