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assimp/code/AssetLib/SMD/SMDLoader.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2024, 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 SMDLoader.cpp
* @brief Implementation of the SMD importer class
*/
#ifndef ASSIMP_BUILD_NO_SMD_IMPORTER
#include <assimp/fast_atof.h>
#include <assimp/SkeletonMeshBuilder.h>
#include <assimp/Importer.hpp>
#include <assimp/IOSystem.hpp>
#include <assimp/scene.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/importerdesc.h>
#include <memory>
#include <assimp/DefaultIOSystem.h>
#include <tuple>
// internal headers
#include "SMDLoader.h"
#ifndef _MSC_VER
#define strtok_s strtok_r
#endif
namespace Assimp {
static constexpr aiImporterDesc desc = {
"Valve SMD Importer",
"",
"",
"",
aiImporterFlags_SupportTextFlavour,
0,
0,
0,
0,
"smd vta"
};
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
SMDImporter::SMDImporter() :
configFrameID(),
mBuffer(),
mEnd(nullptr),
pScene(nullptr),
iFileSize( 0 ),
iSmallestFrame( INT_MAX ),
dLengthOfAnim( 0.0 ),
bHasUVs(false ),
iLineNumber((unsigned int)-1) {
// empty
}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool SMDImporter::CanRead( const std::string& filename, IOSystem* /*pIOHandler*/, bool) const {
return SimpleExtensionCheck(filename, "smd", "vta");
}
// ------------------------------------------------------------------------------------------------
// Get a list of all supported file extensions
const aiImporterDesc* SMDImporter::GetInfo () const {
return &desc;
}
// ------------------------------------------------------------------------------------------------
// Setup configuration properties
void SMDImporter::SetupProperties(const Importer* pImp) {
// The
// AI_CONFIG_IMPORT_SMD_KEYFRAME option overrides the
// AI_CONFIG_IMPORT_GLOBAL_KEYFRAME option.
configFrameID = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_SMD_KEYFRAME,-1);
if(static_cast<unsigned int>(-1) == configFrameID) {
configFrameID = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_GLOBAL_KEYFRAME,0);
}
bLoadAnimationList = pImp->GetPropertyBool(AI_CONFIG_IMPORT_SMD_LOAD_ANIMATION_LIST, true);
noSkeletonMesh = pImp->GetPropertyBool(AI_CONFIG_IMPORT_NO_SKELETON_MESHES, false);
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void SMDImporter::InternReadFile( const std::string& pFile, aiScene* scene, IOSystem* pIOHandler) {
this->pScene = scene;
ReadSmd(pFile, pIOHandler);
// If there are no triangles it seems to be an animation SMD,
// containing only the animation skeleton.
if (asTriangles.empty()) {
if (asBones.empty()) {
throw DeadlyImportError("SMD: No triangles and no bones have "
"been found in the file. This file seems to be invalid.");
}
// Set the flag in the scene structure which indicates
// that there is nothing than an animation skeleton
pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
}
if (!asBones.empty()) {
// Check whether all bones have been initialized
for (const auto &asBone : asBones) {
if (!asBone.mName.length()) {
ASSIMP_LOG_WARN("SMD: Not all bones have been initialized");
break;
}
}
// now fix invalid time values and make sure the animation starts at frame 0
FixTimeValues();
}
// build output nodes (bones are added as empty dummy nodes)
CreateOutputNodes();
if (!(pScene->mFlags & AI_SCENE_FLAGS_INCOMPLETE)) {
// create output meshes
CreateOutputMeshes();
// build an output material list
CreateOutputMaterials();
// use root node that renders all meshes
pScene->mRootNode->mNumMeshes = pScene->mNumMeshes;
pScene->mRootNode->mMeshes = new unsigned int[pScene->mNumMeshes];
for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
pScene->mRootNode->mMeshes[i] = i;
}
}
// build the output animation
CreateOutputAnimations(pFile, pIOHandler);
if ((pScene->mFlags & AI_SCENE_FLAGS_INCOMPLETE) && !noSkeletonMesh) {
SkeletonMeshBuilder skeleton(pScene);
}
}
// ------------------------------------------------------------------------------------------------
// Write an error message with line number to the log file
void SMDImporter::LogErrorNoThrow(const char* msg) {
const size_t _BufferSize = 1024;
char szTemp[_BufferSize];
ai_snprintf(szTemp,_BufferSize,"Line %u: %s",iLineNumber,msg);
DefaultLogger::get()->error(szTemp);
}
// ------------------------------------------------------------------------------------------------
// Write a warning with line number to the log file
void SMDImporter::LogWarning(const char* msg) {
const size_t _BufferSize = 1024;
char szTemp[_BufferSize];
ai_assert(strlen(msg) < 1000);
ai_snprintf(szTemp,_BufferSize,"Line %u: %s",iLineNumber,msg);
ASSIMP_LOG_WARN(szTemp);
}
// ------------------------------------------------------------------------------------------------
// Fix invalid time values in the file
void SMDImporter::FixTimeValues() {
double dDelta = (double)iSmallestFrame;
double dMax = 0.0f;
for (auto &asBone : asBones) {
for (auto &asKey : asBone.sAnim.asKeys) {
asKey.dTime -= dDelta;
dMax = std::max(dMax, asKey.dTime);
}
}
dLengthOfAnim = dMax;
}
// ------------------------------------------------------------------------------------------------
// create output meshes
void SMDImporter::CreateOutputMeshes() {
if (aszTextures.empty()) {
aszTextures.emplace_back();
}
// we need to sort all faces by their material index
// in opposition to other loaders we can be sure that each
// material is at least used once.
pScene->mNumMeshes = (unsigned int) aszTextures.size();
pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
typedef std::vector<unsigned int> FaceList;
std::unique_ptr<FaceList[]> aaiFaces(new FaceList[pScene->mNumMeshes]);
// approximate the space that will be required
unsigned int iNum = (unsigned int)asTriangles.size() / pScene->mNumMeshes;
iNum += iNum >> 1;
for (unsigned int i = 0; i < pScene->mNumMeshes;++i) {
aaiFaces[i].reserve(iNum);
}
// collect all faces
iNum = 0;
for (const auto &asTriangle : asTriangles) {
if (asTriangle.iTexture >= aszTextures.size()) {
ASSIMP_LOG_INFO("[SMD/VTA] Material index overflow in face");
aaiFaces[asTriangle.iTexture].push_back((unsigned int)aszTextures.size()-1);
} else {
aaiFaces[asTriangle.iTexture].push_back(iNum);
}
++iNum;
}
// now create the output meshes
for (unsigned int i = 0; i < pScene->mNumMeshes;++i) {
aiMesh*& pcMesh = pScene->mMeshes[i] = new aiMesh();
ai_assert(!aaiFaces[i].empty()); // should not be empty ...
pcMesh->mPrimitiveTypes = aiPrimitiveType_TRIANGLE;
pcMesh->mNumVertices = (unsigned int)aaiFaces[i].size()*3;
pcMesh->mNumFaces = (unsigned int)aaiFaces[i].size();
pcMesh->mMaterialIndex = i;
// storage for bones
typedef std::pair<unsigned int,float> TempWeightListEntry;
typedef std::vector< TempWeightListEntry > TempBoneWeightList;
std::unique_ptr<TempBoneWeightList[]> aaiBones(new TempBoneWeightList[asBones.size()]());
// try to reserve enough memory without wasting too much
for (unsigned int iBone = 0; iBone < asBones.size();++iBone) {
aaiBones[iBone].reserve(pcMesh->mNumVertices/asBones.size());
}
// allocate storage
pcMesh->mFaces = new aiFace[pcMesh->mNumFaces];
aiVector3D* pcNormals = pcMesh->mNormals = new aiVector3D[pcMesh->mNumVertices];
aiVector3D* pcVerts = pcMesh->mVertices = new aiVector3D[pcMesh->mNumVertices];
aiVector3D* pcUVs = nullptr;
if (bHasUVs) {
pcUVs = pcMesh->mTextureCoords[0] = new aiVector3D[pcMesh->mNumVertices];
pcMesh->mNumUVComponents[0] = 2;
}
iNum = 0;
for (unsigned int iFace = 0; iFace < pcMesh->mNumFaces;++iFace) {
pcMesh->mFaces[iFace].mIndices = new unsigned int[3];
pcMesh->mFaces[iFace].mNumIndices = 3;
// fill the vertices
unsigned int iSrcFace = aaiFaces[i][iFace];
SMD::Face& face = asTriangles[iSrcFace];
*pcVerts++ = face.avVertices[0].pos;
*pcVerts++ = face.avVertices[1].pos;
*pcVerts++ = face.avVertices[2].pos;
// fill the normals
*pcNormals++ = face.avVertices[0].nor;
*pcNormals++ = face.avVertices[1].nor;
*pcNormals++ = face.avVertices[2].nor;
// fill the texture coordinates
if (pcUVs) {
*pcUVs++ = face.avVertices[0].uv;
*pcUVs++ = face.avVertices[1].uv;
*pcUVs++ = face.avVertices[2].uv;
}
for (unsigned int iVert = 0; iVert < 3;++iVert) {
float fSum = 0.0f;
for (unsigned int iBone = 0;iBone < face.avVertices[iVert].aiBoneLinks.size();++iBone) {
TempWeightListEntry& pairval = face.avVertices[iVert].aiBoneLinks[iBone];
// FIX: The second check is here just to make sure we won't
// assign more than one weight to a single vertex index
if (pairval.first >= asBones.size() || pairval.first == face.avVertices[iVert].iParentNode) {
ASSIMP_LOG_ERROR("[SMD/VTA] Bone index overflow. "
"The bone index will be ignored, the weight will be assigned "
"to the vertex' parent node");
continue;
}
aaiBones[pairval.first].emplace_back(iNum,pairval.second);
fSum += pairval.second;
}
// ******************************************************************
// If the sum of all vertex weights is not 1.0 we must assign
// the rest to the vertex' parent node. Well, at least the doc says
// we should ...
// FIX: We use 0.975 as limit, floating-point inaccuracies seem to
// be very strong in some SMD exporters. Furthermore it is possible
// that the parent of a vertex is 0xffffffff (if the corresponding
// entry in the file was unreadable)
// ******************************************************************
if (fSum < 0.975f && face.avVertices[iVert].iParentNode != UINT_MAX) {
if (face.avVertices[iVert].iParentNode >= asBones.size()) {
ASSIMP_LOG_ERROR("[SMD/VTA] Bone index overflow. "
"The index of the vertex parent bone is invalid. "
"The remaining weights will be normalized to 1.0");
if (fSum) {
fSum = 1 / fSum;
for (auto &pairval : face.avVertices[iVert].aiBoneLinks) {
if (pairval.first >= asBones.size()) {
continue;
}
aaiBones[pairval.first].back().second *= fSum;
}
}
} else {
aaiBones[face.avVertices[iVert].iParentNode].emplace_back(iNum,1.0f-fSum);
}
}
pcMesh->mFaces[iFace].mIndices[iVert] = iNum++;
}
}
// now build all bones of the mesh
iNum = 0;
for (unsigned int iBone = 0; iBone < asBones.size();++iBone) {
if (!aaiBones[iBone].empty())++iNum;
}
if (iNum) {
pcMesh->mNumBones = iNum;
pcMesh->mBones = new aiBone*[pcMesh->mNumBones];
iNum = 0;
for (unsigned int iBone = 0; iBone < asBones.size();++iBone) {
if (aaiBones[iBone].empty()) {
continue;
}
aiBone*& bone = pcMesh->mBones[iNum] = new aiBone();
bone->mNumWeights = (unsigned int)aaiBones[iBone].size();
bone->mWeights = new aiVertexWeight[bone->mNumWeights];
bone->mOffsetMatrix = asBones[iBone].mOffsetMatrix;
bone->mName.Set( asBones[iBone].mName );
asBones[iBone].bIsUsed = true;
for (unsigned int iWeight = 0; iWeight < bone->mNumWeights;++iWeight) {
bone->mWeights[iWeight].mVertexId = aaiBones[iBone][iWeight].first;
bone->mWeights[iWeight].mWeight = aaiBones[iBone][iWeight].second;
}
++iNum;
}
}
}
}
// ------------------------------------------------------------------------------------------------
// add bone child nodes
void SMDImporter::AddBoneChildren(aiNode* pcNode, uint32_t iParent) {
ai_assert( nullptr != pcNode );
ai_assert( 0 == pcNode->mNumChildren );
ai_assert( nullptr == pcNode->mChildren);
// first count ...
for (auto &bone : asBones) {
if (bone.iParent == iParent) {
++pcNode->mNumChildren;
}
}
// now allocate the output array
pcNode->mChildren = new aiNode*[pcNode->mNumChildren];
// and fill all subnodes
unsigned int qq( 0 );
for (unsigned int i = 0; i < asBones.size();++i) {
SMD::Bone& bone = asBones[i];
if (bone.iParent != iParent) {
continue;
}
aiNode* pc = pcNode->mChildren[qq++] = new aiNode();
pc->mName.Set(bone.mName);
// store the local transformation matrix of the bind pose
if (bone.sAnim.asKeys.size()) {
pc->mTransformation = bone.sAnim.asKeys[0].matrix;
}
if (bone.iParent == static_cast<uint32_t>(-1)) {
bone.mOffsetMatrix = pc->mTransformation;
} else {
bone.mOffsetMatrix = asBones[bone.iParent].mOffsetMatrix * pc->mTransformation;
}
pc->mParent = pcNode;
// add children to this node, too
AddBoneChildren(pc,i);
}
}
// ------------------------------------------------------------------------------------------------
// create output nodes
void SMDImporter::CreateOutputNodes() {
pScene->mRootNode = new aiNode();
// now add all bones as dummy sub nodes to the graph
AddBoneChildren(pScene->mRootNode,(uint32_t)-1);
for (auto &bone : asBones) {
bone.mOffsetMatrix.Inverse();
}
// if we have only one bone we can even remove the root node
if (pScene->mFlags & AI_SCENE_FLAGS_INCOMPLETE && 1 == pScene->mRootNode->mNumChildren) {
aiNode* pcOldRoot = pScene->mRootNode;
pScene->mRootNode = pcOldRoot->mChildren[0];
pcOldRoot->mChildren[0] = nullptr;
delete pcOldRoot;
pScene->mRootNode->mParent = nullptr;
}
else
{
::strcpy(pScene->mRootNode->mName.data, "<SMD_root>");
pScene->mRootNode->mName.length = 10;
}
}
// ------------------------------------------------------------------------------------------------
// create output animations
void SMDImporter::CreateOutputAnimations(const std::string &pFile, IOSystem* pIOHandler) {
std::vector<std::tuple<std::string, std::string>> animFileList;
if (bLoadAnimationList) {
GetAnimationFileList(pFile, pIOHandler, animFileList);
}
int animCount = static_cast<int>( animFileList.size() + 1u );
pScene->mNumAnimations = 1;
pScene->mAnimations = new aiAnimation*[animCount];
memset(pScene->mAnimations, 0, sizeof(aiAnimation*)*animCount);
CreateOutputAnimation(0, "");
for (auto &animFile : animFileList) {
ReadSmd(std::get<1>(animFile), pIOHandler);
if (asBones.empty()) {
continue;
}
FixTimeValues();
CreateOutputAnimation(pScene->mNumAnimations++, std::get<0>(animFile));
}
}
void SMDImporter::CreateOutputAnimation(int index, const std::string &name) {
aiAnimation*& anim = pScene->mAnimations[index] = new aiAnimation();
if (name.length()) {
anim->mName.Set(name.c_str());
}
anim->mDuration = dLengthOfAnim;
anim->mNumChannels = static_cast<unsigned int>( asBones.size() );
anim->mTicksPerSecond = 25.0; // FIXME: is this correct?
aiNodeAnim** pp = anim->mChannels = new aiNodeAnim*[anim->mNumChannels];
// now build valid keys
unsigned int a = 0;
for (const auto &asBone : asBones) {
aiNodeAnim* p = pp[a] = new aiNodeAnim();
// copy the name of the bone
p->mNodeName.Set(asBone.mName);
p->mNumRotationKeys = (unsigned int)asBone.sAnim.asKeys.size();
if (p->mNumRotationKeys){
p->mNumPositionKeys = p->mNumRotationKeys;
aiVectorKey* pVecKeys = p->mPositionKeys = new aiVectorKey[p->mNumRotationKeys];
aiQuatKey* pRotKeys = p->mRotationKeys = new aiQuatKey[p->mNumRotationKeys];
for (const auto &asKey : asBone.sAnim.asKeys) {
pRotKeys->mTime = pVecKeys->mTime = asKey.dTime;
// compute the rotation quaternion from the euler angles
// aiQuaternion: The order of the parameters is yzx?
pRotKeys->mValue = aiQuaternion(asKey.vRot.y, asKey.vRot.z, asKey.vRot.x);
pVecKeys->mValue = asKey.vPos;
++pVecKeys; ++pRotKeys;
}
}
++a;
// there are no scaling keys ...
}
}
void SMDImporter::GetAnimationFileList(const std::string &pFile, IOSystem* pIOHandler, std::vector<std::tuple<std::string, std::string>>& outList) {
auto base = DefaultIOSystem::absolutePath(pFile);
auto name = DefaultIOSystem::completeBaseName(pFile);
auto path = base + "/" + name + "_animation.txt";
std::unique_ptr<IOStream> file(pIOHandler->Open(path.c_str(), "rb"));
if (file == nullptr) {
return;
}
// Allocate storage and copy the contents of the file to a memory buffer
std::vector<char> buf;
size_t fileSize = file->FileSize();
buf.resize(fileSize + 1);
TextFileToBuffer(file.get(), buf);
/*
*_animation.txt format:
name path
idle idle.smd
jump anim/jump.smd
walk.smd
...
*/
std::string animName, animPath;
char *tok1, *tok2;
char *context1, *context2;
tok1 = strtok_s(&buf[0], "\r\n", &context1);
while (tok1 != nullptr) {
tok2 = strtok_s(tok1, " \t", &context2);
if (tok2) {
char *p = tok2;
tok2 = strtok_s(nullptr, " \t", &context2);
if (tok2) {
animPath = tok2;
animName = p;
} else {
// No name
animPath = p;
animName = DefaultIOSystem::completeBaseName(animPath);
}
outList.emplace_back(animName, base + "/" + animPath);
}
tok1 = strtok_s(nullptr, "\r\n", &context1);
}
}
// ------------------------------------------------------------------------------------------------
// create output materials
void SMDImporter::CreateOutputMaterials() {
ai_assert( nullptr != pScene );
pScene->mNumMaterials = (unsigned int)aszTextures.size();
pScene->mMaterials = new aiMaterial*[std::max(1u, pScene->mNumMaterials)];
for (unsigned int iMat = 0; iMat < pScene->mNumMaterials; ++iMat) {
aiMaterial* pcMat = new aiMaterial();
ai_assert( nullptr != pcMat );
pScene->mMaterials[iMat] = pcMat;
aiString szName;
szName.length = static_cast<ai_uint32>(ai_snprintf(szName.data, AI_MAXLEN, "Texture_%u", iMat));
pcMat->AddProperty(&szName,AI_MATKEY_NAME);
if (aszTextures[iMat].length())
{
::strncpy(szName.data, aszTextures[iMat].c_str(), AI_MAXLEN - 1);
szName.length = static_cast<ai_uint32>( aszTextures[iMat].length() );
pcMat->AddProperty(&szName,AI_MATKEY_TEXTURE_DIFFUSE(0));
}
}
// create a default material if necessary
if (0 == pScene->mNumMaterials) {
pScene->mNumMaterials = 1;
aiMaterial* pcHelper = new aiMaterial();
pScene->mMaterials[0] = pcHelper;
int iMode = static_cast<int>(aiShadingMode_Gouraud);
pcHelper->AddProperty<int>(&iMode, 1, AI_MATKEY_SHADING_MODEL);
aiColor3D clr;
clr.b = clr.g = clr.r = 0.7f;
pcHelper->AddProperty<aiColor3D>(&clr, 1,AI_MATKEY_COLOR_DIFFUSE);
pcHelper->AddProperty<aiColor3D>(&clr, 1,AI_MATKEY_COLOR_SPECULAR);
clr.b = clr.g = clr.r = 0.05f;
pcHelper->AddProperty<aiColor3D>(&clr, 1,AI_MATKEY_COLOR_AMBIENT);
aiString szName;
szName.Set(AI_DEFAULT_MATERIAL_NAME);
pcHelper->AddProperty(&szName,AI_MATKEY_NAME);
}
}
// ------------------------------------------------------------------------------------------------
// Parse the file
void SMDImporter::ParseFile() {
const char* szCurrent = &mBuffer[0];
// read line per line ...
for ( ;; ) {
if(!SkipSpacesAndLineEnd(szCurrent,&szCurrent, mEnd)) {
break;
}
// "version <n> \n", <n> should be 1 for hl and hl2 SMD files
if (TokenMatch(szCurrent,"version",7)) {
if(!SkipSpaces(szCurrent,&szCurrent, mEnd)) break;
if (1 != strtoul10(szCurrent,&szCurrent)) {
ASSIMP_LOG_WARN("SMD.version is not 1. This "
"file format is not known. Continuing happily ...");
}
continue;
}
// "nodes\n" - Starts the node section
if (TokenMatch(szCurrent,"nodes",5)) {
ParseNodesSection(szCurrent, &szCurrent, mEnd);
continue;
}
// "triangles\n" - Starts the triangle section
if (TokenMatch(szCurrent,"triangles",9)) {
ParseTrianglesSection(szCurrent, &szCurrent, mEnd);
continue;
}
// "vertexanimation\n" - Starts the vertex animation section
if (TokenMatch(szCurrent,"vertexanimation",15)) {
bHasUVs = false;
ParseVASection(szCurrent, &szCurrent, mEnd);
continue;
}
// "skeleton\n" - Starts the skeleton section
if (TokenMatch(szCurrent,"skeleton",8)) {
ParseSkeletonSection(szCurrent, &szCurrent, mEnd);
continue;
}
SkipLine(szCurrent, &szCurrent, mEnd);
}
}
void SMDImporter::ReadSmd(const std::string &pFile, IOSystem* pIOHandler) {
std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));
// Check whether we can read from the file
if (file == nullptr) {
throw DeadlyImportError("Failed to open SMD/VTA file ", pFile, ".");
}
iFileSize = (unsigned int)file->FileSize();
// Allocate storage and copy the contents of the file to a memory buffer
mBuffer.resize(iFileSize + 1);
TextFileToBuffer(file.get(), mBuffer);
mEnd = &mBuffer[mBuffer.size() - 1] + 1;
iSmallestFrame = INT_MAX;
bHasUVs = true;
iLineNumber = 1;
// Reserve enough space for ... hm ... 10 textures
aszTextures.reserve(10);
// Reserve enough space for ... hm ... 1000 triangles
asTriangles.reserve(1000);
// Reserve enough space for ... hm ... 20 bones
asBones.reserve(20);
aszTextures.clear();
asTriangles.clear();
asBones.clear();
// parse the file ...
ParseFile();
}
// ------------------------------------------------------------------------------------------------
unsigned int SMDImporter::GetTextureIndex(const std::string& filename) {
unsigned int iIndex = 0;
for (std::vector<std::string>::const_iterator
i = aszTextures.begin();
i != aszTextures.end();++i,++iIndex) {
// case-insensitive ... it's a path
if (0 == ASSIMP_stricmp ( filename.c_str(),(*i).c_str())) {
return iIndex;
}
}
iIndex = (unsigned int)aszTextures.size();
aszTextures.push_back(filename);
return iIndex;
}
// ------------------------------------------------------------------------------------------------
// Parse the nodes section of the file
void SMDImporter::ParseNodesSection(const char* szCurrent, const char** szCurrentOut, const char *end) {
for ( ;; ) {
// "end\n" - Ends the nodes section
if (0 == ASSIMP_strincmp(szCurrent, "end", 3) && IsSpaceOrNewLine(*(szCurrent+3))) {
szCurrent += 4;
break;
}
ParseNodeInfo(szCurrent,&szCurrent, end);
}
SkipSpacesAndLineEnd(szCurrent, &szCurrent, end);
*szCurrentOut = szCurrent;
}
// ------------------------------------------------------------------------------------------------
// Parse the triangles section of the file
void SMDImporter::ParseTrianglesSection(const char *szCurrent, const char **szCurrentOut, const char *end) {
// Parse a triangle, parse another triangle, parse the next triangle ...
// and so on until we reach a token that looks quite similar to "end"
for ( ;; ) {
if(!SkipSpacesAndLineEnd(szCurrent,&szCurrent, end)) {
break;
}
// "end\n" - Ends the triangles section
if (TokenMatch(szCurrent,"end",3)) {
break;
}
ParseTriangle(szCurrent,&szCurrent, end);
}
SkipSpacesAndLineEnd(szCurrent,&szCurrent, end);
*szCurrentOut = szCurrent;
}
// ------------------------------------------------------------------------------------------------
// Parse the vertex animation section of the file
void SMDImporter::ParseVASection(const char *szCurrent, const char **szCurrentOut, const char *end) {
unsigned int iCurIndex = 0;
for ( ;; ) {
if (!SkipSpacesAndLineEnd(szCurrent,&szCurrent, end)) {
break;
}
// "end\n" - Ends the "vertexanimation" section
if (TokenMatch(szCurrent,"end",3)) {
break;
}
// "time <n>\n"
if (TokenMatch(szCurrent,"time",4)) {
// NOTE: The doc says that time values COULD be negative ...
// NOTE2: this is the shape key -> valve docs
int iTime = 0;
if (!ParseSignedInt(szCurrent, &szCurrent, end, iTime) || configFrameID != (unsigned int)iTime) {
break;
}
SkipLine(szCurrent,&szCurrent, end);
} else {
if(0 == iCurIndex) {
asTriangles.emplace_back();
}
if (++iCurIndex == 3) {
iCurIndex = 0;
}
ParseVertex(szCurrent,&szCurrent, end, asTriangles.back().avVertices[iCurIndex],true);
}
}
if (iCurIndex != 2 && !asTriangles.empty()) {
// we want to no degenerates, so throw this triangle away
asTriangles.pop_back();
}
SkipSpacesAndLineEnd(szCurrent,&szCurrent, end);
*szCurrentOut = szCurrent;
}
// ------------------------------------------------------------------------------------------------
// Parse the skeleton section of the file
void SMDImporter::ParseSkeletonSection(const char *szCurrent, const char **szCurrentOut, const char *end) {
int iTime = 0;
for ( ;; ) {
if (!SkipSpacesAndLineEnd(szCurrent,&szCurrent, end)) {
break;
}
// "end\n" - Ends the skeleton section
if (TokenMatch(szCurrent,"end",3)) {
break;
} else if (TokenMatch(szCurrent,"time",4)) {
// "time <n>\n" - Specifies the current animation frame
if (!ParseSignedInt(szCurrent, &szCurrent, end, iTime)) {
break;
}
iSmallestFrame = std::min(iSmallestFrame,iTime);
SkipLine(szCurrent, &szCurrent, end);
} else {
ParseSkeletonElement(szCurrent, &szCurrent, end, iTime);
}
}
*szCurrentOut = szCurrent;
}
// ------------------------------------------------------------------------------------------------
#define SMDI_PARSE_RETURN { \
SkipLine(szCurrent,&szCurrent, end); \
*szCurrentOut = szCurrent; \
return; \
}
// ------------------------------------------------------------------------------------------------
// Parse a node line
void SMDImporter::ParseNodeInfo(const char *szCurrent, const char **szCurrentOut, const char *end) {
unsigned int iBone = 0;
SkipSpacesAndLineEnd(szCurrent, &szCurrent, end);
if ( !ParseUnsignedInt(szCurrent, &szCurrent, end, iBone) || !SkipSpaces(szCurrent,&szCurrent, end)) {
throw DeadlyImportError("Unexpected EOF/EOL while parsing bone index");
}
if (iBone == UINT_MAX) {
LogErrorNoThrow("Invalid bone number while parsing bone index");
SMDI_PARSE_RETURN;
}
// add our bone to the list
if (iBone >= asBones.size()) {
asBones.resize(iBone+1);
}
SMD::Bone& bone = asBones[iBone];
bool bQuota = true;
if ('\"' != *szCurrent) {
LogWarning("Bone name is expected to be enclosed in "
"double quotation marks. ");
bQuota = false;
} else {
++szCurrent;
}
const char* szEnd = szCurrent;
for ( ;; ) {
if (bQuota && '\"' == *szEnd) {
iBone = (unsigned int)(szEnd - szCurrent);
++szEnd;
break;
} else if (!bQuota && IsSpaceOrNewLine(*szEnd)) {
iBone = (unsigned int)(szEnd - szCurrent);
break;
} else if (!(*szEnd)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone name");
SMDI_PARSE_RETURN;
}
++szEnd;
}
bone.mName = std::string(szCurrent,iBone);
szCurrent = szEnd;
// the only negative bone parent index that could occur is -1 AFAIK
if(!ParseSignedInt(szCurrent, &szCurrent, end, (int&)bone.iParent)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone parent index. Assuming -1");
SMDI_PARSE_RETURN;
}
// go to the beginning of the next line
SMDI_PARSE_RETURN;
}
// ------------------------------------------------------------------------------------------------
// Parse a skeleton element
void SMDImporter::ParseSkeletonElement(const char *szCurrent, const char **szCurrentOut, const char *end, int iTime) {
aiVector3D vPos;
aiVector3D vRot;
unsigned int iBone = 0;
if (!ParseUnsignedInt(szCurrent, &szCurrent, end, iBone)) {
ASSIMP_LOG_ERROR("Unexpected EOF/EOL while parsing bone index");
SMDI_PARSE_RETURN;
}
if (iBone >= asBones.size()) {
LogErrorNoThrow("Bone index in skeleton section is out of range");
SMDI_PARSE_RETURN;
}
SMD::Bone& bone = asBones[iBone];
bone.sAnim.asKeys.emplace_back();
SMD::Bone::Animation::MatrixKey& key = bone.sAnim.asKeys.back();
key.dTime = (double)iTime;
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vPos.x)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.pos.x");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vPos.y)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.pos.y");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vPos.z)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.pos.z");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vRot.x)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.rot.x");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vRot.y)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.rot.y");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vRot.z)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing bone.rot.z");
SMDI_PARSE_RETURN;
}
// build the transformation matrix of the key
key.matrix.FromEulerAnglesXYZ(vRot.x,vRot.y,vRot.z); {
aiMatrix4x4 mTemp;
mTemp.a4 = vPos.x;
mTemp.b4 = vPos.y;
mTemp.c4 = vPos.z;
key.matrix = mTemp * key.matrix;
}
key.vPos = vPos;
key.vRot = vRot;
// go to the beginning of the next line
SMDI_PARSE_RETURN;
}
// ------------------------------------------------------------------------------------------------
// Parse a triangle
void SMDImporter::ParseTriangle(const char *szCurrent, const char **szCurrentOut, const char *end) {
asTriangles.emplace_back();
SMD::Face& face = asTriangles.back();
if(!SkipSpaces(szCurrent, &szCurrent, end)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing a triangle");
return;
}
// read the texture file name
const char* szLast = szCurrent;
while (!IsSpaceOrNewLine(*++szCurrent));
// ... and get the index that belongs to this file name
face.iTexture = GetTextureIndex(std::string(szLast,(uintptr_t)szCurrent-(uintptr_t)szLast));
SkipSpacesAndLineEnd(szCurrent, &szCurrent, end);
// load three vertices
for (auto &avVertex : face.avVertices) {
ParseVertex(szCurrent, &szCurrent, end, avVertex);
}
*szCurrentOut = szCurrent;
}
// ------------------------------------------------------------------------------------------------
// Parse a float
bool SMDImporter::ParseFloat(const char *szCurrent, const char **szCurrentOut, const char *end, float &out) {
if (!SkipSpaces(&szCurrent, end)) {
return false;
}
*szCurrentOut = fast_atoreal_move<float>(szCurrent,out);
return true;
}
// ------------------------------------------------------------------------------------------------
// Parse an unsigned int
bool SMDImporter::ParseUnsignedInt(const char *szCurrent, const char **szCurrentOut, const char *end, unsigned int &out) {
if(!SkipSpaces(&szCurrent, end)) {
return false;
}
out = strtoul10(szCurrent,szCurrentOut);
return true;
}
// ------------------------------------------------------------------------------------------------
// Parse a signed int
bool SMDImporter::ParseSignedInt(const char *szCurrent, const char **szCurrentOut, const char *end, int &out) {
if(!SkipSpaces(&szCurrent, end)) {
return false;
}
out = strtol10(szCurrent,szCurrentOut);
return true;
}
// ------------------------------------------------------------------------------------------------
// Parse a vertex
void SMDImporter::ParseVertex(const char* szCurrent,
const char **szCurrentOut, const char *end, SMD::Vertex &vertex,
bool bVASection /*= false*/) {
if (SkipSpaces(&szCurrent, end) && IsLineEnd(*szCurrent)) {
SkipSpacesAndLineEnd(szCurrent,&szCurrent, end);
return ParseVertex(szCurrent, szCurrentOut, end, vertex, bVASection);
}
if(!ParseSignedInt(szCurrent, &szCurrent, end, (int&)vertex.iParentNode)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.parent");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.pos.x)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.pos.x");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.pos.y)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.pos.y");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.pos.z)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.pos.z");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent,&szCurrent,end, (float&)vertex.nor.x)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.nor.x");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent,&szCurrent, end, (float&)vertex.nor.y)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.nor.y");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.nor.z)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.nor.z");
SMDI_PARSE_RETURN;
}
if (bVASection) {
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.uv.x)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.uv.x");
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, (float&)vertex.uv.y)) {
LogErrorNoThrow("Unexpected EOF/EOL while parsing vertex.uv.y");
SMDI_PARSE_RETURN;
}
// now read the number of bones affecting this vertex
// all elements from now are fully optional, we don't need them
unsigned int iSize = 0;
if(!ParseUnsignedInt(szCurrent, &szCurrent, end, iSize)) {
SMDI_PARSE_RETURN;
}
vertex.aiBoneLinks.resize(iSize,std::pair<unsigned int, float>(0,0.0f));
for (auto &aiBoneLink : vertex.aiBoneLinks) {
if(!ParseUnsignedInt(szCurrent, &szCurrent, end, aiBoneLink.first)) {
SMDI_PARSE_RETURN;
}
if(!ParseFloat(szCurrent, &szCurrent, end, aiBoneLink.second)) {
SMDI_PARSE_RETURN;
}
}
// go to the beginning of the next line
SMDI_PARSE_RETURN;
}
} // namespace Assimp
#endif // !! ASSIMP_BUILD_NO_SMD_IMPORTER
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