Add IMeshBufffer::clone for buffer copies, use it in CMeshManipulator::createMeshCopy

CMeshManipulator::createMeshCopy creates new meshes which have copies of the actual meshbuffers instead of copying everything into SMeshBuffers (which didn't support 32 bit or any of the other special features).



git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6335 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,5 +1,6 @@
 --------------------------
 Changes in 1.9 (not yet released)
+- Add IMeshBufffer::clone function to create buffer copies. CMeshManipulator::createMeshCopy uses that now and works now with all types of meshbuffers.
 - obj writer can now write 32 bit buffers
 - obj meshloader can now load 32 bit buffers when setPreferredIndexType is set to EIT_32BIT.
   It's 16 bit meshes use now also an IDynamicMeshbuffer instead of an SMeshBuffer.

include/CDynamicMeshBuffer.h

@@ -120,6 +120,40 @@ namespace scene
 			return EMBT_DYNAMIC;
 		}
 
+		//! Create copy of the meshbuffer
+		virtual IMeshBuffer* createClone(int cloneFlags) const IRR_OVERRIDE
+		{
+			CDynamicMeshBuffer* clone = new CDynamicMeshBuffer(VertexBuffer->getType(), IndexBuffer->getType());
+
+			if (cloneFlags & ECF_VERTICES)
+			{
+				const u32 numVertices = VertexBuffer->size();
+				clone->VertexBuffer->reallocate(numVertices);
+				for ( u32 i=0; i<numVertices; ++i )
+				{
+					clone->VertexBuffer->push_back((*VertexBuffer)[i]);
+				}
+				clone->BoundingBox = BoundingBox;
+			}
+
+			if (cloneFlags & ECF_INDICES)
+			{
+				const u32 numIndices = IndexBuffer->size();
+				clone->IndexBuffer->reallocate(numIndices);
+				for ( u32 i=0; i<numIndices; ++i )
+				{
+					clone->IndexBuffer->push_back((*IndexBuffer)[i]);
+				}
+			}
+
+			clone->VertexBuffer->setHardwareMappingHint(VertexBuffer->getHardwareMappingHint());
+			clone->IndexBuffer->setHardwareMappingHint(clone->IndexBuffer->getHardwareMappingHint());
+			clone->Material = Material;
+			clone->PrimitiveType = PrimitiveType;
+
+			return clone;
+		}
+
 		video::SMaterial Material;
 		core::aabbox3d<f32> BoundingBox;
 		//! Primitive type used for rendering (triangles, lines, ...)

include/CMeshBuffer.h

@@ -292,9 +292,33 @@ namespace scene
 			return getTypeT();
 		}
 
+		//! Create copy of the meshbuffer
+		virtual IMeshBuffer* createClone(int cloneFlags) const IRR_OVERRIDE
+		{
+			CMeshBuffer<T> * clone = new CMeshBuffer<T>();
+
+			if (cloneFlags & ECF_VERTICES)
+			{
+				clone->Vertices = Vertices;
+				clone->BoundingBox = BoundingBox;
+			}
+
+			if (cloneFlags & ECF_INDICES)
+			{
+				clone->Indices = Indices;
+			}
+
+			clone->PrimitiveType = PrimitiveType;
+			clone->Material = getMaterial();
+			clone->MappingHint_Vertex = MappingHint_Vertex;
+			clone->MappingHint_Index = MappingHint_Index;
+
+			return clone;
+		}
+
 		//! Returns type of the class implementing the IMeshBuffer for template specialization
-		// Minor note: Some compilers (VS) allow directly specializating the virtual function,
+		// Minor note: Some compilers (VS) allow directly specializing the virtual function,
-		// but this will fail on other compilers (GCC).
+		// but this will fail on other compilers (GCC). So using a helper function.
 		EMESH_BUFFER_TYPE getTypeT() const;
 
 		u32 ChangedID_Vertex;

include/IMeshBuffer.h

@@ -190,6 +190,16 @@ namespace scene
 			return EMBT_UNKNOWN;
 		}
 
+		//! Bitflags with options for cloning
+		enum ECloneFlags
+		{
+			ECF_VERTICES = 1,	//! clone the vertices (or copy pointer for SSharedMeshBuffer)
+			ECF_INDICES = 2		//! clone the indices
+		};
+
+		//! Create a new object with a copy of the meshbuffer
+		//\param cloneFlags A combination of ECloneFlags
+		virtual IMeshBuffer* createClone(int cloneFlags=ECF_VERTICES|ECF_INDICES) const = 0;
 
 	};
 

include/IMeshManipulator.h

@@ -229,9 +229,7 @@ namespace scene
 				u8 axis, const core::vector3df& offset) const=0;
 
 		//! Clones a static IMesh into a modifiable SMesh.
-		/** All meshbuffers in the returned SMesh
+		/** \param mesh Mesh to copy.
-		are of type SMeshBuffer or SMeshBufferLightMap.
-		\param mesh Mesh to copy.
 		\return Cloned mesh. If you no longer need the
 		cloned mesh, you should call SMesh::drop(). See
 		IReferenceCounted::drop() for more information. */

include/IVertexBuffer.h

@@ -18,17 +18,27 @@ namespace scene
 	class IVertexBuffer : public virtual IReferenceCounted
 	{
 	public:
+		//! Pointer to first element of vertex data
 		virtual void* getData() =0;
+
 		virtual video::E_VERTEX_TYPE getType() const =0;
 		virtual void setType(video::E_VERTEX_TYPE vertexType) =0;
+
+		//! Number of bytes per element
 		virtual u32 stride() const =0;
+
+		//! Number of elements
 		virtual u32 size() const =0;
+
+		//! Add vertex to end. Note that depending on vertex type this will be one of the types derived from video::S3DVertex.
 		virtual void push_back(const video::S3DVertex &element) =0;
 		virtual video::S3DVertex& operator [](const u32 index) const =0;
 		virtual video::S3DVertex& getLast() =0;
 		virtual void set_used(u32 usedNow) =0;
 		virtual void reallocate(u32 new_size) =0;
 		virtual u32 allocated_size() const =0;
+
+		//! Same as getData() - not sure why we got 2, should probably deprecate (and we don't always have video::S3DVertex*, so just confusing)
 		virtual video::S3DVertex* pointer() =0;
 
 		//! get the current hardware mapping hint

include/SSharedMeshBuffer.h

@@ -172,9 +172,16 @@ namespace scene
 		}
 
 		//! append the vertices and indices to the current buffer
-		virtual void append(const void* const vertices, u32 numVertices, const u16* const indices, u32 numIndices)  IRR_OVERRIDE {}
+		virtual void append(const void* const vertices, u32 numVertices, const u16* const indices, u32 numIndices)  IRR_OVERRIDE 
+		{
+			// can't do that as it doesn't own the vertex memory
+		}
+
 		//! append the meshbuffer to the current buffer
-		virtual void append(const IMeshBuffer* const other) IRR_OVERRIDE {}
+		virtual void append(const IMeshBuffer* const other) IRR_OVERRIDE 
+		{
+			// can't do that as it doesn't own the vertex memory
+		}
 
 		//! get the current hardware mapping hint
 		virtual E_HARDWARE_MAPPING getHardwareMappingHint_Vertex() const IRR_OVERRIDE
@@ -232,6 +239,30 @@ namespace scene
 			return EMBT_SHARED;
 		}
 
+		//! Create copy of the meshbuffer
+		virtual IMeshBuffer* createClone(int cloneFlags) const IRR_OVERRIDE
+		{
+			SSharedMeshBuffer * clone = new SSharedMeshBuffer();
+
+			if (cloneFlags & ECF_VERTICES)
+			{
+				clone->Vertices = Vertices;
+				clone->BoundingBox = BoundingBox;
+			}
+
+			if (cloneFlags & ECF_INDICES)
+			{
+				clone->Indices = Indices;
+			}
+
+			clone->Material = Material;
+			clone->MappingHintVertex = MappingHintVertex;
+			clone->MappingHintIndex = MappingHintIndex;
+			clone->PrimitiveType = PrimitiveType;
+
+			return clone;
+		}
+
 		//! Material of this meshBuffer
 		video::SMaterial Material;
 

include/SSkinMeshBuffer.h

@@ -389,6 +389,35 @@ struct SSkinMeshBuffer : public IMeshBuffer
 		return EMBT_SKIN;
 	}
 
+	//! Create copy of the meshbuffer
+	virtual IMeshBuffer* createClone(int cloneFlags) const IRR_OVERRIDE
+	{
+		SSkinMeshBuffer* clone = new SSkinMeshBuffer(VertexType);
+
+		if (cloneFlags & ECF_VERTICES)
+		{
+			clone->Vertices_Tangents = Vertices_Tangents;
+			clone->Vertices_2TCoords = Vertices_2TCoords;
+			clone->Vertices_Standard = Vertices_Standard;
+
+			clone->BoundingBox = BoundingBox;
+			clone->BoundingBoxNeedsRecalculated = BoundingBoxNeedsRecalculated;
+		}
+
+		if (cloneFlags & ECF_INDICES)
+		{
+			clone->Indices = Indices;
+		}
+
+		clone->Transformation = Transformation;
+		clone->Material = getMaterial();
+		clone->PrimitiveType = PrimitiveType;
+		clone->MappingHint_Vertex = MappingHint_Vertex;
+		clone->MappingHint_Index = MappingHint_Index;
+
+		return clone;
+	}
+
 	//! Call this after changing the positions of any vertex.
 	void boundingBoxNeedsRecalculated(void) { BoundingBoxNeedsRecalculated = true; }
 

source/Irrlicht/CMeshManipulator.cpp

@@ -577,8 +577,7 @@ void CMeshManipulator::makePlanarTextureMapping(scene::IMesh* mesh, f32 resoluti
 }
 
 
-//! Clones a static IMesh into a modifyable SMesh.
+//! Clones a static IMesh into a modifiable SMesh.
-// not yet 32bit
 SMesh* CMeshManipulator::createMeshCopy(scene::IMesh* mesh) const
 {
 	if (!mesh)
@@ -590,66 +589,10 @@ SMesh* CMeshManipulator::createMeshCopy(scene::IMesh* mesh) const
 
 	for ( u32 b=0; b<meshBufferCount; ++b)
 	{
-		const IMeshBuffer* const mb = mesh->getMeshBuffer(b);
+		IMeshBuffer* bufferClone = mesh->getMeshBuffer(b)->createClone();
-		switch(mb->getVertexType())
+		clone->addMeshBuffer(bufferClone);
-		{
+		bufferClone->drop();
-		case video::EVT_STANDARD:
+	}
-			{
-				SMeshBuffer* buffer = new SMeshBuffer();
-				buffer->Material = mb->getMaterial();
-				const u32 vcount = mb->getVertexCount();
-				buffer->Vertices.reallocate(vcount);
-				video::S3DVertex* vertices = (video::S3DVertex*)mb->getVertices();
-				for (u32 i=0; i < vcount; ++i)
-					buffer->Vertices.push_back(vertices[i]);
-				const u32 icount = mb->getIndexCount();
-				buffer->Indices.reallocate(icount);
-				const u16* indices = mb->getIndices();
-				for (u32 i=0; i < icount; ++i)
-					buffer->Indices.push_back(indices[i]);
-				clone->addMeshBuffer(buffer);
-				buffer->drop();
-			}
-			break;
-		case video::EVT_2TCOORDS:
-			{
-				SMeshBufferLightMap* buffer = new SMeshBufferLightMap();
-				buffer->Material = mb->getMaterial();
-				const u32 vcount = mb->getVertexCount();
-				buffer->Vertices.reallocate(vcount);
-				video::S3DVertex2TCoords* vertices = (video::S3DVertex2TCoords*)mb->getVertices();
-				for (u32 i=0; i < vcount; ++i)
-					buffer->Vertices.push_back(vertices[i]);
-				const u32 icount = mb->getIndexCount();
-				buffer->Indices.reallocate(icount);
-				const u16* indices = mb->getIndices();
-				for (u32 i=0; i < icount; ++i)
-					buffer->Indices.push_back(indices[i]);
-				clone->addMeshBuffer(buffer);
-				buffer->drop();
-			}
-			break;
-		case video::EVT_TANGENTS:
-			{
-				SMeshBufferTangents* buffer = new SMeshBufferTangents();
-				buffer->Material = mb->getMaterial();
-				const u32 vcount = mb->getVertexCount();
-				buffer->Vertices.reallocate(vcount);
-				video::S3DVertexTangents* vertices = (video::S3DVertexTangents*)mb->getVertices();
-				for (u32 i=0; i < vcount; ++i)
-					buffer->Vertices.push_back(vertices[i]);
-				const u32 icount = mb->getIndexCount();
-				buffer->Indices.reallocate(icount);
-				const u16* indices = mb->getIndices();
-				for (u32 i=0; i < icount; ++i)
-					buffer->Indices.push_back(indices[i]);
-				clone->addMeshBuffer(buffer);
-				buffer->drop();
-			}
-			break;
-		}// end switch
-
-	}// end for all mesh buffers
 
 	clone->BoundingBox = mesh->getBoundingBox();
 	return clone;

source/Irrlicht/COBJMeshWriter.cpp

@@ -127,10 +127,10 @@ bool COBJMeshWriter::writeMesh(io::IWriteFile* file, scene::IMesh* mesh, s32 fla
 			file->write(num.c_str(), num.size());
 			file->write("\n",1);
 
+			unsigned int idx2=0, idx1=0, idx0 = 0;
 			const u32 indexCount = buffer->getIndexCount();
 			for (j=0; j<indexCount; j+=3)
 			{
-				unsigned int idx2, idx1, idx0;
 				switch(buffer->getIndexType())
 				{
 					case video::EIT_16BIT:

tests/tests-last-passed-at.txt

@@ -1,4 +1,4 @@
 Tests finished. 72 tests of 72 passed.
 Compiled as DEBUG
-Test suite pass at GMT Thu Apr 14 13:52:29 2022
+Test suite pass at GMT Thu Apr 14 16:41:11 2022