FLDFget_node_connect, FLDFset_node_connect

Synopsis

get/set the node connectivity list of a specified cell set


INTEGER FLDFget_node_connect (cell_set, node_conn_array, size, mode)
INTEGER cell_set(OIDSIZ)
INTEGER node_conn_array
INTEGER size
INTEGER mode

INTEGER FLDFset_node_connect (cell_set, node_conn_array, size, mode)
INTEGER cell_set(OIDSIZ)
INTEGER node_conn_array
INTEGER size
INTEGER mode

Description

These routines get/set the node connectivity array (node_connect_list) within a specified cell set

The FLDFget_node_connect routine can be used for both getting and setting the node_connect_list array. When setting with a "get" routine (mode = OM_GET_ARRAY_WR or OM_GET_ARRAY_RW), it returns an integer representing a pointer to an integer representing a pointer to a pre-allocated array, and the developer just needs to fill in the values.

If the cell set is a Poly cell set (specifically a Polyhedron cell set), this routine returns the connectivity array of the elementary primitive line or triangle cells, not the polygons themselves. You almost never want to call FLDFset_node_connect() on a polyhedron cell set, since this would set the connectivity of the "primitive" triangular cells making up the polygons, not the connectivity of the polygons themselves. To set the connectivity of the polygons, use FLDFset_poly_connect().

To access data array you will need to use ARRFoffset function described in Appendix D of Developers Reference.

Parameters

cell_set

The integer id of a cell set, as returned by the FLDFget_cell_set routine.

node_conn_array

In FLDFget_node_connect, node_conn_array is the address of an integer representing a pointer to an array in which the node connectivity list is returned. Call ARRfree() on this an integer representing a pointer when you are done using it.

In FLDFset_node_connect, node_conn_array is an integer representing a pointer to an array from which the node connectivity list will be copied.

To access data array you will need to use ARRFoffset function described in Appendix D of Developers Reference.

size

In FLDFget_node_connect, size is an integer in which the size of the node connectivity array is returned. (It is usually defined as ncells*cell_nnodes.)

In FLDFset_node_connect, size is an integer that sets the size of the node connectivity array.

"size" is the number of elements in the array irrespective of type. (It is usually defined as ncells * cell_nnodes.)

mode

An integer constant that establishes the access mode for the array subobject. Constants for the possible values are defined in avs/om.h as follows.

For FLDFset_node_connect:

Mode

 

Value

 

Meaning

 

OM_SET_ARRAY_COPY

0

Copy the array into the Object Manager

OM_SET_ARRAY_FREE

1

If possible, do not copy the array. Instead, set the object's array to an integer representing a pointer to node_conn_array. AVS/Express copies the array anyway if the function is running in an external process or if data type conversion is required.

AVS/Express manages the array and will determine when the array can be freed.

You must allocate space for the array with a call to ARRFalloc.

OM_SET_ARRAY_STATIC

2

If possible, do not copy the array. Instead, set the object's array to an integer representing a pointer to node_conn_array. AVS/Express copies the array anyway if the function is running in an external process or if data type conversion is required.

AVS/Express does not manage the array. You must ensure that the array is valid for the life of the object or until the object replaces the array.

 

For FLDFget_node_connect:

Mode

 

Value

 

Meaning

 

OM_GET_ARRAY_RD

0

The program reads the array, but does not write to it.

OM_GET_ARRAY_WR

1

The program writes to the array, completely replacing it.

OM_GET_ARRAY_RW

2

The program reads from and writes to the array.

OM_GET_ARRAY_RD_COPY

3

The program requires a copy of the array for its own, private use (reading or writing).