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Improvement: Local Axis, Child Bone targets, and end-bone offsets #196

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Improvement: Local Axis, Child Bone targets, and end-bone offsets #196

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1ac01dd
Refactor bone reading logic in ModelExporter
XiaoVonline Mar 2, 2026
53a941a
Update ModelExporter.cs
XiaoVonline Mar 9, 2026
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121 changes: 120 additions & 1 deletion Assets/Scripts/Exporters/ModelExporter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -267,22 +267,141 @@ private static Morph[] ReadMorph(List<Renderer> renderers)
private static Bone[] ReadBones(List<Transform> bonelist)
{
List<Bone> pmxbones = new List<Bone>();
HashSet<string> use_local_axis = new HashSet<string>
{
"Ear_01_L", "Ear_02_L", "Ear_03_L", "Ear_01_R", "Ear_02_R", "Ear_03_R",
"ShoulderRoll_L", "Arm_L", "Elbow_L", "ArmRoll_L", "Wrist_L", "ShoulderRoll_R", "Arm_R", "Elbow_R", "ArmRoll_R", "Wrist_R",
"Index_01_L", "Middle_01_L", "Pinky_01_L", "Ring_01_L", "Thumb_01_L", "Index_01_R", "Middle_01_R", "Pinky_01_R", "Ring_01_R", "Thumb_01_R",
"Index_02_L", "Middle_02_L", "Pinky_02_L", "Ring_02_L", "Thumb_02_L", "Index_02_R", "Middle_02_R", "Pinky_02_R", "Ring_02_R", "Thumb_02_R",
"Index_03_L", "Middle_03_L", "Pinky_03_L", "Ring_03_L", "Thumb_03_L", "Index_03_R", "Middle_03_R", "Pinky_03_R", "Ring_03_R", "Thumb_03_R",
"Ankle_L", "Toe_offset_L", "Toe_L", "Ankle_R", "Toe_offset_R", "Toe_R"
};
HashSet<string> endbones = new HashSet<string>
{
"Ear_03_L", "Ear_03_R", "Index_03_L", "Middle_03_L", "Pinky_03_L", "Ring_03_L", "Thumb_03_L", "Index_03_R", "Middle_03_R", "Pinky_03_R", "Ring_03_R", "Thumb_03_R"
};
foreach (var bone in bonelist)
{
Bone pmxbone = new Bone();
pmxbone.Name = pmxbone.NameEn = bone.name;
pmxbone.Position = bone.position;
pmxbone.Position = bone.position;
pmxbone.ParentIndex = bonelist.IndexOf(bone.parent);
pmxbone.TransformLevel = 0;
pmxbone.Visible = true;
pmxbone.Movable = true;
pmxbone.Rotatable = true;
pmxbone.Controllable = true;
if (use_local_axis.Contains(bone.name))
{
pmxbone.UseLocalAxis = true;
pmxbone.LocalAxisVal.AxisX = bone.right * (bone.name == "ShoulderRoll_R" || bone.name == "Arm_R" || bone.name == "Elbow_R" || bone.name == "ArmRoll_R" || bone.name == "Wrist_R" ? 1 : -1);
pmxbone.LocalAxisVal.AxisZ = bone.forward;
}
pmxbone.ChildBoneVal = new Bone.ChildBone()
{
ChildUseId = true,
Index = (bone.childCount > 0 ? bonelist.IndexOf(bone.GetChild(0)) : -1)
};
if (endbones.Contains(bone.name))
{
float boneLength = Vector3.Distance(bone.parent.position, bone.position);
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = bone.up * boneLength;
if (!bonelist.Exists(t => t.name == "UpBody_Ctrl"))
{
if (bone.name == "Thumb_03_L" || bone.name == "Thumb_03_R" || bone.name == "Ear_03_L" || bone.name == "Ear_03_R")
pmxbone.ChildBoneVal.Offset = bone.up * boneLength * 0.5f;
}
}
else if (bone.name == "Toe_offset_L" || bone.name == "Toe_L" || bone.name == "Toe_offset_R" || bone.name == "Toe_R")
{
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = bone.up * 0.06f;
}
else if (bone.name == "Ankle_L" || bone.name == "Ankle_R")
{
pmxbone.ChildBoneVal.ChildUseId = false;
Transform targrtBone = bonelist.Find(t => t.name == (bone.name == "Ankle_L" ? "Toe_L" : "Toe_R"));
if (targrtBone != null)
{
float boneLength = Vector3.Distance(targrtBone.parent.position, targrtBone.position);
pmxbone.ChildBoneVal.Offset = bone.up * boneLength;
}
else
{
pmxbone.ChildBoneVal.Offset = bone.up * 0.03f;
}
}
else if (bone.name == "Sp_Hi_Tail0_B_04" )
{
float boneLength = Vector3.Distance(bone.parent.position, bone.position);
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = bone.forward * boneLength;
}
else if (bone.name == "Sp_Hi_Tail0_B_02")
{
if (!bonelist.Exists(t => t.name == "UpBody_Ctrl"))
{
float boneLength = Vector3.Distance(bone.parent.position, bone.position);
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = bone.forward * boneLength * 0.7f;
}
}
else if (bone.name == "Wrist_L" || bone.name == "Wrist_R")
{
pmxbone.ChildBoneVal.ChildUseId = false;
Transform targrtBone = bonelist.Find(t => t.name == (bone.name == "Wrist_L" ? "ArmRoll_L" : "ArmRoll_R"));
if (targrtBone != null)
{
float boneLength = Vector3.Distance(targrtBone.position, bone.position);
pmxbone.ChildBoneVal.Offset = bone.up * (bone.name == "Wrist_R" ? -boneLength : boneLength);
}
else
{
pmxbone.ChildBoneVal.Offset = bone.up * (bone.name == "Wrist_R" ? -0.05f : 0.05f);
}
}
else if (bone.name == "ArmRoll_L" || bone.name == "ArmRoll_R")
{
Transform targrtBone = bone.parent?.Find(bone.name == "ArmRoll_L" ? "Wrist_L" : "Wrist_R");
if (targrtBone != null)
pmxbone.ChildBoneVal.Index = bonelist.IndexOf(targrtBone);
}
else if (bone.name == "Elbow_L" || bone.name == "Elbow_R")
{
if (!bonelist.Exists(t => t.name == "UpBody_Ctrl"))
{
Transform targrtBone = bonelist.Find(t => t.name == (bone.name == "Elbow_L" ? "Wrist_L" : "Wrist_R"));
if (targrtBone != null)
pmxbone.ChildBoneVal.Index = bonelist.IndexOf(targrtBone);
}
}
else if (bone.name == "ShoulderRoll_L" || bone.name == "ShoulderRoll_R")
{
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = (bonelist[pmxbones[pmxbone.ParentIndex].ChildBoneVal.Index].position - bone.parent.position) * 0.4f;
}
else if (bone.name == "Hip")
{
int targetIndex = bonelist.FindIndex(t => t.name == "UpBody_Ctrl");
if (targetIndex == -1)
targetIndex = bonelist.FindIndex(t => t.name == "Waist");
if (targetIndex != -1)
pmxbone.ChildBoneVal.Index = targetIndex;
}
else if (bone.name == "Waist")
{
int targetIndex = bonelist.FindIndex(t => t.name == "Spine");
if (targetIndex == -1)
targetIndex = bonelist.FindIndex(t => t.name == "Chest");
if (targetIndex != -1)
pmxbone.ChildBoneVal.Index = targetIndex;
}
else if (bone.name == "Position")
{
pmxbone.ChildBoneVal.ChildUseId = false;
pmxbone.ChildBoneVal.Offset = bone.up * (bonelist.Exists(t => t.name == "UpBody_Ctrl") ? 1 : 0.1f);
}
pmxbones.Add(pmxbone);
}
return pmxbones.ToArray();
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