IlvFillAccessor Class Reference

Polygon filling behavior. More...

#include <ilviews/protos/fillacc.h>

Inheritance diagram for IlvFillAccessor:

List of all members.

Public Member Functions
	IlvFillAccessor (const char *name, const IlvValueTypeClass *type, const char *nodeName, const char *fillerName, const char *angle)
	Creates a fill behavior.
Protected Member Functions
virtual IlBoolean	changeValue (IlvAccessorHolder *object, const IlvValue &val)
	Called by the method IlvAccessible::changeValue for each IlvAccessor attached to the IlvAccessorHolder.
virtual IlvValue &	queryValue (const IlvAccessorHolder *object, IlvValue &val) const
	Called by the method IlvAccessible::queryValue for each IlvAccessor attached to the IlvAccessorHolder.

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Detailed Description

Polygon filling behavior.

Library: ilvproto

IlvFillAccessor is a subtype of IlvUserAccessor used to "fill" a polygon with another one up to a specified level. It can be used to represent filled tanks or pipes with arbitrary shapes.

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Constructor & Destructor Documentation

IlvFillAccessor::IlvFillAccessor	(	const char *	name,
		const IlvValueTypeClass *	type,
		const char *	nodeName,
		const char *	fillerName,
		const char *	angle
	)

Creates a fill behavior.

This accessor handles a value of name name that represents a filling ratio. The ratio is a floating-point value between 0.0 and 1.0. When the value is changed, the points of the filler polygon are computed so that it is superposed over the filled polygon (except that it is truncated at the level specified by the fill ratio). The filler polygon can be created initially with any number of points and any geometry: its points will be completely recomputed. The fill ratio defines the height of the filler polygon with respect to the height of the filled polygon, and not its surface. The height is computed in the direction defined by the angle. The example below shows a polyline filled with a polygon at a ratio of 0.6 and an angle of 45 degrees.

Parameters:

	name	Name of the attribute.
	type	Type of the attribute. It should be a numeric type such as IlvFloatValueType.
	nodename	Name of a graphic node that must contain an instance of a subclass of IlvPolyPoints (the "filled" polygon).
	fillerName	Name of a graphic node that must contain another IlvPolyPoints (the "filler" polygon).
	angle	Specifies the angle (in degrees) at which the polygon is filled, that is, the angle of the segment representing the limit of the filling fluid. If angle is equal to 0, the polygon is filled from bottom to top, and the segment is horizontal. If angle is equal to 90, the polygon is filled from left to right, and the segment is vertical. angle can take any value, not only multiples of 90. The angle parameter can contain a constant value (for example, 90), the name of another accessor (for example, fillAngle), or any arithmetic expression containing accessor names or constants (for example, radians/3.1415*180).

See also:

IlvUserAccessor::getValue.