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#include <transform.h>
Inherits Node.
Public Member Functions | |
Transform (const char *name="") | |
virtual | ~Transform () |
virtual unsigned int | nbFields () const |
virtual FieldHandle | field (const std::string &n) |
virtual FieldHandle | field (unsigned int i) |
virtual bool | isSetToDefaultValue (unsigned int i) const |
virtual unsigned int | nbEventsIn () const |
virtual EventInHandle | eventIn (const std::string &n) |
virtual EventInHandle | eventIn (unsigned int i) |
virtual unsigned int | nbEventsOut () const |
virtual EventOutHandle | eventOut (const std::string &n) |
virtual EventOutHandle | eventOut (unsigned int i) |
const char * | typeName () const |
virtual Node * | duplicate () const |
virtual Node * | duplicate (std::map< const Node *, Node * > &) const |
Public Attributes | |
Exposed Fields | |
A field that is capable of receiving events via an eventIn to change its value(s), and generating events via an eventOut when its value(s) change. | |
SFVec3f | center |
MFNode | children |
SFRotation | rotation |
SFVec3f | scale |
SFRotation | scaleOrientation |
SFVec3f | translation |
Fields | |
A property or attribute of a node. Each node type has a fixed set of fields. Fields may contain various kinds of data and one or many values. Each field has a default value. | |
SFVec3f | bboxCenter |
SFVec3f | bboxSize |
Events In | |
EventIn< MFNode > | addChildren |
EventIn< MFNode > | removeChildren |
EventIn< SFVec3f > | set_center |
EventIn< MFNode > | set_children |
EventIn< SFRotation > | set_rotation |
EventIn< SFVec3f > | set_scale |
EventIn< SFRotation > | set_scaleOrientation |
EventIn< SFVec3f > | set_translation |
Events Out | |
EventOut< SFVec3f > | center_changed |
EventOut< MFNode > | children_changed |
EventOut< SFRotation > | rotation_changed |
EventOut< SFVec3f > | scale_changed |
EventOut< SFRotation > | scaleOrientation_changed |
EventOut< SFVec3f > | translation_changed |
The Transform node is a grouping node that defines a coordinate system for its children that is relative to the coordinate systems of its ancestors. See 4.4.4, Transformation hierarchy, and 4.4.5, Standard units and coordinate system, for a description of coordinate systems and transformations.
4.6.5, Grouping and children nodes, provides a description of the children, addChildren, and removeChildren fields and eventIns.
The bboxCenter and bboxSize fields specify a bounding box that encloses the children of the Transform node. This is a hint that may be used for optimization purposes. The results are undefined if the specified bounding box is smaller than the actual bounding box of the children at any time. A default bboxSize value, (-1, -1, -1), implies that the bounding box is not specified and, if needed, shall be calculated by the browser. The bounding box shall be large enough at all times to enclose the union of the group's children's bounding boxes; it shall not include any transformations performed by the group itself (i.e., the bounding box is defined in the local coordinate system of the children). The results are undefined if the specified bounding box is smaller than the true bounding box of the group. A description of the bboxCenter and bboxSize fields is provided in 4.6.4, Bounding boxes.
The translation, rotation, scale, scaleOrientation and center fields define a geometric 3D transformation consisting of (in order):
The center field specifies a translation offset from the origin of the local coordinate system (0,0,0). The rotation field specifies a rotation of the coordinate system. The scale field specifies a non-uniform scale of the coordinate system. scale values shall be greater than zero. The scaleOrientation specifies a rotation of the coordinate system before the scale (to specify scales in arbitrary orientations). The scaleOrientation applies only to the scale operation. The translation field specifies a translation to the coordinate system.
Given a 3-dimensional point P and Transform node, P is transformed into point P' in its parent's coordinate system by a series of intermediate transformations. In matrix transformation notation, where C (center), SR (scaleOrientation), T (translation), R (rotation), and S (scale) are the equivalent transformation matrices,
P' = T × C × R × SR × S × -SR × -C × P
The following Transform node:
Transform { center C rotation R scale S scaleOrientation SR translation T children [...] }
is equivalent to the nested sequence of:
Transform { translation T children Transform { translation C children Transform { rotation R children Transform { rotation SR children Transform { scale S children Transform { rotation -SR children Transform { translation -C children [...] }}}}}}}
Transform | ( | const char * | name = "" |
) |
Construct a node with all its fields set to default value, which is equivalent to the code below:
center.setXYZ(0,0,0); rotation.setAxisAndAngle(0,0,1,0); scale.setXYZ(1,1,1); scaleOrientation.setAxisAndAngle(0,0,1,0); translation.setXYZ(0,0,0); bboxCenter.setXYZ(0,0,0); bboxSize.setXYZ(-1,-1,-1);
~Transform | ( | ) | [virtual] |
Virtual destructor, does nothing
unsigned int nbFields | ( | ) | const [inline, virtual] |
Returns the number of fields (exposed or not) for this node type.
Implements Node.
wrl::Node::FieldHandle field | ( | const std::string & | n | ) | [virtual] |
Return a handle on the field named n
of the node or a "unknown" typed handle if there is no such field. Valid names are:
Implements Node.
wrl::Node::FieldHandle field | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th field of the node or a "unknown" typed handle if there is no such node. Here is how i
is related to fields:
Implements Node.
bool isSetToDefaultValue | ( | unsigned int | i | ) | const [virtual] |
Implements Node.
unsigned int nbEventsIn | ( | ) | const [inline, virtual] |
Returns the number of events in for this node type.
Implements Node.
wrl::Node::EventInHandle eventIn | ( | const std::string & | n | ) | [virtual] |
Return a handle on the event in named n
of the node or a "unknown" typed handle if there is no such event. Valid names are:
Implements Node.
wrl::Node::EventInHandle eventIn | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th event in of the node or a "unknown" typed handle if there is no such node. Here is how i
is related to fields:
This function is useful, with nbEventsIn() if you want to traverse all events in of a Node.
Implements Node.
unsigned int nbEventsOut | ( | ) | const [inline, virtual] |
Returns the number of events out for this node type.
Implements Node.
wrl::Node::EventOutHandle eventOut | ( | const std::string & | n | ) | [virtual] |
Return a handle on the event out named n
of the node or a "unknown" typed handle if there is no such event. Valid names are:
Implements Node.
wrl::Node::EventOutHandle eventOut | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th event out of the node or a "unknown" typed handle if there is no such node. Here is how i
is related to fields:
Implements Node.
const char * typeName | ( | ) | const [inline, virtual] |
Returns "Transform"
. Useful for printing.
Implements Node.
wrl::Node * duplicate | ( | ) | const [virtual] |
Returns a deep copy of this node, that is a fully independant node with all children (if any) also copied. This is mainly useful for instanciating protos.
Implements Node.
See Detailed Description for meaning of this field. Default value is set to
center.setXYZ(0,0,0);
See Detailed Description for meaning of this field. Default value is set to MFNode default value
See Detailed Description for meaning of this field. Default value is set to
rotation.setAxisAndAngle(0,0,1,0);
See Detailed Description for meaning of this field. Default value is set to
scale.setXYZ(1,1,1);
See Detailed Description for meaning of this field. Default value is set to
scaleOrientation.setAxisAndAngle(0,0,1,0);
See Detailed Description for meaning of this field. Default value is set to
translation.setXYZ(0,0,0);
See Detailed Description for meaning of this field. Default value is set to
bboxCenter.setXYZ(0,0,0);
See Detailed Description for meaning of this field. Default value is set to
bboxSize.setXYZ(-1,-1,-1);
See Detailed Description for meaning of this event.
See Detailed Description for meaning of this event.
Set event associated to exposedField center
Set event associated to exposedField children
Set event associated to exposedField rotation
Set event associated to exposedField scaleOrientation
Set event associated to exposedField translation
Changed event associated to exposedField center
Changed event associated to exposedField children
Changed event associated to exposedField rotation
Changed event associated to exposedField scale
Changed event associated to exposedField scaleOrientation
Changed event associated to exposedField translation
Generated on 5 Jan 2007 with
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