Example usage for java.nio ByteBuffer asFloatBuffer

Introduction

In this page you can find the example usage for java.nio ByteBuffer asFloatBuffer.

Prototype

public abstract FloatBuffer asFloatBuffer();

Source Link

Document

Returns a float buffer which is based on the remaining content of this byte buffer.

Usage

From source file:Main.java

public static FloatBuffer makeFloatBuffer(int length) {
    final int floatSize = Float.SIZE / 8;
    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(length * floatSize);
    byteBuffer.order(ByteOrder.nativeOrder());
    FloatBuffer floatBuffer = byteBuffer.asFloatBuffer();
    floatBuffer.position(0);//from  w w w.  ja va  2  s.  co  m
    return floatBuffer;
}

From source file:Main.java

public static FloatBuffer makeFloatBuffer(float[] array) {
    final int floatSize = Float.SIZE / 8;
    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length * floatSize);
    byteBuffer.order(ByteOrder.nativeOrder());
    FloatBuffer floatBuffer = byteBuffer.asFloatBuffer();
    floatBuffer.put(array);//w w  w  .  java  2 s .c om
    floatBuffer.position(0);
    return floatBuffer;
}

From source file:org.bimserver.utils.BinUtils.java

public static byte[] floatToByteArray(Float inFloat) {
    byte[] bArray = new byte[4];
    ByteBuffer bBuffer = ByteBuffer.wrap(bArray);
    FloatBuffer lBuffer = bBuffer.asFloatBuffer();
    lBuffer.put(inFloat);//from   w  w  w.  java2s  . c  o m
    return bArray;
}

From source file:de.ailis.threedee.utils.BufferUtils.java

/**
 * Creates a direct float buffer with native byte order.
 *
 * @param size//from   w  w  w.  ja v a 2 s. com
 *            The data
 * @return The created direct float buffer
 */

public static FloatBuffer createDirectFloatBuffer(final int size) {
    final ByteBuffer tmp = ByteBuffer.allocateDirect(size * FLOAT_BYTES);
    tmp.order(ByteOrder.nativeOrder());
    return tmp.asFloatBuffer();
}

From source file:de.ailis.threedee.utils.BufferUtils.java

/**
 * Converts the specified float buffer to native endian and returns this new
 * buffer. If buffer is already in correct endian format then it is returned
 * right away./*from  w w w  .  j a  v  a 2s.c  o  m*/
 *
 * @param buffer
 *            The float buffer to convert
 * @return The converted float buffer or the source buffer if no conversion
 *         is needed
 */

public static FloatBuffer convertToNativeEndian(final FloatBuffer buffer) {
    if (buffer.order() == ByteOrder.nativeOrder())
        return buffer;

    if (log.isTraceEnabled())
        log.trace("Converting endianess of " + buffer.capacity() + " floats");

    final ByteBuffer bytes = ByteBuffer.allocateDirect(buffer.capacity());
    bytes.order(ByteOrder.nativeOrder());
    final FloatBuffer floats = bytes.asFloatBuffer();
    floats.put(buffer).rewind();
    return floats;
}

From source file:org.bimserver.collada.SupportFunctions.java

public static void printMatrix(PrintWriter out, GeometryInfo geometryInfo) {
    ByteBuffer transformation = ByteBuffer.wrap(geometryInfo.getTransformation());
    transformation.order(ByteOrder.LITTLE_ENDIAN);
    FloatBuffer floatBuffer = transformation.asFloatBuffer();
    // Prepare to create the transform matrix.
    float[] matrix = new float[16];
    // Add the first 16 values of the buffer.
    for (int i = 0; i < matrix.length; i++)
        matrix[i] = floatBuffer.get();/*from w  ww . j  a  v  a2  s. c o  m*/
    // Switch from column-major (x.x ... x.y ... x.z ... 0 ...) to row-major orientation (x.x x.y x.z 0 ...)?
    matrix = Matrix.changeOrientation(matrix);
    // List all 16 elements of the matrix as a single space-delimited String object.
    if (!matrix.equals(identity))
        out.println("    <matrix>" + floatArrayToSpaceDelimitedString(matrix) + "</matrix>");
}

From source file:org.mrgeo.data.raster.RasterWritable.java

private static byte[] rasterToBytes(final Raster raster) {
    final int datatype = raster.getTransferType();

    byte[] pixels;

    final Object elements = raster.getDataElements(raster.getMinX(), raster.getMinY(), raster.getWidth(),
            raster.getHeight(), null);/* w ww  .  j a v  a  2 s  .  co m*/

    switch (datatype) {
    case DataBuffer.TYPE_BYTE: {
        pixels = (byte[]) elements;
        break;
    }
    case DataBuffer.TYPE_FLOAT: {
        final float[] floatElements = (float[]) elements;

        pixels = new byte[floatElements.length * RasterUtils.FLOAT_BYTES];

        final ByteBuffer bytebuff = ByteBuffer.wrap(pixels);
        final FloatBuffer floatbuff = bytebuff.asFloatBuffer();
        floatbuff.put(floatElements);

        break;
    }
    case DataBuffer.TYPE_DOUBLE: {
        final double[] doubleElements = (double[]) elements;

        pixels = new byte[doubleElements.length * RasterUtils.DOUBLE_BYTES];

        final ByteBuffer bytebuff = ByteBuffer.wrap(pixels);
        final DoubleBuffer doubleBuff = bytebuff.asDoubleBuffer();
        doubleBuff.put(doubleElements);

        break;
    }
    case DataBuffer.TYPE_INT: {
        final int[] intElements = (int[]) elements;

        pixels = new byte[intElements.length * RasterUtils.INT_BYTES];

        final ByteBuffer bytebuff = ByteBuffer.wrap(pixels);
        final IntBuffer intBuff = bytebuff.asIntBuffer();
        intBuff.put(intElements);

        break;
    }
    case DataBuffer.TYPE_SHORT:
    case DataBuffer.TYPE_USHORT: {
        final short[] shortElements = (short[]) elements;

        pixels = new byte[shortElements.length * RasterUtils.SHORT_BYTES];

        final ByteBuffer bytebuff = ByteBuffer.wrap(pixels);
        final ShortBuffer shortbuff = bytebuff.asShortBuffer();
        shortbuff.put(shortElements);

        break;
    }
    default:
        throw new RasterWritableException("Error trying to append raster.  Bad raster data type");
    }

    return pixels;
}

From source file:Triangle.java

public Triangle() {
    int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
    int fragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);
    mProgram = GLES20.glCreateProgram();
    GLES20.glAttachShader(mProgram, vertexShader);
    GLES20.glAttachShader(mProgram, fragmentShader);
    GLES20.glLinkProgram(mProgram);/*  w ww  .  jav a2  s .  c o  m*/

    ByteBuffer bb = ByteBuffer.allocateDirect(triangleCoords.length * 4);
    bb.order(ByteOrder.nativeOrder());

    vertexBuffer = bb.asFloatBuffer();
    vertexBuffer.put(triangleCoords);
    vertexBuffer.position(0);
}

From source file:com.metamx.collections.spatial.search.RectangularBound.java

@Override
public byte[] getCacheKey() {
    ByteBuffer minCoordsBuffer = ByteBuffer.allocate(minCoords.length * Floats.BYTES);
    minCoordsBuffer.asFloatBuffer().put(minCoords);
    final byte[] minCoordsCacheKey = minCoordsBuffer.array();

    ByteBuffer maxCoordsBuffer = ByteBuffer.allocate(maxCoords.length * Floats.BYTES);
    maxCoordsBuffer.asFloatBuffer().put(maxCoords);
    final byte[] maxCoordsCacheKey = maxCoordsBuffer.array();

    final ByteBuffer cacheKey = ByteBuffer.allocate(1 + minCoordsCacheKey.length + maxCoordsCacheKey.length)
            .put(minCoordsCacheKey).put(maxCoordsCacheKey).put(CACHE_TYPE_ID);
    return cacheKey.array();
}

From source file:io.druid.query.aggregation.HistogramAggregatorFactory.java

@Override
public byte[] getCacheKey() {
    byte[] fieldNameBytes = StringUtils.toUtf8(fieldName);
    ByteBuffer buf = ByteBuffer.allocate(1 + fieldNameBytes.length + Floats.BYTES * breaks.length)
            .put(CACHE_TYPE_ID).put(fieldNameBytes).put((byte) 0xFF);
    buf.asFloatBuffer().put(breaks);

    return buf.array();
}