Json::Value FileSaver::StoreFrame(KeyFrame* frame, const std::string& dir,
bool single)
{
Json::Value value;
value["id"] = frame->GetID();
value["time"] = frame->GetTime();
value["tween"] = frame->HasClassicTween();
value["lerp"] = libanim::FileSaver::StoreLerps(frame->GetLerps());
for (size_t i = 0, n = frame->Size(); i < n; ++i)
value["actor"][i] = StoreActor(frame->GetSprite(i), dir, single);
value["skeleton"] = StoreSkeleton(frame->GetSkeletonData());
return value;
}
void StdMeshSkeletonLoader::LoadSkeletonXml(const char* groupname, const char* filename, const char *sourcefile, size_t size)
{
if (sourcefile == NULL)
{
throw Ogre::InsufficientData(FormatString("Failed to load '%s/%s'", groupname, filename).getData());
}
std::shared_ptr<StdMeshLoader::StdMeshXML> skeleton(new StdMeshLoader::StdMeshXML(filename, sourcefile));
TiXmlElement* skeleton_elem = skeleton->RequireFirstChild(NULL, "skeleton");
TiXmlElement* bones_elem = skeleton->RequireFirstChild(skeleton_elem, "bones");
// Read bones. Don't insert into Master bone table yet, as the master bone
// table is sorted hierarchically, and we will read the hierarchy only
// afterwards.
std::vector<StdMeshBone*> bones;
for (TiXmlElement* bone_elem = bones_elem->FirstChildElement("bone"); bone_elem != NULL; bone_elem = bone_elem->NextSiblingElement("bone"))
{
StdMeshBone* bone = new StdMeshBone;
bones.push_back(bone);
bone->ID = skeleton->RequireIntAttribute(bone_elem, "id");
bone->Name = skeleton->RequireStrAttribute(bone_elem, "name");
// TODO: Make sure ID and name are unique
bone->Parent = NULL;
// Index of bone will be set when building Master Bone Table later
TiXmlElement* position_elem = skeleton->RequireFirstChild(bone_elem, "position");
TiXmlElement* rotation_elem = skeleton->RequireFirstChild(bone_elem, "rotation");
TiXmlElement* axis_elem = skeleton->RequireFirstChild(rotation_elem, "axis");
StdMeshVector d, r;
d.x = skeleton->RequireFloatAttribute(position_elem, "x");
d.y = skeleton->RequireFloatAttribute(position_elem, "y");
d.z = skeleton->RequireFloatAttribute(position_elem, "z");
float angle = skeleton->RequireFloatAttribute(rotation_elem, "angle");
r.x = skeleton->RequireFloatAttribute(axis_elem, "x");
r.y = skeleton->RequireFloatAttribute(axis_elem, "y");
r.z = skeleton->RequireFloatAttribute(axis_elem, "z");
bone->Transformation.scale = StdMeshVector::UnitScale();
bone->Transformation.rotate = StdMeshQuaternion::AngleAxis(angle, r);
bone->Transformation.translate = d;
// We need this later for applying animations, and attaching meshes, therefore cache it here
bone->InverseTransformation = StdMeshTransformation::Inverse(bone->Transformation);
}
// Bone hierarchy
TiXmlElement* bonehierarchy_elem = skeleton->RequireFirstChild(skeleton_elem, "bonehierarchy");
for (TiXmlElement* boneparent_elem = bonehierarchy_elem->FirstChildElement("boneparent"); boneparent_elem != NULL; boneparent_elem = boneparent_elem->NextSiblingElement("boneparent"))
{
const char* child_name = skeleton->RequireStrAttribute(boneparent_elem, "bone");
const char* parent_name = skeleton->RequireStrAttribute(boneparent_elem, "parent");
// Lookup the two bones
StdMeshBone* child = NULL;
StdMeshBone* parent = NULL;
for (unsigned int i = 0; i < bones.size() && (!child || !parent); ++i)
{
if (!child && bones[i]->Name == child_name)
child = bones[i];
if (!parent && bones[i]->Name == parent_name)
parent = bones[i];
}
if (!child) skeleton->Error(FormatString("There is no such bone with name '%s'", child_name), boneparent_elem);
if (!parent) skeleton->Error(FormatString("There is no such bone with name '%s'", parent_name), boneparent_elem);
child->Parent = parent;
parent->Children.push_back(child);
}
std::shared_ptr<StdMeshSkeleton> Skeleton(new StdMeshSkeleton);
// Fill master bone table in hierarchical order:
for (unsigned int i = 0; i < bones.size(); ++i)
if (bones[i]->Parent == NULL)
Skeleton->AddMasterBone(bones[i]);
// Load Animations
TiXmlElement* animations_elem = skeleton_elem->FirstChildElement("animations");
if (animations_elem)
{
for (TiXmlElement* animation_elem = animations_elem->FirstChildElement("animation"); animation_elem != NULL; animation_elem = animation_elem->NextSiblingElement("animation"))
{
StdCopyStrBuf name(skeleton->RequireStrAttribute(animation_elem, "name"));
if (Skeleton->Animations.find(name) != Skeleton->Animations.end())
skeleton->Error(FormatString("There is already an animation with name '%s'", name.getData()), animation_elem);
StdMeshAnimation& animation = Skeleton->Animations.insert(std::make_pair(name, StdMeshAnimation())).first->second;
animation.Name = name;
animation.Length = skeleton->RequireFloatAttribute(animation_elem, "length");
animation.Tracks.resize(Skeleton->GetNumBones());
animation.OriginSkeleton = &(*Skeleton);
TiXmlElement* tracks_elem = skeleton->RequireFirstChild(animation_elem, "tracks");
for (TiXmlElement* track_elem = tracks_elem->FirstChildElement("track"); track_elem != NULL; track_elem = track_elem->NextSiblingElement("track"))
{
const char* bone_name = skeleton->RequireStrAttribute(track_elem, "bone");
StdMeshBone* bone = NULL;
for (unsigned int i = 0; !bone && i < Skeleton->GetNumBones(); ++i)
if (Skeleton->Bones[i]->Name == bone_name)
bone = Skeleton->Bones[i];
if (!bone) skeleton->Error(FormatString("There is no such bone with name '%s'", bone_name), track_elem);
if (animation.Tracks[bone->Index] != NULL) skeleton->Error(FormatString("There is already a track for bone '%s' in animation '%s'", bone_name, animation.Name.getData()), track_elem);
StdMeshTrack* track = new StdMeshTrack;
animation.Tracks[bone->Index] = track;
TiXmlElement* keyframes_elem = skeleton->RequireFirstChild(track_elem, "keyframes");
for (TiXmlElement* keyframe_elem = keyframes_elem->FirstChildElement("keyframe"); keyframe_elem != NULL; keyframe_elem = keyframe_elem->NextSiblingElement("keyframe"))
{
float time = skeleton->RequireFloatAttribute(keyframe_elem, "time");
StdMeshKeyFrame& frame = track->Frames[time];
TiXmlElement* translate_elem = keyframe_elem->FirstChildElement("translate");
TiXmlElement* rotate_elem = keyframe_elem->FirstChildElement("rotate");
TiXmlElement* scale_elem = keyframe_elem->FirstChildElement("scale");
StdMeshVector d, s, r;
d.x = d.y = d.z = 0.0f;
s = StdMeshVector::UnitScale();
r.x = r.y = 0.0f; r.z = 1.0f;
float angle = 0.0f;
if (translate_elem)
{
d.x = skeleton->RequireFloatAttribute(translate_elem, "x");
d.y = skeleton->RequireFloatAttribute(translate_elem, "y");
d.z = skeleton->RequireFloatAttribute(translate_elem, "z");
}
if (rotate_elem)
{
TiXmlElement* axis_elem = skeleton->RequireFirstChild(rotate_elem, "axis");
angle = skeleton->RequireFloatAttribute(rotate_elem, "angle");
r.x = skeleton->RequireFloatAttribute(axis_elem, "x");
r.y = skeleton->RequireFloatAttribute(axis_elem, "y");
r.z = skeleton->RequireFloatAttribute(axis_elem, "z");
}
if (scale_elem)
{
s.x = skeleton->RequireFloatAttribute(scale_elem, "x");
s.y = skeleton->RequireFloatAttribute(scale_elem, "y");
s.z = skeleton->RequireFloatAttribute(scale_elem, "z");
}
frame.Transformation.scale = s;
frame.Transformation.rotate = StdMeshQuaternion::AngleAxis(angle, r);
frame.Transformation.translate = bone->InverseTransformation.rotate * (bone->InverseTransformation.scale * d);
frame.Transformation = OgreToClonk::TransformTransformation(frame.Transformation);
}
}
}
}
// is there even any xml file that we load from?
// it looks like this could never work: if the mesh has no skeleton, then the code below will fail because of a null pointer...
// Apply parent transformation to each bone transformation. We need to
// do this late since animation keyframe computation needs the bone
// transformations, not bone+parent.
for (unsigned int i = 0; i < Skeleton->GetNumBones(); ++i)
{
// Apply parent transformation
if (Skeleton->Bones[i]->Parent)
Skeleton->Bones[i]->Transformation = Skeleton->Bones[i]->Parent->Transformation * OgreToClonk::TransformTransformation(Skeleton->Bones[i]->Transformation);
else
Skeleton->Bones[i]->Transformation = OgreToClonk::TransformTransformation(Skeleton->Bones[i]->Transformation);
// Update inverse
Skeleton->Bones[i]->InverseTransformation = StdMeshTransformation::Inverse(Skeleton->Bones[i]->Transformation);
}
StoreSkeleton(groupname, filename, Skeleton);
}