48 lines
1.8 KiB
Raku
48 lines
1.8 KiB
Raku
// Filename: nodeTransitions.T
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// Created by: drose (20Mar00)
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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, 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://www.panda3d.org/license.txt .
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//
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// To contact the maintainers of this program write to
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// panda3d@yahoogroups.com .
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//
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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function: get_transition_into
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// Description: This external template function is handy for
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// extracting a transition of a particular type from the
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// set. If the transition exists, it is automatically
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// downcasted to the correct type and stored in the
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// pointer given in the first parameter, and the return
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// value is true. If the transition does not exist, the
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// pointer is filled with NULL and the return value is
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// false.
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////////////////////////////////////////////////////////////////////
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template<class Transition>
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INLINE_GRAPH bool
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get_transition_into(Transition *&ptr, const NodeTransitions &trans,
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TypeHandle transition_type) {
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NodeTransition *nt = trans.get_transition(transition_type);
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if (nt == (NodeTransition *)NULL) {
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ptr = (Transition *)NULL;
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return false;
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}
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DCAST_INTO_R(ptr, nt, false);
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return true;
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}
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template<class Transition>
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INLINE_GRAPH bool
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get_transition_into(Transition *&ptr, const NodeTransitions &trans) {
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return get_transition_into(ptr, trans, Transition::get_class_type());
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}
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