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Diffstat (limited to 'src/mesh/assimp-master/code/AssetLib/3DS/3DSConverter.cpp')
| -rw-r--r-- | src/mesh/assimp-master/code/AssetLib/3DS/3DSConverter.cpp | 807 |
1 files changed, 807 insertions, 0 deletions
diff --git a/src/mesh/assimp-master/code/AssetLib/3DS/3DSConverter.cpp b/src/mesh/assimp-master/code/AssetLib/3DS/3DSConverter.cpp new file mode 100644 index 0000000..5a01429 --- /dev/null +++ b/src/mesh/assimp-master/code/AssetLib/3DS/3DSConverter.cpp @@ -0,0 +1,807 @@ +/* +--------------------------------------------------------------------------- +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 3ds importer class */ + +#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER + +// internal headers +#include "3DSLoader.h" +#include "Common/TargetAnimation.h" +#include <assimp/StringComparison.h> +#include <assimp/scene.h> +#include <assimp/DefaultLogger.hpp> +#include <cctype> +#include <memory> + +using namespace Assimp; + +static const unsigned int NotSet = 0xcdcdcdcd; + +// ------------------------------------------------------------------------------------------------ +// Setup final material indices, generae a default material if necessary +void Discreet3DSImporter::ReplaceDefaultMaterial() { + // Try to find an existing material that matches the + // typical default material setting: + // - no textures + // - diffuse color (in grey!) + // NOTE: This is here to workaround the fact that some + // exporters are writing a default material, too. + unsigned int idx(NotSet); + for (unsigned int i = 0; i < mScene->mMaterials.size(); ++i) { + std::string s = mScene->mMaterials[i].mName; + for (char & it : s) { + it = static_cast<char>(::tolower(static_cast<unsigned char>(it))); + } + + if (std::string::npos == s.find("default")) continue; + + if (mScene->mMaterials[i].mDiffuse.r != + mScene->mMaterials[i].mDiffuse.g || + mScene->mMaterials[i].mDiffuse.r != + mScene->mMaterials[i].mDiffuse.b) continue; + + if (ContainsTextures(i)) { + continue; + } + idx = i; + } + if (NotSet == idx) { + idx = (unsigned int)mScene->mMaterials.size(); + } + + // now iterate through all meshes and through all faces and + // find all faces that are using the default material + unsigned int cnt = 0; + for (std::vector<D3DS::Mesh>::iterator + i = mScene->mMeshes.begin(); + i != mScene->mMeshes.end(); ++i) { + for (std::vector<unsigned int>::iterator + a = (*i).mFaceMaterials.begin(); + a != (*i).mFaceMaterials.end(); ++a) { + // NOTE: The additional check seems to be necessary, + // some exporters seem to generate invalid data here + if (0xcdcdcdcd == (*a)) { + (*a) = idx; + ++cnt; + } else if ((*a) >= mScene->mMaterials.size()) { + (*a) = idx; + ASSIMP_LOG_WARN("Material index overflow in 3DS file. Using default material"); + ++cnt; + } + } + } + if (cnt && idx == mScene->mMaterials.size()) { + // We need to create our own default material + D3DS::Material sMat("%%%DEFAULT"); + sMat.mDiffuse = aiColor3D(0.3f, 0.3f, 0.3f); + mScene->mMaterials.push_back(sMat); + + ASSIMP_LOG_INFO("3DS: Generating default material"); + } +} + +// ------------------------------------------------------------------------------------------------ +// Check whether all indices are valid. Otherwise we'd crash before the validation step is reached +void Discreet3DSImporter::CheckIndices(D3DS::Mesh &sMesh) { + for (std::vector<D3DS::Face>::iterator i = sMesh.mFaces.begin(); i != sMesh.mFaces.end(); ++i) { + // check whether all indices are in range + for (unsigned int a = 0; a < 3; ++a) { + if ((*i).mIndices[a] >= sMesh.mPositions.size()) { + ASSIMP_LOG_WARN("3DS: Vertex index overflow)"); + (*i).mIndices[a] = (uint32_t)sMesh.mPositions.size() - 1; + } + if (!sMesh.mTexCoords.empty() && (*i).mIndices[a] >= sMesh.mTexCoords.size()) { + ASSIMP_LOG_WARN("3DS: Texture coordinate index overflow)"); + (*i).mIndices[a] = (uint32_t)sMesh.mTexCoords.size() - 1; + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +// Generate out unique verbose format representation +void Discreet3DSImporter::MakeUnique(D3DS::Mesh &sMesh) { + // TODO: really necessary? I don't think. Just a waste of memory and time + // to do it now in a separate buffer. + + // Allocate output storage + std::vector<aiVector3D> vNew(sMesh.mFaces.size() * 3); + std::vector<aiVector3D> vNew2; + if (sMesh.mTexCoords.size()) + vNew2.resize(sMesh.mFaces.size() * 3); + + for (unsigned int i = 0, base = 0; i < sMesh.mFaces.size(); ++i) { + D3DS::Face &face = sMesh.mFaces[i]; + + // Positions + for (unsigned int a = 0; a < 3; ++a, ++base) { + vNew[base] = sMesh.mPositions[face.mIndices[a]]; + if (sMesh.mTexCoords.size()) + vNew2[base] = sMesh.mTexCoords[face.mIndices[a]]; + + face.mIndices[a] = base; + } + } + sMesh.mPositions = vNew; + sMesh.mTexCoords = vNew2; +} + +// ------------------------------------------------------------------------------------------------ +// Convert a 3DS texture to texture keys in an aiMaterial +void CopyTexture(aiMaterial &mat, D3DS::Texture &texture, aiTextureType type) { + // Setup the texture name + aiString tex; + tex.Set(texture.mMapName); + mat.AddProperty(&tex, AI_MATKEY_TEXTURE(type, 0)); + + // Setup the texture blend factor + if (is_not_qnan(texture.mTextureBlend)) + mat.AddProperty<ai_real>(&texture.mTextureBlend, 1, AI_MATKEY_TEXBLEND(type, 0)); + + // Setup the texture mapping mode + int mapMode = static_cast<int>(texture.mMapMode); + mat.AddProperty<int>(&mapMode, 1, AI_MATKEY_MAPPINGMODE_U(type, 0)); + mat.AddProperty<int>(&mapMode, 1, AI_MATKEY_MAPPINGMODE_V(type, 0)); + + // Mirroring - double the scaling values + // FIXME: this is not really correct ... + if (texture.mMapMode == aiTextureMapMode_Mirror) { + texture.mScaleU *= 2.0; + texture.mScaleV *= 2.0; + texture.mOffsetU /= 2.0; + texture.mOffsetV /= 2.0; + } + + // Setup texture UV transformations + mat.AddProperty<ai_real>(&texture.mOffsetU, 5, AI_MATKEY_UVTRANSFORM(type, 0)); +} + +// ------------------------------------------------------------------------------------------------ +// Convert a 3DS material to an aiMaterial +void Discreet3DSImporter::ConvertMaterial(D3DS::Material &oldMat, + aiMaterial &mat) { + // NOTE: Pass the background image to the viewer by bypassing the + // material system. This is an evil hack, never do it again! + if (0 != mBackgroundImage.length() && bHasBG) { + aiString tex; + tex.Set(mBackgroundImage); + mat.AddProperty(&tex, AI_MATKEY_GLOBAL_BACKGROUND_IMAGE); + + // Be sure this is only done for the first material + mBackgroundImage = std::string(); + } + + // At first add the base ambient color of the scene to the material + oldMat.mAmbient.r += mClrAmbient.r; + oldMat.mAmbient.g += mClrAmbient.g; + oldMat.mAmbient.b += mClrAmbient.b; + + aiString name; + name.Set(oldMat.mName); + mat.AddProperty(&name, AI_MATKEY_NAME); + + // Material colors + mat.AddProperty(&oldMat.mAmbient, 1, AI_MATKEY_COLOR_AMBIENT); + mat.AddProperty(&oldMat.mDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE); + mat.AddProperty(&oldMat.mSpecular, 1, AI_MATKEY_COLOR_SPECULAR); + mat.AddProperty(&oldMat.mEmissive, 1, AI_MATKEY_COLOR_EMISSIVE); + + // Phong shininess and shininess strength + if (D3DS::Discreet3DS::Phong == oldMat.mShading || + D3DS::Discreet3DS::Metal == oldMat.mShading) { + if (!oldMat.mSpecularExponent || !oldMat.mShininessStrength) { + oldMat.mShading = D3DS::Discreet3DS::Gouraud; + } else { + mat.AddProperty(&oldMat.mSpecularExponent, 1, AI_MATKEY_SHININESS); + mat.AddProperty(&oldMat.mShininessStrength, 1, AI_MATKEY_SHININESS_STRENGTH); + } + } + + // Opacity + mat.AddProperty<ai_real>(&oldMat.mTransparency, 1, AI_MATKEY_OPACITY); + + // Bump height scaling + mat.AddProperty<ai_real>(&oldMat.mBumpHeight, 1, AI_MATKEY_BUMPSCALING); + + // Two sided rendering? + if (oldMat.mTwoSided) { + int i = 1; + mat.AddProperty<int>(&i, 1, AI_MATKEY_TWOSIDED); + } + + // Shading mode + aiShadingMode eShading = aiShadingMode_NoShading; + switch (oldMat.mShading) { + case D3DS::Discreet3DS::Flat: + eShading = aiShadingMode_Flat; + break; + + // I don't know what "Wire" shading should be, + // assume it is simple lambertian diffuse shading + case D3DS::Discreet3DS::Wire: { + // Set the wireframe flag + unsigned int iWire = 1; + mat.AddProperty<int>((int *)&iWire, 1, AI_MATKEY_ENABLE_WIREFRAME); + } + + case D3DS::Discreet3DS::Gouraud: + eShading = aiShadingMode_Gouraud; + break; + + // assume cook-torrance shading for metals. + case D3DS::Discreet3DS::Phong: + eShading = aiShadingMode_Phong; + break; + + case D3DS::Discreet3DS::Metal: + eShading = aiShadingMode_CookTorrance; + break; + + // FIX to workaround a warning with GCC 4 who complained + // about a missing case Blinn: here - Blinn isn't a valid + // value in the 3DS Loader, it is just needed for ASE + case D3DS::Discreet3DS::Blinn: + eShading = aiShadingMode_Blinn; + break; + } + int eShading_ = static_cast<int>(eShading); + mat.AddProperty<int>(&eShading_, 1, AI_MATKEY_SHADING_MODEL); + + // DIFFUSE texture + if (oldMat.sTexDiffuse.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexDiffuse, aiTextureType_DIFFUSE); + + // SPECULAR texture + if (oldMat.sTexSpecular.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexSpecular, aiTextureType_SPECULAR); + + // OPACITY texture + if (oldMat.sTexOpacity.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexOpacity, aiTextureType_OPACITY); + + // EMISSIVE texture + if (oldMat.sTexEmissive.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexEmissive, aiTextureType_EMISSIVE); + + // BUMP texture + if (oldMat.sTexBump.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexBump, aiTextureType_HEIGHT); + + // SHININESS texture + if (oldMat.sTexShininess.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexShininess, aiTextureType_SHININESS); + + // REFLECTION texture + if (oldMat.sTexReflective.mMapName.length() > 0) + CopyTexture(mat, oldMat.sTexReflective, aiTextureType_REFLECTION); + + // Store the name of the material itself, too + if (oldMat.mName.length()) { + aiString tex; + tex.Set(oldMat.mName); + mat.AddProperty(&tex, AI_MATKEY_NAME); + } +} + +// ------------------------------------------------------------------------------------------------ +// Split meshes by their materials and generate output aiMesh'es +void Discreet3DSImporter::ConvertMeshes(aiScene *pcOut) { + std::vector<aiMesh *> avOutMeshes; + avOutMeshes.reserve(mScene->mMeshes.size() * 2); + + unsigned int iFaceCnt = 0, num = 0; + aiString name; + + // we need to split all meshes by their materials + for (std::vector<D3DS::Mesh>::iterator i = mScene->mMeshes.begin(); i != mScene->mMeshes.end(); ++i) { + std::unique_ptr<std::vector<unsigned int>[]> aiSplit(new std::vector<unsigned int>[mScene->mMaterials.size()]); + + name.length = ASSIMP_itoa10(name.data, num++); + + unsigned int iNum = 0; + for (std::vector<unsigned int>::const_iterator a = (*i).mFaceMaterials.begin(); + a != (*i).mFaceMaterials.end(); ++a, ++iNum) { + aiSplit[*a].push_back(iNum); + } + // now generate submeshes + for (unsigned int p = 0; p < mScene->mMaterials.size(); ++p) { + if (aiSplit[p].empty()) { + continue; + } + aiMesh *meshOut = new aiMesh(); + meshOut->mName = name; + meshOut->mPrimitiveTypes = aiPrimitiveType_TRIANGLE; + + // be sure to setup the correct material index + meshOut->mMaterialIndex = p; + + // use the color data as temporary storage + meshOut->mColors[0] = (aiColor4D *)(&*i); + avOutMeshes.push_back(meshOut); + + // convert vertices + meshOut->mNumFaces = (unsigned int)aiSplit[p].size(); + meshOut->mNumVertices = meshOut->mNumFaces * 3; + + // allocate enough storage for faces + meshOut->mFaces = new aiFace[meshOut->mNumFaces]; + iFaceCnt += meshOut->mNumFaces; + + meshOut->mVertices = new aiVector3D[meshOut->mNumVertices]; + meshOut->mNormals = new aiVector3D[meshOut->mNumVertices]; + if ((*i).mTexCoords.size()) { + meshOut->mTextureCoords[0] = new aiVector3D[meshOut->mNumVertices]; + } + for (unsigned int q = 0, base = 0; q < aiSplit[p].size(); ++q) { + unsigned int index = aiSplit[p][q]; + aiFace &face = meshOut->mFaces[q]; + + face.mIndices = new unsigned int[3]; + face.mNumIndices = 3; + + for (unsigned int a = 0; a < 3; ++a, ++base) { + unsigned int idx = (*i).mFaces[index].mIndices[a]; + meshOut->mVertices[base] = (*i).mPositions[idx]; + meshOut->mNormals[base] = (*i).mNormals[idx]; + + if ((*i).mTexCoords.size()) + meshOut->mTextureCoords[0][base] = (*i).mTexCoords[idx]; + + face.mIndices[a] = base; + } + } + } + } + + // Copy them to the output array + pcOut->mNumMeshes = (unsigned int)avOutMeshes.size(); + pcOut->mMeshes = new aiMesh *[pcOut->mNumMeshes](); + for (unsigned int a = 0; a < pcOut->mNumMeshes; ++a) { + pcOut->mMeshes[a] = avOutMeshes[a]; + } + + // We should have at least one face here + if (!iFaceCnt) { + throw DeadlyImportError("No faces loaded. The mesh is empty"); + } +} + +// ------------------------------------------------------------------------------------------------ +// Add a node to the scenegraph and setup its final transformation +void Discreet3DSImporter::AddNodeToGraph(aiScene *pcSOut, aiNode *pcOut, + D3DS::Node *pcIn, aiMatrix4x4 & /*absTrafo*/) { + std::vector<unsigned int> iArray; + iArray.reserve(3); + + aiMatrix4x4 abs; + + // Find all meshes with the same name as the node + for (unsigned int a = 0; a < pcSOut->mNumMeshes; ++a) { + const D3DS::Mesh *pcMesh = (const D3DS::Mesh *)pcSOut->mMeshes[a]->mColors[0]; + ai_assert(nullptr != pcMesh); + + if (pcIn->mName == pcMesh->mName) + iArray.push_back(a); + } + if (!iArray.empty()) { + // The matrix should be identical for all meshes with the + // same name. It HAS to be identical for all meshes ..... + D3DS::Mesh *imesh = ((D3DS::Mesh *)pcSOut->mMeshes[iArray[0]]->mColors[0]); + + // Compute the inverse of the transformation matrix to move the + // vertices back to their relative and local space + aiMatrix4x4 mInv = imesh->mMat, mInvTransposed = imesh->mMat; + mInv.Inverse(); + mInvTransposed.Transpose(); + aiVector3D pivot = pcIn->vPivot; + + pcOut->mNumMeshes = (unsigned int)iArray.size(); + pcOut->mMeshes = new unsigned int[iArray.size()]; + for (unsigned int i = 0; i < iArray.size(); ++i) { + const unsigned int iIndex = iArray[i]; + aiMesh *const mesh = pcSOut->mMeshes[iIndex]; + + if (mesh->mColors[1] == nullptr) { + // Transform the vertices back into their local space + // fixme: consider computing normals after this, so we don't need to transform them + const aiVector3D *const pvEnd = mesh->mVertices + mesh->mNumVertices; + aiVector3D *pvCurrent = mesh->mVertices, *t2 = mesh->mNormals; + + for (; pvCurrent != pvEnd; ++pvCurrent, ++t2) { + *pvCurrent = mInv * (*pvCurrent); + *t2 = mInvTransposed * (*t2); + } + + // Handle negative transformation matrix determinant -> invert vertex x + if (imesh->mMat.Determinant() < 0.0f) { + /* we *must* have normals */ + for (pvCurrent = mesh->mVertices, t2 = mesh->mNormals; pvCurrent != pvEnd; ++pvCurrent, ++t2) { + pvCurrent->x *= -1.f; + t2->x *= -1.f; + } + ASSIMP_LOG_INFO("3DS: Flipping mesh X-Axis"); + } + + // Handle pivot point + if (pivot.x || pivot.y || pivot.z) { + for (pvCurrent = mesh->mVertices; pvCurrent != pvEnd; ++pvCurrent) { + *pvCurrent -= pivot; + } + } + + mesh->mColors[1] = (aiColor4D *)1; + } else + mesh->mColors[1] = (aiColor4D *)1; + + // Setup the mesh index + pcOut->mMeshes[i] = iIndex; + } + } + + // Setup the name of the node + // First instance keeps its name otherwise something might break, all others will be postfixed with their instance number + if (pcIn->mInstanceNumber > 1) { + char tmp[12]; + ASSIMP_itoa10(tmp, pcIn->mInstanceNumber); + std::string tempStr = pcIn->mName + "_inst_"; + tempStr += tmp; + pcOut->mName.Set(tempStr); + } else + pcOut->mName.Set(pcIn->mName); + + // Now build the transformation matrix of the node + // ROTATION + if (pcIn->aRotationKeys.size()) { + + // FIX to get to Assimp's quaternion conventions + for (std::vector<aiQuatKey>::iterator it = pcIn->aRotationKeys.begin(); it != pcIn->aRotationKeys.end(); ++it) { + (*it).mValue.w *= -1.f; + } + + pcOut->mTransformation = aiMatrix4x4(pcIn->aRotationKeys[0].mValue.GetMatrix()); + } else if (pcIn->aCameraRollKeys.size()) { + aiMatrix4x4::RotationZ(AI_DEG_TO_RAD(-pcIn->aCameraRollKeys[0].mValue), + pcOut->mTransformation); + } + + // SCALING + aiMatrix4x4 &m = pcOut->mTransformation; + if (pcIn->aScalingKeys.size()) { + const aiVector3D &v = pcIn->aScalingKeys[0].mValue; + m.a1 *= v.x; + m.b1 *= v.x; + m.c1 *= v.x; + m.a2 *= v.y; + m.b2 *= v.y; + m.c2 *= v.y; + m.a3 *= v.z; + m.b3 *= v.z; + m.c3 *= v.z; + } + + // TRANSLATION + if (pcIn->aPositionKeys.size()) { + const aiVector3D &v = pcIn->aPositionKeys[0].mValue; + m.a4 += v.x; + m.b4 += v.y; + m.c4 += v.z; + } + + // Generate animation channels for the node + if (pcIn->aPositionKeys.size() > 1 || pcIn->aRotationKeys.size() > 1 || + pcIn->aScalingKeys.size() > 1 || pcIn->aCameraRollKeys.size() > 1 || + pcIn->aTargetPositionKeys.size() > 1) { + aiAnimation *anim = pcSOut->mAnimations[0]; + ai_assert(nullptr != anim); + + if (pcIn->aCameraRollKeys.size() > 1) { + ASSIMP_LOG_VERBOSE_DEBUG("3DS: Converting camera roll track ..."); + + // Camera roll keys - in fact they're just rotations + // around the camera's z axis. The angles are given + // in degrees (and they're clockwise). + pcIn->aRotationKeys.resize(pcIn->aCameraRollKeys.size()); + for (unsigned int i = 0; i < pcIn->aCameraRollKeys.size(); ++i) { + aiQuatKey &q = pcIn->aRotationKeys[i]; + aiFloatKey &f = pcIn->aCameraRollKeys[i]; + + q.mTime = f.mTime; + + // FIX to get to Assimp quaternion conventions + q.mValue = aiQuaternion(0.f, 0.f, AI_DEG_TO_RAD(/*-*/ f.mValue)); + } + } +#if 0 + if (pcIn->aTargetPositionKeys.size() > 1) + { + ASSIMP_LOG_VERBOSE_DEBUG("3DS: Converting target track ..."); + + // Camera or spot light - need to convert the separate + // target position channel to our representation + TargetAnimationHelper helper; + + if (pcIn->aPositionKeys.empty()) + { + // We can just pass zero here ... + helper.SetFixedMainAnimationChannel(aiVector3D()); + } + else helper.SetMainAnimationChannel(&pcIn->aPositionKeys); + helper.SetTargetAnimationChannel(&pcIn->aTargetPositionKeys); + + // Do the conversion + std::vector<aiVectorKey> distanceTrack; + helper.Process(&distanceTrack); + + // Now add a new node as child, name it <ourName>.Target + // and assign the distance track to it. This is that the + // information where the target is and how it moves is + // not lost + D3DS::Node* nd = new D3DS::Node(); + pcIn->push_back(nd); + + nd->mName = pcIn->mName + ".Target"; + + aiNodeAnim* nda = anim->mChannels[anim->mNumChannels++] = new aiNodeAnim(); + nda->mNodeName.Set(nd->mName); + + nda->mNumPositionKeys = (unsigned int)distanceTrack.size(); + nda->mPositionKeys = new aiVectorKey[nda->mNumPositionKeys]; + ::memcpy(nda->mPositionKeys,&distanceTrack[0], + sizeof(aiVectorKey)*nda->mNumPositionKeys); + } +#endif + + // Cameras or lights define their transformation in their parent node and in the + // corresponding light or camera chunks. However, we read and process the latter + // to to be able to return valid cameras/lights even if no scenegraph is given. + for (unsigned int n = 0; n < pcSOut->mNumCameras; ++n) { + if (pcSOut->mCameras[n]->mName == pcOut->mName) { + pcSOut->mCameras[n]->mLookAt = aiVector3D(0.f, 0.f, 1.f); + } + } + for (unsigned int n = 0; n < pcSOut->mNumLights; ++n) { + if (pcSOut->mLights[n]->mName == pcOut->mName) { + pcSOut->mLights[n]->mDirection = aiVector3D(0.f, 0.f, 1.f); + } + } + + // Allocate a new node anim and setup its name + aiNodeAnim *nda = anim->mChannels[anim->mNumChannels++] = new aiNodeAnim(); + nda->mNodeName.Set(pcIn->mName); + + // POSITION keys + if (pcIn->aPositionKeys.size() > 0) { + nda->mNumPositionKeys = (unsigned int)pcIn->aPositionKeys.size(); + nda->mPositionKeys = new aiVectorKey[nda->mNumPositionKeys]; + ::memcpy(nda->mPositionKeys, &pcIn->aPositionKeys[0], + sizeof(aiVectorKey) * nda->mNumPositionKeys); + } + + // ROTATION keys + if (pcIn->aRotationKeys.size() > 0) { + nda->mNumRotationKeys = (unsigned int)pcIn->aRotationKeys.size(); + nda->mRotationKeys = new aiQuatKey[nda->mNumRotationKeys]; + + // Rotations are quaternion offsets + aiQuaternion abs1; + for (unsigned int n = 0; n < nda->mNumRotationKeys; ++n) { + const aiQuatKey &q = pcIn->aRotationKeys[n]; + + abs1 = (n ? abs1 * q.mValue : q.mValue); + nda->mRotationKeys[n].mTime = q.mTime; + nda->mRotationKeys[n].mValue = abs1.Normalize(); + } + } + + // SCALING keys + if (pcIn->aScalingKeys.size() > 0) { + nda->mNumScalingKeys = (unsigned int)pcIn->aScalingKeys.size(); + nda->mScalingKeys = new aiVectorKey[nda->mNumScalingKeys]; + ::memcpy(nda->mScalingKeys, &pcIn->aScalingKeys[0], + sizeof(aiVectorKey) * nda->mNumScalingKeys); + } + } + + // Allocate storage for children + pcOut->mNumChildren = (unsigned int)pcIn->mChildren.size(); + pcOut->mChildren = new aiNode *[pcIn->mChildren.size()]; + + // Recursively process all children + const unsigned int size = static_cast<unsigned int>(pcIn->mChildren.size()); + for (unsigned int i = 0; i < size; ++i) { + pcOut->mChildren[i] = new aiNode(); + pcOut->mChildren[i]->mParent = pcOut; + AddNodeToGraph(pcSOut, pcOut->mChildren[i], pcIn->mChildren[i], abs); + } +} + +// ------------------------------------------------------------------------------------------------ +// Find out how many node animation channels we'll have finally +void CountTracks(D3DS::Node *node, unsigned int &cnt) { + ////////////////////////////////////////////////////////////////////////////// + // We will never generate more than one channel for a node, so + // this is rather easy here. + + if (node->aPositionKeys.size() > 1 || node->aRotationKeys.size() > 1 || + node->aScalingKeys.size() > 1 || node->aCameraRollKeys.size() > 1 || + node->aTargetPositionKeys.size() > 1) { + ++cnt; + + // account for the additional channel for the camera/spotlight target position + if (node->aTargetPositionKeys.size() > 1) ++cnt; + } + + // Recursively process all children + for (unsigned int i = 0; i < node->mChildren.size(); ++i) + CountTracks(node->mChildren[i], cnt); +} + +// ------------------------------------------------------------------------------------------------ +// Generate the output node graph +void Discreet3DSImporter::GenerateNodeGraph(aiScene *pcOut) { + pcOut->mRootNode = new aiNode(); + if (0 == mRootNode->mChildren.size()) { + ////////////////////////////////////////////////////////////////////////////// + // It seems the file is so messed up that it has not even a hierarchy. + // generate a flat hiearachy which looks like this: + // + // ROOT_NODE + // | + // ---------------------------------------- + // | | | | | + // MESH_0 MESH_1 MESH_2 ... MESH_N CAMERA_0 .... + // + ASSIMP_LOG_WARN("No hierarchy information has been found in the file. "); + + pcOut->mRootNode->mNumChildren = pcOut->mNumMeshes + + static_cast<unsigned int>(mScene->mCameras.size() + mScene->mLights.size()); + + pcOut->mRootNode->mChildren = new aiNode *[pcOut->mRootNode->mNumChildren]; + pcOut->mRootNode->mName.Set("<3DSDummyRoot>"); + + // Build dummy nodes for all meshes + unsigned int a = 0; + for (unsigned int i = 0; i < pcOut->mNumMeshes; ++i, ++a) { + aiNode *pcNode = pcOut->mRootNode->mChildren[a] = new aiNode(); + pcNode->mParent = pcOut->mRootNode; + pcNode->mMeshes = new unsigned int[1]; + pcNode->mMeshes[0] = i; + pcNode->mNumMeshes = 1; + + // Build a name for the node + pcNode->mName.length = ai_snprintf(pcNode->mName.data, MAXLEN, "3DSMesh_%u", i); + } + + // Build dummy nodes for all cameras + for (unsigned int i = 0; i < (unsigned int)mScene->mCameras.size(); ++i, ++a) { + aiNode *pcNode = pcOut->mRootNode->mChildren[a] = new aiNode(); + pcNode->mParent = pcOut->mRootNode; + + // Build a name for the node + pcNode->mName = mScene->mCameras[i]->mName; + } + + // Build dummy nodes for all lights + for (unsigned int i = 0; i < (unsigned int)mScene->mLights.size(); ++i, ++a) { + aiNode *pcNode = pcOut->mRootNode->mChildren[a] = new aiNode(); + pcNode->mParent = pcOut->mRootNode; + + // Build a name for the node + pcNode->mName = mScene->mLights[i]->mName; + } + } else { + // First of all: find out how many scaling, rotation and translation + // animation tracks we'll have afterwards + unsigned int numChannel = 0; + CountTracks(mRootNode, numChannel); + + if (numChannel) { + // Allocate a primary animation channel + pcOut->mNumAnimations = 1; + pcOut->mAnimations = new aiAnimation *[1]; + aiAnimation *anim = pcOut->mAnimations[0] = new aiAnimation(); + + anim->mName.Set("3DSMasterAnim"); + + // Allocate enough storage for all node animation channels, + // but don't set the mNumChannels member - we'll use it to + // index into the array + anim->mChannels = new aiNodeAnim *[numChannel]; + } + + aiMatrix4x4 m; + AddNodeToGraph(pcOut, pcOut->mRootNode, mRootNode, m); + } + + // We used the first and second vertex color set to store some temporary values so we need to cleanup here + for (unsigned int a = 0; a < pcOut->mNumMeshes; ++a) { + pcOut->mMeshes[a]->mColors[0] = nullptr; + pcOut->mMeshes[a]->mColors[1] = nullptr; + } + + pcOut->mRootNode->mTransformation = aiMatrix4x4( + 1.f, 0.f, 0.f, 0.f, + 0.f, 0.f, 1.f, 0.f, + 0.f, -1.f, 0.f, 0.f, + 0.f, 0.f, 0.f, 1.f) * + pcOut->mRootNode->mTransformation; + + // If the root node is unnamed name it "<3DSRoot>" + if (::strstr(pcOut->mRootNode->mName.data, "UNNAMED") || + (pcOut->mRootNode->mName.data[0] == '$' && pcOut->mRootNode->mName.data[1] == '$')) { + pcOut->mRootNode->mName.Set("<3DSRoot>"); + } +} + +// ------------------------------------------------------------------------------------------------ +// Convert all meshes in the scene and generate the final output scene. +void Discreet3DSImporter::ConvertScene(aiScene *pcOut) { + // Allocate enough storage for all output materials + pcOut->mNumMaterials = (unsigned int)mScene->mMaterials.size(); + pcOut->mMaterials = new aiMaterial *[pcOut->mNumMaterials]; + + // ... and convert the 3DS materials to aiMaterial's + for (unsigned int i = 0; i < pcOut->mNumMaterials; ++i) { + aiMaterial *pcNew = new aiMaterial(); + ConvertMaterial(mScene->mMaterials[i], *pcNew); + pcOut->mMaterials[i] = pcNew; + } + + // Generate the output mesh list + ConvertMeshes(pcOut); + + // Now copy all light sources to the output scene + pcOut->mNumLights = (unsigned int)mScene->mLights.size(); + if (pcOut->mNumLights) { + pcOut->mLights = new aiLight *[pcOut->mNumLights]; + ::memcpy(pcOut->mLights, &mScene->mLights[0], sizeof(void *) * pcOut->mNumLights); + } + + // Now copy all cameras to the output scene + pcOut->mNumCameras = (unsigned int)mScene->mCameras.size(); + if (pcOut->mNumCameras) { + pcOut->mCameras = new aiCamera *[pcOut->mNumCameras]; + ::memcpy(pcOut->mCameras, &mScene->mCameras[0], sizeof(void *) * pcOut->mNumCameras); + } +} + +#endif // !! ASSIMP_BUILD_NO_3DS_IMPORTER |