Java Code Examples for java.util.Random#nextFloat()

The following examples show how to use java.util.Random#nextFloat() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: BlockMapleLeaveRed.java    From Sakura_mod with MIT License 6 votes vote down vote up
@SideOnly(Side.CLIENT)
public void randomDisplayTick(IBlockState stateIn, World worldIn, BlockPos pos, Random rand) {
	Blocks.LEAVES.randomDisplayTick(stateIn, worldIn, pos, rand);
    if (rand.nextInt(40) == 0) {
        int j = rand.nextInt(2) * 2 - 1;
        int k = rand.nextInt(2) * 2 - 1;

        double d0 = pos.getX() + 0.5D + 0.25D * j;
        double d1 = pos.getY() - 0.15D;
        double d2 = pos.getZ() + 0.5D + 0.25D * k;
        double d3 = rand.nextFloat() * j * 0.1D;
        double d4 = ((rand.nextFloat()) * 0.055D) + 0.015D;
        double d5 = rand.nextFloat() * k * 0.1D;

        SakuraMain.proxy.spawnParticle(SakuraParticleType.MAPLERED, d0, d1, d2, d3, -d4, d5);
    }
}
 
Example 2
Source File: AnimationActivity.java    From subsampling-scale-image-view with Apache License 2.0 6 votes vote down vote up
private void play() {
    Random random = new Random();
    if (view.isReady()) {
        float maxScale = view.getMaxScale();
        float minScale = view.getMinScale();
        float scale = (random.nextFloat() * (maxScale - minScale)) + minScale;
        PointF center = new PointF(random.nextInt(view.getSWidth()), random.nextInt(view.getSHeight()));
        view.setPin(center);
        AnimationBuilder animationBuilder = view.animateScaleAndCenter(scale, center);
        if (getPage() == 3) {
            animationBuilder.withDuration(2000).withEasing(EASE_OUT_QUAD).withInterruptible(false).start();
        } else {
            animationBuilder.withDuration(750).start();
        }
    }
}
 
Example 3
Source File: ParallelSorting.java    From jdk8u-jdk with GNU General Public License v2.0 6 votes vote down vote up
void build(double[] x, int a, int g, int z, int n, int p, Random random) {
    int fromIndex = 0;
    double negativeValue = -random.nextFloat();
    double positiveValue =  random.nextFloat();

    writeValue(x, negativeValue, fromIndex, n);
    fromIndex += n;

    writeValue(x, -0.0d, fromIndex, g);
    fromIndex += g;

    writeValue(x, 0.0d, fromIndex, z);
    fromIndex += z;

    writeValue(x, positiveValue, fromIndex, p);
    fromIndex += p;

    writeValue(x, Double.NaN, fromIndex, a);
}
 
Example 4
Source File: ByteStreamSplitValuesReaderTest.java    From parquet-mr with Apache License 2.0 6 votes vote down vote up
@Test
public void testRandomInput() throws Exception {
  Random rand = new Random(1337);
  final int numElements = 256;
  byte[] byteData = new byte[numElements * 4];
  float[] values = new float[numElements];
  for (int i = 0; i < numElements; ++i) {
    float f = rand.nextFloat() * 1024.0f;
    values[i] = f;
    int fAsInt = Float.floatToIntBits(f);
    byteData[i] = (byte) (fAsInt & 0xFF);
    byteData[numElements + i] = (byte) ((fAsInt >> 8) & 0xFF);
    byteData[numElements * 2 + i] = (byte) ((fAsInt >> 16) & 0xFF);
    byteData[numElements * 3 + i] = (byte) ((fAsInt >> 24) & 0xFF);
  }
  testReader(byteData, values);
}
 
Example 5
Source File: RawIndexCreatorTest.java    From incubator-pinot with Apache License 2.0 6 votes vote down vote up
/**
 * Helper method that generates a random value for a given data type.
 *
 * @param dataType Data type for which to generate the random value
 * @return Random value for the data type
 */
public static Object getRandomValue(Random random, FieldSpec.DataType dataType) {
  switch (dataType) {
    case INT:
      return random.nextInt();
    case LONG:
      return random.nextLong();
    case FLOAT:
      return random.nextFloat();
    case DOUBLE:
      return random.nextDouble();
    case STRING:
      return StringUtil
          .sanitizeStringValue(RandomStringUtils.random(random.nextInt(MAX_STRING_LENGTH)), Integer.MAX_VALUE);
    default:
      throw new UnsupportedOperationException("Unsupported data type for random value generator: " + dataType);
  }
}
 
Example 6
Source File: BlockSoyMilk.java    From TofuCraftReload with MIT License 6 votes vote down vote up
@Override
@SideOnly(Side.CLIENT)
public void randomDisplayTick(IBlockState state, World world, BlockPos pos, Random rand) {
    super.randomDisplayTick(state, world, pos, rand);
    if (world.getBlockState(pos.up()).getMaterial() != Material.WATER && rand.nextInt(3) == 0)
    {
        if (this.getHeatStrength(world, pos) > 0)
        {
            float steamX = pos.getX() + 0.5F;
            float steamY = pos.getY() + 0.9F;
            float steamZ = pos.getZ() + 0.5F;
            float steamRandX = rand.nextFloat() * 0.6F - 0.3F;
            float steamRandZ = rand.nextFloat() * 0.6F - 0.3F;
            double gRand1 = rand.nextGaussian() * 0.01D;
            double gRand2 = rand.nextGaussian() * 0.01D;
            double gRand3 = rand.nextGaussian() * 0.01D;
            world.spawnParticle(EnumParticleTypes.EXPLOSION_NORMAL, (steamX + steamRandX), steamY, (steamZ + steamRandZ), gRand1, gRand2, gRand3);
        }
    }
}
 
Example 7
Source File: TypeManagerO.java    From Math-Game with Apache License 2.0 6 votes vote down vote up
/**
 * @return A randomly generated ArrayList of fractions (stored as doubles)
 */
public ArrayList<Double> randomFractionValues() {
	Random generator = new Random();
	Random fractionRand = new Random();
	
	currentRowNumber = (int)(generator.nextFloat() * rowCount);
	System.out.println("Current row: " + (currentRowNumber + 1));
	currentRow = currentSheet.getRow(currentRowNumber);

	ArrayList<Double> cardValues = new ArrayList<Double>();
	
	for (int x = 0; x < 6; x++) {
		cardValues.add(((int)(fractionRand.nextDouble() * 10)) / 10.0);
	}
	int RandomInsert1 = (int)(generator.nextFloat() * 6);
	int RandomInsert2;
	do {
		RandomInsert2 = (int)(generator.nextFloat() * 6);
	} while (RandomInsert2 == RandomInsert1); // The two values must be in distinct NumberCards (i.e. not the same card!)

	cardValues.set(RandomInsert1, convertFractiontoDecimal(currentRow.getCell(1).getStringCellValue()));
	cardValues.set(RandomInsert2, convertFractiontoDecimal(currentRow.getCell(3).getStringCellValue()));

	return cardValues;
}
 
Example 8
Source File: ParallelSorting.java    From streamsupport with GNU General Public License v2.0 6 votes vote down vote up
void build(double[] x, int a, int g, int z, int n, int p, Random random) {
    int fromIndex = 0;
    double negativeValue = -random.nextFloat();
    double positiveValue =  random.nextFloat();

    writeValue(x, negativeValue, fromIndex, n);
    fromIndex += n;

    writeValue(x, -0.0d, fromIndex, g);
    fromIndex += g;

    writeValue(x, 0.0d, fromIndex, z);
    fromIndex += z;

    writeValue(x, positiveValue, fromIndex, p);
    fromIndex += p;

    writeValue(x, Double.NaN, fromIndex, a);
}
 
Example 9
Source File: PlayerOptionsManager.java    From SkyWarsReloaded with GNU General Public License v3.0 5 votes vote down vote up
private float getData(ParticleEffect p) {
	Random random = new Random();
	float data = p.getData();
	if (p.getData() == -1) {
		data = random.nextFloat();
	}
	return data;
}
 
Example 10
Source File: GLBubble.java    From Android-AudioRecorder-App with Apache License 2.0 5 votes vote down vote up
public GLBubble(float[] color, float startX, float fromY, float toY, float size, Random random) {
  super(color);
  this.random = random;
  update(startX, fromY, toY, size);
  float[] vertices = new float[(POINTS_PER_CIRCLE + 1) * COORDS_PER_VERTEX];
  short[] indices = new short[POINTS_PER_CIRCLE * COORDS_PER_VERTEX];
  int i;
  for (i = 0; i < indices.length / COORDS_PER_VERTEX - 1; i++) {
    indices[COORDS_PER_VERTEX * i] = 0;
    indices[COORDS_PER_VERTEX * i + 1] = (short) (i + 1);
    indices[COORDS_PER_VERTEX * i + 2] = (short) (i + 2);
  }
  // connect first and last elements
  indices[COORDS_PER_VERTEX * i] = 0;
  indices[COORDS_PER_VERTEX * i + 1] = (short) (i + 1);
  indices[COORDS_PER_VERTEX * i + 2] = (short) 1;
  ByteBuffer verticesByteBuffer = ByteBuffer.allocateDirect(vertices.length * SIZE_OF_FLOAT);
  verticesByteBuffer.order(ByteOrder.nativeOrder());
  vertexBuffer = verticesByteBuffer.asFloatBuffer();
  vertexBuffer.put(vertices);
  vertexBuffer.position(0);
  ByteBuffer indicesByteBuffer = ByteBuffer.allocateDirect(indices.length * SIZE_OF_SHORT);
  indicesByteBuffer.order(ByteOrder.nativeOrder());
  shortBuffer = indicesByteBuffer.asShortBuffer();
  shortBuffer.put(indices);
  shortBuffer.position(0);
  angle = (float) (random.nextFloat() * 2 * Math.PI);
}
 
Example 11
Source File: MusicWaveView.java    From PLDroidShortVideo with Apache License 2.0 5 votes vote down vote up
private void generateWaveArray(){
    int count = mWidth / (WAVE_WIDTH + WAVE_OFFSET);
    mWaveArray = new float[count];
    Random random = new Random();
    random.setSeed(mMusicDurationMs);
    for(int i = 0; i < count; i++){
        mWaveArray[i] = random.nextFloat();
        if(mWaveArray[i] <  MIN_WAVE_RATE){
            mWaveArray[i] += MIN_WAVE_RATE;
        }
    }
}
 
Example 12
Source File: ItemBaseOmnitool.java    From Electro-Magic-Tools with GNU General Public License v3.0 5 votes vote down vote up
@Override
public boolean onBlockStartBreak(ItemStack stack, int x, int y, int z, EntityPlayer player) {
    if (player.worldObj.isRemote) {
        return false;
    }
    Block block = player.worldObj.getBlock(x, y, z);
    if (block instanceof IShearable) {
        IShearable target = (IShearable) block;
        if (target.isShearable(stack, player.worldObj, x, y, z)) {
            ArrayList<ItemStack> drops = target.onSheared(stack, player.worldObj, x, y, z,
                    EnchantmentHelper.getEnchantmentLevel(Enchantment.fortune.effectId, stack));
            Random rand = new Random();
            for (ItemStack drop : drops) {
                float f = 0.7F;
                double d = (double) (rand.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
                double d1 = (double) (rand.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
                double d2 = (double) (rand.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
                EntityItem entityitem = new EntityItem(player.worldObj, (double) x + d, (double) y + d1, (double) z + d2, drop);
                entityitem.delayBeforeCanPickup = 10;
                player.worldObj.spawnEntityInWorld(entityitem);
            }
            stack.damageItem(1, player);
            player.addStat(StatList.mineBlockStatArray[Block.getIdFromBlock(block)], 1);
        }
    }
    return false;
}
 
Example 13
Source File: GooTransition2D.java    From Pixelitor with GNU General Public License v3.0 5 votes vote down vote up
/**
 * Creates a new goo transition.
 *
 * @param columns the number of columns to use.
 */
public GooTransition2D(int columns) {
    Random r = new Random();
    offset = new float[columns];
    accel = new float[columns];
    boolean ok = false;
    long seed = System.currentTimeMillis();
    while (!ok) {
        seed++;
        r.setSeed(seed);
        ok = true;
        for (int a = 0; a < columns && ok; a++) {
            offset[a] = -r.nextFloat();
            accel[a] = 4 * r.nextFloat() + 0.2f;
            if (accel[a] + 1 + offset[a] < 1.2) {
                ok = false;
            }
        }
        if (ok) {
            //make sure at least one strand takes up the whole time t=[0,1]
            boolean atLeastOneSlowOne = false;
            for (int a = 0; a < columns && !atLeastOneSlowOne; a++) {
                atLeastOneSlowOne = accel[a] + 1 + offset[a] < 1.3;
            }
            ok = atLeastOneSlowOne;
        }
    }
}
 
Example 14
Source File: AccelerationInitializer.java    From ParticleLayout with Apache License 2.0 5 votes vote down vote up
@Override
public void initParticle(Particle p, Random r) {
	float angle = mMinAngle;
	if (mMaxAngle != mMinAngle) {
		angle = r.nextInt(mMaxAngle - mMinAngle) + mMinAngle;
	}
	float angleInRads = (float) (angle*Math.PI/180f);
	float value = r.nextFloat()*(mMaxValue-mMinValue)+mMinValue;
	p.mAccelerationX = (float) (value * Math.cos(angleInRads));
	p.mAccelerationY = (float) (value * Math.sin(angleInRads));
}
 
Example 15
Source File: EntityPathNavigateDrone.java    From PneumaticCraft with GNU General Public License v3.0 5 votes vote down vote up
@Override
public void onUpdateNavigation(){
    if(isGoingToTeleport()) {
        if(teleportCounter == 0 || teleportCounter == 60) {
            NetworkHandler.sendToAllAround(new PacketPlaySound(Sounds.HUD_INIT, pathfindingEntity.posX, pathfindingEntity.posY, pathfindingEntity.posZ, 0.1F, teleportCounter == 0 ? 0.7F : 1F, true), pathfindingEntity.worldObj);
        }

        if(teleportCounter < TELEPORT_TICKS - 40) {
            Random rand = pathfindingEntity.getRNG();
            float f = (rand.nextFloat() - 0.5F) * 0.02F * teleportCounter;
            float f1 = (rand.nextFloat() - 0.5F) * 0.02F * teleportCounter;
            float f2 = (rand.nextFloat() - 0.5F) * 0.02F * teleportCounter;
            NetworkHandler.sendToAllAround(new PacketSpawnParticle("portal", pathfindingEntity.posX, pathfindingEntity.posY, pathfindingEntity.posZ, f, f1, f2), pathfindingEntity.worldObj);
        }

        if(++teleportCounter > TELEPORT_TICKS) {
            if(pathfindingEntity.isBlockValidPathfindBlock(telX, telY, telZ)) {
                teleport();
            }
            teleportCounter = -1;
            setPath(null, 0);
            pathfindingEntity.getMoveHelper().setMoveTo(telX, telY, telZ, pathfindingEntity.getSpeed());
            pathfindingEntity.addAir(null, -10000);
        }
    } else {
        super.onUpdateNavigation();
    }
}
 
Example 16
Source File: Avalanche.java    From ud405 with MIT License 5 votes vote down vote up
public void update(float delta, Viewport viewport){
    Random random = new Random();
    if (random.nextFloat() < delta * SPAWNS_PER_SECOND){
        boulders.add(new Boulder(viewport));
    }

    for (int i = 0; i < boulders.size; i++){
        Boulder boulder = boulders.get(i);
        boulder.update(delta);
        if (boulder.isBelowScreen()){
            boulders.removeIndex(i);
        }
    }
}
 
Example 17
Source File: NetworkStatsHistory.java    From android_9.0.0_r45 with Apache License 2.0 4 votes vote down vote up
public static long randomLong(Random r, long start, long end) {
    return (long) (start + (r.nextFloat() * (end - start)));
}
 
Example 18
Source File: SpeeddByComponentsInitializer.java    From ParticleLayout with Apache License 2.0 4 votes vote down vote up
@Override
public void initParticle(Particle p, Random r) {
	p.mSpeedX = r.nextFloat()*(mMaxSpeedX-mMinSpeedX)+mMinSpeedX;
	p.mSpeedY = r.nextFloat()*(mMaxSpeedY-mMinSpeedY)+mMinSpeedY;
}
 
Example 19
Source File: BlockMapleSaplingGreen.java    From Sakura_mod with MIT License 4 votes vote down vote up
@Override
public boolean canUseBonemeal(World worldIn, Random rand, BlockPos pos, IBlockState state) {
	return rand.nextFloat() < 0.5;
}
 
Example 20
Source File: TestBM25Similarity.java    From lucene-solr with Apache License 2.0 4 votes vote down vote up
@Override
protected Similarity getSimilarity(Random random) {
  // term frequency normalization parameter k1
  final float k1;
  switch (random.nextInt(4)) {
    case 0:
      // minimum value
      k1 = 0;
      break;
    case 1:
      // tiny value
      k1 = Float.MIN_VALUE;
      break;
    case 2:
      // maximum value
      // upper bounds on individual term's score is 43.262806 * (k1 + 1) * boost
      // we just limit the test to "reasonable" k1 values but don't enforce this anywhere.
      k1 = Integer.MAX_VALUE;
      break;
    default:
      // random value
      k1 = Integer.MAX_VALUE * random.nextFloat();
      break;
  }
  
  // length normalization parameter b [0 .. 1]
  final float b;
  switch (random.nextInt(4)) {
    case 0:
      // minimum value
      b = 0;
      break;
    case 1:
      // tiny value
      b = Float.MIN_VALUE;
      break;
    case 2:
      // maximum value
      b = 1;
      break;
    default:
      // random value
      b = random.nextFloat();
      break;
  }
  return new BM25Similarity(k1, b);
}