Curves

Functions
HAPI_DECL	HAPI_GetCurveInfo (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, HAPI_CurveInfo *info)
	Retrieve any meta-data about the curves, including the curve's type, order, and periodicity. More...
HAPI_DECL	HAPI_GetCurveCounts (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, int *counts_array, int start, int length)
	Retrieve the number of vertices for each curve in the part. More...
HAPI_DECL	HAPI_GetCurveOrders (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, int *orders_array, int start, int length)
	Retrieve the orders for each curve in the part if the curve has varying order. More...
HAPI_DECL	HAPI_GetCurveKnots (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, float *knots_array, int start, int length)
	Retrieve the knots of the curves in this part. More...
HAPI_DECL	HAPI_SetCurveInfo (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, const HAPI_CurveInfo *info)
	Set meta-data for the curve mesh, including the curve type, order, and periodicity. More...
HAPI_DECL	HAPI_SetCurveCounts (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, const int *counts_array, int start, int length)
	Set the number of vertices for each curve in the part. More...
HAPI_DECL	HAPI_SetCurveOrders (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, const int *orders_array, int start, int length)
	Set the orders for each curve in the part if the curve has varying order. More...
HAPI_DECL	HAPI_SetCurveKnots (const HAPI_Session *session, HAPI_NodeId node_id, HAPI_PartId part_id, const float *knots_array, int start, int length)
	Set the knots of the curves in this part. More...

Detailed Description

Functions for working with curves

Function Documentation

HAPI_DECL HAPI_GetCurveCounts	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		int *	counts_array,
		int	start,
		int	length
	)

Retrieve the number of vertices for each curve in the part.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	The part id.
[out]	counts_array	The number of cvs each curve contains
[in]	start	The index of the first curve.
[in]	length	The number of curves' counts to retrieve.

HAPI_DECL HAPI_GetCurveInfo	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		HAPI_CurveInfo *	info
	)

Retrieve any meta-data about the curves, including the curve's type, order, and periodicity.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	The part id.
[out]	info	The curve info represents the meta-data about the curves, including the type, order, and periodicity.

HAPI_DECL HAPI_GetCurveKnots	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		float *	knots_array,
		int	start,
		int	length
	)

Retrieve the knots of the curves in this part.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	The part id.
[out]	knots_array	The knots of each curve will be returned in this array.
[in]	start	The index of the first curve.
[in]	length	The number of curves' knots to retrieve. The length of all the knots on a single curve is the order of that curve plus the number of vertices (see HAPI_GetCurveOrders(), and HAPI_GetCurveCounts()).

HAPI_DECL HAPI_GetCurveOrders	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		int *	orders_array,
		int	start,
		int	length
	)

Retrieve the orders for each curve in the part if the curve has varying order.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	The part id.
[out]	orders_array	The order of each curve will be returned in this array.
[in]	start	The index of the first curve.
[in]	length	The number of curves' orders to retrieve.

HAPI_DECL HAPI_SetCurveCounts	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		const int *	counts_array,
		int	start,
		int	length
	)

Set the number of vertices for each curve in the part.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	Currently unused. Input asset geos are assumed to have only one part.
[in]	counts_array	The number of cvs each curve contains.
[in]	start	The index of the first curve.
[in]	length	The number of curves' counts to set.

HAPI_DECL HAPI_SetCurveInfo	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		const HAPI_CurveInfo *	info
	)

Set meta-data for the curve mesh, including the curve type, order, and periodicity.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	Currently unused. Input asset geos are assumed to have only one part.
[in]	info	The curve info represents the meta-data about the curves, including the type, order, and periodicity.

HAPI_DECL HAPI_SetCurveKnots	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		const float *	knots_array,
		int	start,
		int	length
	)

Set the knots of the curves in this part.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	Currently unused. Input asset geos are assumed to have only one part.
[in]	knots_array	The knots of each curve.
[in]	start	The index of the first curve.
[in]	length	The number of curves' knots to set. The length of all the knots on a single curve is the order of that curve plus the number of vertices (see HAPI_SetCurveOrders(), and HAPI_SetCurveCounts()).

HAPI_DECL HAPI_SetCurveOrders	(	const HAPI_Session *	session,
		HAPI_NodeId	node_id,
		HAPI_PartId	part_id,
		const int *	orders_array,
		int	start,
		int	length
	)

Set the orders for each curve in the part if the curve has varying order.

Parameters

[in]	session	The session of Houdini you are interacting with. See HAPI_Sessions for more on sessions. Pass NULL to just use the default in-process session.
[in]	node_id	The node id.
[in]	part_id	Currently unused. Input asset geos are assumed to have only one part.
[in]	orders_array	The orders of each curve.
[in]	start	The index of the first curve.
[in]	length	The number of curves' orders to retrieve.