91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
// Filename: cConstrainTransformInterval.cxx
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// Created by: pratt (29Sep06)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "cConstrainTransformInterval.h"
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#include "transformState.h"
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#include "config_interval.h"
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TypeHandle CConstrainTransformInterval::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: CConstrainTransformInterval::Constructor
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// Access: Published
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// Description: Constructs a constraint interval that will constrain
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// the transform of one node to the transform of another.
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// To clarify, the transform of node will be copied to target.
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//
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// If wrt is true, the node's transform will be
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// transformed into the target node's parent's space
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// before being copied. If wrt is false, the node's
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// local transform will be copied unaltered.
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////////////////////////////////////////////////////////////////////
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CConstrainTransformInterval::
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CConstrainTransformInterval(const string &name, double duration,
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const NodePath &node, const NodePath &target,
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bool wrt) :
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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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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: CConstrainTransformInterval::step
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// Access: Published, Virtual
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// Description: Advances the time on the interval. The time may
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// either increase (the normal case) or decrease
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// (e.g. if the interval is being played by a slider).
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////////////////////////////////////////////////////////////////////
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void CConstrainTransformInterval::
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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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CPT(TransformState) transform;
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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 transform in CConstrainTransformInterval::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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transform = _node.get_transform(_target.get_parent());
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} else {
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transform = _node.get_transform();
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}
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_target.set_transform(transform);
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: CConstrainTransformInterval::output
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// Access: Published, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void CConstrainTransformInterval::
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output(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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