All geometry and entities are defined in this namespace

### Classes
| Class | Description |
| :- | :- |
| [`BooleanOperand`](/3d/python-net/aspose.threed.entities/booleanoperand) | This class encapsulates the transformed mesh as Boolean operation's operand. |
| [`BooleanOperator`](/3d/python-net/aspose.threed.entities/booleanoperator) | Boolean operator allows you to apply Boolean operation on two [`IMeshConvertible`](/3d/python-net/aspose.threed.entities/imeshconvertible) instances. |
| [`Box`](/3d/python-net/aspose.threed.entities/box) | Box. |
| [`Camera`](/3d/python-net/aspose.threed.entities/camera) | The camera describes the eye point of the viewer looking at the scene. |
| [`Circle`](/3d/python-net/aspose.threed.entities/circle) | A [`Circle`](/3d/python-net/aspose.threed.entities/circle) curve consists of a set of points in the edge of the circle shape. |
| [`CompositeCurve`](/3d/python-net/aspose.threed.entities/compositecurve) | A [`CompositeCurve`](/3d/python-net/aspose.threed.entities/compositecurve) is consisting of several curve segments. |
| [`Curve`](/3d/python-net/aspose.threed.entities/curve) | The base class of all curve implementations. |
| [`Cylinder`](/3d/python-net/aspose.threed.entities/cylinder) | Parameterized Cylinder.
<br/>It can also be used to represent the cone when one of radiusTop/radiusBottom is zero. |
| [`Dish`](/3d/python-net/aspose.threed.entities/dish) | Parameterized dish. |
| [`Ellipse`](/3d/python-net/aspose.threed.entities/ellipse) | An [`Ellipse`](/3d/python-net/aspose.threed.entities/ellipse) defines a set of points that form the shape of ellipse. |
| [`EndPoint`](/3d/python-net/aspose.threed.entities/endpoint) | The end point to trim the curve, can be a parameter value or a Cartesian point. |
| [`Frustum`](/3d/python-net/aspose.threed.entities/frustum) | The base class of [`Camera`](/3d/python-net/aspose.threed.entities/camera) and [`Light`](/3d/python-net/aspose.threed.entities/light) |
| [`Geometry`](/3d/python-net/aspose.threed.entities/geometry) | The base class of all renderable geometric objects (like [`Mesh`](/3d/python-net/aspose.threed.entities/mesh), [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface), [`Patch`](/3d/python-net/aspose.threed.entities/patch) and etc.).
<br/><br/><br/><br/>
<br/>The [`Geometry`](/3d/python-net/aspose.threed.entities/geometry) base class supports:  
<br/><br/>* **Control point management** , control points defines the base 3D spatial structure of the geometry, different geometric types has different way to define concrete 3D models. **Vertex element definition** , vertex elements applies extra information like normals/uv coordinates/vertex colors to the geometry, see [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) for more details.**Object deforming** , [`Deformer`](/3d/python-net/aspose.threed.deformers/deformer) can be bonded to animate geometry's shape.<br/><br/>* **Control point management** , control points defines the base 3D spatial structure of the geometry, different geometric types has different way to define concrete 3D models. **Vertex element definition** , vertex elements applies extra information like normals/uv coordinates/vertex colors to the geometry, see [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) for more details.**Object deforming** , [`Deformer`](/3d/python-net/aspose.threed.deformers/deformer) can be bonded to animate geometry's shape.<br/><br/>* **Control point management** , control points defines the base 3D spatial structure of the geometry, different geometric types has different way to define concrete 3D models. **Vertex element definition** , vertex elements applies extra information like normals/uv coordinates/vertex colors to the geometry, see [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) for more details.**Object deforming** , [`Deformer`](/3d/python-net/aspose.threed.deformers/deformer) can be bonded to animate geometry's shape. |
| [`HalfSpace`](/3d/python-net/aspose.threed.entities/halfspace) | [`HalfSpace`](/3d/python-net/aspose.threed.entities/halfspace) represents a infinity space which is split by a plane, this can be used with [`BooleanOperator`](/3d/python-net/aspose.threed.entities/booleanoperator) |
| [`IIndexedVertexElement`](/3d/python-net/aspose.threed.entities/iindexedvertexelement) | VertexElement with indices data. |
| [`IMeshConvertible`](/3d/python-net/aspose.threed.entities/imeshconvertible) | Entities that implemented this interface can be converted to [`Mesh`](/3d/python-net/aspose.threed.entities/mesh) |
| [`IOrientable`](/3d/python-net/aspose.threed.entities/iorientable) | Orientable entities shall implement this interface. |
| [`Light`](/3d/python-net/aspose.threed.entities/light) | The light illuminates the scene.
<br/><br/><br/><br/>
<br/>The formula to calculate the total attenuation of light is:
<br/>`A = ConstantAttenuation + (Dist * LinearAttenuation) + ((Dist^2) * QuadraticAttenuation)` |
| [`Line`](/3d/python-net/aspose.threed.entities/line) | A polyline is a path defined by a set of points with [`Geometry.control_points`](/3d/python-net/aspose.threed.entities/geometry#control_points), and connected by [`Line.segments`](/3d/python-net/aspose.threed.entities/line#segments),
<br/>which means it can also be a set of connected line segments.
<br/>The line is usually a linear object, which means it cannot be used to represent a curve, in order to represent a curve, uses [`NurbsCurve`](/3d/python-net/aspose.threed.entities/nurbscurve). |
| [`LinearExtrusion`](/3d/python-net/aspose.threed.entities/linearextrusion) | Linear extrusion takes a 2D shape as input and extends the shape in the 3rd dimension. |
| [`Mesh`](/3d/python-net/aspose.threed.entities/mesh) | A mesh is made of many n-sided polygons. |
| [`NurbsCurve`](/3d/python-net/aspose.threed.entities/nurbscurve) | [NURBS curve](https://en.wikipedia.org/wiki/Non-uniform_rational_B-spline) is a curve represented by NURBS(Non-uniform rational basis spline),
<br/>A NURBS curve is defined by its [`NurbsCurve.order`](/3d/python-net/aspose.threed.entities/nurbscurve#order), a set of weighted [`Geometry.control_points`](/3d/python-net/aspose.threed.entities/geometry#control_points) and a [`NurbsCurve.KnotVectors`](/3d/python-net/aspose.threed.entities/nurbscurve)
<br/>The w component in control point is used as control point's weight, whatever it is a [`CurveDimension.TWO_DIMENSIONAL`](/3d/python-net/aspose.threed.entities/curvedimension#TWO_DIMENSIONAL) or [`CurveDimension.THREE_DIMENSIONAL`](/3d/python-net/aspose.threed.entities/curvedimension#THREE_DIMENSIONAL) |
| [`NurbsDirection`](/3d/python-net/aspose.threed.entities/nurbsdirection) | A 3D [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface) has two direction, the [`NurbsSurface.u`](/3d/python-net/aspose.threed.entities/nurbssurface#u) and [`NurbsSurface.v`](/3d/python-net/aspose.threed.entities/nurbssurface#v), the [`NurbsDirection`](/3d/python-net/aspose.threed.entities/nurbsdirection) defines data for each direction.
<br/>A direction is actually a NURBS curve, that means it's also defined by its [`NurbsDirection.order`](/3d/python-net/aspose.threed.entities/nurbsdirection#order), a [`NurbsDirection.KnotVectors`](/3d/python-net/aspose.threed.entities/nurbsdirection), and a set of weighted control points(defined in [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface)). |
| [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface) | [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface) is a surface represented by [NURBS(Non-uniform rational basis spline)](https://en.wikipedia.org/wiki/Non-uniform_rational_B-spline),
<br/>A [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface) is defined by two [`NurbsDirection`](/3d/python-net/aspose.threed.entities/nurbsdirection)[`NurbsSurface.u`](/3d/python-net/aspose.threed.entities/nurbssurface#u) and [`NurbsSurface.v`](/3d/python-net/aspose.threed.entities/nurbssurface#v).
<br/>The w component in control point is used as control point's weight whatever the direction's type is a [`CurveDimension.TWO_DIMENSIONAL`](/3d/python-net/aspose.threed.entities/curvedimension#TWO_DIMENSIONAL) or [`CurveDimension.THREE_DIMENSIONAL`](/3d/python-net/aspose.threed.entities/curvedimension#THREE_DIMENSIONAL) |
| [`Patch`](/3d/python-net/aspose.threed.entities/patch) | A [`Patch`](/3d/python-net/aspose.threed.entities/patch) is a parametric modeling surface, similar to [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface), it's also defined by two 
<br/>[`PatchDirection`](/3d/python-net/aspose.threed.entities/patchdirection), the [`Patch.u`](/3d/python-net/aspose.threed.entities/patch#u) and [`Patch.v`](/3d/python-net/aspose.threed.entities/patch#v).
<br/>
<br/>But difference between [`Patch`](/3d/python-net/aspose.threed.entities/patch) and [`NurbsSurface`](/3d/python-net/aspose.threed.entities/nurbssurface) is that the [`PatchDirection`](/3d/python-net/aspose.threed.entities/patchdirection) curve 
<br/>can be one of [`PatchDirectionType.BEZIER`](/3d/python-net/aspose.threed.entities/patchdirectiontype#BEZIER), [`PatchDirectionType.QUADRATIC_BEZIER`](/3d/python-net/aspose.threed.entities/patchdirectiontype#QUADRATIC_BEZIER), [`PatchDirectionType.BASIS_SPLINE`](/3d/python-net/aspose.threed.entities/patchdirectiontype#BASIS_SPLINE), [`PatchDirectionType.CARDINAL_SPLINE`](/3d/python-net/aspose.threed.entities/patchdirectiontype#CARDINAL_SPLINE) and [`PatchDirectionType.LINEAR`](/3d/python-net/aspose.threed.entities/patchdirectiontype#LINEAR) |
| [`PatchDirection`](/3d/python-net/aspose.threed.entities/patchdirection) | Patch's U and V direction. |
| [`Plane`](/3d/python-net/aspose.threed.entities/plane) | Parameterized plane. |
| [`PointCloud`](/3d/python-net/aspose.threed.entities/pointcloud) | The point cloud contains no topology information but only the control points and the vertex elements. |
| [`PolygonBuilder`](/3d/python-net/aspose.threed.entities/polygonbuilder) | A helper class to build polygon for [`Mesh`](/3d/python-net/aspose.threed.entities/mesh) |
| [`PolygonModifier`](/3d/python-net/aspose.threed.entities/polygonmodifier) | Utilities to modify polygons |
| [`Primitive`](/3d/python-net/aspose.threed.entities/primitive) | Base class for all primitives |
| [`Pyramid`](/3d/python-net/aspose.threed.entities/pyramid) | Parameterized pyramid. |
| [`RectangularTorus`](/3d/python-net/aspose.threed.entities/rectangulartorus) | Parameterized rectangular torus. |
| [`RevolvedAreaSolid`](/3d/python-net/aspose.threed.entities/revolvedareasolid) | This class represents a solid model by revolving a cross section provided by a profile about an axis. |
| [`Shape`](/3d/python-net/aspose.threed.entities/shape) | The shape describes the deformation on a set of control points, which is similar to the cluster deformer in Maya.
<br/>For example, we can add a shape to a created geometry. 
<br/>And the shape and the geometry have the same topological information but different position of the control points. 
<br/>With varying amounts of influence, the geometry performs a deformation effect. |
| [`Skeleton`](/3d/python-net/aspose.threed.entities/skeleton) | The [`Skeleton`](/3d/python-net/aspose.threed.entities/skeleton) is mainly used by CAD software to help designer to manipulate the transformation of skeletal structure, it's usually useless outside the CAD softwares.
<br/>To make the skeleton hierarchy acts like one object in CAD software, it's necessary to mark the top [`Skeleton`](/3d/python-net/aspose.threed.entities/skeleton) node as the root one by setting [`Skeleton.type`](/3d/python-net/aspose.threed.entities/skeleton#type) to [`SkeletonType.SKELETON`](/3d/python-net/aspose.threed.entities/skeletontype#SKELETON),
<br/>and all children set to [`SkeletonType.BONE`](/3d/python-net/aspose.threed.entities/skeletontype#BONE) |
| [`Sphere`](/3d/python-net/aspose.threed.entities/sphere) | Parameterized sphere. |
| [`SweptAreaSolid`](/3d/python-net/aspose.threed.entities/sweptareasolid) | A [`SweptAreaSolid`](/3d/python-net/aspose.threed.entities/sweptareasolid) constructs a geometry by sweeping a profile along a directrix. |
| [`Torus`](/3d/python-net/aspose.threed.entities/torus) | Parameterized torus. |
| [`TransformedCurve`](/3d/python-net/aspose.threed.entities/transformedcurve) | A [`TransformedCurve`](/3d/python-net/aspose.threed.entities/transformedcurve) gives a curve a placement by using a transformation matrix.
<br/>This allows to perform a transformation inside a [`TrimmedCurve`](/3d/python-net/aspose.threed.entities/trimmedcurve) or [`CompositeCurve`](/3d/python-net/aspose.threed.entities/compositecurve). |
| [`TriMesh`](/3d/python-net/aspose.threed.entities/trimesh) | A TriMesh contains raw data that can be used by GPU directly.
<br/>This class is a utility to help to construct a mesh that only contains per-vertex data. |
| [`TrimmedCurve`](/3d/python-net/aspose.threed.entities/trimmedcurve) | A bounded curve that trimmed the basis curve at both ends. |
| [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) | Base class of vertex elements.
<br/>A vertex element type is identified by VertexElementType. 
<br/>A VertexElement describes how the vertex element is mapped to a geometry surface and how the mapping information is arranged in memory. 
<br/>A VertexElement contains Normals, UVs or other kind of information. |
| [`VertexElementBinormal`](/3d/python-net/aspose.threed.entities/vertexelementbinormal) | Defines the binormal vectors for specified components. |
| [`VertexElementDoublesTemplate`](/3d/python-net/aspose.threed.entities/vertexelementdoublestemplate) | A helper class for defining concrete [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) implementations. |
| [`VertexElementEdgeCrease`](/3d/python-net/aspose.threed.entities/vertexelementedgecrease) | Defines the edge crease for specified components |
| [`VertexElementHole`](/3d/python-net/aspose.threed.entities/vertexelementhole) | Defines if specified polygon is hole |
| [`VertexElementIntsTemplate`](/3d/python-net/aspose.threed.entities/vertexelementintstemplate) | A helper class for defining concrete [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) implementations. |
| [`VertexElementMaterial`](/3d/python-net/aspose.threed.entities/vertexelementmaterial) | Defines material index for specified components.
<br/>
<br/>A node can have multiple materials, the [`VertexElementMaterial`](/3d/python-net/aspose.threed.entities/vertexelementmaterial) is used to render different part of the geometry in different materials. |
| [`VertexElementNormal`](/3d/python-net/aspose.threed.entities/vertexelementnormal) | Defines normal vectors for specified components. |
| [`VertexElementPolygonGroup`](/3d/python-net/aspose.threed.entities/vertexelementpolygongroup) | Defines polygon group for specified components to group related polygons together. |
| [`VertexElementSmoothingGroup`](/3d/python-net/aspose.threed.entities/vertexelementsmoothinggroup) | A smoothing group is a group of polygons in a polygon mesh which should appear to form a smooth surface.
<br/>Some early 3d modeling software like 3D studio max for DOS used smoothing group to void storing normal vector for each mesh vertex. |
| [`VertexElementSpecular`](/3d/python-net/aspose.threed.entities/vertexelementspecular) | Defines specular color for specified components. |
| [`VertexElementTangent`](/3d/python-net/aspose.threed.entities/vertexelementtangent) | Defines tangent vectors for specified components. |
| [`VertexElementUV`](/3d/python-net/aspose.threed.entities/vertexelementuv) | Defines the UV coordinates for specified components.
<br/>A geometry can have multiple [`VertexElementUV`](/3d/python-net/aspose.threed.entities/vertexelementuv) elements, and each one have different [`TextureMapping`](/3d/python-net/aspose.threed.entities/texturemapping)s. |
| [`VertexElementUserData`](/3d/python-net/aspose.threed.entities/vertexelementuserdata) | Defines custom user data for specified components.
<br/>Usually it's application-specific data for special purpose. |
| [`VertexElementVector4`](/3d/python-net/aspose.threed.entities/vertexelementvector4) | A helper class for defining concrete [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) implementations. |
| [`VertexElementVertexColor`](/3d/python-net/aspose.threed.entities/vertexelementvertexcolor) | Defines the vertex color for specified components |
| [`VertexElementVertexCrease`](/3d/python-net/aspose.threed.entities/vertexelementvertexcrease) | Defines the vertex crease for specified components |
| [`VertexElementVisibility`](/3d/python-net/aspose.threed.entities/vertexelementvisibility) | Defines if specified components is visible |
| [`VertexElementWeight`](/3d/python-net/aspose.threed.entities/vertexelementweight) | Defines blend weight for specified components. |


### Enumerations
| Enumeration | Description |
| :- | :- |
| [`ApertureMode`](/3d/python-net/aspose.threed.entities/aperturemode) | Camera aperture modes.
<br/>The aperture mode determines which values drive the camera aperture. 
<br/>If the aperture mode is HorizAndVert, Horizontal, or Vertical, then the field of view is used. 
<br/>If the aperture mode is FocalLength, then the focal length is used. |
| [`BooleanOperation`](/3d/python-net/aspose.threed.entities/booleanoperation) | Mesh's Boolean operation |
| [`CurveDimension`](/3d/python-net/aspose.threed.entities/curvedimension) | The dimension of the curves. |
| [`LightType`](/3d/python-net/aspose.threed.entities/lighttype) | Light types. |
| [`MappingMode`](/3d/python-net/aspose.threed.entities/mappingmode) | Determines how the element is mapped to a surface. 
<br/>The [`MappingMode`](/3d/python-net/aspose.threed.entities/mappingmode) defined how [`VertexElement`](/3d/python-net/aspose.threed.entities/vertexelement) is mapped to the surface of geometry. |
| [`NurbsType`](/3d/python-net/aspose.threed.entities/nurbstype) | NURBS types. |
| [`PatchDirectionType`](/3d/python-net/aspose.threed.entities/patchdirectiontype) | Patch direction's types. |
| [`ProjectionType`](/3d/python-net/aspose.threed.entities/projectiontype) | Camera's projection types. |
| [`ReferenceMode`](/3d/python-net/aspose.threed.entities/referencemode) | [`ReferenceMode`](/3d/python-net/aspose.threed.entities/referencemode) defines how mapping information is stored and referenced by. |
| [`RotationMode`](/3d/python-net/aspose.threed.entities/rotationmode) | The frustum's rotation mode |
| [`SkeletonType`](/3d/python-net/aspose.threed.entities/skeletontype) | [`Skeleton`](/3d/python-net/aspose.threed.entities/skeleton)'s types. |
| [`SplitMeshPolicy`](/3d/python-net/aspose.threed.entities/splitmeshpolicy) | Share vertex/control point data between sub-meshes or each sub-mesh has its own compacted data. |
| [`TextureMapping`](/3d/python-net/aspose.threed.entities/texturemapping) | The texture mapping type for [`VertexElementUV`](/3d/python-net/aspose.threed.entities/vertexelementuv)
<br/>Describes which kind of texture mapping is used. |
| [`VertexElementType`](/3d/python-net/aspose.threed.entities/vertexelementtype) | The type of the vertex element, defined how it will be used in modeling. |