Import std.math.polygon

PolygonArea

std.math.polygon

function

Public Function PolygonArea(ring: Vec2[]): Double

The area of the ring, above 0 when it goes counterclockwise and below when it goes clockwise: the shoelace formula, in Doubles.

Examples

Local square = [Vec2(0, 0), Vec2(4, 0), Vec2(4, 4), Vec2(0, 4)]
Expect(PolygonArea(square) == 16.0)
Expect(PointInPolygon(Vec2(1, 1), square) && !PointInPolygon(Vec2(5, 1), square))
Expect(Triangulate(square).Count == 2)

std/math/polygon.fb, line 64

function

Public Function PolygonArea(rings: Vec2[][]): Double

The area of the region, its outer rings' less its holes', as each ring's PolygonArea adds up.

std/math/polygon.fb, line 75

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