3D Graphics Programming with QuickDraw 3D 1.5.4

Adding Application-Defined Attribute and Element Types

You can add new application-defined attribute and element types by using Q3XAttributeClass_Register and Q3XElementClass_Register . These functions let an application add a new attribute or element type by registering its methods. A unique object type of TQ3AttributeType or TQ3ElementType is returned, which you can use to set and get the custom attribute or element:



 
typedef TQ3ElementType TQ3AttributeType;

Q3XAttributeClass_Register

You can use the Q3XAttributeClass_Register function to add a new attribute type to QuickDraw 3D.



 
TQ3XObjectClass Q3XAttributeClass_Register(

                     TQ3AttributeType    *attributeType,

                     const char          *name,

                     unsigned long       sizeOfElement,

                     TQ3XMetaHandler     metaHandler);

attributeType: A new attribute type, which is returned to you.
name: The new object name, for use in the text metafile.
sizeOfElement: The size, in bytes, required for the new object.
metaHandler: A metahandler that returns nonvirtual methods. This value may be NULL for some classes.

DESCRIPTION

The Q3XAttributeClass_Register function returns, in the attributeType parameter, a new attribute with name name and size sizeOfElement for the metahandler specified by metaHandler.

Q3XElementClass_Register

You can use the Q3XElementClass_Register function to add a new element type to QuickDraw 3D.



 
TQ3XObjectClass Q3XElementClass_Register(

                     TQ3ElementType     *elementType,

                     const char         *name,

                     unsigned long      sizeOfElement,

                     TQ3XMetaHandler    metaHandler);

elementType: A new element type, which QuickDraw 3D assigns and returns to you.
name: The new object name, for use in the text metafile.
sizeOfElement: The size, in bytes, required for the new object.
metaHandler: A metahandler that returns nonvirtual methods. This value may be NULL for some classes.

DESCRIPTION

The Q3XElementClass_Register function returns, in the elementType parameter, a new element with name name and size sizeOfElement for the metahandler specified by metaHandler.

Adding Application-Defined Attribute and Element Types

Q3XAttributeClass_Register

DESCRIPTION

Q3XElementClass_Register

DESCRIPTION

Copy Methods

Deletion Method

Getting the Size of an Attribute or Element

Inheritance Control and Copying