Algorithm 1 Body angle calculation
Input: A dataset N with skeleton joints in the form $(x,y$) per timestamp
Output: Body orientation angle ${\theta }_{srsl}$
	for$p_i$ in N:
	if shoulder_joint_pair:
	apply_coordinates_transformation$(s{l}_{xy}, s{r}_{xy})$
	${\theta }_{pi}={\tan }^{-1}\left(\frac{x_t}{y_t}\right)\ast \left(\frac{{180}^{°}}{\pi }\right)$
	if $s{r}_x<s{l}_x:$
	${\theta }_{pi}={\theta }_{pi}-90°$
	else:
	${\theta }_{pi}={\theta }_{pi}+90°$
	else:
	${\theta }_{pi}=1$
	correction_level = analyze_head_data_availability($p_i$)
	if camera is Kinect_v2 and correction_level > 80%:
	apply_orientation_correction (${\theta }_{pi})$
	return ${\theta }_{pi}$
	end