Skeleton point with x,y,z values

Technical Support & Q&A
1

Hi guys, i am currently new to programming and orbbec camera. May i ask how am i going to get the x,y,z values by using the orbbec camera and visual studio C++? Thank you in advance.

1 Like
2

Hi, This is possible and not that hard. You can get those points using something as follows…

use the example “SimpleBodyViewer-SFML”

after getting the particular information “body”
do this…

const auto& joints = body.joints();

then

for (const auto& joint : joints)
{
// jointType is one of joints which exists for each joint type
astra::JointType jointType = joint.type();
astra::JointStatus jointStatus = joint.status();

	const auto& depthPos = joint.depth_position();
	const auto& worldPos = joint.world_position();
	
	// orientation is a 3x3 rotation matrix where the column vectors also
        // represent the orthogonal basis vectors for the x, y, and z axes.
        const auto& orientation = joint.orientation();
    
       //printf("Body orientation", orientation.x_axis());
   
      const auto& xAxis = orientation.x_axis(); // same as orientation->m00, m10, m20
      const auto& yAxis = orientation.y_axis(); // same as orientation->m01, m11, m21
      const auto& zAxis = orientation.z_axis(); // same as orientation->m02, m12, m22

        if ((int)jointType == 0) // Head
   {
			cout<<"Positions are : " worldPos.x" , "<<
                                                                " worldPos.y" , "<<
                                                                " worldPos.z" , "<<endl;

   }

}

Hope this helps.

BR,
Prasanna

3

Hi @pkr97 , where do i put the code you provided above.
I do not get what you mean by after getting the particular information “body” then do the code u provided.

Could you provide a screenshot or guide me along. Thank you for the help.

Regards.

4

Hello! Thanks for the help. I’ve manage to print out the values. There are 2 questions in my mind, firstly, the values printed out, is it in mm? and secondly, the values of x,y,z are taking which joints as its reference? Thank you so much!!

5

Nice that you were able to get what you wanted.

I’m not using that now. I assume they are in mm.

The values are probably with respect to camera origin.

BR,
Prasanna