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Merge pull request #421 from heandreas/master 

Added binary ply exporter.
pull/429/head
Alexander Gessler 2014-12-12 00:05:26 +01:00
parent 1e943d9fd4 ab7754ab2a
commit 29c09b24e7
3 changed files with 111 additions and 7 deletions
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4
code/Exporter.cpp
View File

@ -78,6 +78,7 @@ void ExportSceneObj(const char*,IOSystem*, const aiScene*);
void ExportSceneSTL(const char*,IOSystem*, const aiScene*);
void ExportSceneSTLBinary(const char*,IOSystem*, const aiScene*);
void ExportScenePly(const char*,IOSystem*, const aiScene*);
void ExportScenePlyBinary(const char*, IOSystem*, const aiScene*);
void ExportScene3DS(const char*, IOSystem*, const aiScene*);
void ExportSceneAssbin(const char*, IOSystem*, const aiScene*);
void ExportSceneAssxml(const char*, IOSystem*, const aiScene*);
@ -113,6 +114,9 @@ Exporter::ExportFormatEntry gExporters[] =
Exporter::ExportFormatEntry( "ply", "Stanford Polygon Library", "ply" , &ExportScenePly,
aiProcess_PreTransformVertices
),
Exporter::ExportFormatEntry( "plyb", "Stanford Polygon Library (binary)", "ply", &ExportScenePlyBinary,
aiProcess_PreTransformVertices
),
#endif
#ifndef ASSIMP_BUILD_NO_3DS_EXPORTER

109
code/PlyExporter.cpp
View File

@ -64,6 +64,20 @@ void ExportScenePly(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene
outfile->Write( exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()),1);
}
void ExportScenePlyBinary(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene)
{
// invoke the exporter
PlyExporter exporter(pFile, pScene, true);
// we're still here - export successfully completed. Write the file.
boost::scoped_ptr<IOStream> outfile(pIOSystem->Open(pFile, "wb"));
if (outfile == NULL) {
throw DeadlyExportError("could not open output .ply file: " + std::string(pFile));
}
outfile->Write(exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()), 1);
}
} // end of namespace Assimp
#define PLY_EXPORT_HAS_NORMALS 0x1
@ -72,7 +86,7 @@ void ExportScenePly(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene
#define PLY_EXPORT_HAS_COLORS (PLY_EXPORT_HAS_TEXCOORDS << AI_MAX_NUMBER_OF_TEXTURECOORDS)
// ------------------------------------------------------------------------------------------------
PlyExporter :: PlyExporter(const char* _filename, const aiScene* pScene)
PlyExporter::PlyExporter(const char* _filename, const aiScene* pScene, bool binary)
: filename(_filename)
, pScene(pScene)
, endl("\n")
@ -102,7 +116,16 @@ PlyExporter :: PlyExporter(const char* _filename, const aiScene* pScene)
}
mOutput << "ply" << endl;
mOutput << "format ascii 1.0" << endl;
if (binary) {
#if (defined AI_BUILD_BIG_ENDIAN)
mOutput << "format binary_big_endian 1.0" << endl;
#else
mOutput << "format binary_little_endian 1.0" << endl;
#endif
}
else {
mOutput << "format ascii 1.0" << endl;
}
mOutput << "comment Created by Open Asset Import Library - http://assimp.sf.net (v"
<< aiGetVersionMajor() << '.' << aiGetVersionMinor() << '.'
<< aiGetVersionRevision() << ")" << endl;
@ -163,17 +186,29 @@ PlyExporter :: PlyExporter(const char* _filename, const aiScene* pScene)
mOutput << "end_header" << endl;
for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
WriteMeshVerts(pScene->mMeshes[i],components);
if (binary) {
WriteMeshVertsBinary(pScene->mMeshes[i], components);
}
else {
WriteMeshVerts(pScene->mMeshes[i], components);
}
}
for (unsigned int i = 0, ofs = 0; i < pScene->mNumMeshes; ++i) {
WriteMeshIndices(pScene->mMeshes[i],ofs);
if (binary) {
WriteMeshIndicesBinary(pScene->mMeshes[i], ofs);
}
else {
WriteMeshIndices(pScene->mMeshes[i], ofs);
}
ofs += pScene->mMeshes[i]->mNumVertices;
}
}
// ------------------------------------------------------------------------------------------------
void PlyExporter :: WriteMeshVerts(const aiMesh* m, unsigned int components)
void PlyExporter::WriteMeshVerts(const aiMesh* m, unsigned int components)
{
// If a component (for instance normal vectors) is present in at least one mesh in the scene,
// then default values are written for meshes that do not contain this component.
for (unsigned int i = 0; i < m->mNumVertices; ++i) {
mOutput <<
m->mVertices[i].x << " " <<
@ -237,7 +272,57 @@ void PlyExporter :: WriteMeshVerts(const aiMesh* m, unsigned int components)
}
// ------------------------------------------------------------------------------------------------
void PlyExporter :: WriteMeshIndices(const aiMesh* m, unsigned int offset)
void PlyExporter::WriteMeshVertsBinary(const aiMesh* m, unsigned int components)
{
// If a component (for instance normal vectors) is present in at least one mesh in the scene,
// then default values are written for meshes that do not contain this component.
aiVector3D defaultNormal(0, 0, 0);
aiVector2D defaultUV(-1, -1);
aiColor4D defaultColor(-1, -1, -1, -1);
for (unsigned int i = 0; i < m->mNumVertices; ++i) {
mOutput.write(reinterpret_cast<const char*>(&m->mVertices[i].x), 12);
if (components & PLY_EXPORT_HAS_NORMALS) {
if (m->HasNormals()) {
mOutput.write(reinterpret_cast<const char*>(&m->mNormals[i].x), 12);
}
else {
mOutput.write(reinterpret_cast<const char*>(&defaultNormal.x), 12);
}
}
for (unsigned int n = PLY_EXPORT_HAS_TEXCOORDS, c = 0; (components & n) && c != AI_MAX_NUMBER_OF_TEXTURECOORDS; n <<= 1, ++c) {
if (m->HasTextureCoords(c)) {
mOutput.write(reinterpret_cast<const char*>(&m->mTextureCoords[c][i].x), 6);
}
else {
mOutput.write(reinterpret_cast<const char*>(&defaultUV.x), 6);
}
}
for (unsigned int n = PLY_EXPORT_HAS_COLORS, c = 0; (components & n) && c != AI_MAX_NUMBER_OF_COLOR_SETS; n <<= 1, ++c) {
if (m->HasVertexColors(c)) {
mOutput.write(reinterpret_cast<const char*>(&m->mColors[c][i].r), 16);
}
else {
mOutput.write(reinterpret_cast<const char*>(&defaultColor.r), 16);
}
}
if (components & PLY_EXPORT_HAS_TANGENTS_BITANGENTS) {
if (m->HasTangentsAndBitangents()) {
mOutput.write(reinterpret_cast<const char*>(&m->mTangents[i].x), 12);
mOutput.write(reinterpret_cast<const char*>(&m->mBitangents[i].x), 12);
}
else {
mOutput.write(reinterpret_cast<const char*>(&defaultNormal.x), 12);
mOutput.write(reinterpret_cast<const char*>(&defaultNormal.x), 12);
}
}
}
}
// ------------------------------------------------------------------------------------------------
void PlyExporter::WriteMeshIndices(const aiMesh* m, unsigned int offset)
{
for (unsigned int i = 0; i < m->mNumFaces; ++i) {
const aiFace& f = m->mFaces[i];
@ -248,4 +333,16 @@ void PlyExporter :: WriteMeshIndices(const aiMesh* m, unsigned int offset)
}
}
void PlyExporter::WriteMeshIndicesBinary(const aiMesh* m, unsigned int offset)
{
for (unsigned int i = 0; i < m->mNumFaces; ++i) {
const aiFace& f = m->mFaces[i];
mOutput.write(reinterpret_cast<const char*>(&f.mNumIndices), 4);
for (unsigned int c = 0; c < f.mNumIndices; ++c) {
unsigned int index = f.mIndices[c] + offset;
mOutput.write(reinterpret_cast<const char*>(&index), 4);
}
}
}
#endif

5
code/PlyExporter.h
View File

@ -59,7 +59,7 @@ class PlyExporter
{
public:
/// Constructor for a specific scene to export
PlyExporter(const char* filename, const aiScene* pScene);
PlyExporter(const char* filename, const aiScene* pScene, bool binary = false);
public:
@ -71,6 +71,9 @@ private:
void WriteMeshVerts(const aiMesh* m, unsigned int components);
void WriteMeshIndices(const aiMesh* m, unsigned int ofs);
void WriteMeshVertsBinary(const aiMesh* m, unsigned int components);
void WriteMeshIndicesBinary(const aiMesh* m, unsigned int offset);
private:
const std::string filename;