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0a419c51ed
Added RWGltf_CafReader class implementing glTF reader. Added readgltf Draw Harness command for reading glTF files.
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
// Author: Kirill Gavrilov
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// Copyright (c) 2019 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <RWGltf_PrimitiveArrayReader.hxx>
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#include <RWGltf_GltfLatePrimitiveArray.hxx>
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#include <BRep_Builder.hxx>
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#include <Message.hxx>
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#include <Message_Messenger.hxx>
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#include <OSD_OpenFile.hxx>
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#include <Standard_ArrayStreamBuffer.hxx>
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#include <TopoDS.hxx>
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#include <TopoDS_Iterator.hxx>
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IMPLEMENT_STANDARD_RTTIEXT(RWGltf_PrimitiveArrayReader, Standard_Transient)
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// =======================================================================
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// function : reportError
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// purpose :
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// =======================================================================
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void RWGltf_PrimitiveArrayReader::reportError (const TCollection_AsciiString& theText)
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{
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Message::DefaultMessenger()->Send (myErrorPrefix + theText, Message_Fail);
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}
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// =======================================================================
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// function : load
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// purpose :
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// =======================================================================
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bool RWGltf_PrimitiveArrayReader::load (const Handle(RWGltf_GltfLatePrimitiveArray)& theMesh)
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{
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reset();
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if (theMesh.IsNull()
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|| theMesh->PrimitiveMode() == RWGltf_GltfPrimitiveMode_UNKNOWN)
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{
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return false;
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}
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for (NCollection_Sequence<RWGltf_GltfPrimArrayData>::Iterator aDataIter (theMesh->Data()); aDataIter.More(); aDataIter.Next())
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{
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const RWGltf_GltfPrimArrayData& aData = aDataIter.Value();
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if (!aData.StreamData.IsNull())
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{
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Standard_ArrayStreamBuffer aStreamBuffer ((const char* )aData.StreamData->Data(), aData.StreamData->Size());
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std::istream aStream (&aStreamBuffer);
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aStream.seekg ((std::streamoff )aData.StreamOffset, std::ios_base::beg);
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if (!readBuffer (aStream, theMesh->Id(), aData.Accessor, aData.Type, theMesh->PrimitiveMode()))
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{
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return false;
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}
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continue;
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}
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else if (aData.StreamUri.IsEmpty())
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{
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reportError (TCollection_AsciiString ("Buffer '") + theMesh->Id() + "' does not define uri.");
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return false;
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}
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if (mySharedStream.Path != aData.StreamUri)
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{
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mySharedStream.Stream.close();
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mySharedStream.Path = aData.StreamUri;
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}
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if (!mySharedStream.Stream.is_open())
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{
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OSD_OpenStream (mySharedStream.Stream, aData.StreamUri.ToCString(), std::ios::in | std::ios::binary);
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if (!mySharedStream.Stream.is_open())
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{
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mySharedStream.Stream.close();
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reportError (TCollection_AsciiString ("Buffer '") + theMesh->Id() + "refers to non-existing file '" + aData.StreamUri + "'.");
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return false;
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}
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}
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mySharedStream.Stream.seekg ((std::streamoff )aData.StreamOffset, std::ios_base::beg);
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if (!mySharedStream.Stream.good())
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{
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mySharedStream.Stream.close();
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reportError (TCollection_AsciiString ("Buffer '") + theMesh->Id() + "refers to invalid location.");
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return false;
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}
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if (!readBuffer (mySharedStream.Stream, theMesh->Id(), aData.Accessor, aData.Type, theMesh->PrimitiveMode()))
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{
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return false;
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}
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}
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return true;
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}
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