Simple2DCell Kernels

CUDA kernels and callers for the Simple2DCell class. More...

Functions
bool	gpu_move_degrees_of_freedom (Dscalar2 *d_points, Dscalar2 *d_disp, int N, gpubox &Box)
	Move degrees of freedom according to a set of displacements, and put them back in the unit cell. More...
bool	gpu_move_degrees_of_freedom (Dscalar2 *d_points, Dscalar2 *d_disp, Dscalar scale, int N, gpubox &Box)
	The same as the above, but scale the displacements by a scalar (i.e., x[i] += scale*disp[i]. More...
bool	gpu_set_integer_array (int *d_array, int value, int N)
	A utility function; set all copmonents of an integer array to value. More...
__global__ void	gpu_move_degrees_of_freedom_kernel (Dscalar2 *d_points, Dscalar2 *d_disp, int N, gpubox Box)
__global__ void	gpu_move_degrees_of_freedom_kernel (Dscalar2 *d_points, Dscalar2 *d_disp, Dscalar scale, int N, gpubox Box)
__global__ void	gpu_set_integer_array_kernel (int *d_array, int value, int N)

Detailed Description

CUDA kernels and callers for the Simple2DCell class.

One might think that a "computeGeometry" function should be here, but this function depends too much on whether the primary degrees of freedom are cells or vertices

Function Documentation

gpu_move_degrees_of_freedom() [1/2]

bool gpu_move_degrees_of_freedom	(	Dscalar2 *	d_points,
		Dscalar2 *	d_disp,
		int	N,
		gpubox &	Box
	)

Move degrees of freedom according to a set of displacements, and put them back in the unit cell.

Parameters

d_points	Dscalar2 array of locations
d_disp	Dscalar2 array of displacements
N	The number of degrees of freedom to move
Box	The gpubox in which the new positions must reside

gpu_move_degrees_of_freedom() [2/2]

bool gpu_move_degrees_of_freedom	(	Dscalar2 *	d_points,
		Dscalar2 *	d_disp,
		Dscalar	scale,
		int	N,
		gpubox &	Box
	)

The same as the above, but scale the displacements by a scalar (i.e., x[i] += scale*disp[i].

Parameters

d_points	Dscalar2 array of locations
d_disp	Dscalar2 array of displacements
N	The number of degrees of freedom to move
Box	The gpubox in which the new positions must reside

gpu_set_integer_array()

bool gpu_set_integer_array	(	int *	d_array,
		int	value,
		int	N
	)

A utility function; set all copmonents of an integer array to value.

Parameters

d_array	int array of values
value	the integer to set the entire array to
N	The number of values in the array to set (d_array[0] tp d_array[N-1])

gpu_move_degrees_of_freedom_kernel() [1/2]

__global__ void gpu_move_degrees_of_freedom_kernel	(	Dscalar2 *	d_points,
		Dscalar2 *	d_disp,
		int	N,
		gpubox	Box
	)

A simple routine that takes in a pointer array of points, an array of displacements, adds the displacements to the points, and puts the points back in the primary unit cell.

gpu_move_degrees_of_freedom_kernel() [2/2]

__global__ void gpu_move_degrees_of_freedom_kernel	(	Dscalar2 *	d_points,
		Dscalar2 *	d_disp,
		Dscalar	scale,
		int	N,
		gpubox	Box
	)

A simple routine that takes in a pointer array of points, an array of displacements, adds the displacements to the points, but with the displacement vector scaled by some amount, and puts the points back in the primary unit cell. This is useful, e.g., when the displacements are a dt times a velocity

gpu_set_integer_array_kernel()

__global__ void gpu_set_integer_array_kernel	(	int *	d_array,
		int	value,
		int	N
	)

every thread just writes in a value