| weight | LookAt 钳制权重。 |
设置 LookAt 钳制权重。
0.0 means the character is unrestrained in motion. 1.0 means the character is clamped (look at becomes impossible). 0.5 means the character is able to move on half of the possible range (180 degrees).
另请参阅：SolveIK、SetLookAtPosition。