Implement TglImpl::MeshBuilder::CreateMesh (#635)

* WIP

* Change

* Fix

* Improve match

* Rename class

* Fix function

* Fix annotation

* Fix annotations

* Fix annotation

CMakeLists.txt

@@ -94,9 +94,9 @@ add_library(tglrl STATIC
   LEGO1/tgl/d3drm/group.cpp
   LEGO1/tgl/d3drm/light.cpp
   LEGO1/tgl/d3drm/mesh.cpp
+  LEGO1/tgl/d3drm/meshbuilder.cpp
   LEGO1/tgl/d3drm/renderer.cpp
   LEGO1/tgl/d3drm/texture.cpp
-  LEGO1/tgl/d3drm/unk.cpp
   LEGO1/tgl/d3drm/view.cpp
 )
 register_lego1_target(tglrl)

LEGO1/lego/sources/roi/legolod.cpp

@@ -72,7 +72,7 @@ LegoResult LegoLOD::Read(Tgl::Renderer* p_renderer, LegoTextureContainer* p_text
 		return SUCCESS;
 	}
 
-	m_unk0x04 = p_renderer->CreateUnk();
+	m_meshBuilder = p_renderer->CreateMeshBuilder();
 
 	if (p_storage->Read(&m_numMeshes, sizeof(m_numMeshes)) != SUCCESS) {
 		goto done;
@@ -188,7 +188,7 @@ LegoResult LegoLOD::Read(Tgl::Renderer* p_renderer, LegoTextureContainer* p_text
 			meshUnd2++;
 		}
 
-		m_meshes[meshIndex].m_tglMesh = m_unk0x04->CreateMesh(
+		m_meshes[meshIndex].m_tglMesh = m_meshBuilder->CreateMesh(
 			numPolys & MAXWORD,
 			numVertices & MAXWORD,
 			vertices,

LEGO1/tgl/d3drm/group.cpp

@@ -94,11 +94,10 @@ Result GroupImpl::Add(const Mesh* pMesh)
 }
 
 // FUNCTION: LEGO1 0x100a3450
-Result GroupImpl::Remove(const Unk* pUnk)
+Result GroupImpl::Remove(const MeshBuilder* pMeshBuilder)
 {
-	const UnkImpl* pUnkImpl = static_cast<const UnkImpl*>(pUnk);
+	const MeshBuilderImpl* pMeshBuilderImpl = static_cast<const MeshBuilderImpl*>(pMeshBuilder);
-	// TODO: Incorrect structure
+	return ResultVal(m_data->DeleteVisual(pMeshBuilderImpl->ImplementationData()));
-	return ResultVal(m_data->DeleteVisual((IDirect3DRMMesh*) pUnkImpl->ImplementationData()));
 }
 
 // FUNCTION: LEGO1 0x100a3480

LEGO1/tgl/d3drm/impl.h

@@ -34,7 +34,7 @@ class CameraImpl;
 class GroupImpl;
 class MeshImpl;
 class TextureImpl;
-class UnkImpl;
+class MeshBuilderImpl;
 
 // VTABLE: LEGO1 0x100db910
 class RendererImpl : public Renderer {
@@ -62,7 +62,7 @@ public:
 	Group* CreateGroup(const Group* pParent) override;
 
 	// vtable+0x20
-	Unk* CreateUnk() override;
+	MeshBuilder* CreateMeshBuilder() override;
 	Texture* CreateTexture(
 		int width,
 		int height,
@@ -273,24 +273,27 @@ public:
 
 	// vtable+0x10
 	Result GetTexture(Texture*&) override;
-	Result SetTextureMappingMode(ProjectionType) override;
+	Result SetTextureMappingMode(TextureMappingMode) override;
 	Result SetShadingModel(ShadingModel) override;
-	Mesh* DeepClone(Unk*) override;
+	Mesh* DeepClone(MeshBuilder*) override;
 
 	// vtable+0x20
-	Mesh* ShallowClone(Unk*) override;
+	Mesh* ShallowClone(MeshBuilder*) override;
 
 	struct MeshData {
 		IDirect3DRMMesh* groupMesh;
 		D3DRMGROUPINDEX groupIndex;
 	};
 
-	inline MeshData* ImplementationData() const { return m_data; }
+	typedef MeshData* MeshDataType;
+
+	inline const MeshDataType& ImplementationData() const { return m_data; }
+	inline MeshDataType& ImplementationData() { return m_data; }
 
 	friend class RendererImpl;
 
 private:
-	MeshData* m_data;
+	MeshDataType m_data;
 };
 
 // VTABLE: LEGO1 0x100dba68
@@ -320,7 +323,7 @@ public:
 	// vtable+0x20
 	Result Add(const Mesh*) override;
 	Result Remove(const Group*) override;
-	Result Remove(const Unk*) override;
+	Result Remove(const MeshBuilder*) override;
 	Result RemoveAll() override;
 
 	// vtable+0x30
@@ -335,10 +338,10 @@ private:
 };
 
 // VTABLE: LEGO1 0x100dbb18
-class UnkImpl : public Unk {
+class MeshBuilderImpl : public MeshBuilder {
 public:
-	UnkImpl() : m_data(0) {}
+	MeshBuilderImpl() : m_data(0) {}
-	~UnkImpl() override
+	~MeshBuilderImpl() override
 	{
 		if (m_data) {
 			m_data->Release();
@@ -349,7 +352,7 @@ public:
 	void* ImplementationDataPtr() override;
 
 	// vtable+0x08
-	Tgl::Mesh* CreateMesh(
+	Mesh* CreateMesh(
 		unsigned long faceCount,
 		unsigned long vertexCount,
 		float (*pPositions)[3],
@@ -357,18 +360,30 @@ public:
 		float (*pTextureCoordinates)[2],
 		unsigned long (*pFaceIndices)[3],
 		unsigned long (*pTextureIndices)[3],
-		Tgl::ShadingModel shadingModel
+		ShadingModel shadingModel
 	) override;
 	Result GetBoundingBox(float min[3], float max[3]) override;
 
 	// vtable+0x10
-	Unk* Clone() override;
+	MeshBuilder* Clone() override;
 
 	inline IDirect3DRMMesh* ImplementationData() const { return m_data; }
 
 	friend class RendererImpl;
 
 private:
+	inline Result CreateMeshImpl(
+		MeshImpl* pMeshImpl,
+		unsigned long faceCount,
+		unsigned long vertexCount,
+		float (*pPositions)[3],
+		float (*pNormals)[3],
+		float (*pTextureCoordinates)[2],
+		unsigned long (*pFaceIndices)[3],
+		unsigned long (*pTextureIndices)[3],
+		ShadingModel shadingModel
+	);
+
 	IDirect3DRMMesh* m_data;
 };
 
@@ -514,7 +529,7 @@ inline D3DRMMATRIX4D* Translate(FloatMatrix4& tglMatrix4x4, D3DRMMATRIX4D& rD3DR
 // TglImpl::LightImpl::`scalar deleting destructor'
 
 // SYNTHETIC: LEGO1 0x100a2720
-// TglImpl::UnkImpl::`scalar deleting destructor'
+// TglImpl::MeshBuilderImpl::`scalar deleting destructor'
 
 // SYNTHETIC: LEGO1 0x100a2800
 // TglImpl::TextureImpl::`scalar deleting destructor'

LEGO1/tgl/d3drm/mesh.cpp

@@ -38,9 +38,9 @@ Result MeshImpl::SetTexture(const Texture* pTexture)
 }
 
 // FUNCTION: LEGO1 0x100a3f80
-Result MeshImpl::SetTextureMappingMode(ProjectionType projType)
+Result MeshImpl::SetTextureMappingMode(TextureMappingMode mode)
 {
-	if (projType == Perspective) {
+	if (mode == PerspectiveCorrect) {
 		return ResultVal(m_data->groupMesh->SetGroupMapping(m_data->groupIndex, D3DRMMAP_PERSPCORRECT));
 	}
 	else {
@@ -73,7 +73,7 @@ Result MeshImpl::SetShadingModel(ShadingModel model)
 }
 
 // FUNCTION: LEGO1 0x100a4030
-Mesh* MeshImpl::DeepClone(Unk* pUnk)
+Mesh* MeshImpl::DeepClone(MeshBuilder* pMeshBuilder)
 {
 	// Create group
 	MeshImpl* newMesh = new MeshImpl();
@@ -96,7 +96,7 @@ Mesh* MeshImpl::DeepClone(Unk* pUnk)
 	D3DCOLOR color = m_data->groupMesh->GetGroupColor(m_data->groupIndex);
 
 	// Push information to new group
-	UnkImpl* target = static_cast<UnkImpl*>(pUnk);
+	MeshBuilderImpl* target = static_cast<MeshBuilderImpl*>(pMeshBuilder);
 	D3DRMGROUPINDEX index;
 	target->ImplementationData()->AddGroup(vcount, fcount, vperface, faceBuffer, &index);
 	newMesh->m_data->groupIndex = index;
@@ -118,14 +118,14 @@ Mesh* MeshImpl::DeepClone(Unk* pUnk)
 }
 
 // FUNCTION: LEGO1 0x100a4240
-Mesh* MeshImpl::ShallowClone(Unk* pUnk)
+Mesh* MeshImpl::ShallowClone(MeshBuilder* pMeshBuilder)
 {
 	MeshImpl* newGroup = new MeshImpl();
 	MeshData* newData = new MeshData();
 	newGroup->m_data = newData;
 	if (newData) {
 		newData->groupIndex = m_data->groupIndex;
-		newData->groupMesh = static_cast<UnkImpl*>(pUnk)->ImplementationData();
+		newData->groupMesh = static_cast<MeshBuilderImpl*>(pMeshBuilder)->ImplementationData();
 	}
 	else {
 		delete newGroup;

LEGO1/tgl/d3drm/meshbuilder.cpp

@@ -0,0 +1,187 @@
+#include "impl.h"
+
+using namespace TglImpl;
+
+DECOMP_SIZE_ASSERT(MeshBuilder, 0x04);
+DECOMP_SIZE_ASSERT(MeshBuilderImpl, 0x08);
+
+// FUNCTION: LEGO1 0x100a3830
+void* MeshBuilderImpl::ImplementationDataPtr()
+{
+	return reinterpret_cast<void*>(&m_data);
+}
+
+// FUNCTION: LEGO1 0x100a3840
+Mesh* MeshBuilderImpl::CreateMesh(
+	unsigned long faceCount,
+	unsigned long vertexCount,
+	float (*pPositions)[3],
+	float (*pNormals)[3],
+	float (*pTextureCoordinates)[2],
+	unsigned long (*pFaceIndices)[3],
+	unsigned long (*pTextureIndices)[3],
+	ShadingModel shadingModel
+)
+{
+	MeshImpl* pMeshImpl = new MeshImpl;
+	if (CreateMeshImpl(
+			pMeshImpl,
+			faceCount,
+			vertexCount,
+			pPositions,
+			pNormals,
+			pTextureCoordinates,
+			pFaceIndices,
+			pTextureIndices,
+			shadingModel
+		) == Error) {
+		delete pMeshImpl;
+		pMeshImpl = NULL;
+	}
+
+	return pMeshImpl;
+}
+
+inline Result MeshSetTextureMappingMode(MeshImpl::MeshData* pMesh, TextureMappingMode mode)
+{
+	if (mode == PerspectiveCorrect) {
+		return ResultVal(pMesh->groupMesh->SetGroupMapping(pMesh->groupIndex, D3DRMMAP_PERSPCORRECT));
+	}
+	else {
+		return ResultVal(pMesh->groupMesh->SetGroupMapping(pMesh->groupIndex, 0));
+	}
+}
+
+inline Result CreateMesh(
+	IDirect3DRMMesh* pD3DRM,
+	unsigned long faceCount,
+	unsigned long vertexCount,
+	float (*pPositions)[3],
+	float (*pNormals)[3],
+	float (*pTextureCoordinates)[2],
+	unsigned long (*pFaceIndices)[3],
+	unsigned long (*pTextureIndices)[3],
+	ShadingModel shadingModel,
+	MeshImpl::MeshDataType& rpMesh
+)
+{
+	unsigned long* faceIndices = (unsigned long*) pFaceIndices;
+	D3DRMGROUPINDEX groupIndex = 0;
+	int count = faceCount * 3;
+	int index = 0;
+
+	unsigned int* fData = new unsigned int[count];
+
+	D3DRMVERTEX* vertices = new D3DRMVERTEX[vertexCount];
+	memset(vertices, 0, sizeof(*vertices) * vertexCount);
+
+	rpMesh = new MeshImpl::MeshData;
+	rpMesh->groupMesh = pD3DRM;
+
+	for (int i = 0; i < count; i++) {
+		if ((*((unsigned short*) &faceIndices[i] + 1) >> 0x0f) & 0x01) {
+			unsigned long j = *(unsigned short*) &faceIndices[i];
+			vertices[index].position.x = pPositions[j][0];
+			vertices[index].position.y = pPositions[j][1];
+			vertices[index].position.z = pPositions[j][2];
+			j = *((unsigned short*) &faceIndices[i] + 1) & MAXSHORT;
+			vertices[index].normal.x = pNormals[j][0];
+			vertices[index].normal.y = pNormals[j][1];
+			vertices[index].normal.z = pNormals[j][2];
+
+			if (pTextureIndices != NULL && pTextureCoordinates != NULL) {
+				j = ((unsigned long*) pTextureIndices)[i];
+				vertices[index].tu = pTextureCoordinates[j][0];
+				vertices[index].tv = pTextureCoordinates[j][1];
+			}
+
+			fData[i] = index;
+			index++;
+		}
+		else {
+			fData[i] = *(unsigned short*) &faceIndices[i];
+		}
+	}
+
+	Result result;
+	result = ResultVal(pD3DRM->AddGroup(vertexCount, faceCount, 3, fData, &groupIndex));
+
+	if (Succeeded(result)) {
+		rpMesh->groupIndex = groupIndex;
+		result = ResultVal(pD3DRM->SetVertices(groupIndex, 0, vertexCount, vertices));
+	}
+
+	if (!Succeeded(result)) {
+		if (rpMesh) {
+			delete rpMesh;
+		}
+		rpMesh = NULL;
+	}
+	else {
+		result = MeshSetTextureMappingMode(rpMesh, PerspectiveCorrect);
+	}
+
+	if (fData != NULL) {
+		delete[] fData;
+	}
+
+	if (vertices != NULL) {
+		delete[] vertices;
+	}
+
+	return result;
+}
+
+inline Result MeshBuilderImpl::CreateMeshImpl(
+	MeshImpl* pMeshImpl,
+	unsigned long faceCount,
+	unsigned long vertexCount,
+	float (*pPositions)[3],
+	float (*pNormals)[3],
+	float (*pTextureCoordinates)[2],
+	unsigned long (*pFaceIndices)[3],
+	unsigned long (*pTextureIndices)[3],
+	ShadingModel shadingModel
+)
+{
+	return ::CreateMesh(
+		m_data,
+		faceCount,
+		vertexCount,
+		pPositions,
+		pNormals,
+		pTextureCoordinates,
+		pFaceIndices,
+		pTextureIndices,
+		shadingModel,
+		pMeshImpl->ImplementationData()
+	);
+}
+
+// FUNCTION: LEGO1 0x100a3ae0
+Result MeshBuilderImpl::GetBoundingBox(float min[3], float max[3])
+{
+	D3DRMBOX box;
+	Result result = ResultVal(m_data->GetBox(&box));
+	if (result == Success) {
+		min[0] = box.min.x;
+		min[1] = box.min.y;
+		min[2] = box.min.z;
+		max[0] = box.max.x;
+		max[1] = box.max.y;
+		max[2] = box.max.z;
+	}
+	return result;
+}
+
+// FUNCTION: LEGO1 0x100a3b40
+MeshBuilder* MeshBuilderImpl::Clone()
+{
+	MeshBuilderImpl* mesh = new MeshBuilderImpl();
+	int ret = m_data->Clone(0, IID_IDirect3DRMMeshBuilder, (void**) &mesh->m_data);
+	if (ret < 0) {
+		delete mesh;
+		mesh = NULL;
+	}
+	return mesh;
+}

LEGO1/tgl/d3drm/renderer.cpp

@@ -209,20 +209,14 @@ Light* RendererImpl::CreateLight(LightType type, float r, float g, float b)
 }
 
 // FUNCTION: LEGO1 0x100a1e90
-Unk* RendererImpl::CreateUnk()
+MeshBuilder* RendererImpl::CreateMeshBuilder()
 {
-	// Note: I'm fairly certain that Unknown is not what Tgl calls a
+	MeshBuilderImpl* meshBuilder = new MeshBuilderImpl();
-	// "Mesh", because the methods on Mesh in the Tgl leak line up much
+	if (FAILED(m_data->CreateMesh(&meshBuilder->m_data))) {
-	// more closely with a different vtable than the one assigned in
+		delete meshBuilder;
-	// this method (meaning this method is not creating a Mesh).
+		meshBuilder = NULL;
-	// Maybe this method is something like CreateMeshBuilder where the
-	// Mesh data type in the Tgl leak was split into builder/result?
-	UnkImpl* unknown = new UnkImpl();
-	if (FAILED(m_data->CreateMesh(&unknown->m_data))) {
-		delete unknown;
-		unknown = NULL;
 	}
-	return unknown;
+	return meshBuilder;
 }
 
 inline Result RendererCreateTexture(

LEGO1/tgl/d3drm/unk.cpp

@@ -1,55 +0,0 @@
-#include "impl.h"
-
-using namespace TglImpl;
-
-DECOMP_SIZE_ASSERT(Unk, 0x04);
-DECOMP_SIZE_ASSERT(UnkImpl, 0x08);
-
-// FUNCTION: LEGO1 0x100a3830
-void* UnkImpl::ImplementationDataPtr()
-{
-	return reinterpret_cast<void*>(&m_data);
-}
-
-// STUB: LEGO1 0x100a3840
-Tgl::Mesh* UnkImpl::CreateMesh(
-	unsigned long faceCount,
-	unsigned long vertexCount,
-	float (*pPositions)[3],
-	float (*pNormals)[3],
-	float (*pTextureCoordinates)[2],
-	unsigned long (*pFaceIndices)[3],
-	unsigned long (*pTextureIndices)[3],
-	Tgl::ShadingModel shadingModel
-)
-{
-	return NULL;
-}
-
-// FUNCTION: LEGO1 0x100a3ae0
-Result UnkImpl::GetBoundingBox(float min[3], float max[3])
-{
-	D3DRMBOX box;
-	Result result = ResultVal(m_data->GetBox(&box));
-	if (result == Success) {
-		min[0] = box.min.x;
-		min[1] = box.min.y;
-		min[2] = box.min.z;
-		max[0] = box.max.x;
-		max[1] = box.max.y;
-		max[2] = box.max.z;
-	}
-	return result;
-}
-
-// FUNCTION: LEGO1 0x100a3b40
-Unk* UnkImpl::Clone()
-{
-	UnkImpl* mesh = new UnkImpl();
-	int ret = m_data->Clone(0, IID_IDirect3DRMMeshBuilder, (void**) &mesh->m_data);
-	if (ret < 0) {
-		delete mesh;
-		mesh = NULL;
-	}
-	return mesh;
-}

LEGO1/tgl/tgl.h

@@ -96,7 +96,7 @@ class Camera;
 class Group;
 class Mesh;
 class Texture;
-class Unk;
+class MeshBuilder;
 
 // VTABLE: LEGO1 0x100db980
 class Object {
@@ -131,7 +131,7 @@ public:
 	virtual Group* CreateGroup(const Group* pParent = 0) = 0;
 
 	// vtable+0x20
-	virtual Unk* CreateUnk() = 0;
+	virtual MeshBuilder* CreateMeshBuilder() = 0;
 	virtual Texture* CreateTexture(
 		int width,
 		int height,
@@ -269,18 +269,21 @@ public:
 // VTABLE: LEGO1 0x100dbbb0
 class Mesh : public Object {
 public:
+	// SYNTHETIC: LEGO1 0x100a3e10
+	// Tgl::Mesh::~Mesh
+
 	virtual Result SetColor(float r, float g, float b, float a) = 0;
 	virtual Result SetTexture(const Texture*) = 0;
 	virtual Result GetTexture(Texture*&) = 0;
 
-	virtual Result SetTextureMappingMode(ProjectionType) = 0;
+	virtual Result SetTextureMappingMode(TextureMappingMode) = 0;
 	virtual Result SetShadingModel(ShadingModel) = 0;
 
 	// Clone data in underlying group
-	virtual Mesh* DeepClone(Unk*) = 0;
+	virtual Mesh* DeepClone(MeshBuilder*) = 0;
 
 	// Just get another Group pointing to the same underlying data
-	virtual Mesh* ShallowClone(Unk*) = 0;
+	virtual Mesh* ShallowClone(MeshBuilder*) = 0;
 
 	// SYNTHETIC: LEGO1 0x100a3e60
 	// Tgl::Mesh::`scalar deleting destructor'
@@ -297,7 +300,7 @@ public:
 	virtual Result Add(const Group*) = 0;
 	virtual Result Add(const Mesh*) = 0;
 	virtual Result Remove(const Group*) = 0;
-	virtual Result Remove(const Unk*) = 0;
+	virtual Result Remove(const MeshBuilder*) = 0;
 	virtual Result RemoveAll() = 0;
 
 	// This is TransformLocalToWorld in the leak, however it seems
@@ -315,9 +318,9 @@ public:
 // was not in the leaked Tgl code. My suspicion is that it's
 // some kind of builder class for creating meshes.
 // VTABLE: LEGO1 0x100dbb30
-class Unk : public Object {
+class MeshBuilder : public Object {
 public:
-	virtual Tgl::Mesh* CreateMesh(
+	virtual Mesh* CreateMesh(
 		unsigned long faceCount,
 		unsigned long vertexCount,
 		float (*pPositions)[3],
@@ -325,16 +328,16 @@ public:
 		float (*pTextureCoordinates)[2],
 		unsigned long (*pFaceIndices)[3],
 		unsigned long (*pTextureIndices)[3],
-		Tgl::ShadingModel shadingModel
+		ShadingModel shadingModel
 	) = 0;
 	virtual Result GetBoundingBox(float min[3], float max[3]) = 0;
-	virtual Unk* Clone() = 0;
+	virtual MeshBuilder* Clone() = 0;
 
 	// SYNTHETIC: LEGO1 0x100a27b0
-	// Tgl::Unk::~Unk
+	// Tgl::MeshBuilder::~MeshBuilder
 
 	// SYNTHETIC: LEGO1 0x100a2b10
-	// Tgl::Unk::`scalar deleting destructor'
+	// Tgl::MeshBuilder::`scalar deleting destructor'
 };
 
 // VTABLE: LEGO1 0x100dbb68

LEGO1/viewmanager/viewlod.cpp

@@ -3,5 +3,5 @@
 // FUNCTION: LEGO1 0x100a5e40
 ViewLOD::~ViewLOD()
 {
-	delete m_unk0x04;
+	delete m_meshBuilder;
 }

LEGO1/viewmanager/viewlod.h

@@ -17,7 +17,7 @@ public:
 		c_bit4 = 0x10
 	};
 
-	ViewLOD(Tgl::Renderer* pRenderer) : m_unk0x04(NULL), m_unk0x08(3) {}
+	ViewLOD(Tgl::Renderer* pRenderer) : m_meshBuilder(NULL), m_unk0x08(3) {}
 	~ViewLOD() override;
 
 	// FUNCTION: LEGO1 0x100a6f30
@@ -26,8 +26,8 @@ public:
 	// FUNCTION: LEGO1 0x100a6f50
 	int NVerts() const override { return NumPolys() * 2; } // vtable+0x08
 
-	Tgl::Unk* GetUnknown0x04() { return m_unk0x04; }
+	Tgl::MeshBuilder* GetMeshBuilder() { return m_meshBuilder; }
-	const Tgl::Unk* GetUnknown0x04() const { return m_unk0x04; }
+	const Tgl::MeshBuilder* GetMeshBuilder() const { return m_meshBuilder; }
 	unsigned char GetUnknown0x08Test4() { return m_unk0x08 & 0xffffff04; }
 	unsigned char GetUnknown0x08Test8() { return m_unk0x08 & 0xffffff08; }
 
@@ -38,7 +38,7 @@ public:
 	// ViewLOD::`scalar deleting destructor'
 
 protected:
-	Tgl::Unk* m_unk0x04;  // 0x04
+	Tgl::MeshBuilder* m_meshBuilder; // 0x04
 	undefined4 m_unk0x08;            // 0x08
 };
 

LEGO1/viewmanager/viewmanager.cpp

@@ -93,13 +93,13 @@ void ViewManager::FUN_100a66a0(ViewROI* p_roi)
 	const ViewLOD* lod = (const ViewLOD*) p_roi->GetLOD(p_roi->GetUnknown0xe0());
 
 	if (lod != NULL) {
-		const Tgl::Unk* unk = NULL;
+		const Tgl::MeshBuilder* meshBuilder = NULL;
 		Tgl::Group* roiGeometry = p_roi->GetGeometry();
 
-		unk = lod->GetUnknown0x04();
+		meshBuilder = lod->GetMeshBuilder();
 
-		if (unk != NULL) {
+		if (meshBuilder != NULL) {
-			roiGeometry->Remove(unk);
+			roiGeometry->Remove(meshBuilder);
 		}
 
 		scene->Remove(roiGeometry);