Java FloatBuffer.put方法代碼示例

import java.nio.FloatBuffer; //導入方法依賴的package包/類
/**
     * <code>fillFloatBuffer</code> fills a FloatBuffer object with the matrix
     * data.
     * 
     * @param fb
     *            the buffer to fill, starting at current position. Must have
     *            room for 16 more floats.
     * @param columnMajor
     *            if true, this buffer should be filled with column major data,
     *            otherwise it will be filled row major.
     * @return matrix data as a FloatBuffer. (position is advanced by 16 and any
     *         limit set is not changed).
     */
    public FloatBuffer fillFloatBuffer(FloatBuffer fb, boolean columnMajor) {
//        if (columnMajor) {
//            fb.put(m00).put(m10).put(m20).put(m30);
//            fb.put(m01).put(m11).put(m21).put(m31);
//            fb.put(m02).put(m12).put(m22).put(m32);
//            fb.put(m03).put(m13).put(m23).put(m33);
//        } else {
//            fb.put(m00).put(m01).put(m02).put(m03);
//            fb.put(m10).put(m11).put(m12).put(m13);
//            fb.put(m20).put(m21).put(m22).put(m23);
//            fb.put(m30).put(m31).put(m32).put(m33);
//        }

        TempVars vars = TempVars.get();


        fillFloatArray(vars.matrixWrite, columnMajor);
        fb.put(vars.matrixWrite, 0, 16);

        vars.release();
        
        fb.rewind();

        return fb;
    }
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
/**
 * Creates a new FloatBuffer with the same contents as the given
 * FloatBuffer. The new FloatBuffer is seperate from the old one and changes
 * are not reflected across. If you want to reflect changes, consider using
 * Buffer.duplicate().
 * 
 * @param buf
 *            the FloatBuffer to copy
 * @return the copy
 */
public static FloatBuffer clone(FloatBuffer buf) {
    if (buf == null) {
        return null;
    }
    buf.rewind();

    FloatBuffer copy;
    if (isDirect(buf)) {
        copy = createFloatBuffer(buf.limit());
    } else {
        copy = FloatBuffer.allocate(buf.limit());
    }
    copy.put(buf);

    return copy;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static FloatBuffer CreateFlippedBuffer(Vertex[] vertices)
{
	FloatBuffer buffer = CreateFloatBuffer(vertices.length * Vertex.SIZE);
	
	for(int i = 0; i < vertices.length; i++)
	{
		buffer.put(vertices[i].GetPos().GetX());
		buffer.put(vertices[i].GetPos().GetY());
		buffer.put(vertices[i].GetPos().GetZ());
		buffer.put(vertices[i].GetTexCoord().GetX());
		buffer.put(vertices[i].GetTexCoord().GetY());
		buffer.put(vertices[i].GetNormal().GetX());
		buffer.put(vertices[i].GetNormal().GetY());
		buffer.put(vertices[i].GetNormal().GetZ());
		buffer.put(vertices[i].GetTangent().GetX());
		buffer.put(vertices[i].GetTangent().GetY());
		buffer.put(vertices[i].GetTangent().GetZ());
	}
	
	buffer.flip();
	
	return buffer;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public FloatBuffer floatBufferUtil(float[] arr) {
	// 初始化ByteBuffer，長度為arr數組的長度*4，因為一個int占4個字節
	ByteBuffer qbb = ByteBuffer.allocateDirect(arr.length * 4);
	// 數組排列用nativeOrder
	qbb.order(ByteOrder.nativeOrder());
	FloatBuffer mBuffer = qbb.asFloatBuffer();
	mBuffer.put(arr);
	mBuffer.position(0);
	return mBuffer;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
/**
 * Allocates a direct float buffer, and populates it with the float array data.
 */
public static FloatBuffer createFloatBuffer(float[] coords) {
    // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
    ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * SIZEOF_FLOAT);
    bb.order(ByteOrder.nativeOrder());
    FloatBuffer fb = bb.asFloatBuffer();
    fb.put(coords);
    fb.position(0);
    return fb;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
@Test
public void testGetFloatInt() {
  ByteBuffer bb = ByteBuffer.allocate(20);
  FloatBuffer fb = bb.asFloatBuffer();
  fb.put(1.1f);
  fb.put(2.2f);
  fb.put(3.3f);
  fb.put(4.4f);
  fb.put(5.5f);
  byte[] bytes = bb.array();
  ByteSource bs = createByteSource(bytes);
  bs.position(3);
  float f = bs.getFloat(0);
  assertEquals(1.1f, f, 0.0001);
  assertEquals(3, bs.position());
  f = bs.getFloat(4);
  assertEquals(2.2f, f, 0.0001);
  assertEquals(3, bs.position());
  f = bs.getFloat(4 * 4);
  assertEquals(5.5f, f, 0.0001);
  assertEquals(3, bs.position());
  try {
    bs.getFloat((4 * 4) + 1);
    fail("expected IndexOutOfBoundsException");
  } catch (IndexOutOfBoundsException expected) {
  }
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static FloatBuffer createSquareVtx() {
    final float vtx[] = {
            // XYZ, UV
            -1f,  1f, 0f, 0f, 1f,
            -1f, -1f, 0f, 0f, 0f,
            1f,   1f, 0f, 1f, 1f,
            1f,  -1f, 0f, 1f, 0f,
    };
    ByteBuffer bb = ByteBuffer.allocateDirect(4 * vtx.length);
    bb.order(ByteOrder.nativeOrder());
    FloatBuffer fb = bb.asFloatBuffer();
    fb.put(vtx);
    fb.position(0);
    return fb;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static FloatBuffer quatToGlMatrix(FloatBuffer p_187418_0_, Quaternion p_187418_1_)
{
    p_187418_0_.clear();
    float f = p_187418_1_.x * p_187418_1_.x;
    float f1 = p_187418_1_.x * p_187418_1_.y;
    float f2 = p_187418_1_.x * p_187418_1_.z;
    float f3 = p_187418_1_.x * p_187418_1_.w;
    float f4 = p_187418_1_.y * p_187418_1_.y;
    float f5 = p_187418_1_.y * p_187418_1_.z;
    float f6 = p_187418_1_.y * p_187418_1_.w;
    float f7 = p_187418_1_.z * p_187418_1_.z;
    float f8 = p_187418_1_.z * p_187418_1_.w;
    p_187418_0_.put(1.0F - 2.0F * (f4 + f7));
    p_187418_0_.put(2.0F * (f1 + f8));
    p_187418_0_.put(2.0F * (f2 - f6));
    p_187418_0_.put(0.0F);
    p_187418_0_.put(2.0F * (f1 - f8));
    p_187418_0_.put(1.0F - 2.0F * (f + f7));
    p_187418_0_.put(2.0F * (f5 + f3));
    p_187418_0_.put(0.0F);
    p_187418_0_.put(2.0F * (f2 + f6));
    p_187418_0_.put(2.0F * (f5 - f3));
    p_187418_0_.put(1.0F - 2.0F * (f + f4));
    p_187418_0_.put(0.0F);
    p_187418_0_.put(0.0F);
    p_187418_0_.put(0.0F);
    p_187418_0_.put(0.0F);
    p_187418_0_.put(1.0F);
    p_187418_0_.rewind();
    return p_187418_0_;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public int renderTexture(int textureId){
	if(mGpuImageFilter == null){
		mGpuImageFilter = new GPUImageFilter(null);
		mGpuImageFilter.init();
	}


	int vertexNum = 6;

	float[] vertexCoordinate  = {1.0f, -1.0f,  0.0f,
			1.0f,  1.0f,  0.0f,
			-1.0f,  1.0f,  0.0f,
			-1.0f,  1.0f,  0.0f,
			-1.0f, -1.0f,  0.0f,
			1.0f, -1.0f,  0.0f};

	ByteBuffer bbVertices = ByteBuffer.allocateDirect(vertexNum * 3 * 4);
	bbVertices.order(ByteOrder.nativeOrder());
	FloatBuffer vertexBuf = bbVertices.asFloatBuffer();
	vertexBuf.put(vertexCoordinate);
	vertexBuf.position(0);

	float[] textureCoordinate1  = {1.0f, 1.0f,
			1.0f, 0.0f,
			0.0f, 0.0f,
			0.0f, 0.0f,
			0.0f, 1.0f,
			1.0f, 1.0f};


	ByteBuffer bbColors1 = ByteBuffer.allocateDirect(vertexNum * 2 * 4);
	bbColors1.order(ByteOrder.nativeOrder());
	FloatBuffer textureCoordinateBuf = bbColors1.asFloatBuffer();
	textureCoordinateBuf.put(textureCoordinate1);
	textureCoordinateBuf.position(0);


	mGpuImageFilter.draw(textureId,vertexBuf,textureCoordinateBuf);
	return 1;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static FloatBuffer createFloatBuffer(float[] coords) {
    // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
    ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * 4);
    bb.order(ByteOrder.nativeOrder());
    FloatBuffer fb = bb.asFloatBuffer();
    fb.put(coords);
    fb.position(0);
    return fb;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static FloatBuffer createFloatBuffer(float[] coords) {
  // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
  ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * 4);
  bb.order(ByteOrder.nativeOrder());
  FloatBuffer fb = bb.asFloatBuffer();
  fb.put(coords);
  fb.position(0);
  return fb;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
/**
 * Returns the array of texture coordinates.  The first time this is called, we generate
 * a modified version of the array from the parent class.
 * <p>
 * To avoid allocations, this returns internal state.  The caller must not modify it.
 */
@Override
public FloatBuffer getTexCoordArray() {
    if (mRecalculate) {
        //Log.v(TAG, "Scaling to " + mScale);
        FloatBuffer parentBuf = super.getTexCoordArray();
        int count = parentBuf.capacity();

        if (mTweakedTexCoordArray == null) {
            ByteBuffer bb = ByteBuffer.allocateDirect(count * SIZEOF_FLOAT);
            bb.order(ByteOrder.nativeOrder());
            mTweakedTexCoordArray = bb.asFloatBuffer();
        }

        // Texture coordinates range from 0.0 to 1.0, inclusive.  We do a simple scale
        // here, but we could get much fancier if we wanted to (say) zoom in and pan
        // around.
        FloatBuffer fb = mTweakedTexCoordArray;
        float scale = mScale;
        for (int i = 0; i < count; i++) {
            float fl = parentBuf.get(i);
            fl = ((fl - 0.5f) * scale) + 0.5f;
            fb.put(i, fl);
        }

        mRecalculate = false;
    }

    return mTweakedTexCoordArray;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public FloatBuffer getAsFloatBuffer() {
	FloatBuffer buffer = BufferUtils.createFloatBuffer(4);
	buffer.put(new float[] { col.x, col.y, col.z, a });
	buffer.flip();
	return buffer;
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
public static void storeDataInBuffer(FloatBuffer buffer, int vertexCount, float[]... data) {
	float[] interleavedData = interleaveFloatData(vertexCount, data);
	buffer.clear();
	buffer.put(interleavedData);
	buffer.flip();
}
 

import java.nio.FloatBuffer; //導入方法依賴的package包/類
private void setGeometryData() {
    // allocate vertices
    int vertCount = (circleSamples + 1) * (radialSamples + 1);
    
    //position
    FloatBuffer fpb = BufferUtils.createVector3Buffer(vertCount);
    setPosition(fpb);

    // allocate normals if requested
    FloatBuffer fnb = BufferUtils.createVector3Buffer(vertCount);
    setNormal(fnb);

    // allocate texture coordinates
    FloatBuffer ftb = BufferUtils.createVector2Buffer(vertCount);
    setTexture(ftb);

    // generate geometry
    float inverseCircleSamples = 1.0f / circleSamples;
    float inverseRadialSamples = 1.0f / radialSamples;
    int i = 0;
    // generate the cylinder itself
    Vector3f radialAxis = new Vector3f(), torusMiddle = new Vector3f(), tempNormal = new Vector3f();
    for (int circleCount = 0; circleCount < circleSamples; circleCount++) {
        // compute center point on torus circle at specified angle
        float circleFraction = circleCount * inverseCircleSamples;
        float theta = M.TWO_PI * circleFraction;
        float cosTheta = M.cos(theta);
        float sinTheta = M.sin(theta);
        radialAxis.set(cosTheta, sinTheta, 0);
        radialAxis.mult(outerRadius, torusMiddle);

        // compute slice vertices with duplication at end point
        int iSave = i;
        for (int radialCount = 0; radialCount < radialSamples; radialCount++) {
            float radialFraction = radialCount * inverseRadialSamples;
            // in [0,1)
            float phi = M.TWO_PI * radialFraction;
            float cosPhi = M.cos(phi);
            float sinPhi = M.sin(phi);
            tempNormal.set(radialAxis).multLocal(cosPhi);
            tempNormal.z += sinPhi;
            fnb.put(tempNormal.x).put(tempNormal.y).put(
                    tempNormal.z);
   
            tempNormal.multLocal(innerRadius).addLocal(torusMiddle);
            fpb.put(tempNormal.x).put(tempNormal.y).put(
                    tempNormal.z);

            ftb.put(radialFraction).put(circleFraction);
            i++;
        }

        BufferUtils.copyInternalVector3(fpb, iSave, i);
        BufferUtils.copyInternalVector3(fnb, iSave, i);

        ftb.put(1.0f).put(circleFraction);

        i++;
    }

    // duplicate the cylinder ends to form a torus
    for (int iR = 0; iR <= radialSamples; iR++, i++) {
        BufferUtils.copyInternalVector3(fpb, iR, i);
        BufferUtils.copyInternalVector3(fnb, iR, i);
        BufferUtils.copyInternalVector2(ftb, iR, i);
        ftb.put(i * 2 + 1, 1.0f);
    }
}