/// <summary>
/// Create the collision height map.
/// </summary>
/// <param name="heightData">Height map data (should be defined as byte[size.X * size.Y * 4]).</param>
/// <param name="size">Tilemap size (Y is actually Z axis).</param>
/// <param name="scale">Scale tiles width and depth.</param>
/// <param name="minHeight">Min height value.</param>
/// <param name="maxHeight">Max height value.</param>
/// <param name="heightScale">Optional height scale.</param>
/// <param name="upIndex">Up index.</param>
/// <param name="useDiamondSubdivision">Divide the tiles into diamond shapes for more accurare results.</param>
private void Build(float[] heightData, Point size, Vector2 scale, float minHeight = 0f, float maxHeight = 100f, float heightScale = 1f, int upIndex = 1, bool useDiamondSubdivision = false)
{
// get int ptr for data bytes
_rawDataHandle = System.Runtime.InteropServices.GCHandle.Alloc(heightData, System.Runtime.InteropServices.GCHandleType.Pinned);
var address = _rawDataHandle.AddrOfPinnedObject();
// create heightmap
var heightmap = new BulletSharp.HeightfieldTerrainShape(size.X, size.Y, address,
heightScale, minHeight, maxHeight, upIndex,
BulletSharp.PhyScalarType.Single, false);
// set transform and diamond subdivision
heightmap.SetUseDiamondSubdivision(useDiamondSubdivision);
heightmap.LocalScaling = ToBullet.Vector(new Vector3(scale.X, 1, scale.Y));
// set shape
_shape = heightmap;
}
internal HeightfieldColliderShape
(
int heightStickWidth,
int heightStickLength,
HeightfieldTypes heightType,
object dynamicFieldData,
float heightScale,
float minHeight,
float maxHeight,
bool flipQuadEdges
)
{
Type = ColliderShapeTypes.Heightfield;
Is2D = false;
HeightStickWidth = heightStickWidth;
HeightStickLength = heightStickLength;
HeightType = heightType;
HeightScale = heightScale;
MinHeight = minHeight;
MaxHeight = maxHeight;
cachedScaling = Vector3.One;
switch (HeightType)
{
case HeightfieldTypes.Short:
ShortArray = dynamicFieldData as UnmanagedArray <short>;
InternalShape = new BulletSharp.HeightfieldTerrainShape(HeightStickWidth, HeightStickLength, ShortArray.Pointer, HeightScale, MinHeight, MaxHeight, 1, BulletSharp.PhyScalarType.Int16, flipQuadEdges)
{
LocalScaling = cachedScaling,
};
break;
case HeightfieldTypes.Byte:
ByteArray = dynamicFieldData as UnmanagedArray <byte>;
InternalShape = new BulletSharp.HeightfieldTerrainShape(HeightStickWidth, HeightStickLength, ByteArray.Pointer, HeightScale, MinHeight, MaxHeight, 1, BulletSharp.PhyScalarType.Byte, flipQuadEdges)
{
LocalScaling = cachedScaling,
};
break;
case HeightfieldTypes.Float:
FloatArray = dynamicFieldData as UnmanagedArray <float>;
InternalShape = new BulletSharp.HeightfieldTerrainShape(HeightStickWidth, HeightStickLength, FloatArray.Pointer, HeightScale, MinHeight, MaxHeight, 1, BulletSharp.PhyScalarType.Single, flipQuadEdges)
{
LocalScaling = cachedScaling,
};
break;
}
var halfRange = (MaxHeight - MinHeight) * 0.5f;
var offset = -(MinHeight + halfRange);
DebugPrimitiveMatrix = Matrix.Translation(new Vector3(0, offset, 0)) * Matrix.Scaling(Vector3.One * DebugScaling);
}
