You are here: Start » Function Reference » Shape Features » ShapeElongation

ShapeElongation

Computes the elongation factor of a shape (perfect circle has minimal elongation equal 1.0).

Syntax

void avl::ShapeElongation
(
	const avl::Path& inShape,
	float& outElongation
)

void ShapeElongation
(
	Path inShape,
	out float outElongation
)

Parameters

	Name	Type	Default	Description
	inShape	const Path&
	outElongation	float&

Description

Elongation is a measure of how long the shape is in relation to its width. The perfect circle has the minimal elongation equal to 1.0, while the upper bound doesn't exist. The operation internally approximates the shape with an ellipse, and then computes the result as: Where L denotes the longer axis of the approximating ellipse, and S denotes the shorter one.

Note that if the input path is not a valid shape (i.e. it has at least one self-intersection), the computation may lead to results that are not intuitive.

Examples

Elongation of the sample shape equals to 3.283.

Elongation of the sample shape equals to 1.001.

Errors