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assimp/code/AssetLib/XGL/XGLLoader.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2022, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/
/** @file Implementation of the XGL/ZGL importer class */
#ifndef ASSIMP_BUILD_NO_XGL_IMPORTER
#include "XGLLoader.h"
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <assimp/MemoryIOWrapper.h>
#include <assimp/StreamReader.h>
#include <assimp/importerdesc.h>
#include <assimp/mesh.h>
#include <assimp/scene.h>
#include <cctype>
#include <memory>
using namespace Assimp;
// zlib is needed for compressed XGL files
#ifndef ASSIMP_BUILD_NO_COMPRESSED_XGL
# ifdef ASSIMP_BUILD_NO_OWN_ZLIB
# include <zlib.h>
# else
# include <contrib/zlib/zlib.h>
# endif
#endif
namespace Assimp { // this has to be in here because LogFunctions is in ::Assimp
template <>
const char *LogFunctions<XGLImporter>::Prefix() {
static auto prefix = "XGL: ";
return prefix;
}
} // namespace Assimp
static const aiImporterDesc desc = {
"XGL Importer",
"",
"",
"",
aiImporterFlags_SupportTextFlavour | aiImporterFlags_SupportCompressedFlavour,
0,
0,
0,
0,
"xgl zgl"
};
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
XGLImporter::XGLImporter() :
mXmlParser(nullptr),
m_scene(nullptr) {
// empty
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
XGLImporter::~XGLImporter() {
delete mXmlParser;
}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool XGLImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
/* NOTE: A simple check for the file extension is not enough
* here. XGL and ZGL are ok, but xml is too generic
* and might be collada as well. So open the file and
* look for typical signal tokens.
*/
const std::string extension = GetExtension(pFile);
if (extension == "xgl" || extension == "zgl") {
return true;
}
if (extension == "xml" || checkSig) {
ai_assert(pIOHandler != nullptr);
static const char * const tokens[] = { "<world>", "<World>", "<WORLD>" };
return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 3);
}
return false;
}
// ------------------------------------------------------------------------------------------------
// Get a list of all file extensions which are handled by this class
const aiImporterDesc *XGLImporter::GetInfo() const {
return &desc;
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void XGLImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
#ifndef ASSIMP_BUILD_NO_COMPRESSED_XGL
std::vector<Bytef> uncompressed;
#endif
m_scene = pScene;
std::shared_ptr<IOStream> stream(pIOHandler->Open(pFile, "rb"));
// check whether we can read from the file
if (stream.get() == NULL) {
throw DeadlyImportError("Failed to open XGL/ZGL file " + pFile);
}
// see if its compressed, if so uncompress it
if (GetExtension(pFile) == "zgl") {
#ifdef ASSIMP_BUILD_NO_COMPRESSED_XGL
ThrowException("Cannot read ZGL file since Assimp was built without compression support");
#else
std::unique_ptr<StreamReaderLE> raw_reader(new StreamReaderLE(stream));
// build a zlib stream
z_stream zstream;
zstream.opaque = Z_NULL;
zstream.zalloc = Z_NULL;
zstream.zfree = Z_NULL;
zstream.data_type = Z_BINARY;
// raw decompression without a zlib or gzip header
inflateInit2(&zstream, -MAX_WBITS);
// skip two extra bytes, zgl files do carry a crc16 upfront (I think)
raw_reader->IncPtr(2);
zstream.next_in = reinterpret_cast<Bytef *>(raw_reader->GetPtr());
zstream.avail_in = (uInt) raw_reader->GetRemainingSize();
size_t total = 0l;
// TODO: be smarter about this, decompress directly into heap buffer
// and decompress the data .... do 1k chunks in the hope that we won't kill the stack
#define MYBLOCK 1024
Bytef block[MYBLOCK];
int ret;
do {
zstream.avail_out = MYBLOCK;
zstream.next_out = block;
ret = inflate(&zstream, Z_NO_FLUSH);
if (ret != Z_STREAM_END && ret != Z_OK) {
ThrowException("Failure decompressing this file using gzip, seemingly it is NOT a compressed .XGL file");
}
const size_t have = MYBLOCK - zstream.avail_out;
total += have;
uncompressed.resize(total);
memcpy(uncompressed.data() + total - have, block, have);
} while (ret != Z_STREAM_END);
// terminate zlib
inflateEnd(&zstream);
// replace the input stream with a memory stream
stream.reset(new MemoryIOStream(reinterpret_cast<uint8_t *>(uncompressed.data()), total));
#endif
}
// parse the XML file
mXmlParser = new XmlParser;
if (!mXmlParser->parse(stream.get())) {
throw DeadlyImportError("XML parse error while loading XGL file ", pFile);
}
TempScope scope;
XmlNode *worldNode = mXmlParser->findNode("WORLD");
if (nullptr != worldNode) {
ReadWorld(*worldNode, scope);
}
std::vector<aiMesh *> &meshes = scope.meshes_linear;
std::vector<aiMaterial *> &materials = scope.materials_linear;
if (!meshes.size() || !materials.size()) {
ThrowException("failed to extract data from XGL file, no meshes loaded");
}
// copy meshes
m_scene->mNumMeshes = static_cast<unsigned int>(meshes.size());
m_scene->mMeshes = new aiMesh *[m_scene->mNumMeshes]();
std::copy(meshes.begin(), meshes.end(), m_scene->mMeshes);
// copy materials
m_scene->mNumMaterials = static_cast<unsigned int>(materials.size());
m_scene->mMaterials = new aiMaterial *[m_scene->mNumMaterials]();
std::copy(materials.begin(), materials.end(), m_scene->mMaterials);
if (scope.light) {
m_scene->mNumLights = 1;
m_scene->mLights = new aiLight *[1];
m_scene->mLights[0] = scope.light;
scope.light->mName = m_scene->mRootNode->mName;
}
scope.dismiss();
}
// ------------------------------------------------------------------------------------------------
void XGLImporter::ReadWorld(XmlNode &node, TempScope &scope) {
for (XmlNode &currentNode : node.children()) {
const std::string &s = ai_stdStrToLower(currentNode.name());
// XXX right now we'd skip <lighting> if it comes after
// <object> or <mesh>
if (s == "lighting") {
ReadLighting(currentNode, scope);
} else if (s == "object" || s == "mesh" || s == "mat") {
break;
}
}
aiNode *const nd = ReadObject(node, scope);
if (!nd) {
ThrowException("failure reading <world>");
}
if (!nd->mName.length) {
nd->mName.Set("WORLD");
}
m_scene->mRootNode = nd;
}
// ------------------------------------------------------------------------------------------------
void XGLImporter::ReadLighting(XmlNode &node, TempScope &scope) {
const std::string &s = ai_stdStrToLower(node.name());
if (s == "directionallight") {
scope.light = ReadDirectionalLight(node);
} else if (s == "ambient") {
LogWarn("ignoring <ambient> tag");
} else if (s == "spheremap") {
LogWarn("ignoring <spheremap> tag");
}
}
// ------------------------------------------------------------------------------------------------
aiLight *XGLImporter::ReadDirectionalLight(XmlNode &node) {
std::unique_ptr<aiLight> l(new aiLight());
l->mType = aiLightSource_DIRECTIONAL;
find_node_by_name_predicate predicate("directionallight");
XmlNode child = node.find_child(predicate);
if (child.empty()) {
return nullptr;
}
const std::string &s = ai_stdStrToLower(child.name());
if (s == "direction") {
l->mDirection = ReadVec3(child);
} else if (s == "diffuse") {
l->mColorDiffuse = ReadCol3(child);
} else if (s == "specular") {
l->mColorSpecular = ReadCol3(child);
}
return l.release();
}
// ------------------------------------------------------------------------------------------------
aiNode *XGLImporter::ReadObject(XmlNode &node, TempScope &scope) {
aiNode *nd = new aiNode;
std::vector<aiNode *> children;
std::vector<unsigned int> meshes;
try {
for (XmlNode &child : node.children()) {
const std::string &s = ai_stdStrToLower(child.name());
if (s == "mesh") {
const size_t prev = scope.meshes_linear.size();
if (ReadMesh(child, scope)) {
const size_t newc = scope.meshes_linear.size();
for (size_t i = 0; i < newc - prev; ++i) {
meshes.push_back(static_cast<unsigned int>(i + prev));
}
}
} else if (s == "mat") {
ReadMaterial(child, scope);
} else if (s == "object") {
children.push_back(ReadObject(child, scope));
} else if (s == "objectref") {
// XXX
} else if (s == "meshref") {
const unsigned int id = static_cast<unsigned int>(ReadIndexFromText(child));
std::multimap<unsigned int, aiMesh *>::iterator it = scope.meshes.find(id), end = scope.meshes.end();
if (it == end) {
ThrowException("<meshref> index out of range");
}
for (; it != end && (*it).first == id; ++it) {
// ok, this is n^2 and should get optimized one day
aiMesh *const m = it->second;
unsigned int i = 0, mcount = static_cast<unsigned int>(scope.meshes_linear.size());
for (; i < mcount; ++i) {
if (scope.meshes_linear[i] == m) {
meshes.push_back(i);
break;
}
}
ai_assert(i < mcount);
}
} else if (s == "transform") {
nd->mTransformation = ReadTrafo(child);
}
}
} catch (...) {
for (aiNode *ch : children) {
delete ch;
}
throw;
}
// FIX: since we used std::multimap<> to keep meshes by id, mesh order now depends on the behaviour
// of the multimap implementation with respect to the ordering of entries with same values.
// C++11 gives the guarantee that it uses insertion order, before it is implementation-specific.
// Sort by material id to always guarantee a deterministic result.
std::sort(meshes.begin(), meshes.end(), SortMeshByMaterialId(scope));
// link meshes to node
nd->mNumMeshes = static_cast<unsigned int>(meshes.size());
if (0 != nd->mNumMeshes) {
nd->mMeshes = new unsigned int[nd->mNumMeshes]();
for (unsigned int i = 0; i < nd->mNumMeshes; ++i) {
nd->mMeshes[i] = meshes[i];
}
}
// link children to parent
nd->mNumChildren = static_cast<unsigned int>(children.size());
if (nd->mNumChildren) {
nd->mChildren = new aiNode *[nd->mNumChildren]();
for (unsigned int i = 0; i < nd->mNumChildren; ++i) {
nd->mChildren[i] = children[i];
children[i]->mParent = nd;
}
}
return nd;
}
// ------------------------------------------------------------------------------------------------
aiMatrix4x4 XGLImporter::ReadTrafo(XmlNode &node) {
aiVector3D forward, up, right, position;
float scale = 1.0f;
aiMatrix4x4 m;
XmlNode child = node.child("TRANSFORM");
if (child.empty()) {
return m;
}
for (XmlNode &sub_child : child.children()) {
const std::string &s = ai_stdStrToLower(sub_child.name());
if (s == "forward") {
forward = ReadVec3(sub_child);
} else if (s == "up") {
up = ReadVec3(sub_child);
} else if (s == "position") {
position = ReadVec3(sub_child);
}
if (s == "scale") {
scale = ReadFloat(sub_child);
if (scale < 0.f) {
// this is wrong, but we can leave the value and pass it to the caller
LogError("found negative scaling in <transform>, ignoring");
}
}
}
if (forward.SquareLength() < 1e-4 || up.SquareLength() < 1e-4) {
LogError("A direction vector in <transform> is zero, ignoring trafo");
return m;
}
forward.Normalize();
up.Normalize();
right = forward ^ up;
if (std::fabs(up * forward) > 1e-4) {
// this is definitely wrong - a degenerate coordinate space ruins everything
// so substitute identity transform.
LogError("<forward> and <up> vectors in <transform> are skewing, ignoring trafo");
return m;
}
right *= scale;
up *= scale;
forward *= scale;
m.a1 = right.x;
m.b1 = right.y;
m.c1 = right.z;
m.a2 = up.x;
m.b2 = up.y;
m.c2 = up.z;
m.a3 = forward.x;
m.b3 = forward.y;
m.c3 = forward.z;
m.a4 = position.x;
m.b4 = position.y;
m.c4 = position.z;
return m;
}
// ------------------------------------------------------------------------------------------------
aiMesh *XGLImporter::ToOutputMesh(const TempMaterialMesh &m) {
std::unique_ptr<aiMesh> mesh(new aiMesh());
mesh->mNumVertices = static_cast<unsigned int>(m.positions.size());
mesh->mVertices = new aiVector3D[mesh->mNumVertices];
std::copy(m.positions.begin(), m.positions.end(), mesh->mVertices);
if (!m.normals.empty()) {
mesh->mNormals = new aiVector3D[mesh->mNumVertices];
std::copy(m.normals.begin(), m.normals.end(), mesh->mNormals);
}
if (!m.uvs.empty()) {
mesh->mNumUVComponents[0] = 2;
mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
mesh->mTextureCoords[0][i] = aiVector3D(m.uvs[i].x, m.uvs[i].y, 0.f);
}
}
mesh->mNumFaces = static_cast<unsigned int>(m.vcounts.size());
mesh->mFaces = new aiFace[m.vcounts.size()];
unsigned int idx = 0;
for (unsigned int i = 0; i < mesh->mNumFaces; ++i) {
aiFace &f = mesh->mFaces[i];
f.mNumIndices = m.vcounts[i];
f.mIndices = new unsigned int[f.mNumIndices];
for (unsigned int c = 0; c < f.mNumIndices; ++c) {
f.mIndices[c] = idx++;
}
}
ai_assert(idx == mesh->mNumVertices);
mesh->mPrimitiveTypes = m.pflags;
mesh->mMaterialIndex = m.matid;
return mesh.release();
}
// ------------------------------------------------------------------------------------------------
bool XGLImporter::ReadMesh(XmlNode &node, TempScope &scope) {
TempMesh t;
std::map<unsigned int, TempMaterialMesh> bymat;
const unsigned int mesh_id = ReadIDAttr(node);
for (XmlNode &child : node.children()) {
const std::string &s = ai_stdStrToLower(child.name());
if (s == "mat") {
ReadMaterial(child, scope);
} else if (s == "p") {
pugi::xml_attribute attr = child.attribute("ID");
if (attr.empty()) {
LogWarn("no ID attribute on <p>, ignoring");
} else {
int id = attr.as_int();
t.points[id] = ReadVec3(child);
}
} else if (s == "n") {
pugi::xml_attribute attr = child.attribute("ID");
if (attr.empty()) {
LogWarn("no ID attribute on <n>, ignoring");
} else {
int id = attr.as_int();
t.normals[id] = ReadVec3(child);
}
} else if (s == "tc") {
pugi::xml_attribute attr = child.attribute("ID");
if (attr.empty()) {
LogWarn("no ID attribute on <tc>, ignoring");
} else {
int id = attr.as_int();
t.uvs[id] = ReadVec2(child);
}
} else if (s == "f" || s == "l" || s == "p") {
const unsigned int vcount = s == "f" ? 3 : (s == "l" ? 2 : 1);
unsigned int mid = ~0u;
TempFace tf[3];
bool has[3] = { false };
for (XmlNode &sub_child : child.children()) {
const std::string &scn = ai_stdStrToLower(sub_child.name());
if (scn == "fv1" || scn == "lv1" || scn == "pv1") {
ReadFaceVertex(sub_child, t, tf[0]);
has[0] = true;
} else if (scn == "fv2" || scn == "lv2") {
ReadFaceVertex(sub_child, t, tf[1]);
has[1] = true;
} else if (scn == "fv3") {
ReadFaceVertex(sub_child, t, tf[2]);
has[2] = true;
} else if (scn == "mat") {
if (mid != ~0u) {
LogWarn("only one material tag allowed per <f>");
}
mid = ResolveMaterialRef(sub_child, scope);
} else if (scn == "matref") {
if (mid != ~0u) {
LogWarn("only one material tag allowed per <f>");
}
mid = ResolveMaterialRef(sub_child, scope);
}
}
if (mid == ~0u) {
ThrowException("missing material index");
}
bool nor = false;
bool uv = false;
for (unsigned int i = 0; i < vcount; ++i) {
if (!has[i]) {
ThrowException("missing face vertex data");
}
nor = nor || tf[i].has_normal;
uv = uv || tf[i].has_uv;
}
if (mid >= (1 << 30)) {
LogWarn("material indices exhausted, this may cause errors in the output");
}
unsigned int meshId = mid | ((nor ? 1 : 0) << 31) | ((uv ? 1 : 0) << 30);
TempMaterialMesh &mesh = bymat[meshId];
mesh.matid = mid;
for (unsigned int i = 0; i < vcount; ++i) {
mesh.positions.push_back(tf[i].pos);
if (nor) {
mesh.normals.push_back(tf[i].normal);
}
if (uv) {
mesh.uvs.push_back(tf[i].uv);
}
mesh.pflags |= 1 << (vcount - 1);
}
mesh.vcounts.push_back(vcount);
}
}
// finally extract output meshes and add them to the scope
using pairt = std::pair<const unsigned int, TempMaterialMesh>;
for (const pairt &p : bymat) {
aiMesh *const m = ToOutputMesh(p.second);
scope.meshes_linear.push_back(m);
// if this is a definition, keep it on the stack
if (mesh_id != ~0u) {
scope.meshes.insert(std::pair<unsigned int, aiMesh *>(mesh_id, m));
}
}
// no id == not a reference, insert this mesh right *here*
return mesh_id == ~0u;
}
// ----------------------------------------------------------------------------------------------
unsigned int XGLImporter::ResolveMaterialRef(XmlNode &node, TempScope &scope) {
const std::string &s = node.name();
if (s == "mat") {
ReadMaterial(node, scope);
return static_cast<unsigned int>(scope.materials_linear.size() - 1);
}
const int id = ReadIndexFromText(node);
auto it = scope.materials.find(id), end = scope.materials.end();
if (it == end) {
ThrowException("<matref> index out of range");
}
// ok, this is n^2 and should get optimized one day
aiMaterial *const m = it->second;
unsigned int i = 0, mcount = static_cast<unsigned int>(scope.materials_linear.size());
for (; i < mcount; ++i) {
if (scope.materials_linear[i] == m) {
return i;
}
}
ai_assert(false);
return 0;
}
// ------------------------------------------------------------------------------------------------
void XGLImporter::ReadMaterial(XmlNode &node, TempScope &scope) {
const unsigned int mat_id = ReadIDAttr(node);
auto *mat(new aiMaterial);
for (XmlNode &child : node.children()) {
const std::string &s = ai_stdStrToLower(child.name());
if (s == "amb") {
const aiColor3D c = ReadCol3(child);
mat->AddProperty(&c, 1, AI_MATKEY_COLOR_AMBIENT);
} else if (s == "diff") {
const aiColor3D c = ReadCol3(child);
mat->AddProperty(&c, 1, AI_MATKEY_COLOR_DIFFUSE);
} else if (s == "spec") {
const aiColor3D c = ReadCol3(child);
mat->AddProperty(&c, 1, AI_MATKEY_COLOR_SPECULAR);
} else if (s == "emiss") {
const aiColor3D c = ReadCol3(child);
mat->AddProperty(&c, 1, AI_MATKEY_COLOR_EMISSIVE);
} else if (s == "alpha") {
const float f = ReadFloat(child);
mat->AddProperty(&f, 1, AI_MATKEY_OPACITY);
} else if (s == "shine") {
const float f = ReadFloat(child);
mat->AddProperty(&f, 1, AI_MATKEY_SHININESS);
}
}
scope.materials[mat_id] = mat;
scope.materials_linear.push_back(mat);
}
// ----------------------------------------------------------------------------------------------
void XGLImporter::ReadFaceVertex(XmlNode &node, const TempMesh &t, TempFace &out) {
bool havep = false;
for (XmlNode &child : node.children()) {
const std::string &s = ai_stdStrToLower(child.name());
if (s == "pref") {
const unsigned int id = ReadIndexFromText(child);
std::map<unsigned int, aiVector3D>::const_iterator it = t.points.find(id);
if (it == t.points.end()) {
ThrowException("point index out of range");
}
out.pos = (*it).second;
havep = true;
} else if (s == "nref") {
const unsigned int id = ReadIndexFromText(child);
std::map<unsigned int, aiVector3D>::const_iterator it = t.normals.find(id);
if (it == t.normals.end()) {
ThrowException("normal index out of range");
}
out.normal = (*it).second;
out.has_normal = true;
} else if (s == "tcref") {
const unsigned int id = ReadIndexFromText(child);
std::map<unsigned int, aiVector2D>::const_iterator it = t.uvs.find(id);
if (it == t.uvs.end()) {
ThrowException("uv index out of range");
}
out.uv = (*it).second;
out.has_uv = true;
} else if (s == "p") {
out.pos = ReadVec3(child);
} else if (s == "n") {
out.normal = ReadVec3(child);
} else if (s == "tc") {
out.uv = ReadVec2(child);
}
}
if (!havep) {
ThrowException("missing <pref> in <fvN> element");
}
}
// ------------------------------------------------------------------------------------------------
unsigned int XGLImporter::ReadIDAttr(XmlNode &node) {
for (pugi::xml_attribute attr : node.attributes()) {
if (!ASSIMP_stricmp(attr.name(), "id")) {
return attr.as_int();
}
}
return ~0u;
}
// ------------------------------------------------------------------------------------------------
float XGLImporter::ReadFloat(XmlNode &node) {
std::string v;
XmlParser::getValueAsString(node, v);
const char *s = v.c_str(), *se;
if (!SkipSpaces(&s)) {
LogError("unexpected EOL, failed to parse index element");
return 0.f;
}
float t;
se = fast_atoreal_move(s, t);
if (se == s) {
LogError("failed to read float text");
return 0.f;
}
return t;
}
// ------------------------------------------------------------------------------------------------
unsigned int XGLImporter::ReadIndexFromText(XmlNode &node) {
std::string v;
XmlParser::getValueAsString(node, v);
const char *s = v.c_str();
if (!SkipSpaces(&s)) {
LogError("unexpected EOL, failed to parse index element");
return ~0u;
}
const char *se;
const unsigned int t = strtoul10(s, &se);
if (se == s) {
LogError("failed to read index");
return ~0u;
}
return t;
}
// ------------------------------------------------------------------------------------------------
aiVector2D XGLImporter::ReadVec2(XmlNode &node) {
aiVector2D vec;
std::string val;
XmlParser::getValueAsString(node, val);
const char *s = val.c_str();
ai_real v[2];
for (int i = 0; i < 2; ++i) {
if (!SkipSpaces(&s)) {
LogError("unexpected EOL, failed to parse vec2");
return vec;
}
v[i] = fast_atof(&s);
SkipSpaces(&s);
if (i != 1 && *s != ',') {
LogError("expected comma, failed to parse vec2");
return vec;
}
++s;
}
vec.x = v[0];
vec.y = v[1];
return vec;
}
// ------------------------------------------------------------------------------------------------
aiVector3D XGLImporter::ReadVec3(XmlNode &node) {
aiVector3D vec;
std::string v;
XmlParser::getValueAsString(node, v);
const char *s = v.c_str();
for (int i = 0; i < 3; ++i) {
if (!SkipSpaces(&s)) {
LogError("unexpected EOL, failed to parse vec3");
return vec;
}
vec[i] = fast_atof(&s);
SkipSpaces(&s);
if (i != 2 && *s != ',') {
LogError("expected comma, failed to parse vec3");
return vec;
}
++s;
}
return vec;
}
// ------------------------------------------------------------------------------------------------
aiColor3D XGLImporter::ReadCol3(XmlNode &node) {
const aiVector3D &v = ReadVec3(node);
if (v.x < 0.f || v.x > 1.0f || v.y < 0.f || v.y > 1.0f || v.z < 0.f || v.z > 1.0f) {
LogWarn("color values out of range, ignoring");
}
return aiColor3D(v.x, v.y, v.z);
}
#endif
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