TerrainProvider Methods |
The TerrainProvider type exposes the following members.
Methods| Name | Description | |
|---|---|---|
 | Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetFirstPartials |
Get the partial derivatives of height with respect to the specified longitude and
latitude relative to the provider's Shape.
|
| GetGradient | Get the interpolated gradient of height with respect to the terrain at the specified longitude and latitude relative to the provider's Shape. This method produces a vector representing the gradient of height in the ShapeFixedFrame. Note: The direction for the gradient is defined for use as the outward facing surface normal direction. To obtain the directional derivative for the height (rate of change of height with respect to time), take the negative gradient and dot it with a unit vector along the desired azimuth (change in height with respect to distance), times the speed along that direction in meters/second. The gradient, as defined above, is parallel to the upward facing terrain surface normal, but its magnitude indicates the rate of change in the height at that location. |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetHeight |
Gets the interpolated height of the terrain at the specified longitude and latitude using the
default interpolator for this terrain provider.
|
| GetHeightNativeUnits |
Gets the interpolated height of the terrain at the specified longitude and latitude.
|
| GetHeightRelativeToShape |
Gets the interpolated height of the terrain at the specified longitude and latitude
relative to the provider's Shape.
This method takes into account the heights of any reference surfaces.
|
| GetHessian | Get the interpolated hessian matrix based on the function of height with respect to the specified longitude and latitude relative to the provider's Shape. This method produces a matrix representing the mixed second order partial derivatives of height in the ShapeFixedFrame. Note: The direction for the gradient and hessian is defined for use with the directional derivative on the surface. The gradient is defined to be orthogonal to the terrain surface with its surface projection in the direction of the greatest increase in the height. To obtain the second directional derivative for the height (acceleration of height along a particular azimuth), take the negative of the hessian then pre and post multiply it by the velocity vector along the desired azimuth. Then add the negative gradient dotted with the derivative of the velocity vector along the surface. |
| GetLocalMinimumSampleSpacing |
Gets the smallest distance between the successive height samples of the terrain data, in radians, at the specified coordinates.
If the return value is 0.0, then the minimum sample spacing is unknown.
|
| GetNormal |
Get the normal vector to the terrain surface at the specified location.
|
| GetSecondPartials |
Get the second order (mixed) partial derivatives of height with respect to the specified
longitude and latitude relative to the provider's Shape.
|
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| InGlobalBounds |
Returns if the coordinates are in global bounds which is:
[-π, π] for longitude and
[-π/2, π/2] for latitude.
|
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| PreloadExtent |
Loads the terrain data in a given CartographicExtent into the terrain cache.
This method does not return until the terrain data is fully loaded. All terrain data within the extent is loaded into
memory, even if doing so would exceed the TerrainCacheGroup'sMaximumSize. Furthermore, the loaded terrain data is locked
in memory (meaning it will not be unloaded) until the user calls UnloadExtent(CartographicExtent).
This method is safe to call from any thread.
|
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| UnloadExtent |
Unloads the cached terrain data for a given CartographicExtent.
This method unloads all cached regions where any part of the region falls within
the extent. It does not return until the regions have been unloaded. However,
if a region within the extent is being used in another thread while this method
is executing, the region may be reloaded immediately after this method unloads it.
This method is safe to call from any thread.
|
See Also