gradient.hpp File Reference

Provides functions for calculating gradients and related operations on arrays. This header file defines functions to compute various gradient operations including gradient norms, gradient angles, and Laplacians for 2D arrays. It supports different gradient filters such as Prewitt, Sobel, and Scharr. More...

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Namespaces
namespace	hmap
namespace	hmap::gpu

Functions
std::vector< float >	hmap::gradient1d (const std::vector< float > &v)
	Compute the gradient of a 1D vector.
Array	hmap::gradient_angle (const Array &array, bool downward=false)
	Compute the polar angle of the gradient of a 2D array.
Array	hmap::gradient_norm (const Array &array, Array *p_dx=nullptr, Array *p_dy=nullptr)
	Compute the gradient norm of a 2D array.
Array	hmap::gradient_norm_prewitt (const Array &array, Array *p_dx=nullptr, Array *p_dy=nullptr)
	Compute the gradient norm of a 2D array using the Prewitt filter.
Array	hmap::gradient_norm_scharr (const Array &array, Array *p_dx=nullptr, Array *p_dy=nullptr)
	Compute the gradient norm of a 2D array using the Scharr filter.
Array	hmap::gradient_norm_sobel (const Array &array, Array *p_dx=nullptr, Array *p_dy=nullptr)
	Compute the gradient norm of a 2D array using the Sobel filter.
Array	hmap::gradient_talus (const Array &array)
	Compute the gradient talus slope of a 2D array.
void	hmap::gradient_talus (const Array &array, Array &talus)
	Compute the gradient talus slope and store it in the provided array.
Array	hmap::gradient_x (const Array &array)
	Compute the gradient in the x-direction of a 2D array.
void	hmap::gradient_x (const Array &array, Array &dx)
	Compute the gradient in the x-direction of a 2D array and store it.
Array	hmap::gradient_y (const Array &array)
	Compute the gradient in the y-direction of a 2D array.
void	hmap::gradient_y (const Array &array, Array &dy)
	Compute the gradient in the y-direction of a 2D array and store it.
Array	hmap::laplacian (const Array &array)
	Compute the Laplacian of a 2D array.
Tensor	hmap::normal_map (const Array &array)
	Generates a normal map from a given 2D array.
Array	hmap::normal_map_to_heightmap (const Tensor &nmap)
	Converts a normal map to a heightmap using direct summation of gradients.
Array	hmap::phase_field (const Array &array, float kw, int width, uint seed, float noise_amp=0.f, int prefilter_ir=-1, float density_factor=1.f, bool rotate90=false, Array *p_gnoise_x=nullptr, Array *p_gnoise_y=nullptr)
	Computes a phase field using spatially varying Gabor noise based on the input heightmap.
Array	hmap::unwrap_phase (const Array &alpha)
	Unwraps a 2D phase array to correct discontinuities in phase data.
Array	hmap::gpu::gradient_norm (const Array &array)
	See hmap::gradient_norm.

Detailed Description

Provides functions for calculating gradients and related operations on arrays. This header file defines functions to compute various gradient operations including gradient norms, gradient angles, and Laplacians for 2D arrays. It supports different gradient filters such as Prewitt, Sobel, and Scharr.

Author

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

Copyright

Copyright (c) 2023 Otto Link