Class BoundingBoxHelper
The BoundingBoxHelper class contains functions for getting geometric info from the non-axis-aligned bounding box of a GameObject. These functions can be used to align another object to the center of a certain face or the center of an edge of a face... etc. The BoundingBoxHelper static function can be used for a one time calculation. The dynamic functions can be used to obtain boundingcube info on an object's Update loop. Operations are minimized in the dynamic use scenario.
Inherited Members
Namespace: Microsoft.MixedReality.Toolkit.UI
Assembly: cs.temp.dll.dll
Syntax
public class BoundingBoxHelperMethods
GetFaceBottomCentroid(Int32)
Get the center of the bottom edge of a face of the bounding box determined by index
Declaration
public Vector3 GetFaceBottomCentroid(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | parameter indicating which face is used. 0-5 |
Returns
| Type | Description |
|---|---|
| Vector3 | a vector representing the bottom most edge center of the face |
GetFaceCentroid(Int32)
This function returns the centroid of a face of the bounding cube of an object specified by the index parameter;
Declaration
public Vector3 GetFaceCentroid(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | an index into the list of faces of a boundingcube. 0-5 |
Returns
| Type | Description |
|---|---|
| Vector3 |
GetFaceCorners(Int32)
This function returns the four corners of a face of a bounding cube specified by index.
Declaration
public Vector3[] GetFaceCorners(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | the index of the face of the bounding cube. 0-5 |
Returns
| Type | Description |
|---|---|
| Vector3[] | an array of 4 vectors |
GetFaceEdgeMidpoints(Int32)
This function returns the midpoints of each of the edges of the face of the bounding box
Declaration
public Vector3[] GetFaceEdgeMidpoints(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | the index of the face of the bounding cube- 0-5 |
Returns
| Type | Description |
|---|---|
| Vector3[] | four Vector3 points |
GetFaceIndices(Int32)
this function gets the indices of the bounding cube corners that make up a face.
Declaration
public int[] GetFaceIndices(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | the face index of the bounding cube 0-5 |
Returns
| Type | Description |
|---|---|
| Int32[] | an array of four integer indices |
GetFaceNormal(Int32)
Get the normal of the face of the bounding cube specified by index
Declaration
public Vector3 GetFaceNormal(int index)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index | the index of the face of the bounding cube 0-5 |
Returns
| Type | Description |
|---|---|
| Vector3 | a vector3 representing the face normal |
GetIndexOfForwardFace(Vector3)
This function gets the index of the face of the bounding cube that is most facing the lookAtPoint. This could be the headPosition or camera position if the face that was facing the view is desired.
Declaration
public int GetIndexOfForwardFace(Vector3 lookAtPoint)Parameters
| Type | Name | Description |
|---|---|---|
| Vector3 | lookAtPoint | the world coordinate to test which face is desired |
Returns
| Type | Description |
|---|---|
| Int32 | an integer representing the index of the bounding box faces |
GetRawBBCorners(BoundingBox)
This function calculates the untransformed bounding box corner points of a GameObject.
Declaration
public void GetRawBBCorners(BoundingBox boundingBox)Parameters
| Type | Name | Description |
|---|---|---|
| BoundingBox | boundingBox |
GetUntransformedCornersFromObject(BoxCollider, List<Vector3>)
static function that performs one-time non-persistent calculation of corner points of given bounds without taking world transform into account.
Declaration
public static void GetUntransformedCornersFromObject(BoxCollider targetBounds, List<Vector3> boundsPoints)Parameters
| Type | Name | Description |
|---|---|---|
| BoxCollider | targetBounds | the bounds the corner points are to be calculated from |
| List<Vector3> | boundsPoints | the array of 8 corner points that will be filled |
UpdateNonAABoundingBoxCornerPositions(BoundingBox, List<Vector3>)
Objects that align to an target's bounding box can call this function in the object's UpdateLoop to get current bound points;
Declaration
public void UpdateNonAABoundingBoxCornerPositions(BoundingBox boundingBox, List<Vector3> boundsPoints)Parameters
| Type | Name | Description |
|---|---|---|
| BoundingBox | boundingBox | |
| List<Vector3> | boundsPoints |
UpdateNonAABoundsCornerPositions(BoxCollider, List<Vector3>)
Returns the corner points of the given collider bounds
Declaration
public void UpdateNonAABoundsCornerPositions(BoxCollider colliderBounds, List<Vector3> boundsPoints)Parameters
| Type | Name | Description |
|---|---|---|
| BoxCollider | colliderBounds | The collider bounds the corner points are calculated from |
| List<Vector3> | boundsPoints | The corner points calculated from the collider points |