Reflection Probes: Retain world-space capture position when influence volume is resized. Previously, capture position would scale with the size of the influence volume, because it is serialized in proxy space, and no special logic existed to handle its transform. (#22)

Author: pastasfuture

com.unity.render-pipelines.high-definition/Editor/Lighting/Reflection/HDProbeUI.Handles.cs

@@ -15,7 +15,7 @@ internal static void DrawHandles(SerializedHDProbe serialized, Editor owner)
             switch (EditMode.editMode)
             {
                 case EditBaseShape:
-                    InfluenceVolumeUI.DrawHandles_EditBase(serialized.probeSettings.influence, owner, probe.transform);
+                    InfluenceVolumeUI.DrawHandles_EditBase(serialized.probeSettings.influence, owner, probe.transform, serialized.probeSettings.proxyCapturePositionProxySpace);
                     break;
                 case EditInfluenceShape:
                     InfluenceVolumeUI.DrawHandles_EditInfluence(serialized.probeSettings.influence, owner, probe.transform);

com.unity.render-pipelines.high-definition/Editor/Lighting/Reflection/Volume/InfluenceVolumeUI.Handles.cs

@@ -5,12 +5,12 @@ namespace UnityEditor.Rendering.HighDefinition
 {
     partial class InfluenceVolumeUI
     {
-        public static void DrawHandles_EditBase(SerializedInfluenceVolume serialized, Editor owner, Transform transform)
+        public static void DrawHandles_EditBase(SerializedInfluenceVolume serialized, Editor owner, Transform transform, SerializedProperty proxyCapturePositionProxySpace)
         {
             switch ((InfluenceShape)serialized.shape.intValue)
             {
                 case InfluenceShape.Box:
-                    DrawBoxHandle(serialized, owner, transform, s_BoxBaseHandle);
+                    DrawBoxHandle(serialized, owner, transform, s_BoxBaseHandle, proxyCapturePositionProxySpace);
                     break;
                 case InfluenceShape.Sphere:
                     using (new Handles.DrawingScope(Matrix4x4.TRS(transform.position, transform.rotation, Vector3.one)))
@@ -103,13 +103,15 @@ public static void DrawHandles_EditInfluenceNormal(SerializedInfluenceVolume ser
             }
         }
 
-        static void DrawBoxHandle(SerializedInfluenceVolume serialized, Editor owner, Transform transform, HierarchicalBox box)
+        static void DrawBoxHandle(SerializedInfluenceVolume serialized, Editor owner, Transform transform, HierarchicalBox box, SerializedProperty proxyCapturePositionProxySpace)
         {
             using (new Handles.DrawingScope(Matrix4x4.TRS(Vector3.zero, transform.rotation, Vector3.one)))
             {
                 box.center = Quaternion.Inverse(transform.rotation) * transform.position;
                 box.size = serialized.boxSize.vector3Value;
 
+                Vector3 proxyCapturePositionWS = transform.position + (transform.rotation * proxyCapturePositionProxySpace.vector3Value);
+
                 EditorGUI.BeginChangeCheck();
                 box.DrawHull(true);
                 box.DrawHandle();
@@ -119,6 +121,8 @@ static void DrawBoxHandle(SerializedInfluenceVolume serialized, Editor owner, Tr
                     Undo.RecordObject(transform, "Moving Influence");
                     transform.position = newPosition;
 
+                    proxyCapturePositionProxySpace.vector3Value = Vector3.Max(serialized.boxSize.vector3Value * -0.5f, Vector3.Min(serialized.boxSize.vector3Value * 0.5f, Quaternion.Inverse(transform.rotation) * (proxyCapturePositionWS - transform.position)));
+
                     // Clamp blend distances
                     var blendPositive = serialized.boxBlendDistancePositive.vector3Value;
                     var blendNegative = serialized.boxBlendDistanceNegative.vector3Value;