mod_shape_basic::t_shape_cylinder Type Reference

Cylinder shape (3D only)

Inheritance diagram for mod_shape_basic::t_shape_cylinder:

Public Member Functions
procedure	initialize (shape)
	Initialize the shape.
procedure	copy (shape, copy)
	Copy the shape.
procedure	is_inside (shape, point)
	Check if a point lies inside the shape.
procedure	get_samples_inside (shape, i, j, k, n, n_samples, samples)
	Check if a given number of point lies in a shape.
procedure	get_distance (shape, point, distance, direction)
	Compute the distance and the direction from a point to the shape.
procedure	ray_trace (shape, ray, has_normal, intersection_list)
	Compute the intersection between the cylinder and a ray.
Public Member Functions inherited from type_shape::t_shape
procedure(abs_initialize_shape), deferred	initialize (shape)
	Initialize the shape.
procedure(abs_copy_shape), deferred	copy (shape, copy)
	Copy the shape.
procedure(abs_shape_is_inside), deferred	is_inside (shape, point)
	Check if a point lies inside the shape.
procedure(abs_shape_get_samples_inside), deferred	get_samples_inside (shape, i, j, k, n, n_samples, samples)
	Check if a given number of point lies in a shape.
procedure(abs_shape_get_distance), deferred	get_distance (shape, point, distance, direction)
	Compute the distance and the direction from a point to the shape.
procedure(abs_shape_ray_trace), deferred	ray_trace (shape, ray, has_normal, intersection_list)
	Compute the intersection between the shape and a ray.

Public Attributes
double precision, dimension(3)	center = 0d0
	Origin of the cylinder.
double precision, dimension(3)	axis = 0d0
	Axis of the cylinder.
double precision	radius = 0d0
	Radius of the cylinder.
Public Attributes inherited from type_shape::t_shape
integer	dimension = 2
	Dimension of the shape.
type(t_cg_transformation)	transformation
	Transformation matrix.
logical	is_reversed = .false.
	Swap interior/exterior sides of the shape.

Member Function/Subroutine Documentation

copy()

procedure mod_shape_basic::t_shape_cylinder::copy	(	class(t_shape_cylinder), intent(in)	shape,
		class(t_shape), allocatable	copy )

Parameters

[in]	shape	cylinder shape
[out]	copy	copied cylinder

get_distance()

procedure mod_shape_basic::t_shape_cylinder::get_distance	(	class(t_shape_cylinder), intent(in)	shape,
		double precision, dimension(3), intent(in)	point,
		double precision, intent(out)	distance,
		double precision, dimension(3), intent(out)	direction )

If the point lies inside the cylinder, the distance is negative and the direction points to the closest point on the cylinder. If the point lies outiside the cylinder, the distance is positive and the direction points in the opposite direction to the closest point on the cylinder.

Parameters

[in]	shape	cylinder shape
[in]	point	any point
[out]	distance	signed closest distance from the point to the cylinder
[out]	direction	signed direction from the point to the closest point on the cylinder

get_samples_inside()

procedure mod_shape_basic::t_shape_cylinder::get_samples_inside	(	class(t_shape_cylinder), intent(inout)	shape,
		integer, intent(in)	i,
		integer, intent(in)	j,
		integer, intent(in)	k,
		integer, intent(in)	n,
		integer, intent(in)	n_samples,
		integer, dimension(:,:,:), intent(inout)	samples )

Sample a cell of coordinates (i,j,k) with (2*n_samples+1)^d samples, where d denotes the dimension of the cell. Return a integer array samples containing the value n where the sample is inside the shape.

n_samples is called the sampling level and can take its value in range [0,∞].

Example of sampling for various sampling level:

   !!    n_samples = 0   n_samples = 1   n_samples = 2
   !!      ┏━━━━━━━┓       ×━━━×━━━×       ×━×━×━×━×
   !!      ┃       ┃       ┃       ┃       × × × × ×
   !!      ┃   ×   ┃       ×   ×   ×       × × × × ×    ...
   !!      ┃       ┃       ┃       ┃       × × × × ×
   !!      ┗━━━━━━━┛       ×━━━×━━━×       ×━×━×━×━×
   !! 

Parameters

[in,out]	shape	cylinder shape
[in]	i,j,k	coordinates of the cell
[in]	n	value to put where the sample is inside the cylinder
[in]	n_samples	sampling level (see description)
[in,out]	samples	array of the (2*n_samples+1)^d samples

initialize()

procedure mod_shape_basic::t_shape_cylinder::initialize

(

class(t_shape_cylinder), intent(inout)

shape

)

Parameters

[in,out]

shape

cylinder shape

is_inside()

procedure mod_shape_basic::t_shape_cylinder::is_inside	(	class(t_shape_cylinder), intent(in)	shape,
		double precision, dimension(3), intent(in)	point )

Parameters

[in]	shape	cylinder shape
[in]	point	any point

ray_trace()

procedure mod_shape_basic::t_shape_cylinder::ray_trace	(	class(t_shape_cylinder), intent(in)	shape,
		type(t_ray), intent(in)	ray,
		logical, intent(in)	has_normal,
		type(t_intersection_list), intent(inout)	intersection_list )

Parameters

[in]	shape	cylinder shape
[in]	ray	ray to intersect the cylinder
[in]	has_normal	list of intersections between the ray and the cylinder
[in,out]	intersection_list	list of intersections between the ray and the cylinder

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The documentation for this type was generated from the following file:

• src/lib/geometry/computational_geometry/shape/basic_shapes.f90