private void AutoDetect(ModelRenderer target)
{
var skinnedMesh = target.transform.GetComponentInChildren <SkinnedMeshRenderer>();
if (skinnedMesh == null)
{
Debug.LogError("Cannot find SkinnedMeshRenderer in " + target.name);
return;
}
target.Hand = skinnedMesh.gameObject;
// set finger bones
SetBone(target, "wrist", 0, 1);
SetBone(target, "thumb", 1, 4);
SetBone(target, "index", 5, 4);
SetBone(target, "middle", 9, 4);
SetBone(target, "ring", 13, 4);
SetBone(target, "pinky", 17, 4);
// check left or right
int leftCount = CountName(target, "l_", "_l", "_left", "left_");
int rightCount = CountName(target, "r_", "_r", "_right", "right_");
if (leftCount == rightCount)
{
Debug.LogErrorFormat("Cannot determine left/right for {0}, use current: {1}",
target.name, target.IsLeft ? "left" : "right");
}
else
{
target.IsLeft = leftCount > rightCount;
}
// set initial rotation
var upDir = target.Nodes[9].position - target.Nodes[0].position;
var indexDir = target.Nodes[5].position - target.Nodes[0].position;
var palmDir = target.IsLeft ? Vector3.Cross(indexDir, upDir) : Vector3.Cross(upDir, indexDir);
var rotation = Quaternion.FromToRotation(upDir, Vector3.up);
var frontDir = rotation * palmDir;
var angle = Vector3.Angle(frontDir, Vector3.forward);
var sign = Mathf.Sign(Vector3.Dot(Vector3.up, Vector3.Cross(frontDir, Vector3.forward)));
rotation = Quaternion.AngleAxis(sign * angle, Vector3.up) * rotation * target.transform.rotation;
var eulerAngles = rotation.eulerAngles;
eulerAngles.x = ParseAngle(eulerAngles.x);
eulerAngles.y = ParseAngle(eulerAngles.y);
eulerAngles.z = ParseAngle(eulerAngles.z);
TransformUtils.SetInspectorRotation(target.transform, eulerAngles);
target.initialRotation = TransformUtils.GetInspectorRotation(target.transform);
}
private void SetBone(ModelRenderer target, string name, int boneIndex, int count)
{
var bones = target.GetComponentsInChildren <Transform>()
.Where(t => t.name.ToLower().Contains(name) && t.GetComponent <SkinnedMeshRenderer>() == null)
.OrderBy(t => t.hierarchyCount)
.ToList();
if (bones.Count < count)
{
Debug.LogErrorFormat("Requires at least {1} bones for {0} finger, found only {2}", name, count, bones.Count);
return;
}
for (int i = bones.Count - count; i < bones.Count; i++, boneIndex++)
{
target.Nodes[boneIndex] = bones[i];
}
}
private int CountName(ModelRenderer target, params string[] names)
{
int maxCount = 0;
foreach (var name in names)
{
int count = target.Hand.name.ToLower().Contains(name) ? 1 : 0;
foreach (var node in target.Nodes)
{
count += node.name.ToLower().Contains(name) ? 1 : 0;
}
if (count > maxCount)
{
maxCount = count;
}
}
return(maxCount);
}
