Spiral Transform

Spirals one image into another. The output image is divided into a grid. The cells in the grid transform from the first image to the second image in a spiral order—clockwise and inward from the upper-left corner.

Note To use this transform, you need to have Microsoft® DirectX® Media 6, Microsoft Internet Explorer 5, Microsoft Windows® 98 Second Edition, or Windows 2000 installed.

For more information, see Installation and Redistribution Information.

Transform Specifications

The following table contains the information you need in order to use this transform in C++ and script.

Class identifier (CLSID)	CLSID_CrSpiral
Globally unique identifier (GUID)	ACA97E00-0C7D-11d2-A484-00C04F8EFB69
Programmatic identifier (ProgId)	DXImageTransform.Microsoft.CrSpiral
Category identifier (CATID)	CATID_DXImageTransform
Custom interfaces	ICrSpiral
Supported interfaces	IDXEffect
Inputs	Two required of type IDXSurface.
Output	IDXSurface

Custom Properties

The following table lists the custom properties that control the transform output.

Property	Type	Default	Description
GridSizeX, GridSizeY	short	16 in the longer dimension	Number of cells in the grid in the x-direction and y-direction. By default, the longer dimension is 16, and the shorter dimension is determined by the image size in order to make the cells relatively square.