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camera.I
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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 camera.I
10 * @author drose
11 * @date 2002-02-26
12 */
13
14/**
15 * Sets the active flag on the camera. When the camera is not active, nothing
16 * will be rendered.
17 */
18INLINE void Camera::
19 set_active(bool active) {
20 _active = active;
21}
22
23/**
24 * Returns the current setting of the active flag on the camera.
25 */
26INLINE bool Camera::
27 is_active() const {
28 return _active;
29}
30
31/**
32 * Sets the scene that will be rendered by the camera. This is normally the
33 * root node of a scene graph, typically a node called 'render', although it
34 * could represent the root of any subgraph.
35 *
36 * Note that the use of this method is now deprecated. In the absence of an
37 * explicit scene set on the camera, the camera will render whatever scene it
38 * is parented into. This is the preferred way to specify the scene, since it
39 * is the more intuitive mechanism.
40 */
41INLINE void Camera::
42 set_scene(const NodePath &scene) {
43 _scene = scene;
44}
45
46/**
47 * Returns the scene that will be rendered by the camera. See set_scene().
48 */
49INLINE const NodePath &Camera::
50 get_scene() const {
51 return _scene;
52}
53
54/**
55 * Returns the number of display regions associated with the camera.
56 */
57INLINE size_t Camera::
58 get_num_display_regions() const {
59 return _display_regions.size();
60}
61
62/**
63 * Returns the nth display region associated with the camera.
64 */
65INLINE DisplayRegion *Camera::
66 get_display_region(size_t n) const {
67 nassertr(n < _display_regions.size(), nullptr);
68 return _display_regions[n];
69}
70
71/**
72 * Changes the set of bits that represent the subset of the scene graph the
73 * camera will render.
74 *
75 * During the cull traversal, a node is not visited if none of its draw mask
76 * bits intersect with the camera's camera mask bits. These masks can be used
77 * to selectively hide and show different parts of the scene graph from
78 * different cameras that are otherwise viewing the same scene.
79 */
80INLINE void Camera::
81 set_camera_mask(DrawMask mask) {
82 // You shouldn't attempt to use Panda's reserved "overall" bit as a camera
83 // mask.
84 nassertv((mask & PandaNode::get_overall_bit()).is_zero());
85 _camera_mask = mask;
86}
87
88/**
89 * Returns the set of bits that represent the subset of the scene graph the
90 * camera will render. See set_camera_mask().
91 */
92INLINE DrawMask Camera::
93 get_camera_mask() const {
94 return _camera_mask;
95}
96
97/**
98 * Specifies the point from which the culling operations are performed.
99 * Normally, this is the same as the camera, and that is the default if this
100 * is not specified; but it may sometimes be useful to perform the culling
101 * from some other viewpoint, particularly when you are debugging the culling
102 * itself.
103 */
104INLINE void Camera::
105 set_cull_center(const NodePath &cull_center) {
106 _cull_center = cull_center;
107}
108
109/**
110 * Returns the point from which the culling operations will be performed, if
111 * it was set by set_cull_center(), or the empty NodePath otherwise.
112 */
113INLINE const NodePath &Camera::
114 get_cull_center() const {
115 return _cull_center;
116}
117
118/**
119 * Specifies the bounding volume that should be used to perform culling from
120 * this camera. Normally, this is the bounding volume returned from the
121 * active lens' make_bounds() call, but you may override this to specify a
122 * custom volume if you require. The specified bounding volume will be
123 * understood to be in the coordinate space of the get_cull_center() node.
124 */
125INLINE void Camera::
126 set_cull_bounds(BoundingVolume *cull_bounds) {
127 _cull_bounds = cull_bounds;
128}
129
130/**
131 * Returns the custom cull volume that was set by set_cull_bounds(), if any,
132 * or NULL if no custom cull volume was set.
133 */
134INLINE BoundingVolume *Camera::
135 get_cull_bounds() const {
136 return _cull_bounds;
137}
138
139/**
140 * Specifies the point from which the LOD distances are measured. Normally,
141 * this is the same as the camera, and that is the default if this is not
142 * specified; but it may sometimes be useful to perform the distance test from
143 * some other viewpoint. This may be used, for instance, to reduce LOD
144 * popping when the camera rotates in a small circle about an avatar.
145 */
146INLINE void Camera::
147 set_lod_center(const NodePath &lod_center) {
148 _lod_center = lod_center;
149}
150
151/**
152 * Returns the point from which the LOD distances will be measured, if it was
153 * set by set_lod_center(), or the empty NodePath otherwise.
154 */
155INLINE const NodePath &Camera::
156 get_lod_center() const {
157 return _lod_center;
158}
159
160/**
161 * Sets the initial state which is applied to all nodes in the scene, as if it
162 * were set at the top of the scene graph.
163 */
164INLINE void Camera::
165 set_initial_state(const RenderState *state) {
166 _initial_state = state;
167}
168
169/**
170 * Returns the initial state as set by a previous call to set_initial_state().
171 */
172INLINE CPT(RenderState) Camera::
173get_initial_state() const {
174 return _initial_state;
175}
176
177/**
178 * Sets the tag key which, when encountered as a tag on nodes in the scene
179 * graph, causes this Camera to apply an arbitrary state transition based on
180 * the value of the tag (as specified to set_tag_state()).
181 */
182INLINE void Camera::
183set_tag_state_key(const std::string &tag_state_key) {
184 _tag_state_key = tag_state_key;
185}
186
187/**
188 * Returns the tag key as set by a previous call to set_tag_state_key().
189 */
190INLINE const std::string &Camera::
191 get_tag_state_key() const {
192 return _tag_state_key;
193}
194
195/**
196 * Returns the multiplier for LOD distances.
197 */
198INLINE PN_stdfloat Camera::
199 get_lod_scale() const {
200 return _lod_scale;
201}
202
203/**
204 * Sets the multiplier for LOD distances. This value is multiplied with the
205 * LOD scale set on LodNodes.
206 */
207INLINE void Camera::
208 set_lod_scale(PN_stdfloat value) {
209 _lod_scale = value;
210}
BoundingVolume
This is an abstract class for any volume in any sense which can be said to define the locality of ref...
Definition boundingVolume.h:41
Camera::set_camera_mask
set_camera_mask
Changes the set of bits that represent the subset of the scene graph the camera will render.
Definition camera.h:63
Camera::is_active
is_active
Returns the current setting of the active flag on the camera.
Definition camera.h:50
Camera::get_lod_center
get_lod_center
Returns the point from which the LOD distances will be measured, if it was set by set_lod_center(),...
Definition camera.h:75
Camera::set_lod_center
set_lod_center
Specifies the point from which the LOD distances are measured.
Definition camera.h:75
Camera::set_initial_state
set_initial_state
Sets the initial state which is applied to all nodes in the scene, as if it were set at the top of th...
Definition camera.h:79
Camera::set_cull_center
set_cull_center
Specifies the point from which the culling operations are performed.
Definition camera.h:67
Camera::get_cull_bounds
get_cull_bounds
Returns the custom cull volume that was set by set_cull_bounds(), if any, or NULL if no custom cull v...
Definition camera.h:71
Camera::get_scene
get_scene
Returns the scene that will be rendered by the camera.
Definition camera.h:54
Camera::get_lod_scale
get_lod_scale
Returns the multiplier for LOD distances.
Definition camera.h:87
Camera::get_display_region
get_display_region
Returns the nth display region associated with the camera.
Definition camera.h:58
Camera::get_camera_mask
get_camera_mask
Returns the set of bits that represent the subset of the scene graph the camera will render.
Definition camera.h:63
Camera::set_active
set_active
Sets the active flag on the camera.
Definition camera.h:50
Camera::set_cull_bounds
set_cull_bounds
Specifies the bounding volume that should be used to perform culling from this camera.
Definition camera.h:71
Camera::get_tag_state_key
get_tag_state_key
Returns the tag key as set by a previous call to set_tag_state_key().
Definition camera.h:83
Camera::get_num_display_regions
get_num_display_regions
Returns the number of display regions associated with the camera.
Definition camera.h:58
Camera::get_cull_center
get_cull_center
Returns the point from which the culling operations will be performed, if it was set by set_cull_cent...
Definition camera.h:67
Camera::set_lod_scale
set_lod_scale
Sets the multiplier for LOD distances.
Definition camera.h:87
Camera::set_scene
set_scene
Sets the scene that will be rendered by the camera.
Definition camera.h:54
DisplayRegion
A rectangular subregion within a window for rendering into.
Definition displayRegion.h:57
NodePath
NodePath is the fundamental system for disambiguating instances, and also provides a higher-level int...
Definition nodePath.h:159
RenderState
This represents a unique collection of RenderAttrib objects that correspond to a particular renderabl...
Definition renderState.h:47