1 | initial version |

This compiles:

```
#include <tf/transform_datatypes.h>
tf::Quaternion a, b, c;
c = b * a.inverse();
```

I assume it will do what you're asking for, but you should double-check that.

2 | No.2 Revision |

Try using tf::Quaterion. You need to include the following line in the `manifest.xml`

file of your pacakge:

`<depend package="tf"/>`

This ~~compiles:~~should compile:

```
#include <tf/transform_datatypes.h>
tf::Quaternion a, b, c;
c = b * a.inverse();
```

I assume it will do what you're asking for, but you should double-check that.

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.