collada_utils.cpp

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/* SPDX-FileCopyrightText: 2010-2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "COLLADAFWMeshVertexData.h"
#include "COLLADAFWNode.h"
 
#include <set>
#include <string>
 
#include "DNA_armature_types.h"
#include "DNA_constraint_types.h"
#include "DNA_customdata_types.h"
#include "DNA_key_types.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
 
#include "BLI_linklist.h"
#include "BLI_listbase.h"
#include "BLI_math_matrix.h"
#include "BLI_string.h"
 
#include "BKE_action.hh"
#include "BKE_armature.hh"
#include "BKE_constraint.h"
#include "BKE_context.hh"
#include "BKE_customdata.hh"
#include "BKE_global.hh"
#include "BKE_idprop.hh"
#include "BKE_key.hh"
#include "BKE_layer.hh"
#include "BKE_lib_id.hh"
#include "BKE_material.hh"
#include "BKE_mesh.hh"
#include "BKE_mesh_legacy_convert.hh"
#include "BKE_mesh_runtime.hh"
#include "BKE_mesh_wrapper.hh"
#include "BKE_node.hh"
#include "BKE_node_legacy_types.hh"
#include "BKE_node_runtime.hh"
#include "BKE_object.hh"
#include "BKE_scene.hh"
 
#include "ANIM_action.hh"
#include "ANIM_action_legacy.hh"
#include "ANIM_bone_collections.hh"
 
#include "ED_node.hh"
#include "ED_object.hh"
#include "ED_screen.hh"
 
#include "WM_api.hh" /* XXX hrm, see if we can do without this */
#include "WM_types.hh"
 
#include "bmesh.hh"
#include "bmesh_tools.hh"
 
#include "DEG_depsgraph.hh"
#include "DEG_depsgraph_query.hh"
 
#include "BlenderContext.h"
#include "ExportSettings.h"
#include "ExtraTags.h"
#include "collada_utils.h"
 
float bc_get_float_value(const COLLADAFW::FloatOrDoubleArray &array, uint index)
{
  if (index >= array.getValuesCount()) {
    return 0.0f;
  }
 
  if (array.getType() == COLLADAFW::MeshVertexData::DATA_TYPE_FLOAT) {
    return array.getFloatValues()->getData()[index];
  }
 
  return array.getDoubleValues()->getData()[index];
}
 
int bc_test_parent_loop(Object *par, Object *ob)
{
  /* Copied from `editors/object/object_relations.cc`. */
 
  /* test if 'ob' is a parent somewhere in par's parents */
 
  if (par == nullptr) {
    return 0;
  }
  if (ob == par) {
    return 1;
  }
 
  return bc_test_parent_loop(par->parent, ob);
}
 
bool bc_validateConstraints(bConstraint *con)
{
  const bConstraintTypeInfo *cti = BKE_constraint_typeinfo_get(con);
 
  /* these we can skip completely (invalid constraints...) */
  if (cti == nullptr) {
    return false;
  }
  if (con->flag & (CONSTRAINT_DISABLE | CONSTRAINT_OFF)) {
    return false;
  }
 
  /* these constraints can't be evaluated anyway */
  if (cti->evaluate_constraint == nullptr) {
    return false;
  }
 
  /* influence == 0 should be ignored */
  if (con->enforce == 0.0f) {
    return false;
  }
 
  /* validation passed */
  return true;
}
 
bool bc_set_parent(Object *ob, Object *par, bContext *C, bool is_parent_space)
{
  Scene *scene = CTX_data_scene(C);
  int partype = blender::ed::object::PAR_OBJECT;
  const bool xmirror = false;
  const bool keep_transform = false;
 
  if (par && is_parent_space) {
    mul_m4_m4m4(ob->runtime->object_to_world.ptr(),
                par->object_to_world().ptr(),
                ob->object_to_world().ptr());
  }
 
  bool ok = blender::ed::object::parent_set(
      nullptr, C, scene, ob, par, partype, xmirror, keep_transform, nullptr);
  return ok;
}
 
std::vector<bAction *> bc_getSceneActions(const bContext *C, Object *ob, bool all_actions)
{
  std::vector<bAction *> actions;
  if (all_actions) {
    Main *bmain = CTX_data_main(C);
    ID *id;
 
    for (id = (ID *)bmain->actions.first; id; id = (ID *)(id->next)) {
      bAction *act = (bAction *)id;
      /* XXX This currently creates too many actions.
       * TODO: Need to check if the action is compatible to the given object. */
      actions.push_back(act);
    }
  }
  else {
    bAction *action = bc_getSceneObjectAction(ob);
    actions.push_back(action);
  }
 
  return actions;
}
 
std::string bc_get_action_id(const std::string &action_name,
                             const std::string &ob_name,
                             const std::string &channel_type,
                             const std::string &axis_name,
                             const std::string &axis_separator)
{
  std::string result = action_name + "_" + channel_type;
  if (ob_name.length() > 0) {
    result = ob_name + "_" + result;
  }
  if (axis_name.length() > 0) {
    result += axis_separator + axis_name;
  }
  return translate_id(result);
}
 
void bc_update_scene(BlenderContext &blender_context, float ctime)
{
  Main *bmain = blender_context.get_main();
  Scene *scene = blender_context.get_scene();
  Depsgraph *depsgraph = blender_context.get_depsgraph();
 
  /* See remark in `physics_fluid.cc` lines 395...) */
  // BKE_scene_update_for_newframe(ev_context, bmain, scene, scene->lay);
  BKE_scene_frame_set(scene, ctime);
  ED_update_for_newframe(bmain, depsgraph);
}
 
Object *bc_add_object(Main *bmain, Scene *scene, ViewLayer *view_layer, int type, const char *name)
{
  Object *ob = BKE_object_add_only_object(bmain, type, name);
 
  ob->data = BKE_object_obdata_add_from_type(bmain, type, name);
  DEG_id_tag_update(&ob->id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY | ID_RECALC_ANIMATION);
 
  LayerCollection *layer_collection = BKE_layer_collection_get_active(view_layer);
  BKE_collection_object_add(bmain, layer_collection->collection, ob);
 
  BKE_view_layer_synced_ensure(scene, view_layer);
  Base *base = BKE_view_layer_base_find(view_layer, ob);
  /* TODO: is setting active needed? */
  BKE_view_layer_base_select_and_set_active(view_layer, base);
 
  return ob;
}
 
static void bc_add_armature_collections(COLLADAFW::Node *node,
                                        ExtraTags *node_extra_tags,
                                        bArmature *arm)
{
  if (!node_extra_tags) {
    /* No 'extra' tags means that there are no bone collections. */
    return;
  }
 
  std::vector<std::string> collection_names = node_extra_tags->dataSplitString("collections");
  std::vector<std::string> visible_names = node_extra_tags->dataSplitString("visible_collections");
  std::set<std::string> visible_names_set(visible_names.begin(), visible_names.end());
  for (const std::string &name : collection_names) {
    BoneCollection *bcoll = ANIM_armature_bonecoll_new(arm, name.c_str());
    if (visible_names_set.find(name) == visible_names_set.end()) {
      ANIM_bonecoll_hide(arm, bcoll);
    }
    else {
      ANIM_bonecoll_show(arm, bcoll);
    }
  }
 
  std::string active_name;
  active_name = node_extra_tags->setData("active_collection", active_name);
  ANIM_armature_bonecoll_active_name_set(arm, active_name.c_str());
}
 
Object *bc_add_armature(COLLADAFW::Node *node,
                        ExtraTags *node_extra_tags,
                        Main *bmain,
                        Scene *scene,
                        ViewLayer *view_layer,
                        int type,
                        const char *name)
{
  Object *ob = bc_add_object(bmain, scene, view_layer, type, name);
  bc_add_armature_collections(node, node_extra_tags, reinterpret_cast<bArmature *>(ob->data));
  return ob;
}
 
Mesh *bc_get_mesh_copy(BlenderContext &blender_context,
                       Object *ob,
                       BC_export_mesh_type export_mesh_type,
                       bool apply_modifiers,
                       bool triangulate)
{
  const Mesh *tmpmesh = nullptr;
  if (apply_modifiers) {
#if 0 /* Not supported by new system currently... */
    switch (export_mesh_type) {
      case BC_MESH_TYPE_VIEW: {
        dm = mesh_create_derived_view(depsgraph, scene, ob, &mask);
        break;
      }
      case BC_MESH_TYPE_RENDER: {
        dm = mesh_create_derived_render(depsgraph, scene, ob, &mask);
        break;
      }
    }
#else
    Depsgraph *depsgraph = blender_context.get_depsgraph();
    const Object *ob_eval = DEG_get_evaluated(depsgraph, ob);
    tmpmesh = BKE_object_get_evaluated_mesh(ob_eval);
#endif
  }
  else {
    tmpmesh = (Mesh *)ob->data;
  }
 
  Mesh *mesh = BKE_mesh_copy_for_eval(*tmpmesh);
 
  /* Ensure data exists if currently in edit mode. */
  BKE_mesh_wrapper_ensure_mdata(mesh);
 
  if (triangulate) {
    bc_triangulate_mesh(mesh);
  }
  BKE_mesh_tessface_ensure(mesh);
 
  return mesh;
}
 
Object *bc_get_assigned_armature(Object *ob)
{
  Object *ob_arm = nullptr;
 
  if (ob->parent && ob->partype == PARSKEL && ob->parent->type == OB_ARMATURE) {
    ob_arm = ob->parent;
  }
  else {
    LISTBASE_FOREACH (ModifierData *, mod, &ob->modifiers) {
      if (mod->type == eModifierType_Armature) {
        ob_arm = ((ArmatureModifierData *)mod)->object;
      }
    }
  }
 
  return ob_arm;
}
 
bool bc_has_object_type(LinkNode *export_set, short obtype)
{
  LinkNode *node;
 
  for (node = export_set; node; node = node->next) {
    Object *ob = (Object *)node->link;
    /* XXX: why is this checking for ob->data? - we could be looking for empties. */
    if (ob->type == obtype && ob->data) {
      return true;
    }
  }
  return false;
}
 
void bc_bubble_sort_by_Object_name(LinkNode *export_set)
{
  /* Use bubble sort algorithm for sorting the export set. */
 
  bool sorted = false;
  LinkNode *node;
  for (node = export_set; node->next && !sorted; node = node->next) {
 
    sorted = true;
 
    LinkNode *current;
    for (current = export_set; current->next; current = current->next) {
      Object *a = (Object *)current->link;
      Object *b = (Object *)current->next->link;
 
      if (strcmp(a->id.name, b->id.name) > 0) {
        current->link = b;
        current->next->link = a;
        sorted = false;
      }
    }
  }
}
 
bool bc_is_root_bone(Bone *aBone, bool deform_bones_only)
{
  if (deform_bones_only) {
    Bone *root = nullptr;
    Bone *bone = aBone;
    while (bone) {
      if (!(bone->flag & BONE_NO_DEFORM)) {
        root = bone;
      }
      bone = bone->parent;
    }
    return (aBone == root);
  }
 
  return !(aBone->parent);
}
 
int bc_get_active_UVLayer(Object *ob)
{
  Mesh *mesh = (Mesh *)ob->data;
  return CustomData_get_active_layer_index(&mesh->corner_data, CD_PROP_FLOAT2);
}
 
std::string bc_url_encode(const std::string &data)
{
  /* XXX We probably do not need to do a full encoding.
   * But in case that is necessary,then it can be added here.
   */
  return bc_replace_string(data, "#", "%23");
}
 
std::string bc_replace_string(std::string data,
                              const std::string &pattern,
                              const std::string &replacement)
{
  size_t pos = 0;
  while ((pos = data.find(pattern, pos)) != std::string::npos) {
    data.replace(pos, pattern.length(), replacement);
    pos += replacement.length();
  }
  return data;
}
 
void bc_match_scale(Object *ob, UnitConverter &bc_unit, bool scale_to_scene)
{
  if (scale_to_scene) {
    mul_m4_m4m4(
        ob->runtime->object_to_world.ptr(), bc_unit.get_scale(), ob->object_to_world().ptr());
  }
  mul_m4_m4m4(
      ob->runtime->object_to_world.ptr(), bc_unit.get_rotation(), ob->object_to_world().ptr());
  BKE_object_apply_mat4(ob, ob->object_to_world().ptr(), false, false);
}
 
void bc_match_scale(std::vector<Object *> *objects_done,
                    UnitConverter &bc_unit,
                    bool scale_to_scene)
{
  for (Object *ob : *objects_done) {
    if (ob->parent == nullptr) {
      bc_match_scale(ob, bc_unit, scale_to_scene);
    }
  }
}
 
void bc_decompose(float mat[4][4], float *loc, float eul[3], float quat[4], float *size)
{
  if (size) {
    mat4_to_size(size, mat);
  }
 
  if (eul) {
    mat4_to_eul(eul, mat);
  }
 
  if (quat) {
    mat4_to_quat(quat, mat);
  }
 
  if (loc) {
    copy_v3_v3(loc, mat[3]);
  }
}
 
void bc_rotate_from_reference_quat(float quat_to[4], float quat_from[4], float mat_to[4][4])
{
  float qd[4];
  float matd[4][4];
  float mati[4][4];
  float mat_from[4][4];
  quat_to_mat4(mat_from, quat_from);
 
  /* Calculate the difference matrix matd between mat_from and mat_to */
  invert_m4_m4(mati, mat_from);
  mul_m4_m4m4(matd, mati, mat_to);
 
  mat4_to_quat(qd, matd);
 
  mul_qt_qtqt(quat_to, qd, quat_from); /* rot is the final rotation corresponding to mat_to */
}
 
void bc_triangulate_mesh(Mesh *mesh)
{
  bool use_beauty = false;
  bool tag_only = false;
 
  /* XXX: The triangulation method selection could be offered in the UI. */
  int quad_method = MOD_TRIANGULATE_QUAD_SHORTEDGE;
 
  const BMeshCreateParams bm_create_params{};
  BMesh *bm = BM_mesh_create(&bm_mesh_allocsize_default, &bm_create_params);
  BMeshFromMeshParams bm_from_me_params{};
  bm_from_me_params.calc_face_normal = true;
  bm_from_me_params.calc_vert_normal = true;
  BM_mesh_bm_from_me(bm, mesh, &bm_from_me_params);
  BM_mesh_triangulate(bm, quad_method, use_beauty, 4, tag_only, nullptr, nullptr, nullptr);
 
  BMeshToMeshParams bm_to_me_params{};
  bm_to_me_params.calc_object_remap = false;
  BM_mesh_bm_to_me(nullptr, bm, mesh, &bm_to_me_params);
  BM_mesh_free(bm);
}
 
bool bc_is_leaf_bone(Bone *bone)
{
  LISTBASE_FOREACH (Bone *, child, &bone->childbase) {
    if (child->flag & BONE_CONNECTED) {
      return false;
    }
  }
  return true;
}
 
EditBone *bc_get_edit_bone(bArmature *armature, const char *name)
{
  LISTBASE_FOREACH (EditBone *, eBone, armature->edbo) {
    if (STREQ(name, eBone->name)) {
      return eBone;
    }
  }
 
  return nullptr;
}
int bc_set_layer(int bitfield, int layer)
{
  return bc_set_layer(bitfield, layer, true); /* enable */
}
 
int bc_set_layer(int bitfield, int layer, bool enable)
{
  int bit = 1u << layer;
 
  if (enable) {
    bitfield |= bit;
  }
  else {
    bitfield &= ~bit;
  }
 
  return bitfield;
}
 
BoneExtensionMap &BoneExtensionManager::getExtensionMap(bArmature *armature)
{
  std::string key = armature->id.name;
  BoneExtensionMap *result = extended_bone_maps[key];
  if (result == nullptr) {
    result = new BoneExtensionMap();
    extended_bone_maps[key] = result;
  }
  return *result;
}
 
BoneExtensionManager::~BoneExtensionManager()
{
  std::map<std::string, BoneExtensionMap *>::iterator map_it;
  for (map_it = extended_bone_maps.begin(); map_it != extended_bone_maps.end(); ++map_it) {
    BoneExtensionMap *extended_bones = map_it->second;
    for (auto &extended_bone : *extended_bones) {
      delete extended_bone.second;
    }
    extended_bones->clear();
    delete extended_bones;
  }
}
 
BoneExtended::BoneExtended(EditBone *aBone)
{
  this->set_name(aBone->name);
  this->chain_length = 0;
  this->is_leaf = false;
  this->tail[0] = 0.0f;
  this->tail[1] = 0.5f;
  this->tail[2] = 0.0f;
  this->use_connect = -1;
  this->roll = 0;
 
  this->has_custom_tail = false;
  this->has_custom_roll = false;
}
 
char *BoneExtended::get_name()
{
  return name;
}
 
void BoneExtended::set_name(const char *aName)
{
  STRNCPY(name, aName);
}
 
int BoneExtended::get_chain_length()
{
  return chain_length;
}
 
void BoneExtended::set_chain_length(const int aLength)
{
  chain_length = aLength;
}
 
void BoneExtended::set_leaf_bone(bool state)
{
  is_leaf = state;
}
 
bool BoneExtended::is_leaf_bone()
{
  return is_leaf;
}
 
void BoneExtended::set_roll(float roll)
{
  this->roll = roll;
  this->has_custom_roll = true;
}
 
bool BoneExtended::has_roll()
{
  return this->has_custom_roll;
}
 
float BoneExtended::get_roll()
{
  return this->roll;
}
 
void BoneExtended::set_tail(const float vec[])
{
  this->tail[0] = vec[0];
  this->tail[1] = vec[1];
  this->tail[2] = vec[2];
  this->has_custom_tail = true;
}
 
bool BoneExtended::has_tail()
{
  return this->has_custom_tail;
}
 
float *BoneExtended::get_tail()
{
  return this->tail;
}
 
inline bool isInteger(const std::string &s)
{
  if (s.empty() || (!isdigit(s[0]) && (s[0] != '-') && (s[0] != '+'))) {
    return false;
  }
 
  char *p;
  strtol(s.c_str(), &p, 10);
 
  return (*p == 0);
}
 
void BoneExtended::set_bone_collections(std::vector<std::string> bone_collections)
{
  this->bone_collections = bone_collections;
}
const std::vector<std::string> &BoneExtended::get_bone_collections()
{
  return this->bone_collections;
}
 
void BoneExtended::set_use_connect(int use_connect)
{
  this->use_connect = use_connect;
}
 
int BoneExtended::get_use_connect()
{
  return this->use_connect;
}
 
void bc_set_IDPropertyMatrix(EditBone *ebone, const char *key, float mat[4][4])
{
  IDProperty *idgroup = ebone->prop;
  if (idgroup == nullptr) {
    idgroup = blender::bke::idprop::create_group("RNA_EditBone ID properties").release();
    ebone->prop = idgroup;
  }
 
  IDProperty *data = blender::bke::idprop::create(
                         key, blender::Span(reinterpret_cast<float *>(mat), 16))
                         .release();
 
  IDP_AddToGroup(idgroup, data);
}
 
#if 0
static void bc_set_IDProperty(EditBone *ebone, const char *key, float value)
{
  if (ebone->prop == nullptr) {
    IDPropertyTemplate val = {0};
    ebone->prop = blender::bke::idprop::create_group( "RNA_EditBone ID properties").release();
  }
 
  IDProperty *pgroup = (IDProperty *)ebone->prop;
  IDP_AddToGroup(pgroup, blender::bke::idprop::create(key, value).release());
}
#endif
 
IDProperty *bc_get_IDProperty(Bone *bone, const std::string &key)
{
  return (bone->prop == nullptr) ? nullptr : IDP_GetPropertyFromGroup(bone->prop, key.c_str());
}
 
float bc_get_property(Bone *bone, const std::string &key, float def)
{
  float result = def;
  IDProperty *property = bc_get_IDProperty(bone, key);
  if (property) {
    switch (property->type) {
      case IDP_INT:
        result = float(IDP_Int(property));
        break;
      case IDP_FLOAT:
        result = IDP_Float(property);
        break;
      case IDP_DOUBLE:
        result = float(IDP_Double(property));
        break;
      case IDP_BOOLEAN:
        result = float(IDP_Bool(property));
        break;
      default:
        result = def;
    }
  }
  return result;
}
 
bool bc_get_property_matrix(Bone *bone, const std::string &key, float mat[4][4])
{
  IDProperty *property = bc_get_IDProperty(bone, key);
  if (property && property->type == IDP_ARRAY && property->len == 16) {
    float *array = (float *)IDP_Array(property);
    for (int i = 0; i < 4; i++) {
      for (int j = 0; j < 4; j++) {
        mat[i][j] = array[4 * i + j];
      }
    }
    return true;
  }
  return false;
}
 
void bc_get_property_vector(Bone *bone, const std::string &key, float val[3], const float def[3])
{
  val[0] = bc_get_property(bone, key + "_x", def[0]);
  val[1] = bc_get_property(bone, key + "_y", def[1]);
  val[2] = bc_get_property(bone, key + "_z", def[2]);
}

static bool has_custom_props(Bone *bone, bool enabled, const std::string &key)
{
  if (!enabled) {
    return false;
  }
 
  return (bc_get_IDProperty(bone, key + "_x") || bc_get_IDProperty(bone, key + "_y") ||
          bc_get_IDProperty(bone, key + "_z"));
}
 
void bc_enable_fcurves(AnimData *adt, const char *bone_name)
{
  if (adt == nullptr) {
    return;
  }
 
  char prefix[200];
 
  if (bone_name) {
    char bone_name_esc[sizeof(Bone::name) * 2];
    BLI_str_escape(bone_name_esc, bone_name, sizeof(bone_name_esc));
    SNPRINTF(prefix, "pose.bones[\"%s\"]", bone_name_esc);
  }
 
  for (FCurve *fcu : blender::animrig::legacy::fcurves_for_assigned_action(adt)) {
    if (bone_name) {
      if (STREQLEN(fcu->rna_path, prefix, strlen(prefix))) {
        fcu->flag &= ~FCURVE_DISABLED;
      }
      else {
        fcu->flag |= FCURVE_DISABLED;
      }
    }
    else {
      fcu->flag &= ~FCURVE_DISABLED;
    }
  }
}
 
bool bc_bone_matrix_local_get(Object *ob, Bone *bone, Matrix &mat, bool for_opensim)
{
 
  /* Ok, lets be super cautious and check if the bone exists */
  bPose *pose = ob->pose;
  bPoseChannel *pchan = BKE_pose_channel_find_name(pose, bone->name);
  if (!pchan) {
    return false;
  }
 
  bPoseChannel *parchan = pchan->parent;
 
  bc_enable_fcurves(ob->adt, bone->name);
  float ipar[4][4];
 
  if (bone->parent) {
    invert_m4_m4(ipar, parchan->pose_mat);
    mul_m4_m4m4(mat, ipar, pchan->pose_mat);
  }
  else {
    copy_m4_m4(mat, pchan->pose_mat);
  }
 
  /* OPEN_SIM_COMPATIBILITY
   * AFAIK animation to second life is via BVH, but no
   * reason to not have the collada-animation be correct */
  if (for_opensim) {
    float temp[4][4];
    copy_m4_m4(temp, bone->arm_mat);
    temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
    invert_m4(temp);
 
    mul_m4_m4m4(mat, mat, temp);
 
    if (bone->parent) {
      copy_m4_m4(temp, bone->parent->arm_mat);
      temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
 
      mul_m4_m4m4(mat, temp, mat);
    }
  }
  bc_enable_fcurves(ob->adt, nullptr);
  return true;
}
 
bool bc_is_animated(BCMatrixSampleMap &values)
{
  static float MIN_DISTANCE = 0.00001;
 
  if (values.size() < 2) {
    return false; /* need at least 2 entries to be not flat */
  }
 
  BCMatrixSampleMap::iterator it;
  const BCMatrix *refmat = nullptr;
  for (it = values.begin(); it != values.end(); ++it) {
    const BCMatrix *matrix = it->second;
 
    if (refmat == nullptr) {
      refmat = matrix;
      continue;
    }
 
    if (!matrix->in_range(*refmat, MIN_DISTANCE)) {
      return true;
    }
  }
  return false;
}
 
bool bc_has_animations(Object *ob)
{
  /* Check for object, light and camera transform animations */
  if (blender::animrig::legacy::assigned_action_has_keyframes(ob->adt) ||
      blender::animrig::legacy::assigned_action_has_keyframes(bc_getSceneLightAnimData(ob)) ||
      blender::animrig::legacy::assigned_action_has_keyframes(bc_getSceneCameraAnimData(ob)))
  {
    return true;
  }
 
  /* Check Material Effect parameter animations. */
  for (int a = 0; a < ob->totcol; a++) {
    Material *ma = BKE_object_material_get(ob, a + 1);
    if (!ma) {
      continue;
    }
    if (blender::animrig::legacy::assigned_action_has_keyframes(bc_getSceneMaterialAnimData(ma))) {
      return true;
    }
  }
 
  Key *key = BKE_key_from_object(ob);
  if (key && blender::animrig::legacy::assigned_action_has_keyframes(key->adt)) {
    return true;
  }
 
  return false;
}
 
bool bc_has_animations(Scene *sce, LinkNode *export_set)
{
  LinkNode *node;
  if (export_set) {
    for (node = export_set; node; node = node->next) {
      Object *ob = (Object *)node->link;
 
      if (bc_has_animations(ob)) {
        return true;
      }
    }
  }
  return false;
}
 
void bc_add_global_transform(Matrix &to_mat,
                             const Matrix &from_mat,
                             const BCMatrix &global_transform,
                             const bool invert)
{
  copy_m4_m4(to_mat, from_mat);
  bc_add_global_transform(to_mat, global_transform, invert);
}
 
void bc_add_global_transform(Vector &to_vec,
                             const Vector &from_vec,
                             const BCMatrix &global_transform,
                             const bool invert)
{
  copy_v3_v3(to_vec, from_vec);
  bc_add_global_transform(to_vec, global_transform, invert);
}
 
void bc_add_global_transform(Matrix &to_mat, const BCMatrix &global_transform, const bool invert)
{
  BCMatrix mat(to_mat);
  mat.add_transform(global_transform, invert);
  mat.get_matrix(to_mat);
}
 
void bc_add_global_transform(Vector &to_vec, const BCMatrix &global_transform, const bool invert)
{
  Matrix mat;
  Vector from_vec;
  copy_v3_v3(from_vec, to_vec);
  global_transform.get_matrix(mat, false, 6, invert);
  mul_v3_m4v3(to_vec, mat, from_vec);
}
 
void bc_apply_global_transform(Matrix &to_mat, const BCMatrix &global_transform, const bool invert)
{
  BCMatrix mat(to_mat);
  mat.apply_transform(global_transform, invert);
  mat.get_matrix(to_mat);
}
 
void bc_apply_global_transform(Vector &to_vec, const BCMatrix &global_transform, const bool invert)
{
  Matrix transform;
  global_transform.get_matrix(transform);
  mul_v3_m4v3(to_vec, transform, to_vec);
}
 
void bc_create_restpose_mat(BCExportSettings &export_settings,
                            Bone *bone,
                            float to_mat[4][4],
                            float from_mat[4][4],
                            bool use_local_space)
{
  float loc[3];
  float rot[3];
  float scale[3];
  static const float V0[3] = {0, 0, 0};
 
  if (!has_custom_props(bone, export_settings.get_keep_bind_info(), "restpose_loc") &&
      !has_custom_props(bone, export_settings.get_keep_bind_info(), "restpose_rot") &&
      !has_custom_props(bone, export_settings.get_keep_bind_info(), "restpose_scale"))
  {
    /* No need */
    copy_m4_m4(to_mat, from_mat);
    return;
  }
 
  bc_decompose(from_mat, loc, rot, nullptr, scale);
  loc_eulO_size_to_mat4(to_mat, loc, rot, scale, 6);
 
  if (export_settings.get_keep_bind_info()) {
    bc_get_property_vector(bone, "restpose_loc", loc, loc);
 
    if (use_local_space && bone->parent) {
      Bone *b = bone;
      while (b->parent) {
        b = b->parent;
        float ploc[3];
        bc_get_property_vector(b, "restpose_loc", ploc, V0);
        loc[0] += ploc[0];
        loc[1] += ploc[1];
        loc[2] += ploc[2];
      }
    }
  }
 
  if (export_settings.get_keep_bind_info()) {
    if (bc_get_IDProperty(bone, "restpose_rot_x")) {
      rot[0] = DEG2RADF(bc_get_property(bone, "restpose_rot_x", 0));
    }
    if (bc_get_IDProperty(bone, "restpose_rot_y")) {
      rot[1] = DEG2RADF(bc_get_property(bone, "restpose_rot_y", 0));
    }
    if (bc_get_IDProperty(bone, "restpose_rot_z")) {
      rot[2] = DEG2RADF(bc_get_property(bone, "restpose_rot_z", 0));
    }
  }
 
  if (export_settings.get_keep_bind_info()) {
    bc_get_property_vector(bone, "restpose_scale", scale, scale);
  }
 
  loc_eulO_size_to_mat4(to_mat, loc, rot, scale, 6);
}
 
void bc_sanitize_v3(float v[3], int precision)
{
  for (int i = 0; i < 3; i++) {
    double val = double(v[i]);
    val = double_round(val, precision);
    v[i] = float(val);
  }
}
 
void bc_sanitize_v3(double v[3], int precision)
{
  for (int i = 0; i < 3; i++) {
    v[i] = double_round(v[i], precision);
  }
}
 
void bc_copy_m4_farray(float r[4][4], float *a)
{
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 4; j++) {
      r[i][j] = *a++;
    }
  }
}
 
void bc_copy_farray_m4(float *r, float a[4][4])
{
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 4; j++) {
      *r++ = a[i][j];
    }
  }
}
 
void bc_copy_darray_m4d(double *r, double a[4][4])
{
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 4; j++) {
      *r++ = a[i][j];
    }
  }
}
 
void bc_copy_v44_m4d(std::vector<std::vector<double>> &r, double (&a)[4][4])
{
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 4; j++) {
      r[i][j] = a[i][j];
    }
  }
}
 
void bc_copy_m4d_v44(double (&r)[4][4], std::vector<std::vector<double>> &a)
{
  for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 4; j++) {
      r[i][j] = a[i][j];
    }
  }
}

static std::string bc_get_active_uvlayer_name(Mesh *mesh)
{
  int num_layers = CustomData_number_of_layers(&mesh->corner_data, CD_PROP_FLOAT2);
  if (num_layers) {
    const char *layer_name = bc_CustomData_get_active_layer_name(&mesh->corner_data,
                                                                 CD_PROP_FLOAT2);
    if (layer_name) {
      return std::string(layer_name);
    }
  }
  return "";
}

static std::string bc_get_active_uvlayer_name(Object *ob)
{
  Mesh *mesh = (Mesh *)ob->data;
  return bc_get_active_uvlayer_name(mesh);
}

static std::string bc_get_uvlayer_name(Mesh *mesh, int layer)
{
  int num_layers = CustomData_number_of_layers(&mesh->corner_data, CD_PROP_FLOAT2);
  if (num_layers && layer < num_layers) {
    const char *layer_name = bc_CustomData_get_layer_name(
        &mesh->corner_data, CD_PROP_FLOAT2, layer);
    if (layer_name) {
      return std::string(layer_name);
    }
  }
  return "";
}
 
static bNodeTree *prepare_material_nodetree(Material *ma)
{
  if (ma->nodetree == nullptr) {
    blender::bke::node_tree_add_tree_embedded(
        nullptr, &ma->id, "Shader Nodetree", "ShaderNodeTree");
    ma->use_nodes = true;
  }
  return ma->nodetree;
}
 
static bNode *bc_add_node(
    bContext *C, bNodeTree *ntree, int node_type, int locx, int locy, const std::string &label)
{
  bNode *node = blender::bke::node_add_static_node(C, *ntree, node_type);
  if (node) {
    if (label.length() > 0) {
      STRNCPY(node->label, label.c_str());
    }
    node->location[0] = locx;
    node->location[1] = locy;
    node->flag |= NODE_SELECT;
  }
  return node;
}
 
static bNode *bc_add_node(bContext *C, bNodeTree *ntree, int node_type, int locx, int locy)
{
  return bc_add_node(C, ntree, node_type, locx, locy, "");
}
 
static void bc_node_add_link(
    bNodeTree *ntree, bNode *from_node, int from_index, bNode *to_node, int to_index)
{
  bNodeSocket *from_socket = (bNodeSocket *)BLI_findlink(&from_node->outputs, from_index);
  bNodeSocket *to_socket = (bNodeSocket *)BLI_findlink(&to_node->inputs, to_index);
 
  blender::bke::node_add_link(*ntree, *from_node, *from_socket, *to_node, *to_socket);
}
 
void bc_add_default_shader(bContext *C, Material *ma)
{
  bNodeTree *ntree = prepare_material_nodetree(ma);
  std::map<std::string, bNode *> nmap;
#if 0
  nmap["main"] = bc_add_node(C, ntree, SH_NODE_BSDF_PRINCIPLED, -300, 300);
  nmap["emission"] = bc_add_node(C, ntree, SH_NODE_EMISSION, -300, 500, "emission");
  nmap["add"] = bc_add_node(C, ntree, SH_NODE_ADD_SHADER, 100, 400);
  nmap["transparent"] = bc_add_node(C, ntree, SH_NODE_BSDF_TRANSPARENT, 100, 200);
  nmap["mix"] = bc_add_node(C, ntree, SH_NODE_MIX_SHADER, 400, 300, "transparency");
  nmap["out"] = bc_add_node(C, ntree, SH_NODE_OUTPUT_MATERIAL, 600, 300);
  nmap["out"]->flag &= ~NODE_SELECT;
 
  bc_node_add_link(ntree, nmap["emission"], 0, nmap["add"], 0);
  bc_node_add_link(ntree, nmap["main"], 0, nmap["add"], 1);
  bc_node_add_link(ntree, nmap["add"], 0, nmap["mix"], 1);
  bc_node_add_link(ntree, nmap["transparent"], 0, nmap["mix"], 2);
 
  bc_node_add_link(ntree, nmap["mix"], 0, nmap["out"], 0);
  /* experimental, probably not used. */
  bc_make_group(C, ntree, nmap);
#else
  nmap["main"] = bc_add_node(C, ntree, SH_NODE_BSDF_PRINCIPLED, 0, 300);
  nmap["out"] = bc_add_node(C, ntree, SH_NODE_OUTPUT_MATERIAL, 300, 300);
  bc_node_add_link(ntree, nmap["main"], 0, nmap["out"], 0);
#endif
}
 
COLLADASW::ColorOrTexture bc_get_base_color(Material *ma)
{
  /* for alpha see bc_get_alpha() */
  Color default_color = {ma->r, ma->g, ma->b, 1.0};
  bNode *shader = bc_get_master_shader(ma);
  if (ma->use_nodes && shader) {
    return bc_get_cot_from_shader(shader, "Base Color", default_color, false);
  }
 
  return bc_get_cot(default_color);
}
 
COLLADASW::ColorOrTexture bc_get_emission(Material *ma)
{
  Color default_color = {0, 0, 0, 1}; /* default black */
  bNode *shader = bc_get_master_shader(ma);
  if (!(ma->use_nodes && shader)) {
    return bc_get_cot(default_color);
  }
 
  double emission_strength = 0.0;
  bc_get_float_from_shader(shader, emission_strength, "Emission Strength");
  if (emission_strength == 0.0) {
    return bc_get_cot(default_color);
  }
 
  COLLADASW::ColorOrTexture cot = bc_get_cot_from_shader(shader, "Emission Color", default_color);
 
  /* If using texture, emission strength is not supported. */
  COLLADASW::Color col = cot.getColor();
  double final_color[3] = {col.getRed(), col.getGreen(), col.getBlue()};
  mul_v3db_db(final_color, emission_strength);
 
  /* Collada does not support HDR colors, so clamp to 1 keeping channels proportional. */
  double max_color = fmax(fmax(final_color[0], final_color[1]), final_color[2]);
  if (max_color > 1.0) {
    mul_v3db_db(final_color, 1.0 / max_color);
  }
 
  cot.getColor().set(final_color[0], final_color[1], final_color[2], col.getAlpha());
 
  return cot;
}
 
COLLADASW::ColorOrTexture bc_get_ambient(Material *ma)
{
  Color default_color = {0, 0, 0, 1.0};
  return bc_get_cot(default_color);
}
 
COLLADASW::ColorOrTexture bc_get_specular(Material *ma)
{
  Color default_color = {0, 0, 0, 1.0};
  return bc_get_cot(default_color);
}
 
COLLADASW::ColorOrTexture bc_get_reflective(Material *ma)
{
  Color default_color = {0, 0, 0, 1.0};
  return bc_get_cot(default_color);
}
 
double bc_get_alpha(Material *ma)
{
  double alpha = ma->a; /* fallback if no socket found */
  bNode *master_shader = bc_get_master_shader(ma);
  if (ma->use_nodes && master_shader) {
    bc_get_float_from_shader(master_shader, alpha, "Alpha");
  }
  return alpha;
}
 
double bc_get_ior(Material *ma)
{
  double ior = -1; /* fallback if no socket found */
  bNode *master_shader = bc_get_master_shader(ma);
  if (ma->use_nodes && master_shader) {
    bc_get_float_from_shader(master_shader, ior, "IOR");
  }
  return ior;
}
 
double bc_get_shininess(Material *ma)
{
  double ior = -1; /* fallback if no socket found */
  bNode *master_shader = bc_get_master_shader(ma);
  if (ma->use_nodes && master_shader) {
    bc_get_float_from_shader(master_shader, ior, "Roughness");
  }
  return ior;
}
 
double bc_get_reflectivity(Material *ma)
{
  double reflectivity = ma->spec; /* fallback if no socket found */
  bNode *master_shader = bc_get_master_shader(ma);
  if (ma->use_nodes && master_shader) {
    bc_get_float_from_shader(master_shader, reflectivity, "Metallic");
  }
  return reflectivity;
}
 
bool bc_get_float_from_shader(bNode *shader, double &val, std::string nodeid)
{
  bNodeSocket *socket = blender::bke::node_find_socket(*shader, SOCK_IN, nodeid);
  if (socket) {
    bNodeSocketValueFloat *ref = (bNodeSocketValueFloat *)socket->default_value;
    val = double(ref->value);
    return true;
  }
  return false;
}
 
COLLADASW::ColorOrTexture bc_get_cot_from_shader(bNode *shader,
                                                 std::string nodeid,
                                                 const Color &default_color,
                                                 bool with_alpha)
{
  bNodeSocket *socket = blender::bke::node_find_socket(*shader, SOCK_IN, nodeid);
  if (socket) {
    bNodeSocketValueRGBA *dcol = (bNodeSocketValueRGBA *)socket->default_value;
    float *col = dcol->value;
    return bc_get_cot(col, with_alpha);
  }
 
  return bc_get_cot(default_color, with_alpha);
}
 
bNode *bc_get_master_shader(Material *ma)
{
  bNodeTree *nodetree = ma->nodetree;
  if (nodetree) {
    for (bNode *node : nodetree->all_nodes()) {
      if (node->typeinfo->type_legacy == SH_NODE_BSDF_PRINCIPLED) {
        return node;
      }
    }
  }
  return nullptr;
}
 
COLLADASW::ColorOrTexture bc_get_cot(float r, float g, float b, float a)
{
  COLLADASW::Color color(r, g, b, a);
  COLLADASW::ColorOrTexture cot(color);
  return cot;
}
 
COLLADASW::ColorOrTexture bc_get_cot(const Color col, bool with_alpha)
{
  COLLADASW::Color color(col[0], col[1], col[2], (with_alpha) ? col[3] : 1.0);
  COLLADASW::ColorOrTexture cot(color);
  return cot;
}