#32: Box cutout.

Assets/Editor/VolumeRendererEditorFunctions.cs

@@ -80,5 +80,13 @@ namespace UnityVolumeRendering
                 Debug.LogError("Directory doesn't exist: " + dir);
             }
         }
+
+        [MenuItem("Volume Rendering/Box cutout")]
+        static void SpawnCutoutBox()
+        {
+            VolumeRenderedObject[] objects = GameObject.FindObjectsOfType<VolumeRenderedObject>();
+            if (objects.Length == 1)
+                VolumeObjectFactory.SpawnCutoutBox(objects[0]);
+        }
     }
 }

Assets/Materials/CrossSectionPlaneMat.mat

@@ -8,8 +8,8 @@ Material:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: CrossSectionPlaneMat
-  m_Shader: {fileID: 46, guid: 0000000000000000f000000000000000, type: 0}
+  m_Shader: {fileID: 4800000, guid: be13da9a7b1929348b18627a539ef497, type: 3}
-  m_ShaderKeywords: 
+  m_ShaderKeywords: SLICEPLANE_ON _ALPHAPREMULTIPLY_ON
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0
@@ -40,7 +40,7 @@ Material:
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     - _MainTex:
-        m_Texture: {fileID: 0}
+        m_Texture: {fileID: 2800000, guid: dd8e5417cf6e38d40b0c31c547f985ac, type: 3}
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     - _MetallicGlossMap:
@@ -59,19 +59,19 @@ Material:
     - _BumpScale: 1
     - _Cutoff: 0.5
     - _DetailNormalMapScale: 1
-    - _DstBlend: 0
+    - _DstBlend: 10
     - _GlossMapScale: 1
     - _Glossiness: 0.5
     - _GlossyReflections: 1
     - _Metallic: 0
-    - _Mode: 0
+    - _Mode: 3
     - _OcclusionStrength: 1
     - _Parallax: 0.02
     - _SmoothnessTextureChannel: 0
     - _SpecularHighlights: 1
     - _SrcBlend: 1
     - _UVSec: 0
-    - _ZWrite: 1
+    - _ZWrite: 0
     m_Colors:
-    - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _Color: {r: 0.9150943, g: 0.07338022, b: 0.07338022, a: 1}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}

Assets/Resources/CrossSectionPlane.prefab

@@ -11,7 +11,6 @@ GameObject:
   - component: {fileID: 3122546165893029993}
   - component: {fileID: 7621817265638011433}
   - component: {fileID: 4756273696276402491}
-  - component: {fileID: 4727509710722438312}
   - component: {fileID: 2049453483492477609}
   m_Layer: 0
   m_Name: CrossSectionPlane
@@ -81,20 +80,6 @@ MeshRenderer:
   m_SortingLayerID: 0
   m_SortingLayer: 0
   m_SortingOrder: 0
---- !u!64 &4727509710722438312
-MeshCollider:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 5697153076470531463}
-  m_Material: {fileID: 0}
-  m_IsTrigger: 0
-  m_Enabled: 1
-  serializedVersion: 4
-  m_Convex: 0
-  m_CookingOptions: 30
-  m_Mesh: {fileID: 10210, guid: 0000000000000000e000000000000000, type: 0}
 --- !u!114 &2049453483492477609
 MonoBehaviour:
   m_ObjectHideFlags: 0

Assets/Resources/CutoutBox.prefab

@@ -0,0 +1,96 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!1 &3923763609855477888
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 6395997655089519251}
+  - component: {fileID: 4693973390399920385}
+  - component: {fileID: 486768037272836538}
+  - component: {fileID: 9069229388242967652}
+  m_Layer: 0
+  m_Name: CutoutBox
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &6395997655089519251
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 3923763609855477888}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0.05694554, y: -0.02139771, z: -0.022755325}
+  m_LocalScale: {x: 0.3, y: 0.3, z: 0.3}
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_RootOrder: 0
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!33 &4693973390399920385
+MeshFilter:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 3923763609855477888}
+  m_Mesh: {fileID: 10202, guid: 0000000000000000e000000000000000, type: 0}
+--- !u!23 &486768037272836538
+MeshRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 3923763609855477888}
+  m_Enabled: 1
+  m_CastShadows: 1
+  m_ReceiveShadows: 1
+  m_DynamicOccludee: 1
+  m_MotionVectors: 1
+  m_LightProbeUsage: 1
+  m_ReflectionProbeUsage: 1
+  m_RayTracingMode: 2
+  m_RenderingLayerMask: 1
+  m_RendererPriority: 0
+  m_Materials:
+  - {fileID: 2100000, guid: 6e564749dcca6944ca78723ffd119eca, type: 2}
+  m_StaticBatchInfo:
+    firstSubMesh: 0
+    subMeshCount: 0
+  m_StaticBatchRoot: {fileID: 0}
+  m_ProbeAnchor: {fileID: 0}
+  m_LightProbeVolumeOverride: {fileID: 0}
+  m_ScaleInLightmap: 1
+  m_ReceiveGI: 1
+  m_PreserveUVs: 0
+  m_IgnoreNormalsForChartDetection: 0
+  m_ImportantGI: 0
+  m_StitchLightmapSeams: 1
+  m_SelectedEditorRenderState: 3
+  m_MinimumChartSize: 4
+  m_AutoUVMaxDistance: 0.5
+  m_AutoUVMaxAngle: 89
+  m_LightmapParameters: {fileID: 0}
+  m_SortingLayerID: 0
+  m_SortingLayer: 0
+  m_SortingOrder: 0
+--- !u!114 &9069229388242967652
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 3923763609855477888}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 7401967f0dd72374ea6df35ee454fb53, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  targetObject: {fileID: 0}
+  cutoutType: 0

Assets/Resources/CutoutBox.prefab.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: cc908a3bf1d415e4c9e3b478efe32102
+PrefabImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/VolumeObject/CrossSectionPlane.cs

@@ -17,7 +17,7 @@ namespace UnityVolumeRendering
         private void OnDisable()
         {
             if (targetObject != null)
-                targetObject.meshRenderer.sharedMaterial.DisableKeyword("SLICEPLANE_ON");
+                targetObject.meshRenderer.sharedMaterial.DisableKeyword("CUTOUT_PLANE");
         }
 
         private void Update()
@@ -27,7 +27,7 @@ namespace UnityVolumeRendering
 
             Material mat = targetObject.meshRenderer.sharedMaterial;
 
-            mat.EnableKeyword("SLICEPLANE_ON");
+            mat.EnableKeyword("CUTOUT_PLANE");
             mat.SetMatrix("_CrossSectionMatrix", transform.worldToLocalMatrix * targetObject.transform.localToWorldMatrix);
         }
     }

Assets/Scripts/VolumeObject/CutoutBox.cs

@@ -0,0 +1,45 @@
+using UnityEngine;
+
+namespace UnityVolumeRendering
+{
+    public enum CutoutType
+    {
+        Inclusive, Exclusive
+    }
+
+    /// <summary>
+    /// Cutout box.
+    /// Used for cutting a model (cutout view).
+    /// </summary>
+    [ExecuteInEditMode]
+    public class CutoutBox : MonoBehaviour
+    {
+        /// <summary>
+        /// Volume dataset to cut.
+        /// </summary>
+        public VolumeRenderedObject targetObject;
+
+        public CutoutType cutoutType = CutoutType.Exclusive;
+
+        private void OnDisable()
+        {
+            if (targetObject != null)
+            {
+                targetObject.meshRenderer.sharedMaterial.DisableKeyword("CUTOUT_BOX_INCL");
+                targetObject.meshRenderer.sharedMaterial.DisableKeyword("CUTOUT_BOX_EXCL");
+            }
+        }
+
+        private void Update()
+        {
+            if (targetObject == null)
+                return;
+
+            Material mat = targetObject.meshRenderer.sharedMaterial;
+
+            mat.DisableKeyword(cutoutType == CutoutType.Inclusive ? "CUTOUT_BOX_EXCL" : "CUTOUT_BOX_INCL");
+            mat.EnableKeyword(cutoutType == CutoutType.Exclusive ? "CUTOUT_BOX_EXCL" : "CUTOUT_BOX_INCL");
+            mat.SetMatrix("_CrossSectionMatrix", transform.worldToLocalMatrix * targetObject.transform.localToWorldMatrix);
+        }
+    }
+}

Assets/Scripts/VolumeObject/CutoutBox.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7401967f0dd72374ea6df35ee454fb53
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/VolumeObject/VolumeObjectFactory.cs

@@ -61,6 +61,19 @@ namespace UnityVolumeRendering
 
 #if UNITY_EDITOR
             UnityEditor.Selection.objects = new UnityEngine.Object[] { quad };
+#endif
+        }
+
+        public static void SpawnCutoutBox(VolumeRenderedObject volobj)
+        {
+            GameObject obj = GameObject.Instantiate((GameObject)Resources.Load("CutoutBox"));
+            obj.transform.rotation = Quaternion.Euler(270.0f, 0.0f, 0.0f);
+            CutoutBox cbox = obj.gameObject.GetComponent<CutoutBox>();
+            cbox.targetObject = volobj;
+            obj.transform.position = volobj.transform.position;
+
+#if UNITY_EDITOR
+            UnityEditor.Selection.objects = new UnityEngine.Object[] { obj };
 #endif
         }
     }

Assets/Shaders/DirectVolumeRenderingShader.shader

@@ -23,7 +23,7 @@
             CGPROGRAM
             #pragma multi_compile MODE_DVR MODE_MIP MODE_SURF
             #pragma multi_compile __ TF2D_ON
-            #pragma multi_compile __ SLICEPLANE_ON
+            #pragma multi_compile __ CUTOUT_PLANE CUTOUT_BOX_INCL CUTOUT_BOX_EXCL
             #pragma multi_compile __ LIGHTING_ON
             #pragma multi_compile DEPTHWRITE_ON DEPTHWRITE_OFF
             #pragma vertex vert
@@ -31,6 +31,8 @@
 
             #include "UnityCG.cginc"
 
+            #define CUTOUT_ON CUTOUT_PLANE || CUTOUT_BOX_INCL || CUTOUT_BOX_EXCL
+
             struct vert_in
             {
                 float4 vertex : POSITION;
@@ -62,7 +64,7 @@
             float _MinVal;
             float _MaxVal;
 
-#if SLICEPLANE_ON
+#if CUTOUT_ON
             float4x4 _CrossSectionMatrix;
 #endif
 
@@ -114,15 +116,22 @@
 #endif
             }
 
-            bool isSliceCulled(float3 currPos)
+            bool IsCutout(float3 currPos)
             {
-#if SLICEPLANE_ON
+#if CUTOUT_ON
                 // Move the reference in the middle of the mesh, like the pivot
                 float3 pos = currPos - float3(0.5f, 0.5f, 0.5f);
 
                 // Convert from model space to plane's vector space
                 float3 planeSpacePos = mul(_CrossSectionMatrix, float4(pos, 1.0f));
+                
+    #if CUTOUT_PLANE
                 return planeSpacePos.z > 0.0f;
+    #elif CUTOUT_BOX_INCL
+                return !(planeSpacePos.x >= -0.5f && planeSpacePos.x <= 0.5f && planeSpacePos.y >= -0.5f && planeSpacePos.y <= 0.5f && planeSpacePos.z >= -0.5f && planeSpacePos.z <= 0.5f);
+    #elif CUTOUT_BOX_EXCL
+                return planeSpacePos.x >= -0.5f && planeSpacePos.x <= 0.5f && planeSpacePos.y >= -0.5f && planeSpacePos.y <= 0.5f && planeSpacePos.z >= -0.5f && planeSpacePos.z <= 0.5f;
+    #endif
 #else
                 return false;
 #endif
@@ -163,8 +172,8 @@
                         break;
 
                     // Perform slice culling (cross section plane)
-#ifdef SLICEPLANE_ON
+#ifdef CUTOUT_ON
-                    if(isSliceCulled(currPos))
+                    if(IsCutout(currPos))
                     	continue;
 #endif
 
@@ -233,8 +242,8 @@
                     if (currPos.x < -0.0001f || currPos.x >= 1.0001f || currPos.y < -0.0001f || currPos.y > 1.0001f || currPos.z < -0.0001f || currPos.z > 1.0001f) // TODO: avoid branch?
                         break;
 
-#ifdef SLICEPLANE_ON
+#ifdef CUTOUT_ON
-                    if (isSliceCulled(currPos))
+                    if (IsCutout(currPos))
                         continue;
 #endif
 
@@ -277,8 +286,8 @@
                     if (currPos.x < 0.0f || currPos.x >= 1.0f || currPos.y < 0.0f || currPos.y > 1.0f || currPos.z < 0.0f || currPos.z > 1.0f) // TODO: avoid branch?
                         continue;
 
-#ifdef SLICEPLANE_ON
+#ifdef CUTOUT_ON
-                    if (isSliceCulled(currPos))
+                    if (IsCutout(currPos))
                         continue;
 #endif