// -----------------------------------------
// DumpGltfNode
// -----------------------------------------
GLTF_Node DumpGltfNode(GameObject _go, List <GameObject> _nodes)
{
GLTF_Node result = new GLTF_Node();
// name
result.name = _go.name;
// NOTE: skinned mesh node will use identity matrix
if (_go.GetComponent <SkinnedMeshRenderer>() != null)
{
// translation
result.translation[0] = 0.0f;
result.translation[1] = 0.0f;
result.translation[2] = 0.0f;
// rotation
result.rotation[0] = 0.0f;
result.rotation[1] = 0.0f;
result.rotation[2] = 0.0f;
result.rotation[3] = 1.0f;
// scale
result.scale[0] = 1.0f;
result.scale[1] = 1.0f;
result.scale[2] = 1.0f;
}
else
{
// translation
// NOTE: convert LH to RH
result.translation[0] = _go.transform.localPosition.x;
result.translation[1] = _go.transform.localPosition.y;
result.translation[2] = -_go.transform.localPosition.z;
// rotation
// NOTE: convert LH to RH
result.rotation[0] = -_go.transform.localRotation.x;
result.rotation[1] = -_go.transform.localRotation.y;
result.rotation[2] = _go.transform.localRotation.z;
result.rotation[3] = _go.transform.localRotation.w;
// scale
result.scale[0] = _go.transform.localScale.x;
result.scale[1] = _go.transform.localScale.y;
result.scale[2] = _go.transform.localScale.z;
}
// children
result.children = new List <int>();
foreach (Transform child in _go.transform)
{
int idx = _nodes.IndexOf(child.gameObject);
if (idx != -1)
{
result.children.Add(idx);
}
}
return(result);
}
// -----------------------------------------
// DumpModel
// -----------------------------------------
void DumpModel(GameObject _prefab, GLTF _gltf, BufferInfo _bufInfo)
{
// get nodes
List <GameObject> nodes = new List <GameObject>();
RecurseNode(_prefab, _go => {
nodes.Add(_go);
return(true);
});
string assetPath = AssetDatabase.GetAssetPath(_prefab);
var meshes = AssetDatabase.LoadAllAssetsAtPath(assetPath).OfType <Mesh>().ToList();
// get meshes
// List<Mesh> meshes = new List<Mesh>();
// RecurseNode(_prefab, _go => {
// MeshFilter meshFilter = _go.GetComponent<MeshFilter>();
// if (meshFilter && meshes.IndexOf(meshFilter.sharedMesh) == -1 ) {
// meshes.Add(meshFilter.sharedMesh);
// }
// return true;
// });
// dump nodes
foreach (GameObject go in nodes)
{
GLTF_Node gltfNode = DumpGltfNode(go, nodes);
MeshFilter meshFilter = go.GetComponent <MeshFilter>();
if (meshFilter != null)
{
gltfNode.mesh = meshes.IndexOf(meshFilter.sharedMesh);
}
_gltf.nodes.Add(gltfNode);
}
// dump meshes
int accOffset = 0;
foreach (Mesh mesh in meshes)
{
// dump mesh
accOffset = _bufInfo.GetAccessorCount();
DumpMesh(mesh, _gltf, _bufInfo, accOffset);
}
}
// -----------------------------------------
// DumpSkinningModel
// -----------------------------------------
void DumpSkinningModel(GameObject _prefab, GLTF _gltf, BufferInfo _bufInfo)
{
// get joints
List <GameObject> joints = new List <GameObject>();
Utils.RecurseNode(_prefab, _go => {
// this is not a joint
if (_go.GetComponent <SkinnedMeshRenderer>() != null)
{
return(false);
}
joints.Add(_go);
return(true);
});
// get nodes
List <GameObject> nodes = new List <GameObject>();
Utils.RecurseNode(_prefab, _go => {
// this is a joint, skip it.
if (_go.GetComponents <Component>().Length == 1)
{
return(false);
}
nodes.Add(_go);
return(true);
});
// get skins & meshes
List <Mesh> meshes = new List <Mesh>();
List <SkinnedMeshRenderer> smrList = new List <SkinnedMeshRenderer>();
Utils.RecurseNode(_prefab, _go => {
SkinnedMeshRenderer smr = _go.GetComponent <SkinnedMeshRenderer>();
if (smr != null)
{
meshes.Add(smr.sharedMesh);
smrList.Add(smr);
}
return(true);
});
// dump nodes
foreach (GameObject go in nodes)
{
GLTF_Node gltfNode = DumpGltfNode(go, nodes);
SkinnedMeshRenderer smr = go.GetComponent <SkinnedMeshRenderer>();
if (smr != null)
{
gltfNode.mesh = meshes.IndexOf(smr.sharedMesh);
gltfNode.skin = smrList.IndexOf(smr);
}
_gltf.nodes.Add(gltfNode);
}
// dump joints
foreach (GameObject go in joints)
{
GLTF_Node gltfNode = DumpGltfNode(go, joints);
_gltf.joints.Add(gltfNode);
}
// dump meshes & skin
int accOffset = 0;
foreach (SkinnedMeshRenderer smr in smrList)
{
// dump mesh
accOffset = _bufInfo.GetAccessorCount();
DumpMesh(smr.sharedMesh, _gltf, _bufInfo, accOffset);
// dump skin
int accBindposesIdx = _bufInfo.GetAccessorCount() - 1;
GameObject rootBone = Utils.GetRootBone(smr, _prefab).gameObject;
GLTF_Skin gltfSkin = DumpGtlfSkin(smr, joints, rootBone, accBindposesIdx);
if (gltfSkin != null)
{
_gltf.skins.Add(gltfSkin);
}
}
}
