boundary.hpp File Reference

Header file for boundary condition functions and utilities. More...

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Namespaces
namespace	hmap

Enumerations
enum	hmap::PeriodicityType : int { hmap::PERIODICITY_X , hmap::PERIODICITY_Y , hmap::PERIODICITY_XY }
	Describes the periodicity mode applied along map axes. More...
enum	hmap::DomainBoundary : int { hmap::BOUNDARY_LEFT , hmap::BOUNDARY_RIGHT , hmap::BOUNDARY_TOP , hmap::BOUNDARY_BOTTOM }
	Describes which domain boundary. More...

Functions
void	hmap::extrapolate_borders (Array &array, int nbuffer=1, float sigma=0.f)
	Performs linear extrapolation of values at the borders of an array (e.g., i = 0, j = 0, etc.) based on the inner values of the array.
void	hmap::falloff (Array &array, float strength=1.f, DistanceFunction dist_fct=DistanceFunction::EUCLIDIAN, const Array *p_noise=nullptr, glm::vec4 bbox={0.f, 1.f, 0.f, 1.f})
	Applies a falloff effect to the input array based on distance.
void	hmap::fill_borders (Array &array)
	Fills the border values of an array (e.g., i = 0, j = 0, etc.) based on the values of the first neighboring cells.
void	hmap::fill_borders (Array &array, int nbuffer)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
Array	hmap::generate_buffered_array (const Array &array, glm::ivec4 buffers, bool zero_padding=false)
	Creates and returns a new array with additional buffer zones at the boundaries, where the buffer values are filled either by symmetry or by zero-padding.
void	hmap::make_periodic (Array &array, int nbuffer, const PeriodicityType &periodicity_type=PeriodicityType::PERIODICITY_XY)
	Adjusts the input array to be periodic in both directions by transitioning smoothly at the boundaries.
Array	hmap::make_periodic_stitching (const Array &array, float overlap)
	Creates a periodic array in both directions using a stitching operation that minimizes errors at the boundaries.
Array	hmap::make_periodic_tiling (const Array &array, float overlap, glm::ivec2 tiling)
	Creates a tiled, periodic array by applying a transition with overlap in both directions.
void	hmap::set_borders (Array &array, glm::vec4 border_values, glm::ivec4 buffer_sizes)
	Enforces specific values at the boundaries of the array.
void	hmap::set_borders (Array &array, float border_values, int buffer_sizes)
	Enforces a uniform value at all boundaries of the array.
void	hmap::sym_borders (Array &array, glm::ivec4 buffer_sizes)
	Fills the values at the domain borders using symmetry over a specified buffer depth.
void	hmap::zeroed_borders (Array &array)
	Fills the border values (e.g., i = 0, j = 0, etc.) of the array with zeros.
void	hmap::zeroed_edges (Array &array, float sigma=1.f, DistanceFunction dist_fct=DistanceFunction::EUCLIDIAN, const Array *p_noise=nullptr, glm::vec4 bbox={0.f, 1.f, 0.f, 1.f})
	Applies a smooth transition to zero at the array borders.

Detailed Description

Header file for boundary condition functions and utilities.

Author

Otto Link (otto..nosp@m.link.nosp@m..bv@g.nosp@m.mail.nosp@m..com)

This header file contains declarations for functions and utilities that manage and enforce boundary conditions in heightmap arrays. The functions include methods for filling, extrapolating, and smoothing values at the boundaries, as well as making arrays periodic and handling symmetry.

Copyright

Copyright (c) 2023 Otto Link