Package com.jme3.bullet.collision.shapes

Class HeightfieldCollisionShape

java.lang.Object

com.jme3.bullet.NativePhysicsObject

com.jme3.bullet.collision.shapes.CollisionShape

com.jme3.bullet.collision.shapes.HeightfieldCollisionShape

All Implemented Interfaces:

Comparable<NativePhysicsObject>

public class HeightfieldCollisionShape
extends CollisionShape

A collision shape for terrain defined by a matrix of height values, based on Bullet's btHeightfieldTerrainShape. Should be more efficient than an equivalent MeshCollisionShape. Not for use in dynamic bodies. Collisions between HeightfieldCollisionShape, MeshCollisionShape, and PlaneCollisionShape objects are never detected.

Field Summary

Fields

Modifier and Type	Field	Description
static final Logger	logger2	message logger for this class

Fields inherited from class com.jme3.bullet.collision.shapes.CollisionShape

enableContactFilter, logger, margin, scale

Fields inherited from class com.jme3.bullet.NativePhysicsObject

loggerN

Constructor Summary

Constructors

Constructor	Description
HeightfieldCollisionShape(float[] heightmap)	Instantiate a square shape for the specified height map.
HeightfieldCollisionShape(float[] heightmap, Vector3f scale)	Instantiate a square shape for the specified height map and scale vector.
HeightfieldCollisionShape(int stickLength, int stickWidth, float[] heightmap, Vector3f scale, int upAxis, boolean flipQuadEdges, boolean flipTriangleWinding, boolean useDiamond, boolean useZigzag)	Instantiate a rectangular shape for the specified parameters.

Method Summary

Modifier and Type	Method	Description
int	countColumns()	Count how many columns are in the heightfield.
int	countMeshVertices()	Count how many data points are in the heightfield.
int	countRows()	Count how many rows are in the heightfield.
CollisionShape	toSplittableShape()	Approximate this shape with a splittable shape.
int	upAxis()	Return the index of the height axis.

Methods inherited from class com.jme3.bullet.collision.shapes.CollisionShape

aabbCenter, boundingBox, boundingBox, canScale, canSplit, getDefaultMargin, getMargin, getScale, getScaleDp, getShapeType, getShapeType, isConcave, isContactFilterEnabled, isConvex, isInfinite, isNonMoving, isPolyhedral, maxRadius, nativeMargin, recalculateAabb, scaledVolume, setContactFilterEnabled, setDefaultMargin, setMargin, setNativeId, setScale, setScale, setUserIndex, setUserIndex2, toString, updateScale, userIndex, userIndex2

Methods inherited from class com.jme3.bullet.NativePhysicsObject

compareTo, countTrackers, dumpTrackers, equals, freeUnusedObjects, hasAssignedNativeObject, hashCode, nativeId, reassignNativeId, setNativeIdNotTracked, unassignNativeObject

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

logger2

public static final Logger logger2

message logger for this class

Constructor Details

HeightfieldCollisionShape

public HeightfieldCollisionShape(float[] heightmap)

Instantiate a square shape for the specified height map.

Parameters:

heightmap - (not null, length≥4, length a perfect square, unaffected)

HeightfieldCollisionShape

public HeightfieldCollisionShape(float[] heightmap,
 Vector3f scale)

Instantiate a square shape for the specified height map and scale vector.

Parameters:

heightmap - (not null, length≥4, length a perfect square, unaffected)

scale - the desired scale factor for each local axis (not null, no negative component, unaffected, default=(1,1,1))

HeightfieldCollisionShape

public HeightfieldCollisionShape(int stickLength,
 int stickWidth,
 float[] heightmap,
 Vector3f scale,
 int upAxis,
 boolean flipQuadEdges,
 boolean flipTriangleWinding,
 boolean useDiamond,
 boolean useZigzag)

Instantiate a rectangular shape for the specified parameters.

Parameters:

stickLength - the number of rows in the heightfield (>1)

stickWidth - number of columns in the heightfield (>1)

heightmap - (not null, length≥stickLength*stickWidth, unaffected)

scale - the desired scale factor for each local axis (not null, no negative component, unaffected, default=(1,1,1))

upAxis - the height-axis index (0→X, 1→Y, 2→Z, default=1)

flipQuadEdges - true→reverse the direction of the first diagonal (default=true)

flipTriangleWinding - true→left-hand winding of triangles (default=false)

useDiamond - true→diagonals alternate on both horizontal axes (default=false)

useZigzag - true→diagonals alternate on one horizontal axis (default=false)

Method Details

countColumns

public int countColumns()

Count how many columns are in the heightfield.

Returns:

the count (≥2)

countMeshVertices

public int countMeshVertices()

Count how many data points are in the heightfield.

Returns:

the count (≥4)

countRows

public int countRows()

Count how many rows are in the heightfield.

Returns:

the count (≥2)

upAxis

public int upAxis()

Return the index of the height axis.

Returns:

the axis index: 0→X, 1→Y, 2→Z

toSplittableShape

public CollisionShape toSplittableShape()

Approximate this shape with a splittable shape.

Overrides:

toSplittableShape in class CollisionShape

Returns:

a new splittable shape