53 lines
2 KiB
C
53 lines
2 KiB
C
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/**
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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 collideMask.h
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* @author drose
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* @date 2000-07-03
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*/
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#ifndef COLLIDEMASK_H
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#define COLLIDEMASK_H
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#include "pandabase.h"
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#include "bitMask.h"
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// This is the data type of the collision mask: the set of bits that every
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// CollisionNode has, and that any two nodes must have some in common in order
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// to be tested for a mutual intersection.
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// This file used to live in the collide directory, but since it's such a
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// trivial definition that a few other directories (like egg) need without
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// necessarily having to pull in all of collide, it seemed better to move it
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// to putil.
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typedef BitMask32 CollideMask;
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// We need some conventions for initial bits for GeomNodes and CollideNodes.
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// These are primarily advisory, since the application programmer is free to
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// define each bit as he or she chooses, but they also control the initial
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// default values that are assigned to new nodes.
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// By established convention, the lower 20 bits are reserved for
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// CollisionNodes. Each CollisionNode has all these bits set on by default
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// (and no others). You can (and probably should) change this on a per-node
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// basis to specialize CollisionNodes for different purposes.
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static const CollideMask default_collision_node_collide_mask = CollideMask::lower_on(20);
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// The next bit is reserved for generic GeomNodes. Each GeomNode has this bit
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// on by default (and no others). You can, of course, set any mask you want
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// on a particular GeomNode; this is just the default bit if you choose not to
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// do anything.
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static const CollideMask default_geom_node_collide_mask = CollideMask::bit(20);
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// The remaining 11 bits are presently unassigned. No nodes will have these
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// bits on by default.
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#endif
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