MPxImagePlane Class Reference
[OpenMaya - API module for common classes, Proxy classes]

#include <MPxImagePlane.h>

Inheritance diagram for MPxImagePlane:

[legend]

Collaboration diagram for MPxImagePlane:

[legend]

List of all members.

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Detailed Description

Base class for user defined imagePlane nodes.

MPxImagePlane provides you with the ability to write your own image plane classes. This allows you to support non-standard image data in an image plane or change the standard behaviour of the image plane.

Note, once you have created a custom image plane and created the node in a scene. You must attach the image plane to a camera using the 'imagePlane' attribute on the 'cameraShape'.

Examples:

customImagePlane.cpp.

Public Member Functions
	MPxImagePlane ()
virtual	~MPxImagePlane ()
virtual MPxNode::Type	type () const
virtual MStatus	loadImageMap (const MString &fileName, int frame, MImage &image)
bool	getExactImageFile (const MString &refFileName, MString &actualName)
MString	exactImageFile (const MString &refFileName)
void	refreshImage ()
void	setImageDirty ()
Static Public Attributes
static MObject	imageType
	controls the source of the image on the Image plane.
static MObject	imageName
static MObject	useFrameExtension
static MObject	frameExtension
	The frame extension in Image Name is replaced by the number here.
static MObject	coverage
	Controls the amount of the image that will be used in the image plane.
static MObject	coverageX
	The width in pixels of the area on the source image to be used.
static MObject	coverageY
	The height in pixels of the area on the source image to be used.
static MObject	coverageOrigin
static MObject	coverageOriginX
	The pixel position of the left edge of the area of the source image to be used.
static MObject	coverageOriginY
	The pixel position of the bottom edge of the area of the source image to be used.
static MObject	sourceTexture
static MObject	fit
	Controls how the image file will be fit into the image plane.
static MObject	displayMode
static MObject	displayOnlyIfCurrent
static MObject	colorGain
	A multiplier applied to the colors in the image plane.
static MObject	colorGainR
	The red component of Color Gain.
static MObject	colorGainG
	The green component of Color Gain.
static MObject	colorGainB
	The blue component of Color Gain.
static MObject	colorOffset
	An additive value applied to the colors in the image plane.
static MObject	colorOffsetR
	The red component of Color Offset.
static MObject	colorOffsetG
	The green component of Color Offset.
static MObject	colorOffsetB
	The blue component of Color Offset.
static MObject	alphaGain
	A multiplier that is applied to the alpha value.
static MObject	shadingSamplesOverride
	The flag to control if this surface should override global shading sample settings.
static MObject	shadingSamples
	Specifies the minimum number of shading samples should be taken for this surface during rendering.
static MObject	maxShadingSamples
	Specifies the max number of shading samples can be taken for this surface during rendering.
static MObject	lockedToCamera
	If enabled, the image plane is locked to the camera's position.
static MObject	depth
	Controls the distance of the plane from the camera.
static MObject	squeezeCorrection
	Applies a horizontal scaling to an image.
static MObject	size
	Controls the width and height of the image plane.
static MObject	sizeX
	Image plane width.
static MObject	sizeY
	Image plane height.
static MObject	offset
static MObject	offsetX
	Horizontal component of Offset.
static MObject	offsetY
	Vertical component of Offset.
static MObject	center
static MObject	centerX
	X component of Center.
static MObject	centerY
	Y component of Center.
static MObject	centerZ
	Z component of Center.
static MObject	width
	Controls the width of the image plane in world space.
static MObject	height
	Controls the height of the image plane in world space.
static MObject	visibleInReflections
static MObject	visibleInRefractions
static MObject	rotate
	Rotation of the image plane around the view vector.
static MObject	alreadyPremult
static MObject	useDepthMap
	Indicates that the image plane has depth information.
static MObject	composite
static MObject	depthOversample
static MObject	separateDepth
static MObject	depthFile
	Separate file that contains depth information.
static MObject	depthBias
	Depth offset value -- centered at the center of the view frustum.
static MObject	depthScale
	Scale the depth -- centered at the center of the view frustum.

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Constructor & Destructor Documentation

MPxImagePlane::MPxImagePlane

(

)

Class constructor.

MPxImagePlane::~MPxImagePlane

(

)

[virtual]

Class destructor.

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Member Function Documentation

MPxNode::Type MPxImagePlane::type

(

)

const [virtual]

Returns the type of node that this is. This is used to differentiate user defined nodes that are derived off different MPx base classes.

It is not necessary to override this method.

Returns:

Type of the node

Reimplemented from MPxNode.

MStatus MPxImagePlane::loadImageMap	(	const MString &	fileName,
		int	frame,
		MImage &	image
	)			[virtual]

Override this method to load the file of name fileName into the image MImage.

Parameters:

[in]	fileName	The name of the file to be loaded.
[in]	frame	The frame number to be displayed.
[in]	image	The image representing the image plane data.

Returns:

MStatus::kSuccss The file was successfully loaded.

Examples:

customImagePlane.cpp.

bool MPxImagePlane::getExactImageFile	(	const MString &	refFileName,
		MString &	actualName
	)

API users can call this method to resolve a file name. Sometimes the file path specified by the user node are relative or contain environment variables that require expansion. Also getExactImageFile() will try to find the image file sequence if use sequence is on. API users do not have to call this method, and it is only provided for convienence purposes. The full path name will be returned in actualName.

Python Notes

This method is not supported in Python, see exactImageFile() instead

Parameters:

[in]	refFileName	The file name to be expanded
[in]	actualName	The exact file name.

Returns:

• true The file was found and the file name was expanded.
• false The file was not found and the file name was not expanded.

MString MPxImagePlane::exactImageFile

(

const MString &

refFileName

)

API users can call this method to resolve a file name. Sometimes the file path specified by the user node are relative or contain environment variables that require expansion. Also getExactImageFile() will try to find the image file sequence if use sequence is on. API users do not have to call this method, and it is only provided for convienence purposes. The full path name will be returned in actualName.

Parameters:

[in]

refFileName

The file name to be expanded

Returns:

String containing the image file name, will be empty string on failure

void MPxImagePlane::refreshImage

(

)

Forces the image plane to be refreshed.

void MPxImagePlane::setImageDirty

(

)

Forces the image plane to be reloaded on the next refresh.

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Member Data Documentation

MObject MPxImagePlane::imageName [static]

The file name of the image to be used in the image plane. Only used if Type is set to Image File.

MObject MPxImagePlane::useFrameExtension [static]

When this is on, the system will substitute the frame number in the Image Name with the number from the Frame Extension attribute (see below).

MObject MPxImagePlane::coverageOrigin [static]

Controls the lower-left-corner of the area of the input image that will be used on the image plane.

MObject MPxImagePlane::sourceTexture [static]

If the Type attribute is set to Texture, then this attribute is connected to the texture node used by the image plane.

MObject MPxImagePlane::displayMode [static]

Controls how the image plane will be displayed both in the 3d view, and when rendered.

MObject MPxImagePlane::displayOnlyIfCurrent [static]

If enabled, you will only see the image plane when you are looking through the camera that the plane is attached to.

MObject MPxImagePlane::offset [static]

Controls how much the center of the image plane is offset from the centre of the viewing frustum of the camera.

MObject MPxImagePlane::center [static]

Controls the world-space position of the center of the image plane.

MObject MPxImagePlane::visibleInReflections [static]

When ray tracing, controls whether the image plane will sppear in reflected surfaces.

MObject MPxImagePlane::visibleInRefractions [static]

When ray tracing, controls whether the image plane will appear when seen through a transparent, refractive surface.

MObject MPxImagePlane::alreadyPremult [static]

Indicates if the image plane has already been pre-multiplied by its alpha.

MObject MPxImagePlane::composite [static]

Indicates whether or not the image plane's color should be composited into the final image.

MObject MPxImagePlane::depthOversample [static]

Indicates if the depth information is at a higher resolution than the image resolution.

MObject MPxImagePlane::separateDepth [static]

Users can specify a depth buffer that is larger than the image buffer using the 'depthFile' attribute.