Skip to main content

Geometry Calculations

About 2 min

Geometry Calculations

Geometry utility functions for distance, angles, intersections, area, and more.

Online Examples

ExampleDescriptionLink
Distance CalculationUsage of the distance functionOnline Demo{target="_blank"}
Angle CalculationUsage of getAngleBetweenPointsOnline Demo{target="_blank"}
Midpoint CalculationUsage of getMidPointOnline Demo{target="_blank"}
Intersection CalculationUsage of GeometryCalculatorOnline Demo{target="_blank"}
Bounding BoxUsage of boundingBoxOnline Demo{target="_blank"}
Point-to-Line Side TestUsage of GeometryCalculator.witchSidePointToLineOnline Demo{target="_blank"}
Area CalculationUsage of calculatePolygonAreaOnline Demo{target="_blank"}
Point in PolygonRay-casting methodOnline Demo{target="_blank"}
Spatial IndexUsage of SpatialIndexOnline Demo{target="_blank"}
Offset AlgorithmOffset lines, arcs, circles, and polylinesOnline Demo{target="_blank"}
Trim AlgorithmEntity trimming based on intersectionsOnline Demo{target="_blank"}
Extend AlgorithmExtend entities to a boundaryOnline Demo{target="_blank"}
Advanced Intersection CalculationIntersections across multiple entity typesOnline Demo{target="_blank"}
Foot of PerpendicularPerpendicular foot from a point to a lineOnline Demo{target="_blank"}
Bounding Box MergeMerge multiple bounding boxesOnline Demo{target="_blank"}
Break SegmentBreak an entity at a specified pointOnline Demo{target="_blank"}
Geometric TransformationsTranslate, rotate, scale, mirrorOnline Demo{target="_blank"}
Centerline ExtractionExtract centerlines from double lines (parallel lines)Online Demo{target="_blank"}
Revision Cloud GenerationGenerate revision clouds with generateRevcloudBulgePointsOnline Demo{target="_blank"}
Smart Block RecognitionDetect repeated patterns and convert to blocksOnline Demo{target="_blank"}
Text Width / HeightmeasureTextLocal / measureTexts laid-out sizesOnline Demo{target="_blank"}

Core APIs

Distance Calculation

const { Point2D, distance } = vjcad;

const p1 = new Point2D(0, 0);
const p2 = new Point2D(100, 100);
const dist = distance(p1, p2);  // 141.42...

Angle Calculation

const { getAngleBetweenPoints } = vjcad;

const angle = getAngleBetweenPoints(p1, p2);  // radians
const angleDeg = angle * 180 / Math.PI;

Intersection Calculation

const { GeometryCalculator } = vjcad;

const intersection = GeometryCalculator.lineLineIntersection(
    line1.startPoint, line1.endPoint,
    line2.startPoint, line2.endPoint
);

Bounding Box

const bbox = entity.boundingBox();
console.log(bbox.minX, bbox.minY, bbox.maxX, bbox.maxY);

const merged = BoundingBox.merge([bbox1, bbox2, bbox3]);

Text Width / Height

Measure laid-out text size with local WASM or server ODA before auto-layout:

const { measureTextLocal, measureTexts } = vjcad;

const local = measureTextLocal({ type: 'TEXT', text: 'Sample', height: 3 });
const batch = await measureTexts(
    [{ text: 'Wrap', height: 2.5, width: 40, type: 'MTEXT' }],
    { mode: 'local' }
);

See Text Width / Height Measurement for full options and server routing.