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title: ShapeUtils category: Core layout: docs

ShapeUtils

A class containing utility functions for shapes.

Static Methods

.area( contour : Array.<Vector2> ) : number

Calculate area of a ( 2D ) contour polygon.

contour | An array of 2D points.
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Returns: The area.

.isClockWise( pts : Array.<Vector2> ) : boolean

Returns true if the given contour uses a clockwise winding order.

pts | An array of 2D points defining a polygon.
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Returns: Whether the given contour uses a clockwise winding order or not.

.triangulateShape( contour : Array.<Vector2>, holes : Array.<Array.<Vector2>> ) : Array.<Array.<number>>

Triangulates the given shape definition.

contour | An array of 2D points defining the contour.
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holes | An array that holds arrays of 2D points defining the holes.

Returns: An array that holds for each face definition an array with three indices.

Source

src/extras/ShapeUtils.js