Class MappedFloatArray

src/main/java/field/linalg/MappedFloatArray.java:12–109

Utility class for Mapping arrays of Floats

 * Utility class for Mapping arrays of Floats
 */
public class MappedFloatArray {


	private final RandomAccessFile raf;
	private final FloatBuffer fbuffer;
	private final ByteBuffer buffer;
	private final DoubleBuffer dbuffer;
	private final IntBuffer ibuffer;
	int preferredDimension = 3;

	public MappedFloatArray(String filename) throws IOException {
		raf = new RandomAccessFile(filename, "r");

		buffer = raf.getChannel()
			    .map(FileChannel.MapMode.READ_ONLY, 0, raf.length())
			    .order(ByteOrder.nativeOrder());
		fbuffer = buffer.asFloatBuffer();
		dbuffer = buffer.asDoubleBuffer();
		ibuffer = buffer.asIntBuffer();
	}

	public MappedFloatArray setPreferredDimension(int p) {
		preferredDimension = p;
		return this;
	}

	public Vec3 get3f(int index) {
		return new Vec3(fbuffer.get(index), fbuffer.get(index + 1), fbuffer.get(index + 2));
	}

	public int length3f() {
		return fbuffer.limit() / 3;
	}

	public Vec2 get2f(int index) {
		return new Vec2(fbuffer.get(index), fbuffer.get(index + 1));
	}

	public int length2f() {
		return fbuffer.limit() / 2;
	}

	public float get1f(int index) {
		return fbuffer.get(index);
	}

	public int length1f() {
		return fbuffer.limit();
	}

	public int length() {
		switch (preferredDimension) {
			case 1:
				return length1f();
			case 2:
				return length2f();
			case 3:
				return length3f();