Raster Layers

Tools to generate meshes for stacks of raster data. More...

Classes
class	RasterLayers
class	RasterLayerDesc

Functions
void	MeshLayers (Mesh *mesh, const RasterLayers *layers)
	Creates triangle/quadrilateral grids for the given raster-layers. More...
void	MeshLayerBoundaries (Mesh *mesh, const RasterLayers *layers)
	Creates boundary grids for the given raster-layers. More...
void	ExtrudeLayers (Mesh *mesh, RasterLayers *layers, bool allow_for_tets_and_pyras)
	Creates volumes for a given stack of raster-layers and an initial triangulation of the surface. More...
void	ExtrudeLayersAndAddProjector (Mesh *mesh, RasterLayers *layers, bool allow_for_tets_and_pyras)
	Creates volumes for a given stack of raster-layers and an initial triangulation of the surface. It also generates a raster-based refinement-projector for the whole geometry. More...
void	ProjectToLayer (Mesh *mesh, RasterLayers *layers, int layer_index)
	Projects a (surface-)mesh to the specified raster-layer. Only height values in valid regions are adjusted. More...
void	ProjectToTopLayer (Mesh *mesh, RasterLayers *layers)
	Projects a (surface-)mesh to the top-layer of the specified raster-stack. Only height values in valid regions are adjusted. More...
void	SnapToHorizontalRaster (Mesh *mesh, RasterLayers *layers)
	Snaps all vertices of the given (surface) grid horizontally to the closest raster-node. More...

Detailed Description

Tools to generate meshes for stacks of raster data.

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Class Documentation

RasterLayers

class RasterLayers

Stack of 2d raster data.

Public Member Functions
	RasterLayers ()
void	load_from_files (vector< string > filenames, double param)
	Loads raster data from the specified .asc files. Specify the bottom layer first and the surface layer last. More...
void	load_from_files (vector< RasterLayerDesc * > filenames)
	Loads raster data from the specified .asc files. Specify the bottom layer first and the surface layer last. More...
void	invalidate_flat_cells ()
	Marks all cells as invalid that belong to a small lense regarding its horizontal area. More...
void	invalidate_small_lenses (double min_area)
	Marks all cells as invalid which are closer to the next higher valid cell than the given min height. More...
void	remove_small_holes (double max_area, _min_height)
	removes small holes by expanding the layer in those regions to the specified height More...
void	snap_cells_to_higher_layers ()
	sets invalid or flat cells to the value of the corresponding cell in the level above. More...
void	eliminate_invalid_cells ()
void	blur_layers (double alpha, size_t num_iterations)
	Blurs the values in each layer by averaging between neighbored cells on the same layer. More...
void	construct_relative_to_global_height_table (size_t iterations, double alpha)
	Prepares a table for improved height value reconstructions in no-data-regions. More...

Constructor & Destructor Documentation

RasterLayers()

RasterLayers

(

)

Member Function Documentation

blur_layers()

void blur_layers	(	double	alpha,
		size_t	num_iterations
	)

Blurs the values in each layer by averaging between neighbored cells on the same layer.

construct_relative_to_global_height_table()

void construct_relative_to_global_height_table	(	size_t	iterations,
		double	alpha
	)

Prepares a table for improved height value reconstructions in no-data-regions.

eliminate_invalid_cells()

void eliminate_invalid_cells

(

)

invalidate_flat_cells()

void invalidate_flat_cells

(

)

Marks all cells as invalid that belong to a small lense regarding its horizontal area.

invalidate_small_lenses()

void invalidate_small_lenses

(

double

min_area

)

Marks all cells as invalid which are closer to the next higher valid cell than the given min height.

load_from_files() [1/2]

void load_from_files	(	vector< string >	filenames,
		double	param
	)

Loads raster data from the specified .asc files. Specify the bottom layer first and the surface layer last.

load_from_files() [2/2]

void load_from_files

(

vector< RasterLayerDesc * >

filenames

)

Loads raster data from the specified .asc files. Specify the bottom layer first and the surface layer last.

remove_small_holes()

void remove_small_holes	(	double	max_area,
		_min_height
	)

removes small holes by expanding the layer in those regions to the specified height

snap_cells_to_higher_layers()

void snap_cells_to_higher_layers

(

)

sets invalid or flat cells to the value of the corresponding cell in the level above.

RasterLayerDesc

class RasterLayerDesc

Layer Desc for RasterLayers class

Public Member Functions
	RasterLayerDesc (string filename, double minLayerHeight)
string	filename ()
	Returns the filename of the given layer-desc. More...
double	min_height ()
	Returns the minimal height of the given layer-desc. More...

Constructor & Destructor Documentation

RasterLayerDesc()

RasterLayerDesc	(	string	filename,
		double	minLayerHeight
	)

Member Function Documentation

filename()

string filename

(

)

Returns the filename of the given layer-desc.

min_height()

double min_height

(

)

Returns the minimal height of the given layer-desc.

Function Documentation

ExtrudeLayers()

void ExtrudeLayers	(	Mesh *	mesh,
		RasterLayers *	layers,
		bool	allow_for_tets_and_pyras
	)

Creates volumes for a given stack of raster-layers and an initial triangulation of the surface.

ExtrudeLayersAndAddProjector()

void ExtrudeLayersAndAddProjector	(	Mesh *	mesh,
		RasterLayers *	layers,
		bool	allow_for_tets_and_pyras
	)

Creates volumes for a given stack of raster-layers and an initial triangulation of the surface. It also generates a raster-based refinement-projector for the whole geometry.

MeshLayerBoundaries()

void MeshLayerBoundaries	(	Mesh *	mesh,
		const RasterLayers *	layers
	)

Creates boundary grids for the given raster-layers.

MeshLayers()

void MeshLayers	(	Mesh *	mesh,
		const RasterLayers *	layers
	)

Creates triangle/quadrilateral grids for the given raster-layers.

ProjectToLayer()

void ProjectToLayer	(	Mesh *	mesh,
		RasterLayers *	layers,
		int	layer_index
	)

Projects a (surface-)mesh to the specified raster-layer. Only height values in valid regions are adjusted.

ProjectToTopLayer()

void ProjectToTopLayer	(	Mesh *	mesh,
		RasterLayers *	layers
	)

Projects a (surface-)mesh to the top-layer of the specified raster-stack. Only height values in valid regions are adjusted.

SnapToHorizontalRaster()

void SnapToHorizontalRaster	(	Mesh *	mesh,
		RasterLayers *	layers
	)

Snaps all vertices of the given (surface) grid horizontally to the closest raster-node.