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NAME SoText2 SoTxt2 SO_TXT2_ { screen-aligned 2D text shape node }
INCLUDE nodes/SoText2.h
DESC {
This node defines one or more strings of 2D text. The text is always
aligned horizontally with the screen and does not change size with
distance in a perspective projection. The text origin is at (0,0,0)
after applying the current transformation. Rotations and scales have
no effect on the orientation or size of 2D text, just the location.
\p
\cSoText2\. uses the current font to determine the typeface and size.
The text is always drawn with the diffuse color of the current
material; it is not lit, regardless of the lighting model.
Furthermore, 2D text can not be textured, and it ignores the current
drawing style and complexity.
\p
Because 2D text is screen-aligned, it has some unusual
characteristics. For example, the 3D bounding box surrounding a 2D
text string depends on the current camera and the current viewport
size, since changing the field of view or the mapping onto the window
changes the relative size of the text with respect to the rest of the
scene. This has implications for caching as well, since a render cache
in an \cSoSeparator\. that contains an \cSoText2\. node depends on the
current camera.
}
ENUM Justification {
LEFT "Left edges of all strings are aligned",
RIGHT "Right edges of all strings are aligned",
CENTER "Centers of all strings are aligned"
}
FIELD string {
The text string(s) to display. Each string will appear on its own line.
The string(s) can be ascii or UTF-8.
}
FIELD spacing {
Defines the distance (in the negative y direction) between the base
points of successive strings, measured with respect to the current
font height. A value of 1 indicates single spacing, a value of 2
indicates double spacing, and so on.
}
FIELD justification {
Indicates placement and alignment of strings. With \kLEFT\.
justification, the left edge of the first line is at the (transformed)
origin, and all left edges are aligned. \kRIGHT\. justification is
similar. \kCENTER\. justification places the center of the first
string at the (transformed) origin, with the centers of all remaining
strings aligned under it.
}
METHOD "" SoText2() {
Creates a 2D text node with default settings.
}
METHOD "" static SoType getClassTypeId() {
Returns type identifier for this class.
}
ACTION SoGLRenderAction {
Draws text based on the current font, at a location based on the current
transformation.
}
ACTION SoRayPickAction {
Performs a pick on the text. Text will be picked if the picking ray
intersects the bounding box of the strings. The string index and
character position are available from the \cSoTextDetail\..
}
ACTION SoGetBoundingBoxAction {
Computes the bounding box that encloses the text.
}
ALSO { SoFont, SoText3, SoTextDetail }
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