Editing: merge, move splats, bake transform when exporting

package/Editor/GaussianMoveTool.cs

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: MIT
+
+using GaussianSplatting.Runtime;
+using UnityEditor;
+using UnityEditor.EditorTools;
+using UnityEngine;
+
+namespace GaussianSplatting.Editor
+{
+    [EditorTool("Gaussian Move Tool", typeof(GaussianSplatRenderer), typeof(GaussianToolContext))]
+    class GaussianMoveTool : GaussianTool
+    {
+        public override void OnToolGUI(EditorWindow window)
+        {
+            var gs = GetRenderer();
+            if (!gs || !CanBeEdited() || !HasSelection())
+                return;
+            var tr = gs.transform;
+
+            EditorGUI.BeginChangeCheck();
+            var selCenterLocal = GetSelectionCenterLocal();
+            var selCenterWorld = tr.TransformPoint(selCenterLocal);
+            var newPosWorld = Handles.DoPositionHandle(selCenterWorld, Tools.handleRotation);
+            if (EditorGUI.EndChangeCheck())
+            {
+                var newPosLocal = tr.InverseTransformPoint(newPosWorld);
+                var wasModified = gs.editModified;
+                gs.EditTranslateSelection(newPosLocal - selCenterLocal);
+                if (!wasModified)
+                    GaussianSplatRendererEditor.RepaintAll();
+                Event.current.Use();
+            }
+        }
+    }
+}

package/Editor/GaussianRotateTool.cs

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: MIT
+
+using GaussianSplatting.Runtime;
+using UnityEditor;
+using UnityEditor.EditorTools;
+using UnityEngine;
+
+namespace GaussianSplatting.Editor
+{
+    /* not working correctly yet
+    [EditorTool("Gaussian Rotate Tool", typeof(GaussianSplatRenderer), typeof(GaussianToolContext))]
+    class GaussianRotateTool : GaussianTool
+    {
+        Quaternion m_CurrentRotation = Quaternion.identity;
+        Vector3 m_FrozenSelCenterLocal = Vector3.zero;
+        bool m_FreezePivot = false;
+
+        public override void OnActivated()
+        {
+            m_FreezePivot = false;
+        }
+
+        public override void OnToolGUI(EditorWindow window)
+        {
+            var gs = GetRenderer();
+            if (!gs || !CanBeEdited() || !HasSelection())
+                return;
+            var tr = gs.transform;
+            var evt = Event.current;
+
+            var selCenterLocal = GetSelectionCenterLocal();
+            if (evt.type == EventType.MouseDown)
+            {
+                gs.EditStorePosMouseDown();
+                gs.EditStoreOtherMouseDown();
+                m_FrozenSelCenterLocal = selCenterLocal;
+                m_FreezePivot = true;
+            }
+            if (evt.type == EventType.MouseUp)
+            {
+                m_CurrentRotation = Quaternion.identity;
+                m_FreezePivot = false;
+            }
+
+            if (m_FreezePivot)
+                selCenterLocal = m_FrozenSelCenterLocal;
+
+            EditorGUI.BeginChangeCheck();
+            var selCenterWorld = tr.TransformPoint(selCenterLocal);
+            var newRotation = Handles.DoRotationHandle(m_CurrentRotation, selCenterWorld);
+            if (EditorGUI.EndChangeCheck())
+            {
+                Matrix4x4 localToWorld = gs.transform.localToWorldMatrix;
+                Matrix4x4 worldToLocal = gs.transform.worldToLocalMatrix;
+                var wasModified = gs.editModified;
+                var rotToApply = newRotation;
+                gs.EditRotateSelection(selCenterLocal, localToWorld, worldToLocal, rotToApply);
+                m_CurrentRotation = newRotation;
+                if (!wasModified)
+                    GaussianSplatRendererEditor.RepaintAll();
+
+                if(GUIUtility.hotControl == 0)
+                {
+                    m_CurrentRotation = Tools.handleRotation;
+                }
+            }
+        }
+    }
+    */
+}

package/Editor/GaussianScaleTool.cs

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: MIT
+
+using GaussianSplatting.Runtime;
+using UnityEditor;
+using UnityEditor.EditorTools;
+using UnityEngine;
+
+namespace GaussianSplatting.Editor
+{
+    /* // not working correctly yet when the GS itself has scale
+    [EditorTool("Gaussian Scale Tool", typeof(GaussianSplatRenderer), typeof(GaussianToolContext))]
+    class GaussianScaleTool : GaussianTool
+    {
+        Vector3 m_CurrentScale = Vector3.one;
+        Vector3 m_FrozenSelCenterLocal = Vector3.zero;
+        bool m_FreezePivot = false;
+
+        public override void OnActivated()
+        {
+            m_FreezePivot = false;
+        }
+
+        public override void OnToolGUI(EditorWindow window)
+        {
+            var gs = GetRenderer();
+            if (!gs || !CanBeEdited() || !HasSelection())
+                return;
+            var tr = gs.transform;
+            var evt = Event.current;
+
+            var selCenterLocal = GetSelectionCenterLocal();
+            if (evt.type == EventType.MouseDown)
+            {
+                gs.EditStorePosMouseDown();
+                m_FrozenSelCenterLocal = selCenterLocal;
+                m_FreezePivot = true;
+            }
+            if (evt.type == EventType.MouseUp)
+            {
+                m_CurrentScale = Vector3.one;
+                m_FreezePivot = false;
+            }
+
+            if (m_FreezePivot)
+                selCenterLocal = m_FrozenSelCenterLocal;
+
+            EditorGUI.BeginChangeCheck();
+            var selCenterWorld = tr.TransformPoint(selCenterLocal);
+            m_CurrentScale = Handles.DoScaleHandle(m_CurrentScale, selCenterWorld, Tools.handleRotation, HandleUtility.GetHandleSize(selCenterWorld));
+            if (EditorGUI.EndChangeCheck())
+            {
+                Matrix4x4 localToWorld = Matrix4x4.identity;
+                Matrix4x4 worldToLocal = Matrix4x4.identity;
+                if (Tools.pivotRotation == PivotRotation.Global)
+                {
+                    localToWorld = gs.transform.localToWorldMatrix;
+                    worldToLocal = gs.transform.worldToLocalMatrix;
+                }
+                var wasModified = gs.editModified;
+                gs.EditScaleSelection(selCenterLocal, localToWorld, worldToLocal, m_CurrentScale);
+                if (!wasModified)
+                    GaussianSplatRendererEditor.RepaintAll();
+                evt.Use();
+            }
+        }
+    }
+    */
+}