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assimp/code/ColladaLoader.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development 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 Development 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 Collada loader */
#include "AssimpPCH.h"
#ifndef ASSIMP_BUILD_NO_DAE_IMPORTER
#include "../include/aiAnim.h"
#include "ColladaLoader.h"
#include "ColladaParser.h"
#include "fast_atof.h"
#include "ParsingUtils.h"
#include "time.h"
using namespace Assimp;
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
ColladaLoader::ColladaLoader()
{}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
ColladaLoader::~ColladaLoader()
{}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool ColladaLoader::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
{
// check file extension
std::string extension = GetExtension(pFile);
if( extension == "dae")
return true;
// XML - too generic, we need to open the file and search for typical keywords
if( extension == "xml" || !extension.length() || checkSig) {
/* If CanRead() is called in order to check whether we
* support a specific file extension in general pIOHandler
* might be NULL and it's our duty to return true here.
*/
if (!pIOHandler)return true;
const char* tokens[] = {"collada"};
return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
}
return false;
}
// ------------------------------------------------------------------------------------------------
// Get file extension list
void ColladaLoader::GetExtensionList( std::string& append)
{
append.append("*.dae");
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void ColladaLoader::InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler)
{
mFileName = pFile;
// clean all member arrays - just for safety, it should work even if we did not
mMeshIndexByID.clear();
mMaterialIndexByName.clear();
mMeshes.clear();
newMats.clear();
mLights.clear();
mCameras.clear();
mTextures.clear();
// parse the input file
ColladaParser parser( pIOHandler, pFile);
if( !parser.mRootNode)
throw new ImportErrorException( "Collada: File came out empty. Something is wrong here.");
// reserve some storage to avoid unnecessary reallocs
newMats.reserve(parser.mMaterialLibrary.size()*2);
mMeshes.reserve(parser.mMeshLibrary.size()*2);
mCameras.reserve(parser.mCameraLibrary.size());
mLights.reserve(parser.mLightLibrary.size());
// create the materials first, for the meshes to find
BuildMaterials( parser, pScene);
// build the node hierarchy from it
pScene->mRootNode = BuildHierarchy( parser, parser.mRootNode);
// ... then fill the materials with the now adjusted settings
FillMaterials(parser, pScene);
// Convert to Y_UP, if different orientation
if( parser.mUpDirection == ColladaParser::UP_X)
pScene->mRootNode->mTransformation *= aiMatrix4x4(
0, -1, 0, 0,
1, 0, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
else if( parser.mUpDirection == ColladaParser::UP_Z)
pScene->mRootNode->mTransformation *= aiMatrix4x4(
1, 0, 0, 0,
0, 0, 1, 0,
0, -1, 0, 0,
0, 0, 0, 1);
// store all meshes
StoreSceneMeshes( pScene);
// store all materials
StoreSceneMaterials( pScene);
// store all lights
StoreSceneLights( pScene);
// store all cameras
StoreSceneCameras( pScene);
}
// ------------------------------------------------------------------------------------------------
// Recursively constructs a scene node for the given parser node and returns it.
aiNode* ColladaLoader::BuildHierarchy( const ColladaParser& pParser, const Collada::Node* pNode)
{
// create a node for it
aiNode* node = new aiNode();
// now setup the name of the node. We take the name if not empty, otherwise the collada ID
// FIX: Workaround for XSI calling the instanced visual scene 'untitled' by default.
if (!pNode->mName.empty() && pNode->mName != "untitled")
node->mName.Set(pNode->mName);
else if (!pNode->mID.empty())
node->mName.Set(pNode->mID);
else
{
// No need to worry. Unnamed nodes are no problem at all, except
// if cameras or lights need to be assigned to them.
if (!pNode->mLights.empty() || !pNode->mCameras.empty()) {
::strcpy(node->mName.data,"$ColladaAutoName$_");
node->mName.length = 17 + ASSIMP_itoa10(node->mName.data+18,MAXLEN-18,(uint32_t)clock());
}
}
// calculate the transformation matrix for it
node->mTransformation = pParser.CalculateResultTransform( pNode->mTransforms);
// now resolve node instances
std::vector<Collada::Node*> instances;
ResolveNodeInstances(pParser,pNode,instances);
// add children. first the *real* ones
node->mNumChildren = pNode->mChildren.size()+instances.size();
node->mChildren = new aiNode*[node->mNumChildren];
unsigned int a = 0;
for(; a < pNode->mChildren.size(); a++)
{
node->mChildren[a] = BuildHierarchy( pParser, pNode->mChildren[a]);
node->mChildren[a]->mParent = node;
}
// ... and finally the resolved node instances
for(; a < node->mNumChildren; a++)
{
node->mChildren[a] = BuildHierarchy( pParser, instances[a-pNode->mChildren.size()]);
node->mChildren[a]->mParent = node;
}
// construct meshes
BuildMeshesForNode( pParser, pNode, node);
// construct cameras
BuildCamerasForNode(pParser, pNode, node);
// construct lights
BuildLightsForNode(pParser, pNode, node);
return node;
}
// ------------------------------------------------------------------------------------------------
// Resolve node instances
void ColladaLoader::ResolveNodeInstances( const ColladaParser& pParser, const Collada::Node* pNode,
std::vector<Collada::Node*>& resolved)
{
// reserve enough storage
resolved.reserve(pNode->mNodeInstances.size());
// ... and iterate through all nodes to be instanced as children of pNode
for (std::vector<Collada::NodeInstance>::const_iterator it = pNode->mNodeInstances.begin(),
end = pNode->mNodeInstances.end(); it != end; ++it)
{
// find the corresponding node in the library
ColladaParser::NodeLibrary::const_iterator fnd = pParser.mNodeLibrary.find((*it).mNode);
if (fnd == pParser.mNodeLibrary.end())
DefaultLogger::get()->error("Collada: Unable to resolve reference to instanced node " + (*it).mNode);
else {
// attach this node to the list of children
resolved.push_back((*fnd).second);
}
}
}
// ------------------------------------------------------------------------------------------------
// Resolve UV channels
void ColladaLoader::ApplyVertexToEffectSemanticMapping(Collada::Sampler& sampler,
const Collada::SemanticMappingTable& table)
{
std::map<std::string, Collada::InputSemanticMapEntry>::const_iterator it = table.mMap.find(sampler.mUVChannel);
if (it != table.mMap.end()) {
if (it->second.mType != Collada::IT_Texcoord)
DefaultLogger::get()->error("Collada: Unexpected effect input mapping");
sampler.mUVId = it->second.mSet;
}
}
// ------------------------------------------------------------------------------------------------
// Builds lights for the given node and references them
void ColladaLoader::BuildLightsForNode( const ColladaParser& pParser, const Collada::Node* pNode, aiNode* pTarget)
{
BOOST_FOREACH( const Collada::LightInstance& lid, pNode->mLights)
{
// find the referred light
ColladaParser::LightLibrary::const_iterator srcLightIt = pParser.mLightLibrary.find( lid.mLight);
if( srcLightIt == pParser.mLightLibrary.end())
{
DefaultLogger::get()->warn("Collada: Unable to find light for ID \"" + lid.mLight + "\". Skipping.");
continue;
}
const Collada::Light* srcLight = &srcLightIt->second;
if (srcLight->mType == aiLightSource_AMBIENT) {
DefaultLogger::get()->error("Collada: Skipping ambient light for the moment");
continue;
}
// now fill our ai data structure
aiLight* out = new aiLight();
out->mName = pTarget->mName;
out->mType = (aiLightSourceType)srcLight->mType;
// collada lights point in -Z by default, rest is specified in node transform
out->mDirection = aiVector3D(0.f,0.f,-1.f);
out->mAttenuationConstant = srcLight->mAttConstant;
out->mAttenuationLinear = srcLight->mAttLinear;
out->mAttenuationQuadratic = srcLight->mAttQuadratic;
// collada doesn't differenciate between these color types
out->mColorDiffuse = out->mColorSpecular = out->mColorAmbient = srcLight->mColor*srcLight->mIntensity;
// convert falloff angle and falloff exponent in our representation, if given
if (out->mType == aiLightSource_SPOT) {
out->mAngleInnerCone = AI_DEG_TO_RAD( srcLight->mFalloffAngle );
// ... some extension magic. FUCKING COLLADA.
if (srcLight->mOuterAngle == 10e10f)
{
// ... some deprecation magic. FUCKING FCOLLADA.
if (srcLight->mPenumbraAngle == 10e10f)
{
// Need to rely on falloff_exponent. I don't know how to interpret it, so I need to guess ....
// ci - inner cone angle
// co - outer cone angle
// fe - falloff exponent
// ld - spot direction - normalized
// rd - ray direction - normalized
//
// Formula is:
// 1. (cos(acos (ld dot rd) - ci))^fe == epsilon
// 2. (ld dot rd) == cos(acos(epsilon^(1/fe)) + ci)
// 3. co == acos (ld dot rd)
// 4. co == acos(epsilon^(1/fe)) + ci)
// epsilon chosen to be 0.1
out->mAngleOuterCone = AI_DEG_TO_RAD (acos(pow(0.1f,1.f/srcLight->mFalloffExponent))+
srcLight->mFalloffAngle);
}
else {
out->mAngleOuterCone = out->mAngleInnerCone + AI_DEG_TO_RAD( srcLight->mPenumbraAngle );
if (out->mAngleOuterCone < out->mAngleInnerCone)
std::swap(out->mAngleInnerCone,out->mAngleOuterCone);
}
}
else out->mAngleOuterCone = AI_DEG_TO_RAD( srcLight->mOuterAngle );
}
// add to light list
mLights.push_back(out);
}
}
// ------------------------------------------------------------------------------------------------
// Builds cameras for the given node and references them
void ColladaLoader::BuildCamerasForNode( const ColladaParser& pParser, const Collada::Node* pNode, aiNode* pTarget)
{
BOOST_FOREACH( const Collada::CameraInstance& cid, pNode->mCameras)
{
// find the referred light
ColladaParser::CameraLibrary::const_iterator srcCameraIt = pParser.mCameraLibrary.find( cid.mCamera);
if( srcCameraIt == pParser.mCameraLibrary.end())
{
DefaultLogger::get()->warn("Collada: Unable to find camera for ID \"" + cid.mCamera + "\". Skipping.");
continue;
}
const Collada::Camera* srcCamera = &srcCameraIt->second;
// orthographic cameras not yet supported in Assimp
if (srcCamera->mOrtho) {
DefaultLogger::get()->warn("Collada: Orthographic cameras are not supported.");
}
// now fill our ai data structure
aiCamera* out = new aiCamera();
out->mName = pTarget->mName;
// collada cameras point in -Z by default, rest is specified in node transform
out->mLookAt = aiVector3D(0.f,0.f,-1.f);
// near/far z is already ok
out->mClipPlaneFar = srcCamera->mZFar;
out->mClipPlaneNear = srcCamera->mZNear;
// ... but for the rest some values are optional
// and we need to compute the others in any combination. FUCKING COLLADA.
if (srcCamera->mAspect != 10e10f)
out->mAspect = srcCamera->mAspect;
if (srcCamera->mHorFov != 10e10f) {
out->mHorizontalFOV = srcCamera->mHorFov;
if (srcCamera->mVerFov != 10e10f && srcCamera->mAspect != 10e10f) {
out->mAspect = srcCamera->mHorFov/srcCamera->mVerFov;
}
}
else if (srcCamera->mAspect != 10e10f && srcCamera->mVerFov != 10e10f) {
out->mHorizontalFOV = srcCamera->mAspect*srcCamera->mVerFov;
}
// Collada uses degrees, we use radians
out->mHorizontalFOV = AI_DEG_TO_RAD(out->mHorizontalFOV);
// add to camera list
mCameras.push_back(out);
}
}
// ------------------------------------------------------------------------------------------------
// Builds meshes for the given node and references them
void ColladaLoader::BuildMeshesForNode( const ColladaParser& pParser, const Collada::Node* pNode, aiNode* pTarget)
{
// accumulated mesh references by this node
std::vector<size_t> newMeshRefs;
newMeshRefs.reserve(pNode->mMeshes.size());
// add a mesh for each subgroup in each collada mesh
BOOST_FOREACH( const Collada::MeshInstance& mid, pNode->mMeshes)
{
const Collada::Mesh* srcMesh = NULL;
const Collada::Controller* srcController = NULL;
// find the referred mesh
ColladaParser::MeshLibrary::const_iterator srcMeshIt = pParser.mMeshLibrary.find( mid.mMeshOrController);
if( srcMeshIt == pParser.mMeshLibrary.end())
{
// if not found in the mesh-library, it might also be a controller referring to a mesh
ColladaParser::ControllerLibrary::const_iterator srcContrIt = pParser.mControllerLibrary.find( mid.mMeshOrController);
if( srcContrIt != pParser.mControllerLibrary.end())
{
srcController = &srcContrIt->second;
srcMeshIt = pParser.mMeshLibrary.find( srcController->mMeshId);
if( srcMeshIt != pParser.mMeshLibrary.end())
srcMesh = srcMeshIt->second;
}
if( !srcMesh)
{
DefaultLogger::get()->warn( boost::str( boost::format( "Collada: Unable to find geometry for ID \"%s\". Skipping.") % mid.mMeshOrController));
continue;
}
} else
{
// ID found in the mesh library -> direct reference to an unskinned mesh
srcMesh = srcMeshIt->second;
}
// build a mesh for each of its subgroups
size_t vertexStart = 0, faceStart = 0;
for( size_t sm = 0; sm < srcMesh->mSubMeshes.size(); ++sm)
{
const Collada::SubMesh& submesh = srcMesh->mSubMeshes[sm];
if( submesh.mNumFaces == 0)
continue;
// find material assigned to this submesh
std::map<std::string, Collada::SemanticMappingTable >::const_iterator meshMatIt = mid.mMaterials.find( submesh.mMaterial);
const Collada::SemanticMappingTable* table;
if( meshMatIt != mid.mMaterials.end())
table = &meshMatIt->second;
else {
table = NULL;
DefaultLogger::get()->warn( boost::str( boost::format( "Collada: No material specified for subgroup \"%s\" in geometry \"%s\".") % submesh.mMaterial % mid.mMeshOrController));
}
const std::string& meshMaterial = table ? table->mMatName : "";
// OK ... here the *real* fun starts ... we have the vertex-input-to-effect-semantic-table
// given. The only mapping stuff which we do actually support is the UV channel.
std::map<std::string, size_t>::const_iterator matIt = mMaterialIndexByName.find( meshMaterial);
unsigned int matIdx;
if( matIt != mMaterialIndexByName.end())
matIdx = matIt->second;
else
matIdx = 0;
if (table && !table->mMap.empty() ) {
std::pair<Collada::Effect*, aiMaterial*>& mat = newMats[matIdx];
// Iterate through all texture channels assigned to the effect and
// check whether we have mapping information for it.
ApplyVertexToEffectSemanticMapping(mat.first->mTexDiffuse, *table);
ApplyVertexToEffectSemanticMapping(mat.first->mTexAmbient, *table);
ApplyVertexToEffectSemanticMapping(mat.first->mTexSpecular, *table);
ApplyVertexToEffectSemanticMapping(mat.first->mTexEmissive, *table);
ApplyVertexToEffectSemanticMapping(mat.first->mTexTransparent,*table);
ApplyVertexToEffectSemanticMapping(mat.first->mTexBump, *table);
}
// built lookup index of the Mesh-Submesh-Material combination
ColladaMeshIndex index( mid.mMeshOrController, sm, meshMaterial);
// if we already have the mesh at the library, just add its index to the node's array
std::map<ColladaMeshIndex, size_t>::const_iterator dstMeshIt = mMeshIndexByID.find( index);
if( dstMeshIt != mMeshIndexByID.end())
{
newMeshRefs.push_back( dstMeshIt->second);
} else
{
// else we have to add the mesh to the collection and store its newly assigned index at the node
aiMesh* dstMesh = CreateMesh( pParser, srcMesh, submesh, srcController, vertexStart, faceStart);
// store the mesh, and store its new index in the node
newMeshRefs.push_back( mMeshes.size());
mMeshIndexByID[index] = mMeshes.size();
mMeshes.push_back( dstMesh);
vertexStart += dstMesh->mNumVertices; faceStart += submesh.mNumFaces;
// assign the material index
dstMesh->mMaterialIndex = matIdx;
}
}
}
// now place all mesh references we gathered in the target node
pTarget->mNumMeshes = newMeshRefs.size();
if( newMeshRefs.size())
{
pTarget->mMeshes = new unsigned int[pTarget->mNumMeshes];
std::copy( newMeshRefs.begin(), newMeshRefs.end(), pTarget->mMeshes);
}
}
// ------------------------------------------------------------------------------------------------
// Creates a mesh for the given ColladaMesh face subset and returns the newly created mesh
aiMesh* ColladaLoader::CreateMesh( const ColladaParser& pParser, const Collada::Mesh* pSrcMesh, const Collada::SubMesh& pSubMesh,
const Collada::Controller* pSrcController, size_t pStartVertex, size_t pStartFace)
{
aiMesh* dstMesh = new aiMesh;
// count the vertices addressed by its faces
const size_t numVertices = std::accumulate( pSrcMesh->mFaceSize.begin() + pStartFace,
pSrcMesh->mFaceSize.begin() + pStartFace + pSubMesh.mNumFaces, 0);
// copy positions
dstMesh->mNumVertices = numVertices;
dstMesh->mVertices = new aiVector3D[numVertices];
std::copy( pSrcMesh->mPositions.begin() + pStartVertex, pSrcMesh->mPositions.begin() +
pStartVertex + numVertices, dstMesh->mVertices);
// normals, if given. HACK: (thom) Due to the fucking Collada spec we never
// know if we have the same number of normals as there are positions. So we
// also ignore any vertex attribute if it has a different count
if( pSrcMesh->mNormals.size() == pSrcMesh->mPositions.size())
{
dstMesh->mNormals = new aiVector3D[numVertices];
std::copy( pSrcMesh->mNormals.begin() + pStartVertex, pSrcMesh->mNormals.begin() +
pStartVertex + numVertices, dstMesh->mNormals);
}
// tangents, if given.
if( pSrcMesh->mTangents.size() == pSrcMesh->mPositions.size())
{
dstMesh->mTangents = new aiVector3D[numVertices];
std::copy( pSrcMesh->mTangents.begin() + pStartVertex, pSrcMesh->mTangents.begin() +
pStartVertex + numVertices, dstMesh->mTangents);
}
// bitangents, if given.
if( pSrcMesh->mBitangents.size() == pSrcMesh->mPositions.size())
{
dstMesh->mBitangents = new aiVector3D[numVertices];
std::copy( pSrcMesh->mBitangents.begin() + pStartVertex, pSrcMesh->mBitangents.begin() +
pStartVertex + numVertices, dstMesh->mBitangents);
}
// same for texturecoords, as many as we have
for( size_t a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++)
{
if( pSrcMesh->mTexCoords[a].size() == pSrcMesh->mPositions.size())
{
dstMesh->mTextureCoords[a] = new aiVector3D[numVertices];
for( size_t b = 0; b < numVertices; ++b)
dstMesh->mTextureCoords[a][b] = pSrcMesh->mTexCoords[a][pStartVertex+b];
dstMesh->mNumUVComponents[a] = pSrcMesh->mNumUVComponents[a];
}
}
// same for vertex colors, as many as we have
for( size_t a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; a++)
{
if( pSrcMesh->mColors[a].size() == pSrcMesh->mPositions.size())
{
dstMesh->mColors[a] = new aiColor4D[numVertices];
std::copy( pSrcMesh->mColors[a].begin() + pStartVertex, pSrcMesh->mColors[a].begin() + pStartVertex + numVertices, dstMesh->mColors[a]);
}
}
// create faces. Due to the fact that each face uses unique vertices, we can simply count up on each vertex
size_t vertex = 0;
dstMesh->mNumFaces = pSubMesh.mNumFaces;
dstMesh->mFaces = new aiFace[dstMesh->mNumFaces];
for( size_t a = 0; a < dstMesh->mNumFaces; ++a)
{
size_t s = pSrcMesh->mFaceSize[ pStartFace + a];
aiFace& face = dstMesh->mFaces[a];
face.mNumIndices = s;
face.mIndices = new unsigned int[s];
for( size_t b = 0; b < s; ++b)
face.mIndices[b] = vertex++;
}
// create bones if given
if( pSrcController)
{
// refuse if the vertex count does not match
// if( pSrcController->mWeightCounts.size() != dstMesh->mNumVertices)
// throw new ImportErrorException( "Joint Controller vertex count does not match mesh vertex count");
// resolve references - joint names
const Collada::Accessor& jointNamesAcc = pParser.ResolveLibraryReference( pParser.mAccessorLibrary, pSrcController->mJointNameSource);
const Collada::Data& jointNames = pParser.ResolveLibraryReference( pParser.mDataLibrary, jointNamesAcc.mSource);
// joint offset matrices
const Collada::Accessor& jointMatrixAcc = pParser.ResolveLibraryReference( pParser.mAccessorLibrary, pSrcController->mJointOffsetMatrixSource);
const Collada::Data& jointMatrices = pParser.ResolveLibraryReference( pParser.mDataLibrary, jointMatrixAcc.mSource);
// joint vertex_weight name list - should refer to the same list as the joint names above. If not, report and reconsider
const Collada::Accessor& weightNamesAcc = pParser.ResolveLibraryReference( pParser.mAccessorLibrary, pSrcController->mWeightInputJoints.mAccessor);
if( &weightNamesAcc != &jointNamesAcc)
throw new ImportErrorException( "Temporary implementational lazyness. If you read this, please report to the author.");
// vertex weights
const Collada::Accessor& weightsAcc = pParser.ResolveLibraryReference( pParser.mAccessorLibrary, pSrcController->mWeightInputWeights.mAccessor);
const Collada::Data& weights = pParser.ResolveLibraryReference( pParser.mDataLibrary, weightsAcc.mSource);
if( !jointNames.mIsStringArray || jointMatrices.mIsStringArray || weights.mIsStringArray)
throw new ImportErrorException( "Data type mismatch while resolving mesh joints");
// sanity check: we rely on the vertex weights always coming as pairs of BoneIndex-WeightIndex
if( pSrcController->mWeightInputJoints.mOffset != 0 || pSrcController->mWeightInputWeights.mOffset != 1)
throw new ImportErrorException( "Unsupported vertex_weight adresssing scheme. Fucking collada spec.");
// create containers to collect the weights for each bone
size_t numBones = jointNames.mStrings.size();
std::vector<std::vector<aiVertexWeight> > dstBones( numBones);
// build a temporary array of pointers to the start of each vertex's weights
typedef std::vector< std::pair<size_t, size_t> > IndexPairVector;
std::vector<IndexPairVector::const_iterator> weightStartPerVertex( pSrcController->mWeightCounts.size());
IndexPairVector::const_iterator pit = pSrcController->mWeights.begin();
for( size_t a = 0; a < pSrcController->mWeightCounts.size(); ++a)
{
weightStartPerVertex[a] = pit;
pit += pSrcController->mWeightCounts[a];
}
// now for each vertex put the corresponding vertex weights into each bone's weight collection
for( size_t a = pStartVertex; a < pStartVertex + numVertices; ++a)
{
// which position index was responsible for this vertex? that's also the index by which
// the controller assigns the vertex weights
size_t orgIndex = pSrcMesh->mFacePosIndices[a];
// find the vertex weights for this vertex
IndexPairVector::const_iterator iit = weightStartPerVertex[orgIndex];
size_t pairCount = pSrcController->mWeightCounts[orgIndex];
for( size_t b = 0; b < pairCount; ++b, ++iit)
{
size_t jointIndex = iit->first;
size_t vertexIndex = iit->second;
aiVertexWeight w;
w.mVertexId = a - pStartVertex;
w.mWeight = weights.mValues[vertexIndex];
dstBones[jointIndex].push_back( w);
}
}
// count the number of bones which influence vertices of the current submesh
size_t numRemainingBones = 0;
for( std::vector<std::vector<aiVertexWeight> >::const_iterator it = dstBones.begin(); it != dstBones.end(); ++it)
if( it->size() > 0)
numRemainingBones++;
// create bone array and copy bone weights one by one
dstMesh->mNumBones = numRemainingBones;
dstMesh->mBones = new aiBone*[numRemainingBones];
size_t boneCount = 0;
for( size_t a = 0; a < numBones; ++a)
{
// omit bones without weights
if( dstBones[a].size() == 0)
continue;
// create bone with its weights
aiBone* bone = new aiBone;
bone->mName = jointNames.mStrings[a];
bone->mOffsetMatrix.a1 = jointMatrices.mValues[a*16 + 0];
bone->mOffsetMatrix.a2 = jointMatrices.mValues[a*16 + 1];
bone->mOffsetMatrix.a3 = jointMatrices.mValues[a*16 + 2];
bone->mOffsetMatrix.a4 = jointMatrices.mValues[a*16 + 3];
bone->mOffsetMatrix.b1 = jointMatrices.mValues[a*16 + 4];
bone->mOffsetMatrix.b2 = jointMatrices.mValues[a*16 + 5];
bone->mOffsetMatrix.b3 = jointMatrices.mValues[a*16 + 6];
bone->mOffsetMatrix.b4 = jointMatrices.mValues[a*16 + 7];
bone->mOffsetMatrix.c1 = jointMatrices.mValues[a*16 + 8];
bone->mOffsetMatrix.c2 = jointMatrices.mValues[a*16 + 9];
bone->mOffsetMatrix.c3 = jointMatrices.mValues[a*16 + 10];
bone->mOffsetMatrix.c4 = jointMatrices.mValues[a*16 + 11];
bone->mNumWeights = dstBones[a].size();
bone->mWeights = new aiVertexWeight[bone->mNumWeights];
std::copy( dstBones[a].begin(), dstBones[a].end(), bone->mWeights);
// and insert bone
dstMesh->mBones[boneCount++] = bone;
}
}
return dstMesh;
}
// ------------------------------------------------------------------------------------------------
// Stores all meshes in the given scene
void ColladaLoader::StoreSceneMeshes( aiScene* pScene)
{
pScene->mNumMeshes = mMeshes.size();
if( mMeshes.size() > 0)
{
pScene->mMeshes = new aiMesh*[mMeshes.size()];
std::copy( mMeshes.begin(), mMeshes.end(), pScene->mMeshes);
}
mMeshes.clear();
}
// ------------------------------------------------------------------------------------------------
// Stores all cameras in the given scene
void ColladaLoader::StoreSceneCameras( aiScene* pScene)
{
pScene->mNumCameras = mCameras.size();
if( mCameras.size() > 0)
{
pScene->mCameras = new aiCamera*[mCameras.size()];
std::copy( mCameras.begin(), mCameras.end(), pScene->mCameras);
}
mCameras.clear();
}
// ------------------------------------------------------------------------------------------------
// Stores all lights in the given scene
void ColladaLoader::StoreSceneLights( aiScene* pScene)
{
pScene->mNumLights = mLights.size();
if( mLights.size() > 0)
{
pScene->mLights = new aiLight*[mLights.size()];
std::copy( mLights.begin(), mLights.end(), pScene->mLights);
}
mLights.clear();
}
// ------------------------------------------------------------------------------------------------
// Stores all textures in the given scene
void ColladaLoader::StoreSceneTextures( aiScene* pScene)
{
pScene->mNumTextures = mTextures.size();
if( mTextures.size() > 0)
{
pScene->mTextures = new aiTexture*[mTextures.size()];
std::copy( mTextures.begin(), mTextures.end(), pScene->mTextures);
}
mTextures.clear();
}
// ------------------------------------------------------------------------------------------------
// Stores all materials in the given scene
void ColladaLoader::StoreSceneMaterials( aiScene* pScene)
{
pScene->mNumMaterials = newMats.size();
pScene->mMaterials = new aiMaterial*[newMats.size()];
for (unsigned int i = 0; i < newMats.size();++i)
pScene->mMaterials[i] = newMats[i].second;
newMats.clear();
}
// ------------------------------------------------------------------------------------------------
// Add a texture to a material structure
void ColladaLoader::AddTexture ( Assimp::MaterialHelper& mat, const ColladaParser& pParser,
const Collada::Effect& effect,
const Collada::Sampler& sampler,
aiTextureType type, unsigned int idx)
{
// first of all, basic file name
mat.AddProperty( &FindFilenameForEffectTexture( pParser, effect, sampler.mName),
_AI_MATKEY_TEXTURE_BASE,type,idx);
// mapping mode
int map = aiTextureMapMode_Clamp;
if (sampler.mWrapU)
map = aiTextureMapMode_Wrap;
if (sampler.mWrapU && sampler.mMirrorU)
map = aiTextureMapMode_Mirror;
mat.AddProperty( &map, 1, _AI_MATKEY_MAPPINGMODE_U_BASE, type, idx);
map = aiTextureMapMode_Clamp;
if (sampler.mWrapV)
map = aiTextureMapMode_Wrap;
if (sampler.mWrapV && sampler.mMirrorV)
map = aiTextureMapMode_Mirror;
mat.AddProperty( &map, 1, _AI_MATKEY_MAPPINGMODE_V_BASE, type, idx);
// UV transformation
mat.AddProperty(&sampler.mTransform, 1,
_AI_MATKEY_UVTRANSFORM_BASE, type, idx);
// Blend mode
mat.AddProperty((int*)&sampler.mOp , 1,
_AI_MATKEY_TEXBLEND_BASE, type, idx);
// Blend factor
mat.AddProperty((float*)&sampler.mWeighting , 1,
_AI_MATKEY_TEXBLEND_BASE, type, idx);
// UV source index ... if we didn't resolve the mapping it is actually just
// a guess but it works in most cases. We search for the frst occurence of a
// number in the channel name. We assume it is the zero-based index into the
// UV channel array of all corresponding meshes.
if (sampler.mUVId != 0xffffffff)
map = sampler.mUVId;
else {
map = 0xffffffff;
for (std::string::const_iterator it = sampler.mUVChannel.begin();
it != sampler.mUVChannel.end(); ++it)
{
if (IsNumeric(*it)) {
map = strtol10(&(*it));
break;
}
}
if (0xffffffff == map) {
DefaultLogger::get()->warn("Collada: unable to determine UV channel for texture");
map = 0;
}
}
mat.AddProperty(&map,1,_AI_MATKEY_UVWSRC_BASE,type,idx);
}
// ------------------------------------------------------------------------------------------------
// Fills materials from the collada material definitions
void ColladaLoader::FillMaterials( const ColladaParser& pParser, aiScene* pScene)
{
for (std::vector<std::pair<Collada::Effect*, aiMaterial*> >::iterator it = newMats.begin(),
end = newMats.end(); it != end; ++it)
{
MaterialHelper& mat = (MaterialHelper&)*it->second;
Collada::Effect& effect = *it->first;
// resolve shading mode
int shadeMode;
if (effect.mFaceted) /* fixme */
shadeMode = aiShadingMode_Flat;
else {
switch( effect.mShadeType)
{
case Collada::Shade_Constant:
shadeMode = aiShadingMode_NoShading;
break;
case Collada::Shade_Lambert:
shadeMode = aiShadingMode_Gouraud;
break;
case Collada::Shade_Blinn:
shadeMode = aiShadingMode_Blinn;
break;
case Collada::Shade_Phong:
shadeMode = aiShadingMode_Phong;
break;
default:
DefaultLogger::get()->warn("Collada: Unrecognized shading mode, using gouraud shading");
shadeMode = aiShadingMode_Gouraud;
break;
}
}
mat.AddProperty<int>( &shadeMode, 1, AI_MATKEY_SHADING_MODEL);
// double-sided?
shadeMode = effect.mDoubleSided;
mat.AddProperty<int>( &shadeMode, 1, AI_MATKEY_TWOSIDED);
// wireframe?
shadeMode = effect.mWireframe;
mat.AddProperty<int>( &shadeMode, 1, AI_MATKEY_ENABLE_WIREFRAME);
// add material colors
mat.AddProperty( &effect.mAmbient, 1,AI_MATKEY_COLOR_AMBIENT);
mat.AddProperty( &effect.mDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
mat.AddProperty( &effect.mSpecular, 1,AI_MATKEY_COLOR_SPECULAR);
mat.AddProperty( &effect.mEmissive, 1, AI_MATKEY_COLOR_EMISSIVE);
mat.AddProperty( &effect.mTransparent, 1, AI_MATKEY_COLOR_TRANSPARENT);
mat.AddProperty( &effect.mReflective, 1, AI_MATKEY_COLOR_REFLECTIVE);
// scalar properties
mat.AddProperty( &effect.mShininess, 1, AI_MATKEY_SHININESS);
mat.AddProperty( &effect.mRefractIndex, 1, AI_MATKEY_REFRACTI);
// add textures, if given
if( !effect.mTexAmbient.mName.empty())
/* It is merely a lightmap */
AddTexture( mat, pParser, effect, effect.mTexAmbient, aiTextureType_LIGHTMAP);
if( !effect.mTexEmissive.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexEmissive, aiTextureType_EMISSIVE);
if( !effect.mTexSpecular.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexSpecular, aiTextureType_SPECULAR);
if( !effect.mTexDiffuse.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexDiffuse, aiTextureType_DIFFUSE);
if( !effect.mTexBump.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexBump, aiTextureType_HEIGHT);
if( !effect.mTexTransparent.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexTransparent, aiTextureType_OPACITY);
if( !effect.mTexReflective.mName.empty())
AddTexture( mat, pParser, effect, effect.mTexReflective, aiTextureType_REFLECTION);
}
}
// ------------------------------------------------------------------------------------------------
// Constructs materials from the collada material definitions
void ColladaLoader::BuildMaterials( const ColladaParser& pParser, aiScene* pScene)
{
newMats.reserve(pParser.mMaterialLibrary.size());
for( ColladaParser::MaterialLibrary::const_iterator matIt = pParser.mMaterialLibrary.begin(); matIt != pParser.mMaterialLibrary.end(); ++matIt)
{
const Collada::Material& material = matIt->second;
// a material is only a reference to an effect
ColladaParser::EffectLibrary::const_iterator effIt = pParser.mEffectLibrary.find( material.mEffect);
if( effIt == pParser.mEffectLibrary.end())
continue;
const Collada::Effect& effect = effIt->second;
// create material
Assimp::MaterialHelper* mat = new Assimp::MaterialHelper;
aiString name( matIt->first);
mat->AddProperty(&name,AI_MATKEY_NAME);
// MEGA SUPER MONSTER HACK by Alex ... It's all my fault, yes.
// We store the reference to the effect in the material and
// return ... we'll add the actual material properties later
// after we processed all meshes. During mesh processing,
// we evaluate vertex input mappings. Afterwards we should be
// able to correctly setup source UV channels for textures.
// ... moved to ColladaLoader::FillMaterials()
// *duck*
// store the material
mMaterialIndexByName[matIt->first] = newMats.size();
newMats.push_back( std::pair<Collada::Effect*, aiMaterial*>(const_cast<Collada::Effect*>(&effect),mat) );
}
// store a dummy material if none were given
if( newMats.size() == 0)
{
Assimp::MaterialHelper* mat = new Assimp::MaterialHelper;
aiString name( AI_DEFAULT_MATERIAL_NAME );
mat->AddProperty( &name, AI_MATKEY_NAME);
const int shadeMode = aiShadingMode_Phong;
mat->AddProperty<int>( &shadeMode, 1, AI_MATKEY_SHADING_MODEL);
aiColor4D colAmbient( 0.2f, 0.2f, 0.2f, 1.0f), colDiffuse( 0.8f, 0.8f, 0.8f, 1.0f), colSpecular( 0.5f, 0.5f, 0.5f, 0.5f);
mat->AddProperty( &colAmbient, 1, AI_MATKEY_COLOR_AMBIENT);
mat->AddProperty( &colDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
mat->AddProperty( &colSpecular, 1, AI_MATKEY_COLOR_SPECULAR);
const float specExp = 5.0f;
mat->AddProperty( &specExp, 1, AI_MATKEY_SHININESS);
}
}
// ------------------------------------------------------------------------------------------------
// Resolves the texture name for the given effect texture entry
const aiString& ColladaLoader::FindFilenameForEffectTexture( const ColladaParser& pParser,
const Collada::Effect& pEffect, const std::string& pName)
{
// recurse through the param references until we end up at an image
std::string name = pName;
while( 1)
{
// the given string is a param entry. Find it
Collada::Effect::ParamLibrary::const_iterator it = pEffect.mParams.find( name);
// if not found, we're at the end of the recursion. The resulting string should be the image ID
if( it == pEffect.mParams.end())
break;
// else recurse on
name = it->second.mReference;
}
// find the image referred by this name in the image library of the scene
ColladaParser::ImageLibrary::const_iterator imIt = pParser.mImageLibrary.find( name);
if( imIt == pParser.mImageLibrary.end())
{
throw new ImportErrorException( boost::str( boost::format(
"Collada: Unable to resolve effect texture entry \"%s\", ended up at ID \"%s\".") % pName % name));
}
static aiString result;
// if this is an embedded texture image setup an aiTexture for it
if (imIt->second.mFileName.empty())
{
if (imIt->second.mImageData.empty())
throw new ImportErrorException("Collada: Invalid texture, no data or file reference given");
aiTexture* tex = new aiTexture();
// setup format hint
if (imIt->second.mEmbeddedFormat.length() > 3)
DefaultLogger::get()->warn("Collada: texture format hint is too long, truncating to 3 characters");
strncpy(tex->achFormatHint,imIt->second.mEmbeddedFormat.c_str(),3);
// and copy texture data
tex->mHeight = 0;
tex->mWidth = imIt->second.mImageData.size();
tex->pcData = (aiTexel*)new char[tex->mWidth];
memcpy(tex->pcData,&imIt->second.mImageData[0],tex->mWidth);
// setup texture reference string
result.data[0] = '*';
result.length = 1 + ASSIMP_itoa10(result.data+1,MAXLEN-1,mTextures.size());
// and add this texture to the list
mTextures.push_back(tex);
}
else
{
result.Set( imIt->second.mFileName );
ConvertPath(result);
}
return result;
}
// ------------------------------------------------------------------------------------------------
// Convert a path read from a collada file to the usual representation
void ColladaLoader::ConvertPath (aiString& ss)
{
// TODO: collada spec, p 22. Handle URI correctly.
// For the moment we're just stripping the file:// away to make it work.
// Windoes doesn't seem to be able to find stuff like
// 'file://..\LWO\LWO2\MappingModes\earthSpherical.jpg'
if (0 == strncmp(ss.data,"file://",7))
{
ss.length -= 7;
memmove(ss.data,ss.data+7,ss.length);
ss.data[ss.length] = '\0';
}
}
#endif // !! ASSIMP_BUILD_NO_DAE_IMPORTER
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