Roll Transform

Takes one image input and produces a three-dimensional (3-D) sheet that rolls out to display the image, like a rolling carpet. The image is textured on both the front and back faces of the sheet in the x-y plane. The sheet has the same aspect ratio as the image, is centered at the origin, and spans the range [-1, 1] in its longer extent.

Note To use this transform, you need to have Microsoft® Windows® 98 Second Edition or Windows 2000 installed.

Transform Specifications

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

Class identifier (CLSID)	CLSID_Roll
Globally unique identifier (GUID)	78F30B82-48AA-11D2-9900-0000F803FF7A
Programmatic identifier (ProgId)	DX3DTransform.Microsoft.Roll
Category identifier (CATID)	CATID_DX3DTransform
Custom interfaces	IDXTRoll
Supported interfaces	IDXEffect
Inputs	One is required, of type IDXSurface.
Output	Direct3DRMMeshBuilder3

Custom Properties

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

Property	Type	Default	Description
DirectionX	float	1.0	The x-component of the direction along which the sheet unrolls.
DirectionY	float	0.0	The y-component of the direction along which the sheet unrolls.
Radius	float	0.15	The radius of the roll in 3-D coordinate units.