RegionIntersection

RegionIntersection[reg1,reg2,]

gives the intersection of the regions reg1, reg2, .

Details and Options

Examples

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Basic Examples  (2)

Intersection of two disks:

Visualize it:

Intersection of two MeshRegion objects:

Scope  (13)

Special Regions  (7)

For some regions, intersection is computed explicitly:

Visualize the intersection:

An intersection of an infinite line and a ball:

Visualize the intersection:

An intersection of Line regions:

Visualize it:

An intersection of Polygon regions:

Visualize it:

An intersection of two Disk regions:

Visualize it:

An intersection of a cuboid a cone:

Visualize it:

An intersection of regions with different RegionDimension:

Visualize it:

Formula Regions  (2)

An intersection of ImplicitRegion objects is an ImplicitRegion:

2D:

3D:

nD:

An intersection of ParametricRegion objects:

Visualize it:

Mesh Regions  (2)

An intersection of BoundaryMeshRegion objects is a BoundaryMeshRegion:

2D:

3D:

An intersection of full-dimensional MeshRegion objects is a MeshRegion:

2D:

3D:

Derived Regions  (2)

An intersection of BooleanRegion objects:

Visualize it:

An intersection of TransformedRegion objects:

Visualize it:

Applications  (3)

Intersection of regions:

Define a disk segment as an intersection of a disk and a half-plane:

Define a new basic region diskSegment that uses the same notation as Disk does for disk sectors, so that diskSegment[{x,y},r,{θ1,θ2}] represents the disk segment from θ1 to θ2. Do it by writing it as a RegionIntersection of a Disk and a HalfPlane:

This evaluates an object that is RegionQ and can be used as any other region:

Visualize the disk segment together with the disk:

Properties & Relations  (4)

A point p belongs to RegionIntersection[reg1,reg2,] if it belongs to all regi:

Use RegionMember to test membership:

RegionIntersection is a Boolean combination And of regions:

The RegionMeasure of an intersection obeys a simple formula:

Subtract the measure of the RegionUnion from the sum of the measures:

The RegionDimension of an intersection is at most the minimum of all input dimensions:

It can be lower, however:

These regions overlap only at a point, so the dimension of the intersection is 0:

Possible Issues  (2)

RegionIntersection is defined only for regions with the same RegionEmbeddingDimension:

Components of dimension less than the embedding dimension may be omitted:

Turn on a message:

Neat Examples  (1)

The intersection of two spiral polygons:

Introduced in 2014
 (10.0)
 |
Updated in 2017
 (11.2)