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https://github.com/minetest/irrlicht.git
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8310a3fbad
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6000 dfc29bdd-3216-0410-991c-e03cc46cb475
819 lines
19 KiB
C++
819 lines
19 KiB
C++
// Copyright (C) 2009-2012 Gaz Davidson
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "IrrCompileConfig.h"
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#ifdef _IRR_COMPILE_WITH_PLY_LOADER_
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#include "CPLYMeshFileLoader.h"
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#include "IMeshManipulator.h"
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#include "SMesh.h"
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#include "CDynamicMeshBuffer.h"
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#include "SAnimatedMesh.h"
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#include "IReadFile.h"
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#include "fast_atof.h"
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#include "os.h"
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namespace irr
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{
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namespace scene
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{
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// input buffer must be at least twice as long as the longest line in the file
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#define PLY_INPUT_BUFFER_SIZE 51200 // file is loaded in 50k chunks
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// constructor
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CPLYMeshFileLoader::CPLYMeshFileLoader(scene::ISceneManager* smgr)
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: SceneManager(smgr), File(0), Buffer(0)
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{
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}
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CPLYMeshFileLoader::~CPLYMeshFileLoader()
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{
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// delete the buffer in case we didn't earlier
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// (we do, but this could be disabled to increase the speed of loading hundreds of meshes)
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if (Buffer)
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{
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delete [] Buffer;
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Buffer = 0;
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}
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// Destroy the element list if it exists
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for (u32 i=0; i<ElementList.size(); ++i)
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delete ElementList[i];
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ElementList.clear();
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}
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//! returns true if the file maybe is able to be loaded by this class
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bool CPLYMeshFileLoader::isALoadableFileExtension(const io::path& filename) const
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{
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return core::hasFileExtension(filename, "ply");
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}
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//! creates/loads an animated mesh from the file.
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IAnimatedMesh* CPLYMeshFileLoader::createMesh(io::IReadFile* file)
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{
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if (!file)
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return 0;
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File = file;
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File->grab();
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// attempt to allocate the buffer and fill with data
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if (!allocateBuffer())
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{
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File->drop();
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File = 0;
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return 0;
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}
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// start with empty mesh
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SAnimatedMesh* animMesh = 0;
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u32 vertCount=0;
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// Currently only supports ASCII meshes
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if (strcmp(getNextLine(), "ply"))
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{
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os::Printer::log("Not a valid PLY file", file->getFileName().c_str(), ELL_ERROR);
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}
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else
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{
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// cut the next line out
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getNextLine();
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// grab the word from this line
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c8 *word = getNextWord();
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// ignore comments
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while (strcmp(word, "comment") == 0)
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{
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getNextLine();
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word = getNextWord();
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}
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bool readingHeader = true;
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bool continueReading = true;
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IsBinaryFile = false;
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IsWrongEndian= false;
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do
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{
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if (strcmp(word, "format") == 0)
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{
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word = getNextWord();
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if (strcmp(word, "binary_little_endian") == 0)
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{
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IsBinaryFile = true;
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#ifdef __BIG_ENDIAN__
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IsWrongEndian = true;
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#endif
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}
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else if (strcmp(word, "binary_big_endian") == 0)
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{
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IsBinaryFile = true;
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#ifndef __BIG_ENDIAN__
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IsWrongEndian = true;
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#endif
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}
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else if (strcmp(word, "ascii"))
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{
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// abort if this isn't an ascii or a binary mesh
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os::Printer::log("Unsupported PLY mesh format", word, ELL_ERROR);
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continueReading = false;
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}
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if (continueReading)
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{
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word = getNextWord();
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if (strcmp(word, "1.0"))
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{
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os::Printer::log("Unsupported PLY mesh version", word, ELL_WARNING);
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}
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}
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}
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else if (strcmp(word, "property") == 0)
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{
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word = getNextWord();
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if (!ElementList.size())
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{
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os::Printer::log("PLY property found before element", word, ELL_WARNING);
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}
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else
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{
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// get element
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SPLYElement* el = ElementList[ElementList.size()-1];
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// fill property struct
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SPLYProperty prop;
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prop.Type = getPropertyType(word);
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el->KnownSize += prop.size();
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if (prop.Type == EPLYPT_LIST)
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{
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el->IsFixedWidth = false;
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word = getNextWord();
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prop.Data.List.CountType = getPropertyType(word);
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if (IsBinaryFile && prop.Data.List.CountType == EPLYPT_UNKNOWN)
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{
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os::Printer::log("Cannot read binary PLY file containing data types of unknown length", word, ELL_ERROR);
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continueReading = false;
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}
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else
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{
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word = getNextWord();
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prop.Data.List.ItemType = getPropertyType(word);
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if (IsBinaryFile && prop.Data.List.ItemType == EPLYPT_UNKNOWN)
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{
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os::Printer::log("Cannot read binary PLY file containing data types of unknown length", word, ELL_ERROR);
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continueReading = false;
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}
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}
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}
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else if (IsBinaryFile && prop.Type == EPLYPT_UNKNOWN)
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{
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os::Printer::log("Cannot read binary PLY file containing data types of unknown length", word, ELL_ERROR);
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continueReading = false;
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}
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prop.Name = getNextWord();
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// add property to element
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el->Properties.push_back(prop);
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}
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}
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else if (strcmp(word, "element") == 0)
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{
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SPLYElement* el = new SPLYElement;
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el->Name = getNextWord();
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el->Count = atoi(getNextWord());
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el->IsFixedWidth = true;
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el->KnownSize = 0;
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ElementList.push_back(el);
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if (el->Name == "vertex")
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vertCount = el->Count;
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}
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else if (strcmp(word, "end_header") == 0)
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{
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readingHeader = false;
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if (IsBinaryFile)
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{
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StartPointer = LineEndPointer + 1;
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}
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}
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else if (strcmp(word, "comment") == 0)
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{
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// ignore line
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}
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else
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{
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os::Printer::log("Unknown item in PLY file", word, ELL_WARNING);
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}
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if (readingHeader && continueReading)
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{
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getNextLine();
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word = getNextWord();
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}
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}
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while (readingHeader && continueReading);
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// now to read the actual data from the file
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if (continueReading)
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{
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// create a mesh buffer
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CDynamicMeshBuffer *mb = new CDynamicMeshBuffer(video::EVT_STANDARD, vertCount > 65565 ? video::EIT_32BIT : video::EIT_16BIT);
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mb->getVertexBuffer().reallocate(vertCount);
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mb->getIndexBuffer().reallocate(vertCount);
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mb->setHardwareMappingHint(EHM_STATIC);
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bool hasNormals=true;
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// loop through each of the elements
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for (u32 i=0; i<ElementList.size(); ++i)
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{
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// do we want this element type?
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if (ElementList[i]->Name == "vertex")
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{
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// loop through vertex properties
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for (u32 j=0; j < ElementList[i]->Count; ++j)
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hasNormals &= readVertex(*ElementList[i], mb);
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}
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else if (ElementList[i]->Name == "face")
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{
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// read faces
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for (u32 j=0; j < ElementList[i]->Count; ++j)
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readFace(*ElementList[i], mb);
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}
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else
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{
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// skip these elements
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for (u32 j=0; j < ElementList[i]->Count; ++j)
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skipElement(*ElementList[i]);
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}
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}
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mb->recalculateBoundingBox();
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if (!hasNormals)
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SceneManager->getMeshManipulator()->recalculateNormals(mb);
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SMesh* m = new SMesh();
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m->addMeshBuffer(mb);
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m->recalculateBoundingBox();
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mb->drop();
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animMesh = new SAnimatedMesh();
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animMesh->addMesh(m);
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animMesh->recalculateBoundingBox();
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m->drop();
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}
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}
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// free the buffer
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delete [] Buffer;
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Buffer = 0;
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File->drop();
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File = 0;
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// if we managed to create a mesh, return it
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return animMesh;
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}
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bool CPLYMeshFileLoader::readVertex(const SPLYElement &Element, scene::CDynamicMeshBuffer* mb)
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{
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if (!IsBinaryFile)
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getNextLine();
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video::S3DVertex vert;
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vert.Color.set(255,255,255,255);
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vert.TCoords.X = 0.0f;
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vert.TCoords.Y = 0.0f;
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vert.Normal.X = 0.0f;
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vert.Normal.Y = 1.0f;
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vert.Normal.Z = 0.0f;
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bool result=false;
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for (u32 i=0; i < Element.Properties.size(); ++i)
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{
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E_PLY_PROPERTY_TYPE t = Element.Properties[i].Type;
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if (Element.Properties[i].Name == "x")
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vert.Pos.X = getFloat(t);
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else if (Element.Properties[i].Name == "y")
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vert.Pos.Z = getFloat(t);
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else if (Element.Properties[i].Name == "z")
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vert.Pos.Y = getFloat(t);
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else if (Element.Properties[i].Name == "nx")
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{
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vert.Normal.X = getFloat(t);
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result=true;
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}
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else if (Element.Properties[i].Name == "ny")
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{
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vert.Normal.Z = getFloat(t);
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result=true;
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}
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else if (Element.Properties[i].Name == "nz")
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{
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vert.Normal.Y = getFloat(t);
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result=true;
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}
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// there isn't a single convention for the UV, some software like Blender or Assimp uses "st" instead of "uv"
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else if (Element.Properties[i].Name == "u" || Element.Properties[i].Name == "s")
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vert.TCoords.X = getFloat(t);
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else if (Element.Properties[i].Name == "v" || Element.Properties[i].Name == "t")
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vert.TCoords.Y = getFloat(t);
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else if (Element.Properties[i].Name == "red")
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{
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u32 value = Element.Properties[i].isFloat() ? (u32)(getFloat(t)*255.0f) : getInt(t);
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vert.Color.setRed(value);
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}
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else if (Element.Properties[i].Name == "green")
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{
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u32 value = Element.Properties[i].isFloat() ? (u32)(getFloat(t)*255.0f) : getInt(t);
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vert.Color.setGreen(value);
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}
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else if (Element.Properties[i].Name == "blue")
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{
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u32 value = Element.Properties[i].isFloat() ? (u32)(getFloat(t)*255.0f) : getInt(t);
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vert.Color.setBlue(value);
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}
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else if (Element.Properties[i].Name == "alpha")
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{
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u32 value = Element.Properties[i].isFloat() ? (u32)(getFloat(t)*255.0f) : getInt(t);
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vert.Color.setAlpha(value);
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}
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else
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skipProperty(Element.Properties[i]);
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}
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mb->getVertexBuffer().push_back(vert);
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return result;
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}
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bool CPLYMeshFileLoader::readFace(const SPLYElement &Element, scene::CDynamicMeshBuffer* mb)
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{
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if (!IsBinaryFile)
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getNextLine();
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for (u32 i=0; i < Element.Properties.size(); ++i)
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{
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if ( (Element.Properties[i].Name == "vertex_indices" ||
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Element.Properties[i].Name == "vertex_index") && Element.Properties[i].Type == EPLYPT_LIST)
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{
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// get count
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s32 count = getInt(Element.Properties[i].Data.List.CountType);
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u32 a = getInt(Element.Properties[i].Data.List.ItemType),
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b = getInt(Element.Properties[i].Data.List.ItemType),
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c = getInt(Element.Properties[i].Data.List.ItemType);
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s32 j = 3;
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mb->getIndexBuffer().push_back(a);
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mb->getIndexBuffer().push_back(c);
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mb->getIndexBuffer().push_back(b);
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for (; j < count; ++j)
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{
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b = c;
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c = getInt(Element.Properties[i].Data.List.ItemType);
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mb->getIndexBuffer().push_back(a);
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mb->getIndexBuffer().push_back(c);
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mb->getIndexBuffer().push_back(b);
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}
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}
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else if (Element.Properties[i].Name == "intensity")
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{
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// todo: face intensity
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skipProperty(Element.Properties[i]);
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}
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else
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skipProperty(Element.Properties[i]);
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}
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return true;
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}
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// skips an element and all properties. return false on EOF
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void CPLYMeshFileLoader::skipElement(const SPLYElement &Element)
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{
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if (IsBinaryFile)
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if (Element.IsFixedWidth)
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moveForward(Element.KnownSize);
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else
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for (u32 i=0; i < Element.Properties.size(); ++i)
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skipProperty(Element.Properties[i]);
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else
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getNextLine();
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}
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void CPLYMeshFileLoader::skipProperty(const SPLYProperty &Property)
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{
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if (Property.Type == EPLYPT_LIST)
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{
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s32 count = getInt(Property.Data.List.CountType);
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for (s32 i=0; i < count; ++i)
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getInt(Property.Data.List.CountType);
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}
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else
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{
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if (IsBinaryFile)
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moveForward(Property.size());
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else
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getNextWord();
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}
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}
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bool CPLYMeshFileLoader::allocateBuffer()
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{
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// Destroy the element list if it exists
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for (u32 i=0; i<ElementList.size(); ++i)
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delete ElementList[i];
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ElementList.clear();
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if (!Buffer)
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Buffer = new c8[PLY_INPUT_BUFFER_SIZE];
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// not enough memory?
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if (!Buffer)
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return false;
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// blank memory
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memset(Buffer, 0, PLY_INPUT_BUFFER_SIZE);
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StartPointer = Buffer;
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EndPointer = Buffer;
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LineEndPointer = Buffer-1;
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WordLength = -1;
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EndOfFile = false;
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// get data from the file
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fillBuffer();
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return true;
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}
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// gets more data from the file. returns false on EOF
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void CPLYMeshFileLoader::fillBuffer()
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{
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if (EndOfFile)
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return;
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size_t length = (size_t)(EndPointer - StartPointer);
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if (length && StartPointer != Buffer)
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{
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// copy the remaining data to the start of the buffer
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memcpy(Buffer, StartPointer, length);
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}
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// reset start position
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StartPointer = Buffer;
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EndPointer = StartPointer + length;
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if (File->getPos() == File->getSize())
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{
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EndOfFile = true;
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}
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else
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{
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// read data from the file
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size_t count = File->read(EndPointer, PLY_INPUT_BUFFER_SIZE - length);
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// increment the end pointer by the number of bytes read
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EndPointer = EndPointer + count;
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// if we didn't completely fill the buffer
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if (count != PLY_INPUT_BUFFER_SIZE - length)
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{
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// blank the rest of the memory
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memset(EndPointer, 0, Buffer + PLY_INPUT_BUFFER_SIZE - EndPointer);
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// end of file
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EndOfFile = true;
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}
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}
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}
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// skips x bytes in the file, getting more data if required
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void CPLYMeshFileLoader::moveForward(u32 bytes)
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{
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if (StartPointer + bytes >= EndPointer)
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fillBuffer();
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if (StartPointer + bytes < EndPointer)
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StartPointer += bytes;
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else
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StartPointer = EndPointer;
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}
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E_PLY_PROPERTY_TYPE CPLYMeshFileLoader::getPropertyType(const c8* typeString) const
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{
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if (strcmp(typeString, "char") == 0 ||
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strcmp(typeString, "uchar") == 0 ||
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strcmp(typeString, "int8") == 0 ||
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strcmp(typeString, "uint8") == 0)
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{
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return EPLYPT_INT8;
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}
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else if (strcmp(typeString, "uint") == 0 ||
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strcmp(typeString, "int16") == 0 ||
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strcmp(typeString, "uint16") == 0 ||
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strcmp(typeString, "short") == 0 ||
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strcmp(typeString, "ushort") == 0)
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{
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return EPLYPT_INT16;
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}
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else if (strcmp(typeString, "int") == 0 ||
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strcmp(typeString, "long") == 0 ||
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strcmp(typeString, "ulong") == 0 ||
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strcmp(typeString, "int32") == 0 ||
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strcmp(typeString, "uint32") == 0)
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{
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return EPLYPT_INT32;
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}
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else if (strcmp(typeString, "float") == 0 ||
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strcmp(typeString, "float32") == 0)
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{
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return EPLYPT_FLOAT32;
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}
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else if (strcmp(typeString, "float64") == 0 ||
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strcmp(typeString, "double") == 0)
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{
|
|
return EPLYPT_FLOAT64;
|
|
}
|
|
else if ( strcmp(typeString, "list") == 0 )
|
|
{
|
|
return EPLYPT_LIST;
|
|
}
|
|
else
|
|
{
|
|
// unsupported type.
|
|
// cannot be loaded in binary mode
|
|
return EPLYPT_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
|
|
// Split the string data into a line in place by terminating it instead of copying.
|
|
c8* CPLYMeshFileLoader::getNextLine()
|
|
{
|
|
// move the start pointer along
|
|
StartPointer = LineEndPointer + 1;
|
|
|
|
// crlf split across buffer move
|
|
if (*StartPointer == '\n')
|
|
{
|
|
*StartPointer = '\0';
|
|
++StartPointer;
|
|
}
|
|
|
|
// begin at the start of the next line
|
|
c8* pos = StartPointer;
|
|
while (pos < EndPointer && *pos && *pos != '\r' && *pos != '\n')
|
|
++pos;
|
|
|
|
if ( pos < EndPointer && ( *(pos+1) == '\r' || *(pos+1) == '\n') )
|
|
{
|
|
*pos = '\0';
|
|
++pos;
|
|
}
|
|
|
|
// we have reached the end of the buffer
|
|
if (pos >= EndPointer)
|
|
{
|
|
// get data from the file
|
|
if (!EndOfFile)
|
|
{
|
|
fillBuffer();
|
|
// reset line end pointer
|
|
LineEndPointer = StartPointer - 1;
|
|
|
|
if (StartPointer != EndPointer)
|
|
return getNextLine();
|
|
else
|
|
return Buffer;
|
|
}
|
|
else
|
|
{
|
|
// EOF
|
|
StartPointer = EndPointer-1;
|
|
*StartPointer = '\0';
|
|
return StartPointer;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// null terminate the string in place
|
|
*pos = '\0';
|
|
LineEndPointer = pos;
|
|
WordLength = -1;
|
|
// return pointer to the start of the line
|
|
return StartPointer;
|
|
}
|
|
}
|
|
|
|
|
|
// null terminate the next word on the previous line and move the next word pointer along
|
|
// since we already have a full line in the buffer, we never need to retrieve more data
|
|
c8* CPLYMeshFileLoader::getNextWord()
|
|
{
|
|
// move the start pointer along
|
|
StartPointer += WordLength + 1;
|
|
|
|
if (StartPointer == LineEndPointer)
|
|
{
|
|
WordLength = -1; //
|
|
return LineEndPointer;
|
|
}
|
|
// begin at the start of the next word
|
|
c8* pos = StartPointer;
|
|
while (*pos && pos < LineEndPointer && pos < EndPointer && *pos != ' ' && *pos != '\t')
|
|
++pos;
|
|
|
|
while(*pos && pos < LineEndPointer && pos < EndPointer && (*pos == ' ' || *pos == '\t') )
|
|
{
|
|
// null terminate the string in place
|
|
*pos = '\0';
|
|
++pos;
|
|
}
|
|
--pos;
|
|
WordLength = (s32)(pos-StartPointer);
|
|
// return pointer to the start of the word
|
|
return StartPointer;
|
|
}
|
|
|
|
|
|
// read the next float from the file and move the start pointer along
|
|
f32 CPLYMeshFileLoader::getFloat(E_PLY_PROPERTY_TYPE t)
|
|
{
|
|
f32 retVal = 0.0f;
|
|
|
|
if (IsBinaryFile)
|
|
{
|
|
if (EndPointer - StartPointer < 8)
|
|
fillBuffer();
|
|
|
|
if (EndPointer - StartPointer > 0)
|
|
{
|
|
switch (t)
|
|
{
|
|
case EPLYPT_INT8:
|
|
retVal = *StartPointer;
|
|
StartPointer++;
|
|
break;
|
|
case EPLYPT_INT16:
|
|
if (IsWrongEndian)
|
|
retVal = os::Byteswap::byteswap(*(reinterpret_cast<s16*>(StartPointer)));
|
|
else
|
|
retVal = *(reinterpret_cast<s16*>(StartPointer));
|
|
StartPointer += 2;
|
|
break;
|
|
case EPLYPT_INT32:
|
|
if (IsWrongEndian)
|
|
retVal = f32(os::Byteswap::byteswap(*(reinterpret_cast<s32*>(StartPointer))));
|
|
else
|
|
retVal = f32(*(reinterpret_cast<s32*>(StartPointer)));
|
|
StartPointer += 4;
|
|
break;
|
|
case EPLYPT_FLOAT32:
|
|
if (IsWrongEndian)
|
|
retVal = os::Byteswap::byteswap(*(reinterpret_cast<f32*>(StartPointer)));
|
|
else
|
|
retVal = *(reinterpret_cast<f32*>(StartPointer));
|
|
StartPointer += 4;
|
|
break;
|
|
case EPLYPT_FLOAT64:
|
|
// todo: byteswap 64-bit
|
|
retVal = f32(*(reinterpret_cast<f64*>(StartPointer)));
|
|
StartPointer += 8;
|
|
break;
|
|
case EPLYPT_LIST:
|
|
case EPLYPT_UNKNOWN:
|
|
default:
|
|
retVal = 0.0f;
|
|
StartPointer++; // ouch!
|
|
}
|
|
}
|
|
else
|
|
retVal = 0.0f;
|
|
}
|
|
else
|
|
{
|
|
c8* word = getNextWord();
|
|
switch (t)
|
|
{
|
|
case EPLYPT_INT8:
|
|
case EPLYPT_INT16:
|
|
case EPLYPT_INT32:
|
|
retVal = f32(atoi(word));
|
|
break;
|
|
case EPLYPT_FLOAT32:
|
|
case EPLYPT_FLOAT64:
|
|
retVal = f32(atof(word));
|
|
break;
|
|
case EPLYPT_LIST:
|
|
case EPLYPT_UNKNOWN:
|
|
default:
|
|
retVal = 0.0f;
|
|
}
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
|
|
// read the next int from the file and move the start pointer along
|
|
u32 CPLYMeshFileLoader::getInt(E_PLY_PROPERTY_TYPE t)
|
|
{
|
|
u32 retVal = 0;
|
|
|
|
if (IsBinaryFile)
|
|
{
|
|
if (!EndOfFile && EndPointer - StartPointer < 8)
|
|
fillBuffer();
|
|
|
|
if (EndPointer - StartPointer)
|
|
{
|
|
switch (t)
|
|
{
|
|
case EPLYPT_INT8:
|
|
retVal = *StartPointer;
|
|
StartPointer++;
|
|
break;
|
|
case EPLYPT_INT16:
|
|
if (IsWrongEndian)
|
|
retVal = os::Byteswap::byteswap(*(reinterpret_cast<u16*>(StartPointer)));
|
|
else
|
|
retVal = *(reinterpret_cast<u16*>(StartPointer));
|
|
StartPointer += 2;
|
|
break;
|
|
case EPLYPT_INT32:
|
|
if (IsWrongEndian)
|
|
retVal = os::Byteswap::byteswap(*(reinterpret_cast<s32*>(StartPointer)));
|
|
else
|
|
retVal = *(reinterpret_cast<s32*>(StartPointer));
|
|
StartPointer += 4;
|
|
break;
|
|
case EPLYPT_FLOAT32:
|
|
if (IsWrongEndian)
|
|
retVal = (u32)os::Byteswap::byteswap(*(reinterpret_cast<f32*>(StartPointer)));
|
|
else
|
|
retVal = (u32)(*(reinterpret_cast<f32*>(StartPointer)));
|
|
StartPointer += 4;
|
|
break;
|
|
case EPLYPT_FLOAT64:
|
|
// todo: byteswap 64-bit
|
|
retVal = (u32)(*(reinterpret_cast<f64*>(StartPointer)));
|
|
StartPointer += 8;
|
|
break;
|
|
case EPLYPT_LIST:
|
|
case EPLYPT_UNKNOWN:
|
|
default:
|
|
retVal = 0;
|
|
StartPointer++; // ouch!
|
|
}
|
|
}
|
|
else
|
|
retVal = 0;
|
|
}
|
|
else
|
|
{
|
|
c8* word = getNextWord();
|
|
switch (t)
|
|
{
|
|
case EPLYPT_INT8:
|
|
case EPLYPT_INT16:
|
|
case EPLYPT_INT32:
|
|
retVal = atoi(word);
|
|
break;
|
|
case EPLYPT_FLOAT32:
|
|
case EPLYPT_FLOAT64:
|
|
retVal = u32(atof(word));
|
|
break;
|
|
case EPLYPT_LIST:
|
|
case EPLYPT_UNKNOWN:
|
|
default:
|
|
retVal = 0;
|
|
}
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
|
|
|
|
} // end namespace scene
|
|
} // end namespace irr
|
|
|
|
#endif // _IRR_COMPILE_WITH_PLY_LOADER_
|
|
|