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SYS_Math.intersection() method

Calculate the intersection of two polygons

Signature

function intersection(
	polygon1: TSYS_MathPolygonInput,
	polygon2: TSYS_MathPolygonInput,
): TSYS_MathPolygonGroup;

Parameters

Parameter	Type	Description
polygon1	TSYS_MathPolygonInput	Polygon 1
polygon2	TSYS_MathPolygonInput	Polygon 2

Returns

TSYS_MathPolygonGroup

Polygon group of the intersection result. An empty array means no intersection

Example

// 1. 两块部分重叠的矩形区域
const copperA = [{ x: 0, y: 0 }, { x: 100, y: 0 }, { x: 100, y: 80 }, { x: 0, y: 80 }];
const copperB = [{ x: 50, y: 20 }, { x: 150, y: 20 }, { x: 150, y: 60 }, { x: 50, y: 60 }];

// 2. 求交集，结果为一个新的多边形组
const overlap = eda.sys_Math.intersection(copperA, copperB);
console.log('重叠区域个数：', overlap.length);
console.log('重叠区域外环顶点：', overlap[0].outer.length, '个');
console.log('重叠区域孔洞数：', overlap[0].holes.length);

// 3. 交集面积：100 x 100 与 100 x 80 的重叠部分为 50 x 40 = 2000
console.log('重叠区域面积：', eda.sys_Math.calculateArea(overlap));

// 4. 完全分离的两个多边形没有交集，返回空数组
const far = [{ x: 200, y: 0 }, { x: 280, y: 0 }, { x: 280, y: 40 }, { x: 200, y: 40 }];
console.log('分离区域的交集个数：', eda.sys_Math.intersection(copperA, far).length);