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CSGRegionQ[reg]

yields True if the region reg is a valid CSGRegion object and False otherwise.

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CSGRegionQ

CSGRegionQ[reg]

yields True if the region reg is a valid CSGRegion object and False otherwise.

Examples

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Basic Examples  (2)

A valid CSG region in 2D:

Wolfram Language code: CSGRegion["Union", {Disk[], Rectangle[]}]
Wolfram Language code: CSGRegionQ[%]

In 3D:

Wolfram Language code: CSGRegion["Union", {Ball[], Cuboid[]}]
Wolfram Language code: CSGRegionQ[%]

Scope  (3)

CSGRegionQ works on the CSG region Intersection:

Wolfram Language code: CSGRegion["Intersection", {Ball[], Cuboid[]}]
Wolfram Language code: CSGRegionQ[%]

Union:

Wolfram Language code: CSGRegion["Union", {Ball[], Cuboid[]}];
Wolfram Language code: CSGRegionQ[%]

Difference:

Wolfram Language code: CSGRegion["Difference", {Ball[], Cuboid[]}];
Wolfram Language code: CSGRegionQ[%]

CSGRegionQ works on 1-level CSG region:

Wolfram Language code: CSGRegion["Intersection", {Ball[], Cuboid[]}]
Wolfram Language code: CSGRegionQ[%]

Nested CSG region:

Wolfram Language code: CSGRegion["Intersection", {Ball[], CSGRegion["Union", {Ball[], Cuboid[]}]}];
Wolfram Language code: CSGRegionQ[%]

Intersection with more than two regions:

Wolfram Language code: CSGRegion["Intersection", {Ball[], Ball[], Cuboid[], Ball[]}];
Wolfram Language code: CSGRegionQ[%]

CSGRegionQ works on CSG regions in 2D:

Wolfram Language code: CSGRegion["Intersection", {Disk[], Rectangle[]}]
Wolfram Language code: CSGRegionQ[%]

3D:

Wolfram Language code: CSGRegion["Intersection", {Ball[], Cuboid[]}];
Wolfram Language code: CSGRegionQ[%]

D:

Wolfram Language code: CSGRegion["Intersection", {Ball[{0, 0, 0, 0}], Ball[{1, 0, 1, 0}]}];
Wolfram Language code: CSGRegionQ[%]

Properties & Relations  (4)

CSGRegionQ is a special case of RegionQ:

Wolfram Language code: Subscript[ℛ, 1] = CSGRegion["Intersection", {Ball[], Cuboid[]}]; Subscript[ℛ, 2] = ConvexHullMesh[RandomReal[1, {10, 2}]];
Wolfram Language code: CSGRegionQ /@ {Subscript[ℛ, 1], Subscript[ℛ, 2]}
Wolfram Language code: RegionQ /@ {Subscript[ℛ, 1], Subscript[ℛ, 2]}

A CSGRegion is always BoundedRegionQ:

Wolfram Language code: ℛ = CSGRegion["Intersection", {Ball[], Cuboid[]}];
Wolfram Language code: {CSGRegionQ[ℛ], BoundedRegionQ[ℛ]}

A CSGRegion is always ConstantRegionQ:

Wolfram Language code: ℛ = CSGRegion["Intersection", {Ball[], Cuboid[]}];
Wolfram Language code: {CSGRegionQ[ℛ], ConstantRegionQ[ℛ]}

A CSGRegion is solid:

Wolfram Language code: ℛ = CSGRegion["Intersection", {Ball[], Cuboid[]}];
Wolfram Language code: {CSGRegionQ[ℛ], SolidRegionQ[ℛ]}
Wolfram Research (2021), CSGRegionQ, Wolfram Language function, https://reference.wolfram.com/language/ref/CSGRegionQ.html.

Text

Wolfram Research (2021), CSGRegionQ, Wolfram Language function, https://reference.wolfram.com/language/ref/CSGRegionQ.html.

CMS

Wolfram Language. 2021. "CSGRegionQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/CSGRegionQ.html.

APA

Wolfram Language. (2021). CSGRegionQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/CSGRegionQ.html

BibTeX

@misc{reference.wolfram_2026_csgregionq, author="Wolfram Research", title="{CSGRegionQ}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/CSGRegionQ.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_csgregionq, organization={Wolfram Research}, title={CSGRegionQ}, year={2021}, url={https://reference.wolfram.com/language/ref/CSGRegionQ.html}, note=[Accessed: 13-June-2026]}