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History: MOGRE ManualSphereMeshes
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Source of version: 3
(current)
C# conversion of ((ManualSphereMeshes)) This code creates a sphere mesh with the given name: {CODE(wrap="1", colors="c#")}unsafe public void CreateSphere(string strName, float r, int nRings, int nSegments) { MeshPtr pSphere = MeshManager.Singleton.CreateManual(strName, ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME); SubMesh pSphereVertex = pSphere.CreateSubMesh(); pSphere.sharedVertexData = new VertexData(); VertexData vertexData = pSphere.sharedVertexData; // define the vertex format VertexDeclaration vertexDecl = vertexData.vertexDeclaration; uint currOffset = 0; // positions vertexDecl.AddElement(0, currOffset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_POSITION); currOffset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3); // normals vertexDecl.AddElement(0, currOffset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_NORMAL); currOffset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3); // two dimensional texture coordinates vertexDecl.AddElement(0, currOffset, VertexElementType.VET_FLOAT2, VertexElementSemantic.VES_TEXTURE_COORDINATES, 0); currOffset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT2); // allocate the vertex buffer vertexData.vertexCount = (uint)((nRings + 1) * (nSegments+1)); HardwareVertexBufferSharedPtr vBuf = HardwareBufferManager.Singleton.CreateVertexBuffer(vertexDecl.GetVertexSize(0), vertexData.vertexCount, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY, false); VertexBufferBinding binding = vertexData.vertexBufferBinding; binding.SetBinding(0, vBuf); float* pVertex = (float*)vBuf.Lock(HardwareBuffer.LockOptions.HBL_DISCARD); // allocate index buffer pSphereVertex.indexData.indexCount = (uint)(6 * nRings * (nSegments + 1)); pSphereVertex.indexData.indexBuffer = HardwareBufferManager.Singleton.CreateIndexBuffer(HardwareIndexBuffer.IndexType.IT_16BIT, pSphereVertex.indexData.indexCount, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY, false); HardwareIndexBufferSharedPtr iBuf = pSphereVertex.indexData.indexBuffer; ushort* pIndices = (ushort*)iBuf.Lock(HardwareBuffer.LockOptions.HBL_DISCARD); float fDeltaRingAngle = (float)(Mogre.Math.PI / nRings); float fDeltaSegAngle = (float)(2 * Mogre.Math.PI / nSegments); ushort wVerticeIndex = 0 ; // Generate the group of rings for the sphere for( int ring = 0; ring <= nRings; ring++ ) { float r0 = r * Mogre.Math.Sin(ring * fDeltaRingAngle); float y0 = r * Mogre.Math.Cos(ring * fDeltaRingAngle); // Generate the group of segments for the current ring for(int seg = 0; seg <= nSegments; seg++) { float x0 = r0 * Mogre.Math.Sin(seg * fDeltaSegAngle); float z0 = r0 * Mogre.Math.Cos(seg * fDeltaSegAngle); // Add one vertex to the strip which makes up the sphere *pVertex++ = x0; *pVertex++ = y0; *pVertex++ = z0; Vector3 vNormal = (new Vector3(x0, y0, z0)).NormalisedCopy; *pVertex++ = vNormal.x; *pVertex++ = vNormal.y; *pVertex++ = vNormal.z; *pVertex++ = (float) seg / (float) nSegments; *pVertex++ = (float) ring / (float) nRings; if (ring != nRings) { // each vertex (except the last) has six indices pointing to it *pIndices++ = (ushort)(wVerticeIndex + nSegments + 1); *pIndices++ = wVerticeIndex; *pIndices++ = (ushort)(wVerticeIndex + nSegments); *pIndices++ = (ushort)(wVerticeIndex + nSegments + 1); *pIndices++ = (ushort)(wVerticeIndex + 1); *pIndices++ = wVerticeIndex; wVerticeIndex ++; } }; // end for seg } // end for ring // Unlock vBuf.Unlock(); iBuf.Unlock(); // Generate face list pSphereVertex.useSharedVertices = true; // the original code was missing this line: pSphere._setBounds( new AxisAlignedBox( new Vector3(-r, -r, -r), new Vector3(r, r, r) ), false ); pSphere._setBoundingSphereRadius(r); // this line makes clear the mesh is loaded (avoids memory leaks) pSphere.Load(); }{CODE} The unnamed code is not verifiable by CRL and to compile it you must specify /unsafe compiler option. If you use Microsoft Visual Studio you should set to true 'Allow unsafe code block' option in project property window. The parameters are * strName - The Mesh's name. You'll use this to access it. * r - The sphere's radius. * nRings - Number of lines of longitude in the sphere. Defaults to 16. * nSegments - Number of lines of latitude in the sphere. Also defaults to 16. Here's an example of how you would use this function and attach the new mesh to a SceneNode: {CODE(wrap="1", colors="c#")} CreateSphere("MySphere", 10, 64, 64); Entity sphereEntity = Main.Instance.SceneManager.CreateEntity("SphereEntity", "MySphere"); SceneNode sphereNode = sceneManager.RootSceneNode.CreateChildSceneNode(); sphereEntity.SetMaterialName("material_name_goes_here"); sphereNode.AttachObject(sphereEntity);{CODE} Don't forget to replace "material_name_goes_here" with the name of your material.
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