1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
NAME SoSeparator SoSep SO_SEP_ {
group node that saves and restores traversal state
}
INCLUDE nodes/SoSeparator.h
DESC {
This group node performs a push (save) of the traversal state before
traversing its children and a pop (restore) after traversing them.
This isolates the separator's children from the rest of the scene
graph. A separator can include lights, cameras, coordinates, normals,
bindings, and all other properties. Separators are relatively
inexpensive, so they can be used freely within scenes.
\p
The \cSoSeparator\. node provides caching of state during rendering
and bounding box computation. This feature can be enabled by setting
the \vrenderCaching\. and \vboundingBoxCaching\. fields. By default,
these are set to \kAUTO\., which means that Inventor decides whether
to build a cache based on internal heuristics.
\p
Separators can also perform culling during rendering and picking.
Culling skips over traversal of the separator's children if they are
not going to be rendered or picked, based on the comparison of the
separator's bounding box with the current view volume. Culling is
controlled by the \vrenderCulling\. and \vpickCulling\. fields. These
are also set to \kAUTO\. by default; however, render culling can be
expensive (and can interfere with render caching), so the \kAUTO\.
heuristics leave it disabled unless specified otherwise.
}
ENUM CacheEnabled {
OFF "Never build a cache",
ON "Always try to build a cache",
AUTO "Decide whether to cache based on some heuristic"
}
FIELD renderCaching { Whether to cache during rendering traversal. }
FIELD boundingBoxCaching { Whether to cache during bounding box traversal. }
FIELD renderCulling { Whether to cull during rendering traversal. }
FIELD pickCulling { Whether to cull during picking traversal. }
METHOD "" SoSeparator() {
Creates a separator node with default settings.
}
METHOD CreateN SoSeparator(int nChildren) {
Constructor that takes approximate number of children.
}
METHOD "" static void setNumRenderCaches(int howMany) {
By default, each separator node maintains 2 render caches. (This is to
allow two different representations, such as filled and wire-frame, to
both be cached.) The
\+\msetNumRenderCaches()\. method\.
\-\mSoSepSetNumRenderCaches()\. function\.
sets the number of render caches each separator will have. Each render
cache uses memory, so increasing this number may increase the memory
requirements of the application. This method affects only separators
that are created after it is called, not separators that were created
before. Setting the number of caches to 0 turns off render caching
globally from then on.
}
METHOD "" static int getNumRenderCaches() {
Returns the current number of render caches.
}
METHOD "" static SoType getClassTypeId() {
Returns type identifier for this class.
}
ACTION SoGLRenderAction, SoCallbackAction, SoGetBoundingBoxAction,
SoGetMatrixAction, SoHandleEventAction, SoRayPickAction,
SoSearchAction {
Saves the current traversal state, traverses all children, and
restores the previous traversal state.
}
ALSO { SoSelection, SoTransformSeparator }
|
