Panda3D
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collideMask.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file collideMask.h
10 * @author drose
11 * @date 2000-07-03
12 */
13
14#ifndef COLLIDEMASK_H
15#define COLLIDEMASK_H
16
17#include "pandabase.h"
18
19#include "bitMask.h"
20
21// This is the data type of the collision mask: the set of bits that every
22// CollisionNode has, and that any two nodes must have some in common in order
23// to be tested for a mutual intersection.
24
25// This file used to live in the collide directory, but since it's such a
26// trivial definition that a few other directories (like egg) need without
27// necessarily having to pull in all of collide, it seemed better to move it
28// to putil.
29
31
32// We need some conventions for initial bits for GeomNodes and CollideNodes.
33// These are primarily advisory, since the application programmer is free to
34// define each bit as he or she chooses, but they also control the initial
35// default values that are assigned to new nodes.
36
37// By established convention, the lower 20 bits are reserved for
38// CollisionNodes. Each CollisionNode has all these bits set on by default
39// (and no others). You can (and probably should) change this on a per-node
40// basis to specialize CollisionNodes for different purposes.
41static const CollideMask default_collision_node_collide_mask = CollideMask::lower_on(20);
42
43// The next bit is reserved for generic GeomNodes. Each GeomNode has this bit
44// on by default (and no others). You can, of course, set any mask you want
45// on a particular GeomNode; this is just the default bit if you choose not to
46// do anything.
47static const CollideMask default_geom_node_collide_mask = CollideMask::bit(20);
48
49// The remaining 11 bits are presently unassigned. No nodes will have these
50// bits on by default.
51
52#endif
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
static BitMask< uint32_t, nbits > bit(int index)
Returns a BitMask with only the indicated bit on.
Definition bitMask.I:70
static BitMask< uint32_t, nbits > lower_on(int on_bits)
Returns a BitMask whose lower on_bits bits are on.
Definition bitMask.I:54
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.