A set of functions for working with geometries. More...

Inherits Finalizable.

Static Public Member Functions
static double	distanceBetweenGlobalPoints (GlobalPoint from, GlobalPoint to)
	Get distance between GPS points.

static double	distanceBetweenPoints (Point from, Point to)
	Get distance between points.

static double	segmentLength (Segment segment)
	Get length of segment.

static double	polygonArea (Polygon polygon)
	Get polygon area.

static Point	polygonCenter (Polygon polygon)
	Get polygon geometric center.

static bool	polygonContainsPoint (Polygon polygon, Point point)
	Checks that polygon contains point.

static double	segmentPointDistance (Segment segment, Point point)
	Get distance from segment to point.

static bool	segmentIntersectsSegment (Segment segment1, Segment segment2)
	Checks the intersection of two segments.

static Point	segmentIntersectionSegment (Segment segment1, Segment segment2)
	Calculate the intersection point of two segments.

static double	divisionRatioBySegment (Segment segment1, Segment segment2)
	Calculate the division ratio of a segment by a given segment(if intersects)

static Point	getRatioPoint (Segment segment, double r)
	Calculate projection point on a segment.

static double	getProjectionRatio (Segment segment, Point point)
	Calculate the division ratio of a segment by a given point Calculate projection point on a segment.

Detailed Description

A set of functions for working with geometries.

Definition at line 23 of file geometry_utils.dart.

Member Function Documentation

◆ distanceBetweenGlobalPoints()

static double GeometryUtils.distanceBetweenGlobalPoints	(	GlobalPoint	from,
		GlobalPoint	to )

static

Get distance between GPS points.

Parameters

from	start point of calculation GlobalPoint
to	end point of calculation GlobalPoint

Returns: distance in meters

Dart code snippet:

    // Calculate distance between global points
    double globalDistance = GeometryUtils.distanceBetweenGlobalPoints(globalPoint1, globalPoint2);
    print("Distance between Moscow and St. Petersburg: ${globalDistance.toStringAsFixed(2)} meters");

◆ distanceBetweenPoints()

static double GeometryUtils.distanceBetweenPoints	(	Point	from,
		Point	to )

static

Get distance between points.

Parameters

from	start point of calculation Point
to	end point of calculation Point

Returns: distance in meters

Dart code snippet:

    // Calculate distance between points
    double distance = GeometryUtils.distanceBetweenPoints(point1, point2);
    print("Distance between P1 and P2: ${distance.toStringAsFixed(2)} meters");

◆ divisionRatioBySegment()

static double GeometryUtils.divisionRatioBySegment	(	Segment	segment1,
		Segment	segment2 )

static

Calculate the division ratio of a segment by a given segment(if intersects)

Parameters

segment1	first segment of calculation Segment
segment2	second segment of calculation Segment

Returns: division ratio

Dart code snippet:

    // Calculate division ratio
    double divisionRatio = GeometryUtils.divisionRatioBySegment(segment1, segment2);
    print("Division ratio: ${divisionRatio.toStringAsFixed(2)}");

◆ getProjectionRatio()

static double GeometryUtils.getProjectionRatio	(	Segment	segment,
		Point	point )

static

Calculate the division ratio of a segment by a given point Calculate projection point on a segment.

Parameters

segment	segment of calculation Segment
point	point of calculation Point

Returns: division ratio

Dart code snippet:

    // Calculate projection ratio
    double projectionRatio = GeometryUtils.getProjectionRatio(segment1, testPoint);
    print("Projection ratio: ${projectionRatio.toStringAsFixed(2)}");

◆ getRatioPoint()

static Point GeometryUtils.getRatioPoint	(	Segment	segment,
		double	r )

static

Calculate projection point on a segment.

Parameters

segment	segment of calculation Segment
r	division ratio

Returns: ratio point Point

Dart code snippet:

    // Get point at specific ratio
    double ratio = 0.5;
    Point ratioPoint = GeometryUtils.getRatioPoint(segment1, ratio);
    print("Point at ratio $ratio: (${ratioPoint.x.toStringAsFixed(2)}, ${ratioPoint.y.toStringAsFixed(2)})");

◆ polygonArea()

static double GeometryUtils.polygonArea ( Polygon polygon )

static

Get polygon area.

Parameters

polygon polygon object for calculation Polygon

Returns: area in meters

Dart code snippet:

    // Calculate polygon area
    double area = GeometryUtils.polygonArea(polygon);
    print("Polygon area: ${area.toStringAsFixed(2)} square meters");

◆ polygonCenter()

static Point GeometryUtils.polygonCenter ( Polygon polygon )

static

Get polygon geometric center.

Parameters

polygon polygon object for calculation Polygon

Returns: center point Point

Dart code snippet:

    // Calculate polygon center
    Point center = GeometryUtils.polygonCenter(polygon);
    print("Polygon center: (${center.x.toStringAsFixed(2)}, ${center.y.toStringAsFixed(2)})");

◆ polygonContainsPoint()

static bool GeometryUtils.polygonContainsPoint	(	Polygon	polygon,
		Point	point )

static

Checks that polygon contains point.

Parameters

polygon	polygon object in which looking for contents Polygon
point	checking point object Point

Returns: contains or not

Dart code snippet:

    // Check if polygon contains point
    Point insidePoint = Point(5.0, 5.0);
    Point outsidePoint = Point(15.0, 15.0);
    
    bool containsInside = GeometryUtils.polygonContainsPoint(polygon, insidePoint);
    bool containsOutside = GeometryUtils.polygonContainsPoint(polygon, outsidePoint);
    
    print("Polygon contains inside point: $containsInside");
    print("Polygon contains outside point: $containsOutside");

◆ segmentIntersectionSegment()

static Point GeometryUtils.segmentIntersectionSegment	(	Segment	segment1,
		Segment	segment2 )

static

Calculate the intersection point of two segments.

Parameters

segment1	first segment of calculation Segment
segment2	second segment of calculation Segment

Returns: intersection point Point

Dart code snippet:

    // Calculate intersection point
    Point intersection = GeometryUtils.segmentIntersectionSegment(segment1, segment2);
    print("Intersection point: (${intersection.x.toStringAsFixed(2)}, ${intersection.y.toStringAsFixed(2)})");

◆ segmentIntersectsSegment()

static bool GeometryUtils.segmentIntersectsSegment	(	Segment	segment1,
		Segment	segment2 )

static

Checks the intersection of two segments.

Parameters

segment1	first segment of calculation Segment
segment2	second segment of calculation Segment

Returns: intersects or not

Dart code snippet:

    // Check if segments intersect
    bool intersects = GeometryUtils.segmentIntersectsSegment(segment1, segment2);
    print("Segments intersect: $intersects");

◆ segmentLength()

static double GeometryUtils.segmentLength ( Segment segment )

static

Get length of segment.

Parameters

segment segment object for calculation Segment

Returns: length in meters

Dart code snippet:

    // Calculate segment length
    double length1 = GeometryUtils.segmentLength(segment1);
    double length2 = GeometryUtils.segmentLength(segment2);
    print("Segment1 length: ${length1.toStringAsFixed(2)} meters");
    print("Segment2 length: ${length2.toStringAsFixed(2)} meters");

◆ segmentPointDistance()

static double GeometryUtils.segmentPointDistance	(	Segment	segment,
		Point	point )

static

Get distance from segment to point.

Parameters

segment	start segment of calculation Segment
point	end point of calculation Point

Returns: distance in meters

Dart code snippet:

    // Calculate distance from segment to point
    double distanceToPoint = GeometryUtils.segmentPointDistance(segment1, testPoint);
    print("Distance from segment1 to test point: ${distanceToPoint.toStringAsFixed(2)} meters");

The documentation for this class was generated from the following file:

geometry_utils.dart

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ distanceBetweenGlobalPoints()

◆ distanceBetweenPoints()

◆ divisionRatioBySegment()

◆ getProjectionRatio()

◆ getRatioPoint()

◆ polygonArea()

◆ polygonCenter()

◆ polygonContainsPoint()

◆ segmentIntersectionSegment()

◆ segmentIntersectsSegment()

◆ segmentLength()

◆ segmentPointDistance()