private int Calculate()
{
var boneLimit = boneArray.Length;
if (!Validate())
{
return(boneLimit);
}
#if UNITY_EDITOR
LookatDrawer.Clear(lookatPosition, boneLimit);
#endif
var firstData = lookatData.boneConfig[0];
var firstBone = boneArray[0];
var forwardDirection = firstData.forward.GetDirection(firstBone.transform);
var lookatDirection = lookatPosition - firstBone.transform.position;
#if UNITY_EDITOR
LookatDrawer.Push(firstBone.transform.position,
forwardDirection + firstBone.transform.position,
firstData);
#endif
var i = 0;
for (; i < boneLimit; i++)
{
var data = lookatData.boneConfig[i];
var bone = boneArray[i];
var isFinish = false;
if (lookatData.lerpAxis)
{
LerpAxisPerBone(i, forwardDirection, lookatDirection,
out isFinish);
}
if (lookatData.clampAngle)
{
ClampAnglePerBone(i, forwardDirection, lookatDirection,
out isFinish);
}
if (isFinish)
{
break;
}
if (i == boneLimit - 1)
{
break;
}
//目标传递
IterateTarget(i, firstData, firstBone,
out forwardDirection, out lookatDirection);
}
return(boneLimit);
}
private void IterateTarget(int i, LookatData.BoneConfig firstBoneConfig, Bone firstBone,
out Vector3 forwardDirection, out Vector3 lookatDirection)
{
//每次计算结束后直接赋值,初始位置坐标对应改变
var firstBonePosition = firstBone.transform.position;
var length = Vector3.Distance(lookatPosition, firstBonePosition);
var vtPosition = firstBonePosition +
firstBoneConfig.forward.GetDirection(firstBone.transform) * length;
var nextBone = boneArray[i + 1];
var nextData = lookatData.boneConfig[i + 1];
var nextBonePosition = nextBone.transform.position;
var vtDirection = vtPosition - nextBonePosition;
var finalDirection = lookatPosition - nextBonePosition;
forwardDirection = nextData.forward.GetDirection(nextBone.transform);
lookatDirection = Quaternion.FromToRotation(vtDirection, finalDirection)
* forwardDirection;
#if UNITY_EDITOR
LookatDrawer.Push(nextBonePosition, vtPosition, nextData);
#endif
}
