georegression.metric

Class Area2D_F32

java.lang.Object

georegression.metric.Area2D_F32

public class Area2D_F32
extends java.lang.Object

The area contained inside 2D shapes

Constructor Summary

Constructors

Constructor and Description
Area2D_F32()

Method Summary

Modifier and Type	Method and Description
static float	polygonSimple(Polygon2D_F32 poly) Area of a simple polygon.
static float	quadrilateral(Quadrilateral_F32 quad) Area of a quadrilateral computed from two triangles.
static float	triangle(Point2D_F32 a, Point2D_F32 b, Point2D_F32 c) Computes the area of an arbitrary triangle from 3-vertices.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Area2D_F32

public Area2D_F32()

Method Detail

triangle

public static float triangle(Point2D_F32 a,
                             Point2D_F32 b,
                             Point2D_F32 c)

Computes the area of an arbitrary triangle from 3-vertices. area = | a.x*(b.y - c.y) + b.x*(c.y - a.y) + c.x*(a.y - b.y) | / 2

Parameters:

a - Corner point 1

b - Corner point 2

c - Corner point 3

Returns:

area

quadrilateral

public static float quadrilateral(Quadrilateral_F32 quad)

Area of a quadrilateral computed from two triangles.

Parameters:

quad - quadrilateral

Returns:

area

polygonSimple

public static float polygonSimple(Polygon2D_F32 poly)

Area of a simple polygon. Meaning it can be concave or convex, but can't have self intersections

Parameters:

poly - Simple polygon

Returns:

area