move 3rd-party librarys into libs/ and add built-in honeysuckle

1 files changed, 299 insertions, 0 deletions

diff --git a/libs/assimp/code/AssetLib/Blender/BlenderModifier.cpp b/libs/assimp/code/AssetLib/Blender/BlenderModifier.cpp
new file mode 100644
index 0000000..d2b393d
--- /dev/null
+++ b/libs/assimp/code/AssetLib/Blender/BlenderModifier.cpp
@@ -0,0 +1,299 @@
+/*
+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  BlenderModifier.cpp
+ *  @brief Implementation of some blender modifiers (i.e subdivision, mirror).
+ */
+
+#ifndef ASSIMP_BUILD_NO_BLEND_IMPORTER
+
+#include "BlenderModifier.h"
+#include <assimp/SceneCombiner.h>
+#include <assimp/Subdivision.h>
+#include <assimp/scene.h>
+#include <memory>
+
+#include <functional>
+
+using namespace Assimp;
+using namespace Assimp::Blender;
+
+template <typename T>
+BlenderModifier *god() {
+    return new T();
+}
+
+// add all available modifiers here
+typedef BlenderModifier *(*fpCreateModifier)();
+static const fpCreateModifier creators[] = {
+    &god<BlenderModifier_Mirror>,
+    &god<BlenderModifier_Subdivision>,
+
+    nullptr // sentinel
+};
+
+// ------------------------------------------------------------------------------------------------
+struct SharedModifierData : ElemBase {
+    ModifierData modifier;
+};
+
+// ------------------------------------------------------------------------------------------------
+void BlenderModifierShowcase::ApplyModifiers(aiNode &out, ConversionData &conv_data, const Scene &in, const Object &orig_object) {
+    size_t cnt = 0u, ful = 0u;
+
+    // NOTE: this cast is potentially unsafe by design, so we need to perform type checks before
+    // we're allowed to dereference the pointers without risking to crash. We might still be
+    // invoking UB btw - we're assuming that the ModifierData member of the respective modifier
+    // structures is at offset sizeof(vftable) with no padding.
+    const SharedModifierData *cur = static_cast<const SharedModifierData *>(orig_object.modifiers.first.get());
+    for (; cur; cur = static_cast<const SharedModifierData *>(cur->modifier.next.get()), ++ful) {
+        ai_assert(cur->dna_type);
+
+        const Structure *s = conv_data.db.dna.Get(cur->dna_type);
+        if (!s) {
+            ASSIMP_LOG_WARN("BlendModifier: could not resolve DNA name: ", cur->dna_type);
+            continue;
+        }
+
+        // this is a common trait of all XXXMirrorData structures in BlenderDNA
+        const Field *f = s->Get("modifier");
+        if (!f || f->offset != 0) {
+            ASSIMP_LOG_WARN("BlendModifier: expected a `modifier` member at offset 0");
+            continue;
+        }
+
+        s = conv_data.db.dna.Get(f->type);
+        if (!s || s->name != "ModifierData") {
+            ASSIMP_LOG_WARN("BlendModifier: expected a ModifierData structure as first member");
+            continue;
+        }
+
+        // now, we can be sure that we should be fine to dereference *cur* as
+        // ModifierData (with the above note).
+        const ModifierData &dat = cur->modifier;
+
+        const fpCreateModifier *curgod = creators;
+        std::vector<BlenderModifier *>::iterator curmod = cached_modifiers->begin(), endmod = cached_modifiers->end();
+
+        for (; *curgod; ++curgod, ++curmod) { // allocate modifiers on the fly
+            if (curmod == endmod) {
+                cached_modifiers->push_back((*curgod)());
+
+                endmod = cached_modifiers->end();
+                curmod = endmod - 1;
+            }
+
+            BlenderModifier *const modifier = *curmod;
+            if (modifier->IsActive(dat)) {
+                modifier->DoIt(out, conv_data, *static_cast<const ElemBase *>(cur), in, orig_object);
+                cnt++;
+
+                curgod = nullptr;
+                break;
+            }
+        }
+        if (curgod) {
+            ASSIMP_LOG_WARN("Couldn't find a handler for modifier: ", dat.name);
+        }
+    }
+
+    // Even though we managed to resolve some or all of the modifiers on this
+    // object, we still can't say whether our modifier implementations were
+    // able to fully do their job.
+    if (ful) {
+        ASSIMP_LOG_DEBUG("BlendModifier: found handlers for ", cnt, " of ", ful, " modifiers on `", orig_object.id.name,
+                "`, check log messages above for errors");
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+bool BlenderModifier_Mirror ::IsActive(const ModifierData &modin) {
+    return modin.type == ModifierData::eModifierType_Mirror;
+}
+
+// ------------------------------------------------------------------------------------------------
+void BlenderModifier_Mirror ::DoIt(aiNode &out, ConversionData &conv_data, const ElemBase &orig_modifier,
+        const Scene & /*in*/,
+        const Object &orig_object) {
+    // hijacking the ABI, see the big note in BlenderModifierShowcase::ApplyModifiers()
+    const MirrorModifierData &mir = static_cast<const MirrorModifierData &>(orig_modifier);
+    ai_assert(mir.modifier.type == ModifierData::eModifierType_Mirror);
+
+    conv_data.meshes->reserve(conv_data.meshes->size() + out.mNumMeshes);
+
+    // XXX not entirely correct, mirroring on two axes results in 4 distinct objects in blender ...
+
+    // take all input meshes and clone them
+    for (unsigned int i = 0; i < out.mNumMeshes; ++i) {
+        aiMesh *mesh;
+        SceneCombiner::Copy(&mesh, conv_data.meshes[out.mMeshes[i]]);
+
+        const float xs = mir.flag & MirrorModifierData::Flags_AXIS_X ? -1.f : 1.f;
+        const float ys = mir.flag & MirrorModifierData::Flags_AXIS_Y ? -1.f : 1.f;
+        const float zs = mir.flag & MirrorModifierData::Flags_AXIS_Z ? -1.f : 1.f;
+
+        if (mir.mirror_ob) {
+            const aiVector3D center(mir.mirror_ob->obmat[3][0], mir.mirror_ob->obmat[3][1], mir.mirror_ob->obmat[3][2]);
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mVertices[j];
+
+                v.x = center.x + xs * (center.x - v.x);
+                v.y = center.y + ys * (center.y - v.y);
+                v.z = center.z + zs * (center.z - v.z);
+            }
+        } else {
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mVertices[j];
+                v.x *= xs;
+                v.y *= ys;
+                v.z *= zs;
+            }
+        }
+
+        if (mesh->mNormals) {
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mNormals[j];
+                v.x *= xs;
+                v.y *= ys;
+                v.z *= zs;
+            }
+        }
+
+        if (mesh->mTangents) {
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mTangents[j];
+                v.x *= xs;
+                v.y *= ys;
+                v.z *= zs;
+            }
+        }
+
+        if (mesh->mBitangents) {
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mBitangents[j];
+                v.x *= xs;
+                v.y *= ys;
+                v.z *= zs;
+            }
+        }
+
+        const float us = mir.flag & MirrorModifierData::Flags_MIRROR_U ? -1.f : 1.f;
+        const float vs = mir.flag & MirrorModifierData::Flags_MIRROR_V ? -1.f : 1.f;
+
+        for (unsigned int n = 0; mesh->HasTextureCoords(n); ++n) {
+            for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
+                aiVector3D &v = mesh->mTextureCoords[n][j];
+                v.x *= us;
+                v.y *= vs;
+            }
+        }
+
+        // Only reverse the winding order if an odd number of axes were mirrored.
+        if (xs * ys * zs < 0) {
+            for (unsigned int j = 0; j < mesh->mNumFaces; ++j) {
+                aiFace &face = mesh->mFaces[j];
+                for (unsigned int fi = 0; fi < face.mNumIndices / 2; ++fi)
+                    std::swap(face.mIndices[fi], face.mIndices[face.mNumIndices - 1 - fi]);
+            }
+        }
+
+        conv_data.meshes->push_back(mesh);
+    }
+    unsigned int *nind = new unsigned int[out.mNumMeshes * 2];
+
+    std::copy(out.mMeshes, out.mMeshes + out.mNumMeshes, nind);
+    std::transform(out.mMeshes, out.mMeshes + out.mNumMeshes, nind + out.mNumMeshes,
+            [&out](unsigned int n) { return out.mNumMeshes + n; });
+
+    delete[] out.mMeshes;
+    out.mMeshes = nind;
+    out.mNumMeshes *= 2;
+
+    ASSIMP_LOG_INFO("BlendModifier: Applied the `Mirror` modifier to `",
+            orig_object.id.name, "`");
+}
+
+// ------------------------------------------------------------------------------------------------
+bool BlenderModifier_Subdivision ::IsActive(const ModifierData &modin) {
+    return modin.type == ModifierData::eModifierType_Subsurf;
+}
+
+// ------------------------------------------------------------------------------------------------
+void BlenderModifier_Subdivision ::DoIt(aiNode &out, ConversionData &conv_data, const ElemBase &orig_modifier,
+        const Scene & /*in*/,
+        const Object &orig_object) {
+    // hijacking the ABI, see the big note in BlenderModifierShowcase::ApplyModifiers()
+    const SubsurfModifierData &mir = static_cast<const SubsurfModifierData &>(orig_modifier);
+    ai_assert(mir.modifier.type == ModifierData::eModifierType_Subsurf);
+
+    Subdivider::Algorithm algo;
+    switch (mir.subdivType) {
+    case SubsurfModifierData::TYPE_CatmullClarke:
+        algo = Subdivider::CATMULL_CLARKE;
+        break;
+
+    case SubsurfModifierData::TYPE_Simple:
+        ASSIMP_LOG_WARN("BlendModifier: The `SIMPLE` subdivision algorithm is not currently implemented, using Catmull-Clarke");
+        algo = Subdivider::CATMULL_CLARKE;
+        break;
+
+    default:
+        ASSIMP_LOG_WARN("BlendModifier: Unrecognized subdivision algorithm: ", mir.subdivType);
+        return;
+    };
+
+    std::unique_ptr<Subdivider> subd(Subdivider::Create(algo));
+    ai_assert(subd);
+    if (conv_data.meshes->empty()) {
+        return;
+    }
+    aiMesh **const meshes = &conv_data.meshes[conv_data.meshes->size() - out.mNumMeshes];
+    std::unique_ptr<aiMesh *[]> tempmeshes(new aiMesh *[out.mNumMeshes]());
+
+    subd->Subdivide(meshes, out.mNumMeshes, tempmeshes.get(), std::max(mir.renderLevels, mir.levels), true);
+    std::copy(tempmeshes.get(), tempmeshes.get() + out.mNumMeshes, meshes);
+
+    ASSIMP_LOG_INFO("BlendModifier: Applied the `Subdivision` modifier to `",
+            orig_object.id.name, "`");
+}
+
+#endif // ASSIMP_BUILD_NO_BLEND_IMPORTER