Entity Base

Types

Functions

`A3DStatus`	`A3DRootBaseGet`
`A3DStatus`	`A3DRootBaseSet`
`A3DStatus`	`A3DRootBaseAttributeRemoveAll`
`A3DStatus`	`A3DRootBaseAttributeRemove`
`A3DStatus`	`A3DRootBaseAttributeRemoveAt`
`A3DStatus`	`A3DRootBaseAttributeAppend`
`A3DStatus`	`A3DRootBaseAttributeAdd`

Detailed Description

group a3d_rootbase

Creates and accesses a hierarchy of descriptive names and modeller data that can be applied to any PRC entity.

Entity type is kA3DTypeRootBase

This module lets you create a hierarchy of descriptive names and modeller data (called root-level attributes) that can be applied to any PRC entity. These attributes are packaged as an A3DRootBase entity that is referenced from the PRC entity they describe.

The following sample code shows how to create root-level attributes for any PRC entity. In this case, the attributes include modeller data. For restrictions on specifying modeller data, see A3DMiscAttributeData.

A3DVoid setAttributes(A3DEntity* p)
{
    A3DMiscAttribute* pAttr[3];

    A3DMiscSingleAttributeData Single;
    A3D_INITIALIZE_DATA(Single);

    Single.m_eType = kA3DModellerAttributeTypeString;
    Single.m_pcTitle = "Title";
    Single.m_pcData = "Simple B-rep building demonstration";

    A3DMiscAttributeData sAttribs;
    A3D_INITIALIZE_DATA(sAttribs);

    sAttribs.m_pcTitle = Single.m_pcTitle;
    sAttribs.m_asSingleAttributesData = &Single;
    sAttribs.m_uiSize = 1;
    A3DInt32 iRet = A3DMiscAttributeCreate(&sAttribs, &pAttr[0]);

    Single.m_pcTitle = "Author";
    Single.m_pcData = "HOOPS Exchange";
    sAttribs.m_pcTitle = Single.m_pcTitle;
    iRet = A3DMiscAttributeCreate(&sAttribs, &pAttr[1]);

    Single.m_pcTitle = "Company";
    Single.m_pcData = "Tech Soft 3D";
    sAttribs.m_pcTitle = Single.m_pcTitle;
    iRet = A3DMiscAttributeCreate(&sAttribs, &pAttr[2]);

    A3DRootBaseData sRootData;
    A3D_INITIALIZE_DATA(sRootData);

    sRootData.m_pcName = "Trimmed surface";
    sRootData.m_ppAttributes = pAttr;
    sRootData.m_uiSize = 3;
    iRet = A3DRootBaseSet(p, &sRootData);
    
    // cleaning up the allocated attributes
    for(A3DUns32 i = 0; i < sRootData.m_uiSize; ++i)
    {
        A3DEntityDelete(sRootData.m_ppAttributes[i]);
    }
}

The following illustration shows the result of the sample code.

The sample code creates an A3DRootBase entity that houses three A3DMiscAttribute entities, each of which reference an A3DMiscSingleAttributeData structure. Each A3DMiscSingleAttributeData structure provides modeller data of type kA3DModellerAttributeTypeString.

../../_images/PRC_RootAttributes.png

Function Documentation

A3DStatus A3DRootBaseGet(const A3DRootBase *pRootBase, A3DRootBaseData *pData)

Populates an A3DRootBaseData structure with the data from a PRC entity.

Version: 2.0

Return values:	A3D_INITIALIZE_NOT_CALLED – A3D_INVALID_DATA_STRUCT_SIZE – A3D_INVALID_DATA_STRUCT_NULL – A3D_INVALID_ENTITY_NULL – A3D_INVALID_ENTITY_TYPE – A3D_SUCCESS –
Returns:	`A3D_SUCCESS` on success, or an error code on failure

A3DStatus A3DRootBaseSet(A3DRootBase *pRootBase, const A3DRootBaseData *pData)

Adds an A3DRootBaseData structure to an existing PRC entity.

According to what is defined in the parameter pData, the A3DEntity will be updated.

If A3DRootBaseData::m_pcName is initialized, the entity will be renamed.
Persistent and non-persistent id’s are systematically replaced.
The array A3DRootBaseData::m_ppAttributes will be appended to the current attribute array of the Entity. To manipulate just the Entity attributes, please use the following functions: A3DRootBaseAttributeRemoveAll, A3DRootBaseAttributeRemove, A3DRootBaseAttributeRemoveAt, A3DRootBaseAttributeAppend, A3DRootBaseAttributeAdd.

Version: 2.0

Note