delete src/mesh/assimp-master

1 files changed, 0 insertions, 1353 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp b/src/mesh/assimp-master/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp
deleted file mode 100644
index 93d3753..0000000
--- a/src/mesh/assimp-master/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp
+++ /dev/null
@@ -1,1353 +0,0 @@
-/*
----------------------------------------------------------------------------
-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 HL1MDLLoader.cpp
- *  @brief Implementation for the Half-Life 1 MDL loader.
- */
-
-#include "HL1MDLLoader.h"
-#include "HL1ImportDefinitions.h"
-#include "HL1MeshTrivert.h"
-#include "UniqueNameGenerator.h"
-
-#include <assimp/BaseImporter.h>
-#include <assimp/StringUtils.h>
-#include <assimp/ai_assert.h>
-#include <assimp/qnan.h>
-#include <assimp/DefaultLogger.hpp>
-#include <assimp/Importer.hpp>
-
-#include <iomanip>
-#include <sstream>
-#include <map>
-
-#ifdef MDL_HALFLIFE_LOG_WARN_HEADER
-#undef MDL_HALFLIFE_LOG_WARN_HEADER
-#endif
-#define MDL_HALFLIFE_LOG_HEADER "[Half-Life 1 MDL] "
-#include "LogFunctions.h"
-
-namespace Assimp {
-namespace MDL {
-namespace HalfLife {
-
-#ifdef _MSC_VER
-#    pragma warning(disable : 4706)
-#endif // _MSC_VER
-
-// ------------------------------------------------------------------------------------------------
-HL1MDLLoader::HL1MDLLoader(
-    aiScene *scene,
-    IOSystem *io,
-    const unsigned char *buffer,
-    const std::string &file_path,
-    const HL1ImportSettings &import_settings) :
-    scene_(scene),
-    io_(io),
-    buffer_(buffer),
-    file_path_(file_path),
-    import_settings_(import_settings),
-    header_(nullptr),
-    texture_header_(nullptr),
-    anim_headers_(nullptr),
-    texture_buffer_(nullptr),
-    anim_buffers_(nullptr),
-    num_sequence_groups_(0),
-    rootnode_children_(),
-    unique_name_generator_(),
-    unique_sequence_names_(),
-    unique_sequence_groups_names_(),
-    temp_bones_(),
-    num_blend_controllers_(0),
-    total_models_(0) {
-    load_file();
-}
-
-// ------------------------------------------------------------------------------------------------
-HL1MDLLoader::~HL1MDLLoader() {
-    release_resources();
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::release_resources() {
-    if (buffer_ != texture_buffer_) {
-        delete[] texture_buffer_;
-        texture_buffer_ = nullptr;
-    }
-
-    if (num_sequence_groups_ && anim_buffers_) {
-        for (int i = 1; i < num_sequence_groups_; ++i) {
-            if (anim_buffers_[i]) {
-                delete[] anim_buffers_[i];
-                anim_buffers_[i] = nullptr;
-            }
-        }
-
-        delete[] anim_buffers_;
-        anim_buffers_ = nullptr;
-    }
-
-    if (anim_headers_) {
-        delete[] anim_headers_;
-        anim_headers_ = nullptr;
-    }
-
-    // Root has some children nodes. so let's proceed them
-    if (!rootnode_children_.empty()) {
-        // Here, it means that the nodes were not added to the
-        // scene root node. We still have to delete them.
-        for (auto it = rootnode_children_.begin(); it != rootnode_children_.end(); ++it) {
-            if (*it) {
-                delete *it;
-            }
-        }
-        // Ensure this happens only once.
-        rootnode_children_.clear();
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::load_file() {
-    try {
-        header_ = (const Header_HL1 *)buffer_;
-        validate_header(header_, false);
-
-        // Create the root scene node.
-        scene_->mRootNode = new aiNode(AI_MDL_HL1_NODE_ROOT);
-
-        load_texture_file();
-
-        if (import_settings_.read_animations) {
-            load_sequence_groups_files();
-        }
-
-        read_textures();
-        read_skins();
-
-        read_bones();
-        read_meshes();
-
-        if (import_settings_.read_animations) {
-            read_sequence_groups_info();
-            read_animations();
-            read_sequence_infos();
-            if (import_settings_.read_sequence_transitions)
-                read_sequence_transitions();
-        }
-
-        if (import_settings_.read_attachments) {
-            read_attachments();
-        }
-
-        if (import_settings_.read_hitboxes) {
-            read_hitboxes();
-        }
-
-        if (import_settings_.read_bone_controllers) {
-            read_bone_controllers();
-        }
-
-        read_global_info();
-
-        if (!header_->numbodyparts) {
-            // This could be an MDL external texture file. In this case,
-            // add this flag to allow the scene to be loaded even if it
-            // has no meshes.
-            scene_->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
-        }
-
-        // Append children to root node.
-        if (rootnode_children_.size()) {
-            scene_->mRootNode->addChildren(
-                    static_cast<unsigned int>(rootnode_children_.size()),
-                    rootnode_children_.data());
-
-            // Clear the list of nodes so they will not be destroyed
-            // when resources are released.
-            rootnode_children_.clear();
-        }
-
-        release_resources();
-
-    } catch (...) {
-        release_resources();
-        throw;
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::validate_header(const Header_HL1 *header, bool is_texture_header) {
-    if (is_texture_header) {
-        // Every single Half-Life model is assumed to have at least one texture.
-        if (!header->numtextures) {
-            throw DeadlyImportError(MDL_HALFLIFE_LOG_HEADER "There are no textures in the file");
-        }
-
-        if (header->numtextures > AI_MDL_HL1_MAX_TEXTURES) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_TEXTURES>(header->numtextures, "textures");
-        }
-
-        if (header->numskinfamilies > AI_MDL_HL1_MAX_SKIN_FAMILIES) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_SKIN_FAMILIES>(header->numskinfamilies, "skin families");
-        }
-
-    } else {
-
-        if (header->numbodyparts > AI_MDL_HL1_MAX_BODYPARTS) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_BODYPARTS>(header->numbodyparts, "bodyparts");
-        }
-
-        if (header->numbones > AI_MDL_HL1_MAX_BONES) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_BONES>(header->numbones, "bones");
-        }
-
-        if (header->numbonecontrollers > AI_MDL_HL1_MAX_BONE_CONTROLLERS) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_BONE_CONTROLLERS>(header->numbonecontrollers, "bone controllers");
-        }
-
-        if (header->numseq > AI_MDL_HL1_MAX_SEQUENCES) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_SEQUENCES>(header->numseq, "sequences");
-        }
-
-        if (header->numseqgroups > AI_MDL_HL1_MAX_SEQUENCE_GROUPS) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_SEQUENCE_GROUPS>(header->numseqgroups, "sequence groups");
-        }
-
-        if (header->numattachments > AI_MDL_HL1_MAX_ATTACHMENTS) {
-            log_warning_limit_exceeded<AI_MDL_HL1_MAX_ATTACHMENTS>(header->numattachments, "attachments");
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-/*
-    Load textures.
-
-    There are two ways for textures to be stored in a Half-Life model:
-
-    1. Directly in the MDL file (filePath) or
-    2. In an external MDL file.
-
-    Due to the way StudioMDL works (tool used to compile SMDs into MDLs),
-    it is assumed that an external texture file follows the naming
-    convention: <YourModelName>T.mdl. Note the extra (T) at the end of the
-    model name.
-
-    .e.g For a given model named MyModel.mdl
-
-    The external texture file name would be MyModelT.mdl
-*/
-void HL1MDLLoader::load_texture_file() {
-    if (header_->numtextures == 0) {
-        // Load an external MDL texture file.
-        std::string texture_file_path =
-                DefaultIOSystem::absolutePath(file_path_) + io_->getOsSeparator() +
-                DefaultIOSystem::completeBaseName(file_path_) + "T." +
-                BaseImporter::GetExtension(file_path_);
-
-        load_file_into_buffer<Header_HL1>(texture_file_path, texture_buffer_);
-    } else {
-        // Model has no external texture file. This means the texture is stored inside the main MDL file.
-        texture_buffer_ = const_cast<unsigned char *>(buffer_);
-    }
-
-    texture_header_ = (const Header_HL1 *)texture_buffer_;
-
-    // Validate texture header.
-    validate_header(texture_header_, true);
-}
-
-// ------------------------------------------------------------------------------------------------
-/*
-    Load sequence group files if any.
-
-    Due to the way StudioMDL works (tool used to compile SMDs into MDLs),
-    it is assumed that a sequence group file follows the naming
-    convention: <YourModelName>0X.mdl. Note the extra (0X) at the end of
-    the model name, where (X) is the sequence group.
-
-    .e.g For a given model named MyModel.mdl
-
-    Sequence group 1 => MyModel01.mdl
-    Sequence group 2 => MyModel02.mdl
-    Sequence group X => MyModel0X.mdl
-
-*/
-void HL1MDLLoader::load_sequence_groups_files() {
-    if (header_->numseqgroups <= 1) {
-        return;
-    }
-
-    num_sequence_groups_ = header_->numseqgroups;
-
-    anim_buffers_ = new unsigned char *[num_sequence_groups_];
-    anim_headers_ = new SequenceHeader_HL1 *[num_sequence_groups_];
-    for (int i = 0; i < num_sequence_groups_; ++i) {
-        anim_buffers_[i] = nullptr;
-        anim_headers_[i] = nullptr;
-    }
-
-    std::string file_path_without_extension =
-            DefaultIOSystem::absolutePath(file_path_) +
-            io_->getOsSeparator() +
-            DefaultIOSystem::completeBaseName(file_path_);
-
-    for (int i = 1; i < num_sequence_groups_; ++i) {
-        std::stringstream ss;
-        ss << file_path_without_extension;
-        ss << std::setw(2) << std::setfill('0') << i;
-        ss << '.' << BaseImporter::GetExtension(file_path_);
-
-        std::string sequence_file_path = ss.str();
-
-        load_file_into_buffer<SequenceHeader_HL1>(sequence_file_path, anim_buffers_[i]);
-
-        anim_headers_[i] = (SequenceHeader_HL1 *)anim_buffers_[i];
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// Read an MDL texture.
-void HL1MDLLoader::read_texture(const Texture_HL1 *ptexture,
-        uint8_t *data, uint8_t *pal, aiTexture *pResult,
-        aiColor3D &last_palette_color) {
-    pResult->mFilename = ptexture->name;
-    pResult->mWidth = static_cast<unsigned int>(ptexture->width);
-    pResult->mHeight = static_cast<unsigned int>(ptexture->height);
-    pResult->achFormatHint[0] = 'r';
-    pResult->achFormatHint[1] = 'g';
-    pResult->achFormatHint[2] = 'b';
-    pResult->achFormatHint[3] = 'a';
-    pResult->achFormatHint[4] = '8';
-    pResult->achFormatHint[5] = '8';
-    pResult->achFormatHint[6] = '8';
-    pResult->achFormatHint[7] = '8';
-    pResult->achFormatHint[8] = '\0';
-
-    const size_t num_pixels = pResult->mWidth * pResult->mHeight;
-    aiTexel *out = pResult->pcData = new aiTexel[num_pixels];
-
-    // Convert indexed 8 bit to 32 bit RGBA.
-    for (size_t i = 0; i < num_pixels; ++i, ++out) {
-        out->r = pal[data[i] * 3];
-        out->g = pal[data[i] * 3 + 1];
-        out->b = pal[data[i] * 3 + 2];
-        out->a = 255;
-    }
-
-    // Get the last palette color.
-    last_palette_color.r = pal[255 * 3];
-    last_palette_color.g = pal[255 * 3 + 1];
-    last_palette_color.b = pal[255 * 3 + 2];
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_textures() {
-    const Texture_HL1 *ptexture = (const Texture_HL1 *)((uint8_t *)texture_header_ + texture_header_->textureindex);
-    unsigned char *pin = texture_buffer_;
-
-    scene_->mNumTextures = scene_->mNumMaterials = texture_header_->numtextures;
-    scene_->mTextures = new aiTexture *[scene_->mNumTextures];
-    scene_->mMaterials = new aiMaterial *[scene_->mNumMaterials];
-
-    for (int i = 0; i < texture_header_->numtextures; ++i) {
-        scene_->mTextures[i] = new aiTexture();
-
-        aiColor3D last_palette_color;
-        read_texture(&ptexture[i],
-                pin + ptexture[i].index,
-                pin + ptexture[i].width * ptexture[i].height + ptexture[i].index,
-                scene_->mTextures[i],
-                last_palette_color);
-
-        aiMaterial *scene_material = scene_->mMaterials[i] = new aiMaterial();
-
-        const aiTextureType texture_type = aiTextureType_DIFFUSE;
-        aiString texture_name(ptexture[i].name);
-        scene_material->AddProperty(&texture_name, AI_MATKEY_TEXTURE(texture_type, 0));
-
-        // Is this a chrome texture?
-        int chrome = ptexture[i].flags & AI_MDL_HL1_STUDIO_NF_CHROME ? 1 : 0;
-        scene_material->AddProperty(&chrome, 1, AI_MDL_HL1_MATKEY_CHROME(texture_type, 0));
-
-        if (ptexture[i].flags & AI_MDL_HL1_STUDIO_NF_FLATSHADE) {
-            // Flat shading.
-            const aiShadingMode shading_mode = aiShadingMode_Flat;
-            scene_material->AddProperty(&shading_mode, 1, AI_MATKEY_SHADING_MODEL);
-        }
-
-        if (ptexture[i].flags & AI_MDL_HL1_STUDIO_NF_ADDITIVE) {
-            // Additive texture.
-            const aiBlendMode blend_mode = aiBlendMode_Additive;
-            scene_material->AddProperty(&blend_mode, 1, AI_MATKEY_BLEND_FUNC);
-        } else if (ptexture[i].flags & AI_MDL_HL1_STUDIO_NF_MASKED) {
-            // Texture with 1 bit alpha test.
-            const aiTextureFlags use_alpha = aiTextureFlags_UseAlpha;
-            scene_material->AddProperty(&use_alpha, 1, AI_MATKEY_TEXFLAGS(texture_type, 0));
-            scene_material->AddProperty(&last_palette_color, 1, AI_MATKEY_COLOR_TRANSPARENT);
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_skins() {
-    // Read skins, if any.
-    if (texture_header_->numskinfamilies <= 1) {
-        return;
-    }
-
-    // Pointer to base texture index.
-    short *default_skin_ptr = (short *)((uint8_t *)texture_header_ + texture_header_->skinindex);
-
-    // Start at first replacement skin.
-    short *replacement_skin_ptr = default_skin_ptr + texture_header_->numskinref;
-
-    for (int i = 1; i < texture_header_->numskinfamilies; ++i, replacement_skin_ptr += texture_header_->numskinref) {
-        for (int j = 0; j < texture_header_->numskinref; ++j) {
-            if (default_skin_ptr[j] != replacement_skin_ptr[j]) {
-                // Save replacement textures.
-                aiString skinMaterialId(scene_->mTextures[replacement_skin_ptr[j]]->mFilename);
-                scene_->mMaterials[default_skin_ptr[j]]->AddProperty(&skinMaterialId, AI_MATKEY_TEXTURE_DIFFUSE(i));
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_bones() {
-    if (!header_->numbones) {
-        return;
-    }
-
-    const Bone_HL1 *pbone = (const Bone_HL1 *)((uint8_t *)header_ + header_->boneindex);
-
-    std::vector<std::string> unique_bones_names(header_->numbones);
-    for (int i = 0; i < header_->numbones; ++i) {
-        unique_bones_names[i] = pbone[i].name;
-    }
-
-    // Ensure bones have unique names.
-    unique_name_generator_.set_template_name("Bone");
-    unique_name_generator_.make_unique(unique_bones_names);
-
-    temp_bones_.resize(header_->numbones);
-
-    aiNode *bones_node = new aiNode(AI_MDL_HL1_NODE_BONES);
-    rootnode_children_.push_back(bones_node);
-    bones_node->mNumChildren = static_cast<unsigned int>(header_->numbones);
-    bones_node->mChildren = new aiNode *[bones_node->mNumChildren];
-
-    // Create bone matrices in local space.
-    for (int i = 0; i < header_->numbones; ++i) {
-        aiNode *bone_node = temp_bones_[i].node = bones_node->mChildren[i] = new aiNode(unique_bones_names[i]);
-
-        aiVector3D angles(pbone[i].value[3], pbone[i].value[4], pbone[i].value[5]);
-        temp_bones_[i].absolute_transform = bone_node->mTransformation =
-                aiMatrix4x4(aiVector3D(1), aiQuaternion(angles.y, angles.z, angles.x),
-                        aiVector3D(pbone[i].value[0], pbone[i].value[1], pbone[i].value[2]));
-
-        if (pbone[i].parent == -1) {
-            bone_node->mParent = scene_->mRootNode;
-        } else {
-            bone_node->mParent = bones_node->mChildren[pbone[i].parent];
-
-            temp_bones_[i].absolute_transform =
-                    temp_bones_[pbone[i].parent].absolute_transform * bone_node->mTransformation;
-        }
-
-        temp_bones_[i].offset_matrix = temp_bones_[i].absolute_transform;
-        temp_bones_[i].offset_matrix.Inverse();
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-/*
-    Read meshes.
-
-    Half-Life MDLs are structured such that each MDL
-    contains one or more 'bodypart(s)', which contain one
-    or more 'model(s)', which contains one or more mesh(es).
-
-    * Bodyparts are used to group models that may be replaced
-    in the game .e.g a character could have a 'heads' group,
-    'torso' group, 'shoes' group, with each group containing
-    different 'model(s)'.
-
-    * Models, also called 'sub models', contain vertices as
-    well as a reference to each mesh used by the sub model.
-
-    * Meshes contain a list of tris, also known as 'triverts'.
-    Each tris contains the following information:
-
-        1. The index of the position to use for the vertex.
-        2. The index of the normal to use for the vertex.
-        3. The S coordinate to use for the vertex UV.
-        4. The T coordinate ^
-
-    These tris represent the way to represent the triangles
-    for each mesh. Depending on how the tool compiled the MDL,
-    those triangles were saved as strips and or fans.
-
-    NOTE: Each tris is NOT unique. This means that you
-    might encounter the same vertex index but with a different
-    normal index, S coordinate, T coordinate.
-
-    In addition, each mesh contains the texture's index.
-
-    ------------------------------------------------------
-    With the details above, there are several things to
-    take into consideration.
-
-    * The Half-Life models store the vertices by sub model
-    rather than by mesh. Due to Assimp's structure, it
-    is necessary to remap each model vertex to be used
-    per mesh. Unfortunately, this has the consequence
-    to duplicate vertices.
-
-    * Because the mesh triangles are comprised of strips and
-    fans, it is necessary to convert each primitive to
-    triangles, respectively (3 indices per face).
-*/
-void HL1MDLLoader::read_meshes() {
-    if (!header_->numbodyparts) {
-        return;
-    }
-
-    int total_verts = 0;
-    int total_triangles = 0;
-    total_models_ = 0;
-
-    const Bodypart_HL1 *pbodypart = (const Bodypart_HL1 *)((uint8_t *)header_ + header_->bodypartindex);
-    const Model_HL1 *pmodel = nullptr;
-    const Mesh_HL1 *pmesh = nullptr;
-
-    const Texture_HL1 *ptexture = (const Texture_HL1 *)((uint8_t *)texture_header_ + texture_header_->textureindex);
-    short *pskinref = (short *)((uint8_t *)texture_header_ + texture_header_->skinindex);
-
-    scene_->mNumMeshes = 0;
-
-    std::vector<std::string> unique_bodyparts_names;
-    unique_bodyparts_names.resize(header_->numbodyparts);
-
-    // Count the number of meshes.
-
-    for (int i = 0; i < header_->numbodyparts; ++i, ++pbodypart) {
-        unique_bodyparts_names[i] = pbodypart->name;
-
-        pmodel = (Model_HL1 *)((uint8_t *)header_ + pbodypart->modelindex);
-        for (int j = 0; j < pbodypart->nummodels; ++j, ++pmodel) {
-            scene_->mNumMeshes += pmodel->nummesh;
-            total_verts += pmodel->numverts;
-        }
-
-        total_models_ += pbodypart->nummodels;
-    }
-
-    // Display limit infos.
-    if (total_verts > AI_MDL_HL1_MAX_VERTICES) {
-        log_warning_limit_exceeded<AI_MDL_HL1_MAX_VERTICES>(total_verts, "vertices");
-    }
-
-    if (scene_->mNumMeshes > AI_MDL_HL1_MAX_MESHES) {
-        log_warning_limit_exceeded<AI_MDL_HL1_MAX_MESHES>(scene_->mNumMeshes, "meshes");
-    }
-
-    if (total_models_ > AI_MDL_HL1_MAX_MODELS) {
-        log_warning_limit_exceeded<AI_MDL_HL1_MAX_MODELS>(total_models_, "models");
-    }
-
-    // Ensure bodyparts have unique names.
-    unique_name_generator_.set_template_name("Bodypart");
-    unique_name_generator_.make_unique(unique_bodyparts_names);
-
-    // Now do the same for each model.
-    pbodypart = (const Bodypart_HL1 *)((uint8_t *)header_ + header_->bodypartindex);
-
-    // Prepare template name for bodypart models.
-    std::vector<std::string> unique_models_names;
-    unique_models_names.resize(total_models_);
-
-    unsigned int model_index = 0;
-
-    for (int i = 0; i < header_->numbodyparts; ++i, ++pbodypart) {
-        pmodel = (Model_HL1 *)((uint8_t *)header_ + pbodypart->modelindex);
-        for (int j = 0; j < pbodypart->nummodels; ++j, ++pmodel, ++model_index)
-            unique_models_names[model_index] = pmodel->name;
-    }
-
-    unique_name_generator_.set_template_name("Model");
-    unique_name_generator_.make_unique(unique_models_names);
-
-    unsigned int mesh_index = 0;
-
-    scene_->mMeshes = new aiMesh *[scene_->mNumMeshes];
-
-    pbodypart = (const Bodypart_HL1 *)((uint8_t *)header_ + header_->bodypartindex);
-
-    /* Create a node that will represent the mesh hierarchy.
-
-        <MDL_bodyparts>
-            |
-            +-- bodypart --+-- model -- [mesh index, mesh index, ...]
-            |              |
-            |              +-- model -- [mesh index, mesh index, ...]
-            |              |
-            |              ...
-            |
-            |-- bodypart -- ...
-            |
-            ...
-     */
-    aiNode *bodyparts_node = new aiNode(AI_MDL_HL1_NODE_BODYPARTS);
-    rootnode_children_.push_back(bodyparts_node);
-    bodyparts_node->mNumChildren = static_cast<unsigned int>(header_->numbodyparts);
-    bodyparts_node->mChildren = new aiNode *[bodyparts_node->mNumChildren];
-    aiNode **bodyparts_node_ptr = bodyparts_node->mChildren;
-
-    // The following variables are defined here so they don't have
-    // to be recreated every iteration.
-
-    // Model_HL1 vertices, in bind pose space.
-    std::vector<aiVector3D> bind_pose_vertices;
-
-    // Model_HL1 normals, in bind pose space.
-    std::vector<aiVector3D> bind_pose_normals;
-
-    // Used to contain temporary information for building a mesh.
-    std::vector<HL1MeshTrivert> triverts;
-
-    std::vector<short> tricmds;
-
-    // Which triverts to use for the mesh.
-    std::vector<short> mesh_triverts_indices;
-
-    std::vector<HL1MeshFace> mesh_faces;
-
-    /* triverts that have the same vertindex, but have different normindex,s,t values.
-       Similar triverts are mapped from vertindex to a list of similar triverts. */
-    std::map<short, std::set<short>> triverts_similars;
-
-    // triverts per bone.
-    std::map<int, std::set<short>> bone_triverts;
-
-    /** This function adds a trivert index to the list of triverts per bone.
-     * \param[in] bone The bone that affects the trivert at index \p trivert_index.
-     * \param[in] trivert_index The trivert index.
-     */
-    auto AddTrivertToBone = [&](int bone, short trivert_index) {
-        if (bone_triverts.count(bone) == 0)
-            bone_triverts.insert({ bone, std::set<short>{ trivert_index }});
-        else
-            bone_triverts[bone].insert(trivert_index);
-    };
-
-    /** This function creates and appends a new trivert to the list of triverts.
-     * \param[in] trivert The trivert to use as a prototype.
-     * \param[in] bone The bone that affects \p trivert.
-     */
-    auto AddSimilarTrivert = [&](const Trivert &trivert, const int bone) {
-        HL1MeshTrivert new_trivert(trivert);
-        new_trivert.localindex = static_cast<short>(mesh_triverts_indices.size());
-
-        short new_trivert_index = static_cast<short>(triverts.size());
-
-        if (triverts_similars.count(trivert.vertindex) == 0)
-            triverts_similars.insert({ trivert.vertindex, std::set<short>{ new_trivert_index }});
-        else
-            triverts_similars[trivert.vertindex].insert(new_trivert_index);
-
-        triverts.push_back(new_trivert);
-
-        mesh_triverts_indices.push_back(new_trivert_index);
-        tricmds.push_back(new_trivert.localindex);
-        AddTrivertToBone(bone, new_trivert.localindex);
-    };
-
-    model_index = 0;
-
-    for (int i = 0; i < header_->numbodyparts; ++i, ++pbodypart, ++bodyparts_node_ptr) {
-        pmodel = (const Model_HL1 *)((uint8_t *)header_ + pbodypart->modelindex);
-
-        // Create bodypart node for the mesh tree hierarchy.
-        aiNode *bodypart_node = (*bodyparts_node_ptr) = new aiNode(unique_bodyparts_names[i]);
-        bodypart_node->mParent = bodyparts_node;
-        bodypart_node->mMetaData = aiMetadata::Alloc(1);
-        bodypart_node->mMetaData->Set(0, "Base", pbodypart->base);
-
-        bodypart_node->mNumChildren = static_cast<unsigned int>(pbodypart->nummodels);
-        bodypart_node->mChildren = new aiNode *[bodypart_node->mNumChildren];
-        aiNode **bodypart_models_ptr = bodypart_node->mChildren;
-
-        for (int j = 0; j < pbodypart->nummodels;
-                ++j, ++pmodel, ++bodypart_models_ptr, ++model_index) {
-
-            pmesh = (const Mesh_HL1 *)((uint8_t *)header_ + pmodel->meshindex);
-
-            uint8_t *pvertbone = ((uint8_t *)header_ + pmodel->vertinfoindex);
-            uint8_t *pnormbone = ((uint8_t *)header_ + pmodel->norminfoindex);
-            vec3_t *pstudioverts = (vec3_t *)((uint8_t *)header_ + pmodel->vertindex);
-            vec3_t *pstudionorms = (vec3_t *)((uint8_t *)header_ + pmodel->normindex);
-
-            // Each vertex and normal is in local space, so transform
-            // each of them to bring them in bind pose.
-            bind_pose_vertices.resize(pmodel->numverts);
-            bind_pose_normals.resize(pmodel->numnorms);
-            for (size_t k = 0; k < bind_pose_vertices.size(); ++k) {
-                const vec3_t &vert = pstudioverts[k];
-                bind_pose_vertices[k] = temp_bones_[pvertbone[k]].absolute_transform * aiVector3D(vert[0], vert[1], vert[2]);
-            }
-            for (size_t k = 0; k < bind_pose_normals.size(); ++k) {
-                const vec3_t &norm = pstudionorms[k];
-                // Compute the normal matrix to transform the normal into bind pose,
-                // without affecting its length.
-                const aiMatrix4x4 normal_matrix = aiMatrix4x4(temp_bones_[pnormbone[k]].absolute_transform).Inverse().Transpose();
-                bind_pose_normals[k] = normal_matrix * aiVector3D(norm[0], norm[1], norm[2]);
-            }
-
-            // Create model node for the mesh tree hierarchy.
-            aiNode *model_node = (*bodypart_models_ptr) = new aiNode(unique_models_names[model_index]);
-            model_node->mParent = bodypart_node;
-            model_node->mNumMeshes = static_cast<unsigned int>(pmodel->nummesh);
-            model_node->mMeshes = new unsigned int[model_node->mNumMeshes];
-            unsigned int *model_meshes_ptr = model_node->mMeshes;
-
-            for (int k = 0; k < pmodel->nummesh; ++k, ++pmesh, ++mesh_index, ++model_meshes_ptr) {
-                *model_meshes_ptr = mesh_index;
-
-                // Read triverts.
-                short *ptricmds = (short *)((uint8_t *)header_ + pmesh->triindex);
-                float texcoords_s_scale = 1.0f / (float)ptexture[pskinref[pmesh->skinref]].width;
-                float texcoords_t_scale = 1.0f / (float)ptexture[pskinref[pmesh->skinref]].height;
-
-                // Reset the data for the upcoming mesh.
-                triverts.clear();
-                triverts.resize(pmodel->numverts);
-                mesh_triverts_indices.clear();
-                mesh_faces.clear();
-                triverts_similars.clear();
-                bone_triverts.clear();
-
-                int l;
-                while ((l = *(ptricmds++))) {
-                    bool is_triangle_fan = false;
-
-                    if (l < 0) {
-                        l = -l;
-                        is_triangle_fan = true;
-                    }
-
-                    // Clear the list of tris for the upcoming tris.
-                    tricmds.clear();
-
-                    for (; l > 0; l--, ptricmds += 4) {
-                        const Trivert *input_trivert = reinterpret_cast<const Trivert *>(ptricmds);
-                        const int bone = pvertbone[input_trivert->vertindex];
-
-                        HL1MeshTrivert *private_trivert = &triverts[input_trivert->vertindex];
-                        if (private_trivert->localindex == -1) {
-                            // First time referenced.
-                            *private_trivert = *input_trivert;
-                            private_trivert->localindex = static_cast<short>(mesh_triverts_indices.size());
-                            mesh_triverts_indices.push_back(input_trivert->vertindex);
-                            tricmds.push_back(private_trivert->localindex);
-                            AddTrivertToBone(bone, private_trivert->localindex);
-                        } else if (*private_trivert == *input_trivert) {
-                            // Exists and is the same.
-                            tricmds.push_back(private_trivert->localindex);
-                        } else {
-                            // No similar trivert associated to the trivert currently processed.
-                            if (triverts_similars.count(input_trivert->vertindex) == 0)
-                                AddSimilarTrivert(*input_trivert, bone);
-                            else {
-                                // Search in the list of similar triverts to see if the
-                                // trivert in process is already registered.
-                                short similar_index = -1;
-                                for (auto it = triverts_similars[input_trivert->vertindex].cbegin();
-                                        similar_index == -1 && it != triverts_similars[input_trivert->vertindex].cend();
-                                        ++it) {
-                                    if (triverts[*it] == *input_trivert)
-                                        similar_index = *it;
-                                }
-
-                                // If a similar trivert has been found, reuse it.
-                                // Otherwise, add it.
-                                if (similar_index == -1)
-                                    AddSimilarTrivert(*input_trivert, bone);
-                                else
-                                    tricmds.push_back(triverts[similar_index].localindex);
-                            }
-                        }
-                    }
-
-                    // Build mesh faces.
-                    const int num_faces = static_cast<int>(tricmds.size() - 2);
-                    mesh_faces.reserve(num_faces);
-
-                    if (is_triangle_fan) {
-                        for (int faceIdx = 0; faceIdx < num_faces; ++faceIdx) {
-                            mesh_faces.push_back(HL1MeshFace{
-                                    tricmds[0],
-                                    tricmds[faceIdx + 1],
-                                    tricmds[faceIdx + 2] });
-                        }
-                    } else {
-                        for (int faceIdx = 0; faceIdx < num_faces; ++faceIdx) {
-                            if (faceIdx & 1) {
-                                // Preserve winding order.
-                                mesh_faces.push_back(HL1MeshFace{
-                                        tricmds[faceIdx + 1],
-                                        tricmds[faceIdx],
-                                        tricmds[faceIdx + 2] });
-                            } else {
-                                mesh_faces.push_back(HL1MeshFace{
-                                        tricmds[faceIdx],
-                                        tricmds[faceIdx + 1],
-                                        tricmds[faceIdx + 2] });
-                            }
-                        }
-                    }
-
-                    total_triangles += num_faces;
-                }
-
-                // Create the scene mesh.
-                aiMesh *scene_mesh = scene_->mMeshes[mesh_index] = new aiMesh();
-                scene_mesh->mPrimitiveTypes = aiPrimitiveType::aiPrimitiveType_TRIANGLE;
-                scene_mesh->mMaterialIndex = pskinref[pmesh->skinref];
-
-                scene_mesh->mNumVertices = static_cast<unsigned int>(mesh_triverts_indices.size());
-
-                if (scene_mesh->mNumVertices) {
-                    scene_mesh->mVertices = new aiVector3D[scene_mesh->mNumVertices];
-                    scene_mesh->mNormals = new aiVector3D[scene_mesh->mNumVertices];
-
-                    scene_mesh->mNumUVComponents[0] = 2;
-                    scene_mesh->mTextureCoords[0] = new aiVector3D[scene_mesh->mNumVertices];
-
-                    // Add vertices.
-                    for (unsigned int v = 0; v < scene_mesh->mNumVertices; ++v) {
-                        const HL1MeshTrivert *pTrivert = &triverts[mesh_triverts_indices[v]];
-                        scene_mesh->mVertices[v] = bind_pose_vertices[pTrivert->vertindex];
-                        scene_mesh->mNormals[v] = bind_pose_normals[pTrivert->normindex];
-                        scene_mesh->mTextureCoords[0][v] = aiVector3D(
-                                pTrivert->s * texcoords_s_scale,
-                                pTrivert->t * -texcoords_t_scale, 0);
-                    }
-
-                    // Add face and indices.
-                    scene_mesh->mNumFaces = static_cast<unsigned int>(mesh_faces.size());
-                    scene_mesh->mFaces = new aiFace[scene_mesh->mNumFaces];
-
-                    for (unsigned int f = 0; f < scene_mesh->mNumFaces; ++f) {
-                        aiFace *face = &scene_mesh->mFaces[f];
-                        face->mNumIndices = 3;
-                        face->mIndices = new unsigned int[3];
-                        face->mIndices[0] = mesh_faces[f].v2;
-                        face->mIndices[1] = mesh_faces[f].v1;
-                        face->mIndices[2] = mesh_faces[f].v0;
-                    }
-
-                    // Add mesh bones.
-                    scene_mesh->mNumBones = static_cast<unsigned int>(bone_triverts.size());
-                    scene_mesh->mBones = new aiBone *[scene_mesh->mNumBones];
-
-                    aiBone **scene_bone_ptr = scene_mesh->mBones;
-
-                    for (auto bone_it = bone_triverts.cbegin();
-                            bone_it != bone_triverts.cend();
-                            ++bone_it, ++scene_bone_ptr) {
-                        const int bone_index = bone_it->first;
-
-                        aiBone *scene_bone = (*scene_bone_ptr) = new aiBone();
-                        scene_bone->mName = temp_bones_[bone_index].node->mName;
-
-                        scene_bone->mOffsetMatrix = temp_bones_[bone_index].offset_matrix;
-
-                        auto vertex_ids = bone_triverts.at(bone_index);
-
-                        // Add vertex weight per bone.
-                        scene_bone->mNumWeights = static_cast<unsigned int>(vertex_ids.size());
-                        aiVertexWeight *vertex_weight_ptr = scene_bone->mWeights = new aiVertexWeight[scene_bone->mNumWeights];
-
-                        for (auto vertex_it = vertex_ids.begin();
-                                vertex_it != vertex_ids.end();
-                                ++vertex_it, ++vertex_weight_ptr) {
-                            vertex_weight_ptr->mVertexId = *vertex_it;
-                            vertex_weight_ptr->mWeight = 1.0f;
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    if (total_triangles > AI_MDL_HL1_MAX_TRIANGLES) {
-        log_warning_limit_exceeded<AI_MDL_HL1_MAX_TRIANGLES>(total_triangles, "triangles");
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_animations() {
-    if (!header_->numseq) {
-        return;
-    }
-
-    const SequenceDesc_HL1 *pseqdesc = (const SequenceDesc_HL1 *)((uint8_t *)header_ + header_->seqindex);
-    const SequenceGroup_HL1 *pseqgroup = nullptr;
-    const AnimValueOffset_HL1 *panim = nullptr;
-    const AnimValue_HL1 *panimvalue = nullptr;
-
-    unique_sequence_names_.resize(header_->numseq);
-    for (int i = 0; i < header_->numseq; ++i)
-        unique_sequence_names_[i] = pseqdesc[i].label;
-
-    // Ensure sequences have unique names.
-    unique_name_generator_.set_template_name("Sequence");
-    unique_name_generator_.make_unique(unique_sequence_names_);
-
-    scene_->mNumAnimations = 0;
-
-    int highest_num_blend_animations = SequenceBlendMode_HL1::NoBlend;
-
-    // Count the total number of animations.
-    for (int i = 0; i < header_->numseq; ++i, ++pseqdesc) {
-        scene_->mNumAnimations += pseqdesc->numblends;
-        highest_num_blend_animations = std::max(pseqdesc->numblends, highest_num_blend_animations);
-    }
-
-    // Get the number of available blend controllers for global info.
-    get_num_blend_controllers(highest_num_blend_animations, num_blend_controllers_);
-
-    pseqdesc = (const SequenceDesc_HL1 *)((uint8_t *)header_ + header_->seqindex);
-
-    aiAnimation **scene_animations_ptr = scene_->mAnimations = new aiAnimation *[scene_->mNumAnimations];
-
-    for (int sequence = 0; sequence < header_->numseq; ++sequence, ++pseqdesc) {
-        pseqgroup = (const SequenceGroup_HL1 *)((uint8_t *)header_ + header_->seqgroupindex) + pseqdesc->seqgroup;
-
-        if (pseqdesc->seqgroup == 0) {
-            panim = (const AnimValueOffset_HL1 *)((uint8_t *)header_ + pseqgroup->unused2 + pseqdesc->animindex);
-        } else {
-            panim = (const AnimValueOffset_HL1 *)((uint8_t *)anim_headers_[pseqdesc->seqgroup] + pseqdesc->animindex);
-        }
-
-        for (int blend = 0; blend < pseqdesc->numblends; ++blend, ++scene_animations_ptr) {
-
-            const Bone_HL1 *pbone = (const Bone_HL1 *)((uint8_t *)header_ + header_->boneindex);
-
-            aiAnimation *scene_animation = (*scene_animations_ptr) = new aiAnimation();
-
-            scene_animation->mName = unique_sequence_names_[sequence];
-            scene_animation->mTicksPerSecond = pseqdesc->fps;
-            scene_animation->mDuration = static_cast<double>(pseqdesc->fps) * pseqdesc->numframes;
-            scene_animation->mNumChannels = static_cast<unsigned int>(header_->numbones);
-            scene_animation->mChannels = new aiNodeAnim *[scene_animation->mNumChannels];
-
-            for (int bone = 0; bone < header_->numbones; bone++, ++pbone, ++panim) {
-                aiNodeAnim *node_anim = scene_animation->mChannels[bone] = new aiNodeAnim();
-                node_anim->mNodeName = temp_bones_[bone].node->mName;
-
-                node_anim->mNumPositionKeys = pseqdesc->numframes;
-                node_anim->mNumRotationKeys = node_anim->mNumPositionKeys;
-                node_anim->mNumScalingKeys = 0;
-
-                node_anim->mPositionKeys = new aiVectorKey[node_anim->mNumPositionKeys];
-                node_anim->mRotationKeys = new aiQuatKey[node_anim->mNumRotationKeys];
-
-                for (int frame = 0; frame < pseqdesc->numframes; ++frame) {
-                    aiVectorKey *position_key = &node_anim->mPositionKeys[frame];
-                    aiQuatKey *rotation_key = &node_anim->mRotationKeys[frame];
-
-                    aiVector3D angle1;
-                    for (int j = 0; j < 3; ++j) {
-                        if (panim->offset[j + 3] != 0) {
-                            // Read compressed rotation delta.
-                            panimvalue = (const AnimValue_HL1 *)((uint8_t *)panim + panim->offset[j + 3]);
-                            extract_anim_value(panimvalue, frame, pbone->scale[j + 3], angle1[j]);
-                        }
-
-                        // Add the default rotation value.
-                        angle1[j] += pbone->value[j + 3];
-
-                        if (panim->offset[j] != 0) {
-                            // Read compressed position delta.
-                            panimvalue = (const AnimValue_HL1 *)((uint8_t *)panim + panim->offset[j]);
-                            extract_anim_value(panimvalue, frame, pbone->scale[j], position_key->mValue[j]);
-                        }
-
-                        // Add the default position value.
-                        position_key->mValue[j] += pbone->value[j];
-                    }
-
-                    position_key->mTime = rotation_key->mTime = static_cast<double>(frame);
-                    /* The Half-Life engine uses X as forward, Y as left, Z as up. Therefore,
-                       pitch,yaw,roll is represented as (YZX). */
-                    rotation_key->mValue = aiQuaternion(angle1.y, angle1.z, angle1.x);
-                    rotation_key->mValue.Normalize();
-                }
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_sequence_groups_info() {
-    if (!header_->numseqgroups) {
-        return;
-    }
-
-    aiNode *sequence_groups_node = new aiNode(AI_MDL_HL1_NODE_SEQUENCE_GROUPS);
-    rootnode_children_.push_back(sequence_groups_node);
-
-    sequence_groups_node->mNumChildren = static_cast<unsigned int>(header_->numseqgroups);
-    sequence_groups_node->mChildren = new aiNode *[sequence_groups_node->mNumChildren];
-
-    const SequenceGroup_HL1 *pseqgroup = (const SequenceGroup_HL1 *)((uint8_t *)header_ + header_->seqgroupindex);
-
-    unique_sequence_groups_names_.resize(header_->numseqgroups);
-    for (int i = 0; i < header_->numseqgroups; ++i) {
-        unique_sequence_groups_names_[i] = pseqgroup[i].label;
-    }
-
-    // Ensure sequence groups have unique names.
-    unique_name_generator_.set_template_name("SequenceGroup");
-    unique_name_generator_.make_unique(unique_sequence_groups_names_);
-
-    for (int i = 0; i < header_->numseqgroups; ++i, ++pseqgroup) {
-        aiNode *sequence_group_node = sequence_groups_node->mChildren[i] = new aiNode(unique_sequence_groups_names_[i]);
-        sequence_group_node->mParent = sequence_groups_node;
-
-        aiMetadata *md = sequence_group_node->mMetaData = aiMetadata::Alloc(1);
-        if (i == 0) {
-            /* StudioMDL does not write the file name for the default sequence group,
-               so we will write it. */
-            md->Set(0, "File", aiString(file_path_));
-        } else {
-            md->Set(0, "File", aiString(pseqgroup->name));
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_sequence_infos() {
-    if (!header_->numseq) {
-        return;
-    }
-
-    const SequenceDesc_HL1 *pseqdesc = (const SequenceDesc_HL1 *)((uint8_t *)header_ + header_->seqindex);
-
-    aiNode *sequence_infos_node = new aiNode(AI_MDL_HL1_NODE_SEQUENCE_INFOS);
-    rootnode_children_.push_back(sequence_infos_node);
-
-    sequence_infos_node->mNumChildren = static_cast<unsigned int>(header_->numseq);
-    sequence_infos_node->mChildren = new aiNode *[sequence_infos_node->mNumChildren];
-
-    std::vector<aiNode *> sequence_info_node_children;
-
-    int animation_index = 0;
-    for (int i = 0; i < header_->numseq; ++i, ++pseqdesc) {
-        // Clear the list of children for the upcoming sequence info node.
-        sequence_info_node_children.clear();
-
-        aiNode *sequence_info_node = sequence_infos_node->mChildren[i] = new aiNode(unique_sequence_names_[i]);
-        sequence_info_node->mParent = sequence_infos_node;
-
-        // Setup sequence info node Metadata.
-        aiMetadata *md = sequence_info_node->mMetaData = aiMetadata::Alloc(16);
-        md->Set(0, "AnimationIndex", animation_index);
-        animation_index += pseqdesc->numblends;
-
-        // Reference the sequence group by name. This allows us to search a particular
-        // sequence group by name using aiNode(s).
-        md->Set(1, "SequenceGroup", aiString(unique_sequence_groups_names_[pseqdesc->seqgroup]));
-        md->Set(2, "FramesPerSecond", pseqdesc->fps);
-        md->Set(3, "NumFrames", pseqdesc->numframes);
-        md->Set(4, "NumBlends", pseqdesc->numblends);
-        md->Set(5, "Activity", pseqdesc->activity);
-        md->Set(6, "ActivityWeight", pseqdesc->actweight);
-        md->Set(7, "MotionFlags", pseqdesc->motiontype);
-        md->Set(8, "MotionBone", temp_bones_[pseqdesc->motionbone].node->mName);
-        md->Set(9, "LinearMovement", aiVector3D(pseqdesc->linearmovement[0], pseqdesc->linearmovement[1], pseqdesc->linearmovement[2]));
-        md->Set(10, "BBMin", aiVector3D(pseqdesc->bbmin[0], pseqdesc->bbmin[1], pseqdesc->bbmin[2]));
-        md->Set(11, "BBMax", aiVector3D(pseqdesc->bbmax[0], pseqdesc->bbmax[1], pseqdesc->bbmax[2]));
-        md->Set(12, "EntryNode", pseqdesc->entrynode);
-        md->Set(13, "ExitNode", pseqdesc->exitnode);
-        md->Set(14, "NodeFlags", pseqdesc->nodeflags);
-        md->Set(15, "Flags", pseqdesc->flags);
-
-        if (import_settings_.read_blend_controllers) {
-            int num_blend_controllers;
-            if (get_num_blend_controllers(pseqdesc->numblends, num_blend_controllers) && num_blend_controllers) {
-                // Read blend controllers info.
-                aiNode *blend_controllers_node = new aiNode(AI_MDL_HL1_NODE_BLEND_CONTROLLERS);
-                sequence_info_node_children.push_back(blend_controllers_node);
-                blend_controllers_node->mParent = sequence_info_node;
-                blend_controllers_node->mNumChildren = static_cast<unsigned int>(num_blend_controllers);
-                blend_controllers_node->mChildren = new aiNode *[blend_controllers_node->mNumChildren];
-
-                for (unsigned int j = 0; j < blend_controllers_node->mNumChildren; ++j) {
-                    aiNode *blend_controller_node = blend_controllers_node->mChildren[j] = new aiNode();
-                    blend_controller_node->mParent = blend_controllers_node;
-
-                    aiMetadata *metaData = blend_controller_node->mMetaData = aiMetadata::Alloc(3);
-                    metaData->Set(0, "Start", pseqdesc->blendstart[j]);
-                    metaData->Set(1, "End", pseqdesc->blendend[j]);
-                    metaData->Set(2, "MotionFlags", pseqdesc->blendtype[j]);
-                }
-            }
-        }
-
-        if (import_settings_.read_animation_events && pseqdesc->numevents) {
-            // Read animation events.
-
-            if (pseqdesc->numevents > AI_MDL_HL1_MAX_EVENTS) {
-                log_warning_limit_exceeded<AI_MDL_HL1_MAX_EVENTS>(
-                        "Sequence " + std::string(pseqdesc->label),
-                        pseqdesc->numevents, "animation events");
-            }
-
-            const AnimEvent_HL1 *pevent = (const AnimEvent_HL1 *)((uint8_t *)header_ + pseqdesc->eventindex);
-
-            aiNode *pEventsNode = new aiNode(AI_MDL_HL1_NODE_ANIMATION_EVENTS);
-            sequence_info_node_children.push_back(pEventsNode);
-            pEventsNode->mParent = sequence_info_node;
-            pEventsNode->mNumChildren = static_cast<unsigned int>(pseqdesc->numevents);
-            pEventsNode->mChildren = new aiNode *[pEventsNode->mNumChildren];
-
-            for (unsigned int j = 0; j < pEventsNode->mNumChildren; ++j, ++pevent) {
-                aiNode *pEvent = pEventsNode->mChildren[j] = new aiNode();
-                pEvent->mParent = pEventsNode;
-
-                aiMetadata *metaData = pEvent->mMetaData = aiMetadata::Alloc(3);
-                metaData->Set(0, "Frame", pevent->frame);
-                metaData->Set(1, "ScriptEvent", pevent->event);
-                metaData->Set(2, "Options", aiString(pevent->options));
-            }
-        }
-
-        if (sequence_info_node_children.size()) {
-            sequence_info_node->addChildren(
-                    static_cast<unsigned int>(sequence_info_node_children.size()),
-                    sequence_info_node_children.data());
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_sequence_transitions() {
-    if (!header_->numtransitions) {
-        return;
-    }
-
-    // Read sequence transition graph.
-    aiNode *transition_graph_node = new aiNode(AI_MDL_HL1_NODE_SEQUENCE_TRANSITION_GRAPH);
-    rootnode_children_.push_back(transition_graph_node);
-
-    uint8_t *ptransitions = ((uint8_t *)header_ + header_->transitionindex);
-    aiMetadata *md = transition_graph_node->mMetaData = aiMetadata::Alloc(header_->numtransitions * header_->numtransitions);
-    for (unsigned int i = 0; i < md->mNumProperties; ++i)
-        md->Set(i, std::to_string(i), static_cast<int>(ptransitions[i]));
-}
-
-void HL1MDLLoader::read_attachments() {
-    if (!header_->numattachments) {
-        return;
-    }
-
-    const Attachment_HL1 *pattach = (const Attachment_HL1 *)((uint8_t *)header_ + header_->attachmentindex);
-
-    aiNode *attachments_node = new aiNode(AI_MDL_HL1_NODE_ATTACHMENTS);
-    rootnode_children_.push_back(attachments_node);
-    attachments_node->mNumChildren = static_cast<unsigned int>(header_->numattachments);
-    attachments_node->mChildren = new aiNode *[attachments_node->mNumChildren];
-
-    for (int i = 0; i < header_->numattachments; ++i, ++pattach) {
-        aiNode *attachment_node = attachments_node->mChildren[i] = new aiNode();
-        attachment_node->mParent = attachments_node;
-        attachment_node->mMetaData = aiMetadata::Alloc(2);
-        attachment_node->mMetaData->Set(0, "Position", aiVector3D(pattach->org[0], pattach->org[1], pattach->org[2]));
-        // Reference the bone by name. This allows us to search a particular
-        // bone by name using aiNode(s).
-        attachment_node->mMetaData->Set(1, "Bone", temp_bones_[pattach->bone].node->mName);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_hitboxes() {
-    if (!header_->numhitboxes) {
-        return;
-    }
-
-    const Hitbox_HL1 *phitbox = (const Hitbox_HL1 *)((uint8_t *)header_ + header_->hitboxindex);
-
-    aiNode *hitboxes_node = new aiNode(AI_MDL_HL1_NODE_HITBOXES);
-    rootnode_children_.push_back(hitboxes_node);
-    hitboxes_node->mNumChildren = static_cast<unsigned int>(header_->numhitboxes);
-    hitboxes_node->mChildren = new aiNode *[hitboxes_node->mNumChildren];
-
-    for (int i = 0; i < header_->numhitboxes; ++i, ++phitbox) {
-        aiNode *hitbox_node = hitboxes_node->mChildren[i] = new aiNode();
-        hitbox_node->mParent = hitboxes_node;
-
-        aiMetadata *md = hitbox_node->mMetaData = aiMetadata::Alloc(4);
-        // Reference the bone by name. This allows us to search a particular
-        // bone by name using aiNode(s).
-        md->Set(0, "Bone", temp_bones_[phitbox->bone].node->mName);
-        md->Set(1, "HitGroup", phitbox->group);
-        md->Set(2, "BBMin", aiVector3D(phitbox->bbmin[0], phitbox->bbmin[1], phitbox->bbmin[2]));
-        md->Set(3, "BBMax", aiVector3D(phitbox->bbmax[0], phitbox->bbmax[1], phitbox->bbmax[2]));
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_bone_controllers() {
-    if (!header_->numbonecontrollers) {
-        return;
-    }
-
-    const BoneController_HL1 *pbonecontroller = (const BoneController_HL1 *)((uint8_t *)header_ + header_->bonecontrollerindex);
-
-    aiNode *bones_controller_node = new aiNode(AI_MDL_HL1_NODE_BONE_CONTROLLERS);
-    rootnode_children_.push_back(bones_controller_node);
-    bones_controller_node->mNumChildren = static_cast<unsigned int>(header_->numbonecontrollers);
-    bones_controller_node->mChildren = new aiNode *[bones_controller_node->mNumChildren];
-
-    for (int i = 0; i < header_->numbonecontrollers; ++i, ++pbonecontroller) {
-        aiNode *bone_controller_node = bones_controller_node->mChildren[i] = new aiNode();
-        bone_controller_node->mParent = bones_controller_node;
-
-        aiMetadata *md = bone_controller_node->mMetaData = aiMetadata::Alloc(5);
-        // Reference the bone by name. This allows us to search a particular
-        // bone by name using aiNode(s).
-        md->Set(0, "Bone", temp_bones_[pbonecontroller->bone].node->mName);
-        md->Set(1, "MotionFlags", pbonecontroller->type);
-        md->Set(2, "Start", pbonecontroller->start);
-        md->Set(3, "End", pbonecontroller->end);
-        md->Set(4, "Channel", pbonecontroller->index);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void HL1MDLLoader::read_global_info() {
-    aiNode *global_info_node = new aiNode(AI_MDL_HL1_NODE_GLOBAL_INFO);
-    rootnode_children_.push_back(global_info_node);
-
-    aiMetadata *md = global_info_node->mMetaData = aiMetadata::Alloc(import_settings_.read_misc_global_info ? 16 : 11);
-    md->Set(0, "Version", AI_MDL_HL1_VERSION);
-    md->Set(1, "NumBodyparts", header_->numbodyparts);
-    md->Set(2, "NumModels", total_models_);
-    md->Set(3, "NumBones", header_->numbones);
-    md->Set(4, "NumAttachments", import_settings_.read_attachments ? header_->numattachments : 0);
-    md->Set(5, "NumSkinFamilies", texture_header_->numskinfamilies);
-    md->Set(6, "NumHitboxes", import_settings_.read_hitboxes ? header_->numhitboxes : 0);
-    md->Set(7, "NumBoneControllers", import_settings_.read_bone_controllers ? header_->numbonecontrollers : 0);
-    md->Set(8, "NumSequences", import_settings_.read_animations ? header_->numseq : 0);
-    md->Set(9, "NumBlendControllers", import_settings_.read_blend_controllers ? num_blend_controllers_ : 0);
-    md->Set(10, "NumTransitionNodes", import_settings_.read_sequence_transitions ? header_->numtransitions : 0);
-
-    if (import_settings_.read_misc_global_info) {
-        md->Set(11, "EyePosition", aiVector3D(header_->eyeposition[0], header_->eyeposition[1], header_->eyeposition[2]));
-        md->Set(12, "HullMin", aiVector3D(header_->min[0], header_->min[1], header_->min[2]));
-        md->Set(13, "HullMax", aiVector3D(header_->max[0], header_->max[1], header_->max[2]));
-        md->Set(14, "CollisionMin", aiVector3D(header_->bbmin[0], header_->bbmin[1], header_->bbmin[2]));
-        md->Set(15, "CollisionMax", aiVector3D(header_->bbmax[0], header_->bbmax[1], header_->bbmax[2]));
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-/** @brief This method reads a compressed anim value.
-*
-*   @note The structure of this method is taken from HL2 source code.
-*   Although this is from HL2, it's implementation is almost identical
-*   to code found in HL1 SDK. See HL1 and HL2 SDKs for more info.
-*
-*   source:
-*       HL1 source code.
-*           file: studio_render.cpp
-*           function(s): CalcBoneQuaternion and CalcBonePosition
-*
-*       HL2 source code.
-*           file: bone_setup.cpp
-*           function(s): ExtractAnimValue
-*/
-void HL1MDLLoader::extract_anim_value(
-        const AnimValue_HL1 *panimvalue,
-        int frame, float bone_scale, ai_real &value) {
-    int k = frame;
-
-    // find span of values that includes the frame we want
-    while (panimvalue->num.total <= k) {
-        k -= panimvalue->num.total;
-        panimvalue += panimvalue->num.valid + 1;
-    }
-
-    // Bah, missing blend!
-    if (panimvalue->num.valid > k) {
-        value = panimvalue[k + 1].value * bone_scale;
-    } else {
-        value = panimvalue[panimvalue->num.valid].value * bone_scale;
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// Get the number of blend controllers.
-bool HL1MDLLoader::get_num_blend_controllers(const int num_blend_animations, int &num_blend_controllers) {
-
-    switch (num_blend_animations) {
-        case SequenceBlendMode_HL1::NoBlend:
-            num_blend_controllers = 0;
-            return true;
-        case SequenceBlendMode_HL1::TwoWayBlending:
-            num_blend_controllers = 1;
-            return true;
-        case SequenceBlendMode_HL1::FourWayBlending:
-            num_blend_controllers = 2;
-            return true;
-        default:
-            num_blend_controllers = 0;
-            ASSIMP_LOG_WARN(MDL_HALFLIFE_LOG_HEADER "Unsupported number of blend animations (", num_blend_animations, ")");
-            return false;
-    }
-}
-
-} // namespace HalfLife
-} // namespace MDL
-} // namespace Assimp