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#include <texturetransform.h>
Inherits Node.
Public Member Functions | |
TextureTransform (const char *name="") | |
virtual | ~TextureTransform () |
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. | |
SFVec2f | center |
SFFloat | rotation |
SFVec2f | scale |
SFVec2f | translation |
Events In | |
EventIn< SFVec2f > | set_center |
EventIn< SFFloat > | set_rotation |
EventIn< SFVec2f > | set_scale |
EventIn< SFVec2f > | set_translation |
Events Out | |
EventOut< SFVec2f > | center_changed |
EventOut< SFFloat > | rotation_changed |
EventOut< SFVec2f > | scale_changed |
EventOut< SFVec2f > | translation_changed |
The TextureTransform node defines a 2D transformation that is applied to texture coordinates (see 6.48, TextureCoordinate). This node affects the way textures coordinates are applied to the geometric surface. The transformation consists of (in order):
These parameters support changes to the size, orientation, and position
of textures on shapes. Note that these operations appear reversed when viewed
on the surface of geometry. For example, a scale value of (2 2) will
scale the texture coordinates and have the net effect of shrinking the texture
size by a factor of 2 (texture coordinates are twice as large and thus cause
the texture to repeat). A translation of (0.5 0.0) translates the
texture coordinates +.5 units along the S-axis and has the net effect of
translating the texture -0.5 along the S-axis on the geometry's surface.
A rotation of /2 of the texture coordinates
results in a -
/2 rotation of the texture on
the geometry.
The center field specifies a translation offset in texture coordinate
space about which the rotation and scale fields are applied.
The scale field specifies a scaling factor in S and T of the texture
coordinates about the center point. scale values shall be
in the range (-,
). The rotation
field specifies a rotation in radians of the texture coordinates about the
center point after the scale has been applied. A positive rotation
value makes the texture coordinates rotate counterclockwise about the centre,
thereby rotating the appearance of the texture itself clockwise. The translation
field specifies a translation of the texture coordinates.
In matrix transformation notation, where Tc is the untransformed texture coordinate, Tc' is the transformed texture coordinate, C (center), T (translation), R (rotation), and S (scale) are the intermediate transformation matrices,
Tc' = -C ื S ื R ื C ื T ื Tc
Note that this transformation order is the reverse of the Transform node transformation order since the texture coordinates, not the texture, are being transformed (i.e., the texture coordinate system).
TextureTransform | ( | const char * | name = "" |
) |
Construct a node with all its fields set to default value, which is equivalent to the code below:
center.setXY(0,0); rotation = 0.0f; scale.setXY(1,1); translation.setXY(0,0);
~TextureTransform | ( | ) | [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. emarks This class has no eventIn. 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 "TextureTransform"
. 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.setXY(0,0);
See Detailed Description for meaning of this field. Default value is set to
rotation = 0.0f;
See Detailed Description for meaning of this field. Default value is set to
scale.setXY(1,1);
See Detailed Description for meaning of this field. Default value is set to
translation.setXY(0,0);
Set event associated to exposedField center
Set event associated to exposedField rotation
Set event associated to exposedField translation
Changed event associated to exposedField center
Changed event associated to exposedField rotation
Changed event associated to exposedField scale
Changed event associated to exposedField translation
Generated on 5 Jan 2007 with
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