## Geometry.GetBoundingSphere

### Introduced

v5.0

### Description

Returns the center and radius of a bounding sphere of the Geometry object. If an input transform is specified, it is applied to the Geometry before the bounding sphere is calculated.

### C# Syntax

    Object Geometry.GetBoundingSphere( siVolumeCenterMethod in_centerMethod, Object in_pXfoObjectToBSphereSpace );

### Scripting Syntax

    oArray = Geometry.GetBoundingSphere( [Type], [Transform] );

### Return Value

1-dimensional Array containing four values: the X, Y and Z coordinates of the center, followed by the radius of the sphere.

### Parameters

Parameter | Type | Description
--- | --- | ---
Type | siVolumeCenterMethod | The technique used to calculate the center of the bounding sphere Default Value: siVolumeCenterMethodBBoxCenter
Transform | SITransformation | Transform to be applied to the Geometry before the bounding sphere is calculated

### Examples

#### 1. JScript Example

    /*

    	Example using no input transform and default center calculation method

    */

    // Create and move (rotate and translate) a torus

    NewScene( null, false ) ;

    var oTorus = ActiveSceneRoot.AddGeometry( "Torus", "MeshSurface" ) ;

    SelectObj( oTorus ) ;

    Rotate(null, 45, 0, 0, siAbsolute, siPivot, siObj, siX, null, null, null, null, null, null, null, 0, null) ;

    Translate(null, 3, 2, 1, siAbsolute, siPivot, siObj, siX, null, null, null, null, null, null, null, null, null, 0, null) ;

    // Find the bounding sphere

    var vba = new VBArray( oTorus.ActivePrimitive.Geometry.GetBoundingSphere() ) ;

    var jsa = vba.toArray() ;

    // Report the (local) center and radius

    Application.LogMessage( "center:"  + jsa[0] + ", " + jsa[1] + ", " + jsa[2] ) ;

    Application.LogMessage( "radius:" + jsa[3] ) ;

#### 2. JScript Example

    /*

    	Example using an input transform to preserve scaling and a different center

    	calculation method

    */

    // Create and move (rotate and translate) a torus

    NewScene( null, false ) ;

    var oTorus = ActiveSceneRoot.AddGeometry( "Torus", "MeshSurface" ) ;

    SelectObj( oTorus ) ;

    Scale(null, 0.5, 0.5, 1, siAbsolute, siGlobal, siObj, siY, null, null, null, null, null, null, null, 0, null) ;

    oTransform = oTorus.Kinematics.Local.Transform ;

    // Find the bounding sphere

    var vba = new VBArray( oTorus.ActivePrimitive.Geometry.GetBoundingSphere( siVolumeCenterMethodCOG, oTransform) ) ;

    var jsa = vba.toArray() ;

    // Report the (local) center and radius

    Application.LogMessage( "center:" + jsa[0] + ", " + jsa[1] + ", " + jsa[2] ) ;

    Application.LogMessage( "radius:" + jsa[3] ) ;

    // Build a sphere that shows the bounding volume

    var oSphere = ActiveSceneRoot.AddPrimitive("Sphere" ) ;

    oSphere.radius = jsa[3] ;

    oSphere.PosX = jsa[0] ;

    oSphere.PosY = jsa[1] ;

    oSphere.PosZ = jsa[2] ;

### See Also

Geometry.GetBoundingBox Geometry.GetBoundingCapsule X3DObject.GetBoundingBox GetBBox