utils/box_ops3d.py [325:344]:
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        else:
            inter_areas = non_rot_inter_areas
       
        inter_areas = inter_areas.to(corners1.device)
        ### gIOU = iou - (1 - sum_vols/enclose_vol)
        inter_vols = inter_areas * height
        if return_inter_vols_only:
            return inter_vols

        union_vols = (sum_vols - inter_vols).clamp(min=EPS)
        ious = inter_vols / union_vols
        giou_second_term = - (1 - union_vols / enclosing_vols)
        gious = ious + giou_second_term
        gious *= good_boxes
        if nums_k2 is not None:
            mask = torch.zeros((B, K1, K2), device=height.device, dtype=torch.float32)
            for b in range(B):
                mask[b,:,:nums_k2[b]] = 1
            gious *= mask
        return gious
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utils/box_ops3d.py [435:454]:
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    else:
        inter_areas = non_rot_inter_areas
  
    inter_areas = inter_areas.to(corners1.device)
    ### gIOU = iou - (1 - sum_vols/enclose_vol)
    inter_vols = inter_areas * height
    if return_inter_vols_only:
        return inter_vols

    union_vols = (sum_vols - inter_vols).clamp(min=EPS)
    ious = inter_vols / union_vols
    giou_second_term = - (1 - union_vols / enclosing_vols)
    gious = ious + giou_second_term
    gious *= good_boxes
    if nums_k2 is not None:
        mask = torch.zeros((B, K1, K2), device=height.device, dtype=torch.float32)
        for b in range(B):
            mask[b,:,:nums_k2[b]] = 1
        gious *= mask
    return gious
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