Internal class. More...
#include <Inventor/nodes/SoText2.h>
Public Types | |
| enum | Justification { LEFT = 0x01, RIGHT = 0x02, CENTER = 0x03 } |
| Justification types. More... | |
Public Member Functions | |
| SoText2 () | |
| Creates a 2D text node with default settings. | |
| virtual void | GLRender (SoGLRenderAction *action) |
| Implements rendering by rendering each primitive generated by subclass. | |
| virtual void | rayPick (SoRayPickAction *action) |
| Implements picking along a ray by intersecting the ray with each primitive generated by subclass. | |
Static Public Member Functions | |
| static void | initClass () |
| Initializes base node class. | |
Public Attributes | |
Fields | |
| SoMFString | string |
| The text string(s) to display. | |
| SoSFFloat | spacing |
| Defines the distance (in the negative y direction) between the base points of successive strings, measured with respect to the current font height. | |
| SoSFEnum | justification |
| Indicates placement and alignment of strings. | |
Protected Member Functions | |
| virtual void | generatePrimitives (SoAction *action) |
| This method is a no-op for SoText2, since there are no primitives it can generate. | |
| virtual void | computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er) |
| Computes bounding box of text. | |
| virtual | ~SoText2 () |
Detailed Description
Screen-aligned 2D text shape node.
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.
SoText2 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.
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 SoSeparator that contains an SoText2 node depends on the current camera.
- File Format/Default
Text2 { string "" spacing 1 justification LEFT }
- Action Behavior
- SoGLRenderAction
Draws text based on the current font, at a location based on the current transformation.
- 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 SoTextDetail.
- SoGetBoundingBoxAction
Computes the bounding box that encloses the text.
- See Also
Member Enumeration Documentation
Constructor & Destructor Documentation
| SoText2::SoText2 | ( | ) |
| virtual SoText2::~SoText2 | ( | ) | [protected, virtual] |
Member Function Documentation
| virtual void SoText2::computeBBox | ( | SoAction * | action, |
| SbBox3f & | box, | ||
| SbVec3f & | center | ||
| ) | [protected, virtual] |
Implements SoShape.
| virtual void SoText2::generatePrimitives | ( | SoAction * | action | ) | [protected, virtual] |
Implements SoShape.
| virtual void SoText2::GLRender | ( | SoGLRenderAction * | action | ) | [virtual] |
May be overridden in subclass.
Reimplemented from SoShape.
| static void SoText2::initClass | ( | ) | [static] |
Reimplemented from SoShape.
| virtual void SoText2::rayPick | ( | SoRayPickAction * | action | ) | [virtual] |
May be overridden in subclass.
Reimplemented from SoShape.
Member Data Documentation
With LEFT justification, the left edge of the first line is at the (transformed) origin, and all left edges are aligned. RIGHT justification is similar. CENTER justification places the center of the first string at the (transformed) origin, with the centers of all remaining strings aligned under it.
The documentation for this class was generated from the following file:
- MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/nodes/SoText2.h
