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FBXConverter.cpp
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FBXConverter.cpp
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/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------
Copyright (c) 2006-2019, 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 FBXConverter.cpp
* @brief Implementation of the FBX DOM -> aiScene converter
*/
#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
#include "FBXConverter.h"
#include "FBXParser.h"
#include "FBXMeshGeometry.h"
#include "FBXDocument.h"
#include "FBXUtil.h"
#include "FBXProperties.h"
#include "FBXImporter.h"
#include <assimp/StringComparison.h>
#include <assimp/scene.h>
#include <assimp/CreateAnimMesh.h>
#include <tuple>
#include <memory>
#include <iterator>
#include <vector>
#include <sstream>
#include <iomanip>
namespace Assimp {
namespace FBX {
using namespace Util;
#define MAGIC_NODE_TAG "_$AssimpFbx$"
#define CONVERT_FBX_TIME(time) static_cast<double>(time) / 46186158000L
FBXConverter::FBXConverter(aiScene* out, const Document& doc)
: defaultMaterialIndex()
, out(out)
, doc(doc) {
// animations need to be converted first since this will
// populate the node_anim_chain_bits map, which is needed
// to determine which nodes need to be generated.
ConvertAnimations();
ConvertRootNode();
if (doc.Settings().readAllMaterials) {
// unfortunately this means we have to evaluate all objects
for (const ObjectMap::value_type& v : doc.Objects()) {
const Object* ob = v.second->Get();
if (!ob) {
continue;
}
const Material* mat = dynamic_cast<const Material*>(ob);
if (mat) {
if (materials_converted.find(mat) == materials_converted.end()) {
ConvertMaterial(*mat, 0);
}
}
}
}
ConvertGlobalSettings();
TransferDataToScene();
// if we didn't read any meshes set the AI_SCENE_FLAGS_INCOMPLETE
// to make sure the scene passes assimp's validation. FBX files
// need not contain geometry (i.e. camera animations, raw armatures).
if (out->mNumMeshes == 0) {
out->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
}
}
FBXConverter::~FBXConverter() {
std::for_each(meshes.begin(), meshes.end(), Util::delete_fun<aiMesh>());
std::for_each(materials.begin(), materials.end(), Util::delete_fun<aiMaterial>());
std::for_each(animations.begin(), animations.end(), Util::delete_fun<aiAnimation>());
std::for_each(lights.begin(), lights.end(), Util::delete_fun<aiLight>());
std::for_each(cameras.begin(), cameras.end(), Util::delete_fun<aiCamera>());
std::for_each(textures.begin(), textures.end(), Util::delete_fun<aiTexture>());
}
void FBXConverter::ConvertRootNode() {
out->mRootNode = new aiNode();
out->mRootNode->mName.Set("RootNode");
// root has ID 0
ConvertNodes(0L, *out->mRootNode);
}
void FBXConverter::ConvertNodes(uint64_t id, aiNode& parent, const aiMatrix4x4& parent_transform) {
const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(id, "Model");
std::vector<aiNode*> nodes;
nodes.reserve(conns.size());
std::vector<aiNode*> nodes_chain;
std::vector<aiNode*> post_nodes_chain;
try {
for (const Connection* con : conns) {
// ignore object-property links
if (con->PropertyName().length()) {
continue;
}
const Object* const object = con->SourceObject();
if (nullptr == object) {
FBXImporter::LogWarn("failed to convert source object for Model link");
continue;
}
const Model* const model = dynamic_cast<const Model*>(object);
if (nullptr != model) {
nodes_chain.clear();
post_nodes_chain.clear();
aiMatrix4x4 new_abs_transform = parent_transform;
// even though there is only a single input node, the design of
// assimp (or rather: the complicated transformation chain that
// is employed by fbx) means that we may need multiple aiNode's
// to represent a fbx node's transformation.
GenerateTransformationNodeChain(*model, nodes_chain, post_nodes_chain);
ai_assert(nodes_chain.size());
std::string original_name = FixNodeName(model->Name());
// check if any of the nodes in the chain has the name the fbx node
// is supposed to have. If there is none, add another node to
// preserve the name - people might have scripts etc. that rely
// on specific node names.
aiNode* name_carrier = NULL;
for (aiNode* prenode : nodes_chain) {
if (!strcmp(prenode->mName.C_Str(), original_name.c_str())) {
name_carrier = prenode;
break;
}
}
if (!name_carrier) {
std::string old_original_name = original_name;
GetUniqueName(old_original_name, original_name);
nodes_chain.push_back(new aiNode(original_name));
}
else {
original_name = nodes_chain.back()->mName.C_Str();
}
//setup metadata on newest node
SetupNodeMetadata(*model, *nodes_chain.back());
// link all nodes in a row
aiNode* last_parent = &parent;
for (aiNode* prenode : nodes_chain) {
ai_assert(prenode);
if (last_parent != &parent) {
last_parent->mNumChildren = 1;
last_parent->mChildren = new aiNode*[1];
last_parent->mChildren[0] = prenode;
}
prenode->mParent = last_parent;
last_parent = prenode;
new_abs_transform *= prenode->mTransformation;
}
// attach geometry
ConvertModel(*model, *nodes_chain.back(), new_abs_transform);
// check if there will be any child nodes
const std::vector<const Connection*>& child_conns
= doc.GetConnectionsByDestinationSequenced(model->ID(), "Model");
// if so, link the geometric transform inverse nodes
// before we attach any child nodes
if (child_conns.size()) {
for (aiNode* postnode : post_nodes_chain) {
ai_assert(postnode);
if (last_parent != &parent) {
last_parent->mNumChildren = 1;
last_parent->mChildren = new aiNode*[1];
last_parent->mChildren[0] = postnode;
}
postnode->mParent = last_parent;
last_parent = postnode;
new_abs_transform *= postnode->mTransformation;
}
}
else {
// free the nodes we allocated as we don't need them
Util::delete_fun<aiNode> deleter;
std::for_each(
post_nodes_chain.begin(),
post_nodes_chain.end(),
deleter
);
}
// attach sub-nodes (if any)
ConvertNodes(model->ID(), *last_parent, new_abs_transform);
if (doc.Settings().readLights) {
ConvertLights(*model, original_name);
}
if (doc.Settings().readCameras) {
ConvertCameras(*model, original_name);
}
nodes.push_back(nodes_chain.front());
nodes_chain.clear();
}
}
if (nodes.size()) {
parent.mChildren = new aiNode*[nodes.size()]();
parent.mNumChildren = static_cast<unsigned int>(nodes.size());
std::swap_ranges(nodes.begin(), nodes.end(), parent.mChildren);
}
}
catch (std::exception&) {
Util::delete_fun<aiNode> deleter;
std::for_each(nodes.begin(), nodes.end(), deleter);
std::for_each(nodes_chain.begin(), nodes_chain.end(), deleter);
std::for_each(post_nodes_chain.begin(), post_nodes_chain.end(), deleter);
}
}
void FBXConverter::ConvertLights(const Model& model, const std::string &orig_name) {
const std::vector<const NodeAttribute*>& node_attrs = model.GetAttributes();
for (const NodeAttribute* attr : node_attrs) {
const Light* const light = dynamic_cast<const Light*>(attr);
if (light) {
ConvertLight(*light, orig_name);
}
}
}
void FBXConverter::ConvertCameras(const Model& model, const std::string &orig_name) {
const std::vector<const NodeAttribute*>& node_attrs = model.GetAttributes();
for (const NodeAttribute* attr : node_attrs) {
const Camera* const cam = dynamic_cast<const Camera*>(attr);
if (cam) {
ConvertCamera(*cam, orig_name);
}
}
}
void FBXConverter::ConvertLight(const Light& light, const std::string &orig_name) {
lights.push_back(new aiLight());
aiLight* const out_light = lights.back();
out_light->mName.Set(orig_name);
const float intensity = light.Intensity() / 100.0f;
const aiVector3D& col = light.Color();
out_light->mColorDiffuse = aiColor3D(col.x, col.y, col.z);
out_light->mColorDiffuse.r *= intensity;
out_light->mColorDiffuse.g *= intensity;
out_light->mColorDiffuse.b *= intensity;
out_light->mColorSpecular = out_light->mColorDiffuse;
//lights are defined along negative y direction
out_light->mPosition = aiVector3D(0.0f);
out_light->mDirection = aiVector3D(0.0f, -1.0f, 0.0f);
out_light->mUp = aiVector3D(0.0f, 0.0f, -1.0f);
switch (light.LightType())
{
case Light::Type_Point:
out_light->mType = aiLightSource_POINT;
break;
case Light::Type_Directional:
out_light->mType = aiLightSource_DIRECTIONAL;
break;
case Light::Type_Spot:
out_light->mType = aiLightSource_SPOT;
out_light->mAngleOuterCone = AI_DEG_TO_RAD(light.OuterAngle());
out_light->mAngleInnerCone = AI_DEG_TO_RAD(light.InnerAngle());
break;
case Light::Type_Area:
FBXImporter::LogWarn("cannot represent area light, set to UNDEFINED");
out_light->mType = aiLightSource_UNDEFINED;
break;
case Light::Type_Volume:
FBXImporter::LogWarn("cannot represent volume light, set to UNDEFINED");
out_light->mType = aiLightSource_UNDEFINED;
break;
default:
ai_assert(false);
}
float decay = light.DecayStart();
switch (light.DecayType())
{
case Light::Decay_None:
out_light->mAttenuationConstant = decay;
out_light->mAttenuationLinear = 0.0f;
out_light->mAttenuationQuadratic = 0.0f;
break;
case Light::Decay_Linear:
out_light->mAttenuationConstant = 0.0f;
out_light->mAttenuationLinear = 2.0f / decay;
out_light->mAttenuationQuadratic = 0.0f;
break;
case Light::Decay_Quadratic:
out_light->mAttenuationConstant = 0.0f;
out_light->mAttenuationLinear = 0.0f;
out_light->mAttenuationQuadratic = 2.0f / (decay * decay);
break;
case Light::Decay_Cubic:
FBXImporter::LogWarn("cannot represent cubic attenuation, set to Quadratic");
out_light->mAttenuationQuadratic = 1.0f;
break;
default:
ai_assert(false);
}
}
void FBXConverter::ConvertCamera(const Camera& cam, const std::string &orig_name)
{
cameras.push_back(new aiCamera());
aiCamera* const out_camera = cameras.back();
out_camera->mName.Set(orig_name);
out_camera->mAspect = cam.AspectWidth() / cam.AspectHeight();
//cameras are defined along positive x direction
out_camera->mPosition = cam.Position();
out_camera->mLookAt = (cam.InterestPosition() - out_camera->mPosition).Normalize();
out_camera->mUp = cam.UpVector();
out_camera->mHorizontalFOV = AI_DEG_TO_RAD(cam.FieldOfView());
out_camera->mClipPlaneNear = cam.NearPlane();
out_camera->mClipPlaneFar = cam.FarPlane();
}
void FBXConverter::GetUniqueName(const std::string &name, std::string &uniqueName)
{
int i = 0;
uniqueName = name;
while (mNodeNames.find(uniqueName) != mNodeNames.end())
{
++i;
std::stringstream ext;
ext << name << std::setfill('0') << std::setw(3) << i;
uniqueName = ext.str();
}
mNodeNames.insert(uniqueName);
}
const char* FBXConverter::NameTransformationComp(TransformationComp comp) {
switch (comp) {
case TransformationComp_Translation:
return "Translation";
case TransformationComp_RotationOffset:
return "RotationOffset";
case TransformationComp_RotationPivot:
return "RotationPivot";
case TransformationComp_PreRotation:
return "PreRotation";
case TransformationComp_Rotation:
return "Rotation";
case TransformationComp_PostRotation:
return "PostRotation";
case TransformationComp_RotationPivotInverse:
return "RotationPivotInverse";
case TransformationComp_ScalingOffset:
return "ScalingOffset";
case TransformationComp_ScalingPivot:
return "ScalingPivot";
case TransformationComp_Scaling:
return "Scaling";
case TransformationComp_ScalingPivotInverse:
return "ScalingPivotInverse";
case TransformationComp_GeometricScaling:
return "GeometricScaling";
case TransformationComp_GeometricRotation:
return "GeometricRotation";
case TransformationComp_GeometricTranslation:
return "GeometricTranslation";
case TransformationComp_GeometricScalingInverse:
return "GeometricScalingInverse";
case TransformationComp_GeometricRotationInverse:
return "GeometricRotationInverse";
case TransformationComp_GeometricTranslationInverse:
return "GeometricTranslationInverse";
case TransformationComp_MAXIMUM: // this is to silence compiler warnings
default:
break;
}
ai_assert(false);
return nullptr;
}
const char* FBXConverter::NameTransformationCompProperty(TransformationComp comp) {
switch (comp) {
case TransformationComp_Translation:
return "Lcl Translation";
case TransformationComp_RotationOffset:
return "RotationOffset";
case TransformationComp_RotationPivot:
return "RotationPivot";
case TransformationComp_PreRotation:
return "PreRotation";
case TransformationComp_Rotation:
return "Lcl Rotation";
case TransformationComp_PostRotation:
return "PostRotation";
case TransformationComp_RotationPivotInverse:
return "RotationPivotInverse";
case TransformationComp_ScalingOffset:
return "ScalingOffset";
case TransformationComp_ScalingPivot:
return "ScalingPivot";
case TransformationComp_Scaling:
return "Lcl Scaling";
case TransformationComp_ScalingPivotInverse:
return "ScalingPivotInverse";
case TransformationComp_GeometricScaling:
return "GeometricScaling";
case TransformationComp_GeometricRotation:
return "GeometricRotation";
case TransformationComp_GeometricTranslation:
return "GeometricTranslation";
case TransformationComp_GeometricScalingInverse:
return "GeometricScalingInverse";
case TransformationComp_GeometricRotationInverse:
return "GeometricRotationInverse";
case TransformationComp_GeometricTranslationInverse:
return "GeometricTranslationInverse";
case TransformationComp_MAXIMUM: // this is to silence compiler warnings
break;
}
ai_assert(false);
return nullptr;
}
aiVector3D FBXConverter::TransformationCompDefaultValue(TransformationComp comp)
{
// XXX a neat way to solve the never-ending special cases for scaling
// would be to do everything in log space!
return comp == TransformationComp_Scaling ? aiVector3D(1.f, 1.f, 1.f) : aiVector3D();
}
void FBXConverter::GetRotationMatrix(Model::RotOrder mode, const aiVector3D& rotation, aiMatrix4x4& out)
{
if (mode == Model::RotOrder_SphericXYZ) {
FBXImporter::LogError("Unsupported RotationMode: SphericXYZ");
out = aiMatrix4x4();
return;
}
const float angle_epsilon = 1e-6f;
out = aiMatrix4x4();
bool is_id[3] = { true, true, true };
aiMatrix4x4 temp[3];
if (std::fabs(rotation.z) > angle_epsilon) {
aiMatrix4x4::RotationZ(AI_DEG_TO_RAD(rotation.z), temp[2]);
is_id[2] = false;
}
if (std::fabs(rotation.y) > angle_epsilon) {
aiMatrix4x4::RotationY(AI_DEG_TO_RAD(rotation.y), temp[1]);
is_id[1] = false;
}
if (std::fabs(rotation.x) > angle_epsilon) {
aiMatrix4x4::RotationX(AI_DEG_TO_RAD(rotation.x), temp[0]);
is_id[0] = false;
}
int order[3] = { -1, -1, -1 };
// note: rotation order is inverted since we're left multiplying as is usual in assimp
switch (mode)
{
case Model::RotOrder_EulerXYZ:
order[0] = 2;
order[1] = 1;
order[2] = 0;
break;
case Model::RotOrder_EulerXZY:
order[0] = 1;
order[1] = 2;
order[2] = 0;
break;
case Model::RotOrder_EulerYZX:
order[0] = 0;
order[1] = 2;
order[2] = 1;
break;
case Model::RotOrder_EulerYXZ:
order[0] = 2;
order[1] = 0;
order[2] = 1;
break;
case Model::RotOrder_EulerZXY:
order[0] = 1;
order[1] = 0;
order[2] = 2;
break;
case Model::RotOrder_EulerZYX:
order[0] = 0;
order[1] = 1;
order[2] = 2;
break;
default:
ai_assert(false);
break;
}
ai_assert(order[0] >= 0);
ai_assert(order[0] <= 2);
ai_assert(order[1] >= 0);
ai_assert(order[1] <= 2);
ai_assert(order[2] >= 0);
ai_assert(order[2] <= 2);
if (!is_id[order[0]]) {
out = temp[order[0]];
}
if (!is_id[order[1]]) {
out = out * temp[order[1]];
}
if (!is_id[order[2]]) {
out = out * temp[order[2]];
}
}
bool FBXConverter::NeedsComplexTransformationChain(const Model& model)
{
const PropertyTable& props = model.Props();
bool ok;
const float zero_epsilon = 1e-6f;
const aiVector3D all_ones(1.0f, 1.0f, 1.0f);
for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i) {
const TransformationComp comp = static_cast<TransformationComp>(i);
if (comp == TransformationComp_Rotation || comp == TransformationComp_Scaling || comp == TransformationComp_Translation) {
continue;
}
bool scale_compare = (comp == TransformationComp_GeometricScaling || comp == TransformationComp_Scaling);
const aiVector3D& v = PropertyGet<aiVector3D>(props, NameTransformationCompProperty(comp), ok);
if (ok && scale_compare) {
if ((v - all_ones).SquareLength() > zero_epsilon) {
return true;
}
}
else if (ok) {
if (v.SquareLength() > zero_epsilon) {
return true;
}
}
}
return false;
}
std::string FBXConverter::NameTransformationChainNode(const std::string& name, TransformationComp comp)
{
return name + std::string(MAGIC_NODE_TAG) + "_" + NameTransformationComp(comp);
}
void FBXConverter::GenerateTransformationNodeChain(const Model& model, std::vector<aiNode*>& output_nodes,
std::vector<aiNode*>& post_output_nodes) {
const PropertyTable& props = model.Props();
const Model::RotOrder rot = model.RotationOrder();
bool ok;
aiMatrix4x4 chain[TransformationComp_MAXIMUM];
std::fill_n(chain, static_cast<unsigned int>(TransformationComp_MAXIMUM), aiMatrix4x4());
// generate transformation matrices for all the different transformation components
const float zero_epsilon = 1e-6f;
const aiVector3D all_ones(1.0f, 1.0f, 1.0f);
bool is_complex = false;
const aiVector3D& PreRotation = PropertyGet<aiVector3D>(props, "PreRotation", ok);
if (ok && PreRotation.SquareLength() > zero_epsilon) {
is_complex = true;
GetRotationMatrix(Model::RotOrder::RotOrder_EulerXYZ, PreRotation, chain[TransformationComp_PreRotation]);
}
const aiVector3D& PostRotation = PropertyGet<aiVector3D>(props, "PostRotation", ok);
if (ok && PostRotation.SquareLength() > zero_epsilon) {
is_complex = true;
GetRotationMatrix(Model::RotOrder::RotOrder_EulerXYZ, PostRotation, chain[TransformationComp_PostRotation]);
}
const aiVector3D& RotationPivot = PropertyGet<aiVector3D>(props, "RotationPivot", ok);
if (ok && RotationPivot.SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Translation(RotationPivot, chain[TransformationComp_RotationPivot]);
aiMatrix4x4::Translation(-RotationPivot, chain[TransformationComp_RotationPivotInverse]);
}
const aiVector3D& RotationOffset = PropertyGet<aiVector3D>(props, "RotationOffset", ok);
if (ok && RotationOffset.SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Translation(RotationOffset, chain[TransformationComp_RotationOffset]);
}
const aiVector3D& ScalingOffset = PropertyGet<aiVector3D>(props, "ScalingOffset", ok);
if (ok && ScalingOffset.SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Translation(ScalingOffset, chain[TransformationComp_ScalingOffset]);
}
const aiVector3D& ScalingPivot = PropertyGet<aiVector3D>(props, "ScalingPivot", ok);
if (ok && ScalingPivot.SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Translation(ScalingPivot, chain[TransformationComp_ScalingPivot]);
aiMatrix4x4::Translation(-ScalingPivot, chain[TransformationComp_ScalingPivotInverse]);
}
const aiVector3D& Translation = PropertyGet<aiVector3D>(props, "Lcl Translation", ok);
if (ok && Translation.SquareLength() > zero_epsilon) {
aiMatrix4x4::Translation(Translation, chain[TransformationComp_Translation]);
}
const aiVector3D& Scaling = PropertyGet<aiVector3D>(props, "Lcl Scaling", ok);
if (ok && (Scaling - all_ones).SquareLength() > zero_epsilon) {
aiMatrix4x4::Scaling(Scaling, chain[TransformationComp_Scaling]);
}
const aiVector3D& Rotation = PropertyGet<aiVector3D>(props, "Lcl Rotation", ok);
if (ok && Rotation.SquareLength() > zero_epsilon) {
GetRotationMatrix(rot, Rotation, chain[TransformationComp_Rotation]);
}
const aiVector3D& GeometricScaling = PropertyGet<aiVector3D>(props, "GeometricScaling", ok);
if (ok && (GeometricScaling - all_ones).SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Scaling(GeometricScaling, chain[TransformationComp_GeometricScaling]);
aiVector3D GeometricScalingInverse = GeometricScaling;
bool canscale = true;
for (unsigned int i = 0; i < 3; ++i) {
if (std::fabs(GeometricScalingInverse[i]) > zero_epsilon) {
GeometricScalingInverse[i] = 1.0f / GeometricScaling[i];
}
else {
FBXImporter::LogError("cannot invert geometric scaling matrix with a 0.0 scale component");
canscale = false;
break;
}
}
if (canscale) {
aiMatrix4x4::Scaling(GeometricScalingInverse, chain[TransformationComp_GeometricScalingInverse]);
}
}
const aiVector3D& GeometricRotation = PropertyGet<aiVector3D>(props, "GeometricRotation", ok);
if (ok && GeometricRotation.SquareLength() > zero_epsilon) {
is_complex = true;
GetRotationMatrix(rot, GeometricRotation, chain[TransformationComp_GeometricRotation]);
GetRotationMatrix(rot, GeometricRotation, chain[TransformationComp_GeometricRotationInverse]);
chain[TransformationComp_GeometricRotationInverse].Inverse();
}
const aiVector3D& GeometricTranslation = PropertyGet<aiVector3D>(props, "GeometricTranslation", ok);
if (ok && GeometricTranslation.SquareLength() > zero_epsilon) {
is_complex = true;
aiMatrix4x4::Translation(GeometricTranslation, chain[TransformationComp_GeometricTranslation]);
aiMatrix4x4::Translation(-GeometricTranslation, chain[TransformationComp_GeometricTranslationInverse]);
}
// is_complex needs to be consistent with NeedsComplexTransformationChain()
// or the interplay between this code and the animation converter would
// not be guaranteed.
ai_assert(NeedsComplexTransformationChain(model) == is_complex);
std::string name = FixNodeName(model.Name());
// now, if we have more than just Translation, Scaling and Rotation,
// we need to generate a full node chain to accommodate for assimp's
// lack to express pivots and offsets.
if (is_complex && doc.Settings().preservePivots) {
FBXImporter::LogInfo("generating full transformation chain for node: " + name);
// query the anim_chain_bits dictionary to find out which chain elements
// have associated node animation channels. These can not be dropped
// even if they have identity transform in bind pose.
NodeAnimBitMap::const_iterator it = node_anim_chain_bits.find(name);
const unsigned int anim_chain_bitmask = (it == node_anim_chain_bits.end() ? 0 : (*it).second);
unsigned int bit = 0x1;
for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i, bit <<= 1) {
const TransformationComp comp = static_cast<TransformationComp>(i);
if (chain[i].IsIdentity() && (anim_chain_bitmask & bit) == 0) {
continue;
}
if (comp == TransformationComp_PostRotation) {
chain[i] = chain[i].Inverse();
}
aiNode* nd = new aiNode();
nd->mName.Set(NameTransformationChainNode(name, comp));
nd->mTransformation = chain[i];
// geometric inverses go in a post-node chain
if (comp == TransformationComp_GeometricScalingInverse ||
comp == TransformationComp_GeometricRotationInverse ||
comp == TransformationComp_GeometricTranslationInverse
) {
post_output_nodes.push_back(nd);
}
else {
output_nodes.push_back(nd);
}
}
ai_assert(output_nodes.size());
return;
}
// else, we can just multiply the matrices together
aiNode* nd = new aiNode();
output_nodes.push_back(nd);
std::string uniqueName;
GetUniqueName(name, uniqueName);
nd->mName.Set(uniqueName);
for (const auto &transform : chain) {
nd->mTransformation = nd->mTransformation * transform;
}
}
void FBXConverter::SetupNodeMetadata(const Model& model, aiNode& nd)
{
const PropertyTable& props = model.Props();
DirectPropertyMap unparsedProperties = props.GetUnparsedProperties();
// create metadata on node
const std::size_t numStaticMetaData = 2;
aiMetadata* data = aiMetadata::Alloc(static_cast<unsigned int>(unparsedProperties.size() + numStaticMetaData));
nd.mMetaData = data;
int index = 0;
// find user defined properties (3ds Max)
data->Set(index++, "UserProperties", aiString(PropertyGet<std::string>(props, "UDP3DSMAX", "")));
// preserve the info that a node was marked as Null node in the original file.
data->Set(index++, "IsNull", model.IsNull() ? true : false);
// add unparsed properties to the node's metadata
for (const DirectPropertyMap::value_type& prop : unparsedProperties) {
// Interpret the property as a concrete type
if (const TypedProperty<bool>* interpreted = prop.second->As<TypedProperty<bool> >()) {
data->Set(index++, prop.first, interpreted->Value());
}
else if (const TypedProperty<int>* interpreted = prop.second->As<TypedProperty<int> >()) {
data->Set(index++, prop.first, interpreted->Value());
}
else if (const TypedProperty<uint64_t>* interpreted = prop.second->As<TypedProperty<uint64_t> >()) {
data->Set(index++, prop.first, interpreted->Value());
}
else if (const TypedProperty<float>* interpreted = prop.second->As<TypedProperty<float> >()) {
data->Set(index++, prop.first, interpreted->Value());
}
else if (const TypedProperty<std::string>* interpreted = prop.second->As<TypedProperty<std::string> >()) {
data->Set(index++, prop.first, aiString(interpreted->Value()));
}
else if (const TypedProperty<aiVector3D>* interpreted = prop.second->As<TypedProperty<aiVector3D> >()) {
data->Set(index++, prop.first, interpreted->Value());
}
else {
ai_assert(false);
}
}
}
void FBXConverter::ConvertModel(const Model& model, aiNode& nd, const aiMatrix4x4& node_global_transform)
{
const std::vector<const Geometry*>& geos = model.GetGeometry();
std::vector<unsigned int> meshes;
meshes.reserve(geos.size());
for (const Geometry* geo : geos) {
const MeshGeometry* const mesh = dynamic_cast<const MeshGeometry*>(geo);
const LineGeometry* const line = dynamic_cast<const LineGeometry*>(geo);
if (mesh) {
const std::vector<unsigned int>& indices = ConvertMesh(*mesh, model, node_global_transform, nd);
std::copy(indices.begin(), indices.end(), std::back_inserter(meshes));
}
else if (line) {
const std::vector<unsigned int>& indices = ConvertLine(*line, model, node_global_transform, nd);
std::copy(indices.begin(), indices.end(), std::back_inserter(meshes));
}
else {
FBXImporter::LogWarn("ignoring unrecognized geometry: " + geo->Name());
}
}
if (meshes.size()) {
nd.mMeshes = new unsigned int[meshes.size()]();
nd.mNumMeshes = static_cast<unsigned int>(meshes.size());
std::swap_ranges(meshes.begin(), meshes.end(), nd.mMeshes);
}
}
std::vector<unsigned int> FBXConverter::ConvertMesh(const MeshGeometry& mesh, const Model& model,
const aiMatrix4x4& node_global_transform, aiNode& nd)
{
std::vector<unsigned int> temp;
MeshMap::const_iterator it = meshes_converted.find(&mesh);
if (it != meshes_converted.end()) {
std::copy((*it).second.begin(), (*it).second.end(), std::back_inserter(temp));
return temp;
}
const std::vector<aiVector3D>& vertices = mesh.GetVertices();
const std::vector<unsigned int>& faces = mesh.GetFaceIndexCounts();
if (vertices.empty() || faces.empty()) {
FBXImporter::LogWarn("ignoring empty geometry: " + mesh.Name());
return temp;
}
// one material per mesh maps easily to aiMesh. Multiple material
// meshes need to be split.
const MatIndexArray& mindices = mesh.GetMaterialIndices();
if (doc.Settings().readMaterials && !mindices.empty()) {
const MatIndexArray::value_type base = mindices[0];
for (MatIndexArray::value_type index : mindices) {
if (index != base) {
return ConvertMeshMultiMaterial(mesh, model, node_global_transform, nd);
}
}
}
// faster code-path, just copy the data
temp.push_back(ConvertMeshSingleMaterial(mesh, model, node_global_transform, nd));
return temp;
}
std::vector<unsigned int> FBXConverter::ConvertLine(const LineGeometry& line, const Model& model,
const aiMatrix4x4& node_global_transform, aiNode& nd)
{
std::vector<unsigned int> temp;
const std::vector<aiVector3D>& vertices = line.GetVertices();
const std::vector<int>& indices = line.GetIndices();
if (vertices.empty() || indices.empty()) {
FBXImporter::LogWarn("ignoring empty line: " + line.Name());
return temp;
}
aiMesh* const out_mesh = SetupEmptyMesh(line, nd);
out_mesh->mPrimitiveTypes |= aiPrimitiveType_LINE;
// copy vertices
out_mesh->mNumVertices = static_cast<unsigned int>(vertices.size());
out_mesh->mVertices = new aiVector3D[out_mesh->mNumVertices];
std::copy(vertices.begin(), vertices.end(), out_mesh->mVertices);
//Number of line segments (faces) is "Number of Points - Number of Endpoints"
//N.B.: Endpoints in FbxLine are denoted by negative indices.
//If such an Index is encountered, add 1 and multiply by -1 to get the real index.
unsigned int epcount = 0;
for (unsigned i = 0; i < indices.size(); i++)
{
if (indices[i] < 0) epcount++;
}
unsigned int pcount = indices.size();
unsigned int scount = out_mesh->mNumFaces = pcount - epcount;
aiFace* fac = out_mesh->mFaces = new aiFace[scount]();
for (unsigned int i = 0; i < pcount; ++i) {
if (indices[i] < 0) continue;
aiFace& f = *fac++;
f.mNumIndices = 2; //2 == aiPrimitiveType_LINE
f.mIndices = new unsigned int[2];
f.mIndices[0] = indices[i];
int segid = indices[(i + 1 == pcount ? 0 : i + 1)]; //If we have reached he last point, wrap around
f.mIndices[1] = (segid < 0 ? (segid + 1)*-1 : segid); //Convert EndPoint Index to normal Index
}
temp.push_back(static_cast<unsigned int>(meshes.size() - 1));
return temp;
}
aiMesh* FBXConverter::SetupEmptyMesh(const Geometry& mesh, aiNode& nd)
{
aiMesh* const out_mesh = new aiMesh();
meshes.push_back(out_mesh);
meshes_converted[&mesh].push_back(static_cast<unsigned int>(meshes.size() - 1));
// set name
std::string name = mesh.Name();
if (name.substr(0, 10) == "Geometry::") {
name = name.substr(10);
}
if (name.length()) {
out_mesh->mName.Set(name);
}
else
{
out_mesh->mName = nd.mName;
}
return out_mesh;
}
unsigned int FBXConverter::ConvertMeshSingleMaterial(const MeshGeometry& mesh, const Model& model,
const aiMatrix4x4& node_global_transform, aiNode& nd)
{