utils/box_util.py [599:618]:
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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_util.py [695:714]:
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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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