80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file cConstrainPosInterval.cxx
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* @author pratt
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* @date 2006-09-29
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*/
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#include "cConstrainPosInterval.h"
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#include "config_interval.h"
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#include "lvecBase3.h"
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TypeHandle CConstrainPosInterval::_type_handle;
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/**
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* Constructs a constraint interval that will constrain the position of one
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* node to the position of another.
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*
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* If wrt is true, the node's position will be transformed into the target
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* node's parent's space before being copied. If wrt is false, the target
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* node's local position will be copied unaltered.
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*/
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CConstrainPosInterval::
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CConstrainPosInterval(const std::string &name, double duration,
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const NodePath &node, const NodePath &target,
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bool wrt, const LVecBase3 posOffset) :
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CConstraintInterval(name, duration),
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_node(node),
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_target(target),
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_wrt(wrt),
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_posOffset(posOffset)
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{
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}
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/**
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* Advances the time on the interval. The time may either increase (the
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* normal case) or decrease (e.g. if the interval is being played by a
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* slider).
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*/
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void CConstrainPosInterval::
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priv_step(double t) {
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check_started(get_class_type(), "priv_step");
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_state = S_started;
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_curr_t = t;
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if(! _target.is_empty()) {
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if(_wrt) {
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if(! _node.is_same_graph(_target)){
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interval_cat.warning()
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<< "Unable to copy position in CConstrainPosInterval::priv_step;\n"
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<< "node (" << _node.get_name()
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<< ") and target (" << _target.get_name()
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<< ") are not in the same graph.\n";
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return;
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}
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_target.set_pos(_node, _posOffset);
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} else {
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if(_posOffset == LVector3::zero()) {
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_target.set_pos(_node.get_pos());
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} else {
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_target.set_pos(_node.get_pos() + _posOffset);
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}
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}
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}
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}
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/**
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*
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*/
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void CConstrainPosInterval::
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output(std::ostream &out) const {
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out << get_name() << ":";
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out << " dur " << get_duration();
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}
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