/// <summary>
/// 判断包围盒是否被相机裁剪
/// </summary>
/// <param name="bounds"></param>
/// <param name="camera"></param>
/// <returns></returns>
public static bool IsBoundsInCamera(this Bounds bounds, Camera camera)
{
Matrix4x4 matrix = camera.projectionMatrix * camera.worldToCameraMatrix;
int code =
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
if (code != 0)
{
return(false);
}
return(true);
}
protected virtual int CalculateCullCode(Vector4 position, Matrix4x4 matrix)
{
return(MatrixEx.ComputeOutCode(position, matrix));
}
