SoVRMLGeoElevationGrid Class Reference
[GeoVRML 1.1 Nodes]
Specifies a uniform grid of elevation values within some spatial reference frame.
More...
#include <Inventor/geo/SoVRMLGeoElevationGrid.h>
Public Member Functions | |
| virtual SoType | getTypeId () const |
| SoVRMLGeoElevationGrid () | |
Static Public Member Functions | |
| static SoType | getClassTypeId () |
Public Attributes | |
| SoSFFloat | yScale |
| SoSFVec3f | geoGridOrigin |
| SoMFString | geoSystem |
| SoSFNode | geoOrigin |
Detailed Description
Specifies a uniform grid of elevation values within some spatial reference frame.
The SoVRMLGeoElevationGrid allows to create terrain models for local or large areas (automatically introduces correct degree of earth curvature).
VRML X3D SPECIFICATION
- This section describes the expected behavior of the node in a conforming X3D / VRML97 browser application. In some cases, the application is responsible for implementing portions of the expected behavior. Open Inventor viewer classes and IVF classes implement some of the application behaviors.
This section may reference portions of the X3D specification that are not present in this help file. The complete X3D spec is available at http://www.web3d.org .
The SoVRMLGeoElevationGrid node specifies a uniform grid of elevation values within some spatial reference frame. These are then transparently transformed into a geocentric, curved-earth representation. For example, this would allow a geographer to create a height field where all coordinates are specified in terms of latitude, longitude, and elevation. The fields color, colorPerVertex, texCoord, normal, and normalPerVertex all have the same meaning as for ElevationGrid (see 13.3.4 ElevationGrid). The ccw, solid, and creaseAngle fields are described in 11.2.3 Common geometry fields. The geoOrigin field is used to specify a local coordinate frame for extended precision as described in 25.2.5 Dealing with high-precision coordinates. The geoSystem field is used to define the spatial reference frame and is described in 25.2.3 Specifying a spatial reference frame. The geoGridOrigin field specifies the geographic coordinate for the south-west corner (bottom-left) of the dataset. This value should be specified as described in 25.2.4 Specifying geospatial coordinates. The height array contains (xDimension * zDimension) floating point values that represent elevation above the ellipsoid or the geoid, as appropriate. These values are given in row-major order from west to east, south to north. When the geoSystem is "GD", xSpacing refers to the number of degrees of longitude between adjacent height values and zSpacing refers to the number of degrees of latitude between vertical height values. When the geoSystem is "UTM", xSpacing refers to the number of eastings (meters) between adjacent height values and zSpacing refers to the number of northings (meters) between vertical height values. EXAMPLE If xDimension = n and the grid spans d units horizontally, the xSpacing value should be set to: d / (n-1). The yScale value can be used to produce a vertical exaggeration of the data when it is displayed. By default, this value is 1.0 (no exaggeration). If this value is set greater than 1.0, all heights will appear larger than actual.
FILE FORMAT/DEFAULT
- VRMLGeoElevationGrid {
| color | NULL |
| metadata | NULL |
| normal | NULL |
| texCoord | NULL |
| yScale | 1.0 |
| ccw | TRUE |
| colorPerVertex | TRUE |
| creaseAngle | 0 |
| geoGridOrigin | 0 0 0 |
| geoOrigin | NULL |
| geoSystem | ["GD","WE"] |
| height | [] |
| normalPerVertex | TRUE |
| solid | TRUE |
| xDimension | 0 |
| xSpacing | 1.0 |
| zDimension | 0 |
| zSpacing | 1.0 |
ACTION BEHAVIOR
EVENTS
- Deprecated:
-
Deprecated since Open Inventor 9500
The VRML API is no longer supported. See section http://oivdoc95.vsg3d.com/content/compatibility-notes-4#Deprecation of the Reference Manual. - GC: Earth-fixed Geocentric with respect to the WGS84 ellipsoid.
- GD: Geodetic spatial reference frame.
An optional second string may be used to specify the ellipsoid using one of the ellipsoid codes that are defined in X3D. If no ellipsoid is specified, then "WE" is assumed (the WGS84 ellipsoid). - UTM: Universal Transverse Mercator
One further required argument must be supplied for UTM in order to specify the zone number (1..60). This is given in the form "Z<n>", where "<n>" is the zone number. An optional argument of "S" may be supplied in order to specify that the coordinates are in the southern hemisphere (otherwise, northern hemisphere will be assumed). - Inventor/geo/SoVRMLGeoElevationGrid.h
eventIn
| SoMFFloat | set_height |
| SoSFNode | set_color |
| SoSFNode | set_normal |
| SoSFNode | set_texCoord |
| SoSFNode | set_metadata |
eventOut
| SoSFNode | color_changed |
| SoSFNode | normal_changed |
| SoSFNode | texCoord_changed |
| SoSFNode | metadata_changed |
Constructor & Destructor Documentation
| SoVRMLGeoElevationGrid::SoVRMLGeoElevationGrid | ( | ) |
Constructor.
Member Function Documentation
| static SoType SoVRMLGeoElevationGrid::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoVRMLElevationGrid.
| virtual SoType SoVRMLGeoElevationGrid::getTypeId | ( | ) | const [virtual] |
Returns the type identifier for this specific instance.
Reimplemented from SoVRMLElevationGrid.
Member Data Documentation
Specifies the geographic coordinate for the south-west corner (bottom-left) of the dataset.
An SoVRMLGeoOrigin node specifying the origin of the local coordinate system.
Defines the spatial reference frame.
Valid values are:
The yScale value can be used to produce a vertical exaggeration of the data when it is displayed.
By default, this value is 1.0 (no exaggeration). If this value is set greater than 1.0, all heights will appear larger than actual.
The documentation for this class was generated from the following file: