1.1 --- a/src/xform_node.cc	Sun May 18 19:58:47 2014 +0300
     1.2 +++ b/src/xform_node.cc	Mon May 19 06:42:40 2014 +0300
     1.3 @@ -90,6 +90,18 @@
     1.4  	return parent;
     1.5  }
     1.6  
     1.7 +XFormNode *XFormNode::get_root()
     1.8 +{
     1.9 +	if(!parent) return this;
    1.10 +	return parent->get_root();
    1.11 +}
    1.12 +
    1.13 +const XFormNode *XFormNode::get_root() const
    1.14 +{
    1.15 +	if(!parent) return this;
    1.16 +	return parent->get_root();
    1.17 +}
    1.18 +
    1.19  void XFormNode::add_child(XFormNode *child)
    1.20  {
    1.21  	if(!child || child == this) return;
    1.22 @@ -203,6 +215,37 @@
    1.23  	return anm_get_active_animation_name(anm);
    1.24  }
    1.25  
    1.26 +bool XFormNode::get_timeline_bounds(long *start, long *end)
    1.27 +{
    1.28 +	long node_start = LONG_MAX;
    1.29 +	long node_end = LONG_MIN;
    1.30 +
    1.31 +	for(int i=0; i<3; i++) {
    1.32 +		int nkeys = get_key_count(i);
    1.33 +		if(nkeys > 0) {
    1.34 +			long tmp = get_key_time(i, 0);
    1.35 +			if(tmp < node_start) node_start = tmp;
    1.36 +			tmp = get_key_time(i, nkeys - 1);
    1.37 +			if(tmp > node_end) node_end = tmp;
    1.38 +		}
    1.39 +	}
    1.40 +
    1.41 +	for(size_t i=0; i<children.size(); i++) {
    1.42 +		long cstart, cend;
    1.43 +		if(children[i]->get_timeline_bounds(&cstart, &cend)) {
    1.44 +			if(cstart < node_start) node_start = cstart;
    1.45 +			if(cend > node_end) node_end = cend;
    1.46 +		}
    1.47 +	}
    1.48 +
    1.49 +	if(node_start != LONG_MAX) {
    1.50 +		*start = node_start;
    1.51 +		*end = node_end;
    1.52 +		return true;
    1.53 +	}
    1.54 +	return false;
    1.55 +}
    1.56 +
    1.57  static const int track_type_base[] = {ANM_TRACK_POS_X, ANM_TRACK_ROT_X, ANM_TRACK_SCL_X};
    1.58  static const int track_type_nelem[] = {3, 4, 3};
    1.59