Class used to generate a grid of type GridType containing a narrow-band level set representation of an open prism. The only parts of the level set populated are along both normals of the triangle. Negative background tiles that fit inside the closed dilated triangle are also populated. More...

#include <openvdb/tools/impl/LevelSetDilatedMeshImpl.h>

Inherits ConvexVoxelizer< GridType, OpenTriangularPrismVoxelizer< GridType, InterruptT >, InterruptT >.

Public Member Functions
	OpenTriangularPrismVoxelizer (GridPtr &grid, const bool &threaded=false, InterruptT *interrupter=nullptr)
	Constructor. More...

template<typename ScalarType >
void	operator() (const math::Vec3< ScalarType > &pt1, const math::Vec3< ScalarType > &pt2, const math::Vec3< ScalarType > &pt3, const ScalarType &radius)
	Create an open prism. More...

ValueT	voxelSize () const
	Return the voxel size of the grid. More...

ValueT	halfWidth () const
	Return the half width of the narrow-band level set. More...

Protected Types
using	Vec2T = math::Vec2< ValueT >

Protected Member Functions
void	iterate ()
	The function the derived class calls to create the level set, working in index space other than setting signed distance values. More...

ValueT	signedDistance (const Vec3T &) const
	Computes the signed distance from a point to the convex region in index space. More...

ValueT	tilePointSignedDistance (const Vec3T &p) const
	Computes the signed distance for tiles in index space, considering the center of the tile. This method is optional to override and defaults to `signedDistance`. More...

Static Protected Member Functions
static ValueT	tileCeil (const ValueT &x, const ValueT &step)
	Rounds an input scalar up to the nearest valid ordinate of tile of a specified size. More...

static ValueT	tileCeil (const ValueT &x, const T &step)
	Rounds an input scalar up to the nearest valid ordinate of tile of a specified size. More...

static ValueT	tileFloor (const ValueT &x, const ValueT &step)
	Rounds an input scalar down to the nearest valid ordinate of tile of a specified size. More...

static ValueT	tileFloor (const ValueT &x, const T &step)
	Rounds an input scalar down to the nearest valid ordinate of tile of a specified size. More...

static ValueT	circleBottom (const ValueT &x0, const ValueT &y0, const ValueT &r, const ValueT &x)
	Computes the bottom y-coordinate of a circle at a given x position. More...

static ValueT	circleTop (const ValueT &x0, const ValueT &y0, const ValueT &r, const ValueT &x)
	Computes the top y-coordinate of a circle at a given x position. More...

static ValueT	sphereBottom (const ValueT &x0, const ValueT &y0, const ValueT &z0, const ValueT &r, const ValueT &x, const ValueT &y)
	Computes the bottom z-coordinate of a sphere at a given (x, y) position. More...

static ValueT	sphereTop (const ValueT &x0, const ValueT &y0, const ValueT &z0, const ValueT &r, const ValueT &x, const ValueT &y)
	Computes the top z-coordinate of a sphere at a given (x, y) position. More...

Protected Attributes
std::function< bool(ValueT &, ValueT &, const ValueT &, const ValueT &)>	bottomTop
	Find where a vertical infinite line intersects a convex region dilated by the half width. More...

XYRangeData	mXYData

Friends
class	ConvexVoxelizer< GridType, OpenTriangularPrismVoxelizer< GridType, InterruptT >, InterruptT >

Detailed Description

template<typename GridType, typename InterruptT = util::NullInterrupter>
class openvdb::v12_1::tools::lvlset::OpenTriangularPrismVoxelizer< GridType, InterruptT >

Class used to generate a grid of type GridType containing a narrow-band level set representation of an open prism. The only parts of the level set populated are along both normals of the triangle. Negative background tiles that fit inside the closed dilated triangle are also populated.

Note: GridType::ValueType must be a floating-point scalar.

Member Typedef Documentation

using Vec2T = math::Vec2<ValueT>

protectedinherited

Constructor & Destructor Documentation

OpenTriangularPrismVoxelizer	(	GridPtr &	grid,
		const bool &	threaded = `false`,
		InterruptT *	interrupter = `nullptr`
	)

inline

Constructor.

Parameters

grid	scalar grid to populate the level set in
threaded	center of the sphere in world units
interrupter	pointer to optional interrupter. Use template argument util::NullInterrupter if no interruption is desired.

Note: The voxel size and half width are determined from the input grid, meaning the voxel size and background value need to be set prior to voxelization

Member Function Documentation

static ValueT circleBottom	(	const ValueT &	x0,
		const ValueT &	y0,
		const ValueT &	r,
		const ValueT &	x
	)

inlinestaticprotectedinherited

Computes the bottom y-coordinate of a circle at a given x position.

Parameters

x0	X-coordinate of the circle's center.
y0	Y-coordinate of the circle's center.
r	Radius of the circle.
x	X-coordinate for which to compute the bottom y-coordinate.

Returns: The y-coordinate at the bottom of the circle for the given x position.

static ValueT circleTop	(	const ValueT &	x0,
		const ValueT &	y0,
		const ValueT &	r,
		const ValueT &	x
	)

inlinestaticprotectedinherited

Computes the top y-coordinate of a circle at a given x position.

Parameters

x0	X-coordinate of the circle's center.
y0	Y-coordinate of the circle's center.
r	Radius of the circle.
x	X-coordinate for which to compute the top y-coordinate.

Returns: The y-coordinate at the top of the circle for the given x position.

ValueT halfWidth ( ) const

inlineinherited

Return the half width of the narrow-band level set.

void iterate ( )

inlineprotectedinherited

The function the derived class calls to create the level set, working in index space other than setting signed distance values.

Note: This function handles both parallel and serial iterations. If running in serial mode, it flood fills the tile topology immediately; otherwise, it avoids duplicating nontrivial tree topology over multiple threads. This method also checks for background tiles that are too thin to fit and delegates accordingly.

void operator()	(	const math::Vec3< ScalarType > &	pt1,
		const math::Vec3< ScalarType > &	pt2,
		const math::Vec3< ScalarType > &	pt3,
		const ScalarType &	radius
	)

inline

Create an open prism.

Parameters

pt1	point 1 of the triangle in world units
pt2	point 2 of the triangle in world units
pt3	point 3 of the triangle in world units
radius	radius of the open prism in world units

ValueT signedDistance ( const Vec3T & ) const

inlineprotectedinherited

Computes the signed distance from a point to the convex region in index space.

Parameters

p	The point in 3D space for which to compute the signed distance.

static ValueT sphereBottom	(	const ValueT &	x0,
		const ValueT &	y0,
		const ValueT &	z0,
		const ValueT &	r,
		const ValueT &	x,
		const ValueT &	y
	)

inlinestaticprotectedinherited

Computes the bottom z-coordinate of a sphere at a given (x, y) position.

Parameters

x0	X-coordinate of the sphere's center.
y0	Y-coordinate of the sphere's center.
z0	Z-coordinate of the sphere's center.
r	Radius of the sphere.
x	X-coordinate for which to compute the bottom z-coordinate.
y	Y-coordinate for which to compute the bottom z-coordinate.

Returns: The z-coordinate at the bottom of the sphere for the given (x, y) position.

static ValueT sphereTop	(	const ValueT &	x0,
		const ValueT &	y0,
		const ValueT &	z0,
		const ValueT &	r,
		const ValueT &	x,
		const ValueT &	y
	)

inlinestaticprotectedinherited

Computes the top z-coordinate of a sphere at a given (x, y) position.

Parameters

x0	X-coordinate of the sphere's center.
y0	Y-coordinate of the sphere's center.
z0	Z-coordinate of the sphere's center.
r	Radius of the sphere.
x	X-coordinate for which to compute the top z-coordinate.
y	Y-coordinate for which to compute the top z-coordinate.

Returns: The z-coordinate at the top of the sphere for the given (x, y) position.

static ValueT tileCeil	(	const ValueT &	x,
		const ValueT &	step
	)

inlinestaticprotectedinherited

Rounds an input scalar up to the nearest valid ordinate of tile of a specified size.

Parameters

x	Input value.
step	Tile step size.

Returns: The ceiling of the value based on the tile size.

static ValueT tileCeil	(	const ValueT &	x,
		const T &	step
	)

inlinestaticprotectedinherited

Rounds an input scalar up to the nearest valid ordinate of tile of a specified size.

Template Parameters

T	Any integral type (int, unsigned int, size_t, etc.)

Parameters

x	Input value.
step	Tile step size.

Returns: The ceiling of the value based on the tile size.

static ValueT tileFloor	(	const ValueT &	x,
		const ValueT &	step
	)

inlinestaticprotectedinherited

Rounds an input scalar down to the nearest valid ordinate of tile of a specified size.

Parameters

x	Input value.
step	Tile step size.

Returns: The ceiling of the value based on the tile size.

static ValueT tileFloor	(	const ValueT &	x,
		const T &	step
	)

inlinestaticprotectedinherited

Rounds an input scalar down to the nearest valid ordinate of tile of a specified size.

Template Parameters

T	Any integral type (int, unsigned int, size_t, etc.)

Parameters

x	Input value.
step	Tile step size.

Returns: The ceiling of the value based on the tile size.

ValueT tilePointSignedDistance ( const Vec3T & p ) const

inlineprotectedinherited

Computes the signed distance for tiles in index space, considering the center of the tile. This method is optional to override and defaults to signedDistance.

Parameters

p	The point at the center of the tile in 3D space.

Note: This can be useful for cases that build objects from multiple primitives, e.g. dilated mesh is built by constructing and unioning open prisms and open tube wedges. A tile might not fully fit in an open prism but might fit in the union of a prism and wedge, and so in this case it might make sense to use the sdf for an offset triangle on tiles during the open prism scan.

ValueT voxelSize ( ) const

inlineinherited

Return the voxel size of the grid.

Friends And Related Function Documentation

friend class ConvexVoxelizer< GridType, OpenTriangularPrismVoxelizer< GridType, InterruptT >, InterruptT >

friend

Member Data Documentation

std::function<bool(ValueT&, ValueT&, const ValueT&, const ValueT&)> bottomTop

protectedinherited

Find where a vertical infinite line intersects a convex region dilated by the half width.

Parameters

[out]	zb	Reference to the z ordinate where the bottom intersection occurs.
[out]	zt	Reference to the z ordinate where the top intersection occurs.
[in]	x	The x ordinate of the infinte line.
[in]	y	The y ordinate of the infinte line.

Returns: true if an intersection occurs; otherwise false.

Note: The derived class can override this lambda to implement different behavior for degenerate cases.

XYRangeData mXYData

protectedinherited

Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Friends

Detailed Description

template<typename GridType, typename InterruptT = util::NullInterrupter> class openvdb::v12_1::tools::lvlset::OpenTriangularPrismVoxelizer< GridType, InterruptT >

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation

template<typename GridType, typename InterruptT = util::NullInterrupter>
class openvdb::v12_1::tools::lvlset::OpenTriangularPrismVoxelizer< GridType, InterruptT >