C、C++:
四元数结构体`rm_envelope_balls_list_t`

类成员变量说明

w
C++
```
float rm_quat_t::w
```
x
C++
```
float rm_quat_t::x
```
y
C++
```
float rm_quat_t::y
```
z
C++
```
float rm_quat_t::z
```