ocmath_f_polygon_area

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

In this function, divide the polygon into trapezias by both ends of polygon's borders, then for every trapezium, calculate its area by (y1+y2)*(x2-x1)/2, that is also why sometimes it will get a negative area value.

Data types supported:

double: ocmath_d_polygon_area

float: ocmath_f_polygon_area

POINT: ocmath_l_polygon_area

Syntax

float ocmath_f_polygon_area(float* pX, float* pY, uint nSize)

Parameters

pX: [input] buffer containing X data of polygon vertexes
pY: [input] buffer containing Y data of polygon vertexes
nSize: [input] size of pX, pY

Return

Polygon area.

Examples

Remark

header to Include

origin.h