Examples with FastRandom org.terasology.utilities.random.FastRandom used on opensource projects

Example 11 with FastRandom

use of org.terasology.utilities.random.FastRandom in project Terasology by MovingBlocks.

the class WhiteNoiseTest method testDistribution.

@Test
public void testDistribution() {
    FastRandom rng = new FastRandom(0xBEEF);
    WhiteNoise noiseGen = new WhiteNoise(0xDEADC0DE);
    int count = 100000;
    int bucketCount = 20;
    int[] buckets = new int[bucketCount];
    for (int i = 0; i < count; i++) {
        float posX = rng.nextFloat() * 100f;
        float posY = rng.nextFloat() * 100f;
        float posZ = rng.nextFloat() * 100f;
        float noise = 0.5f + 0.5f * noiseGen.noise(posX, posY, posZ);
        int idx = (int) (noise * bucketCount);
        if (idx == bucketCount) {
            idx = bucketCount - 1;
        }
        buckets[idx]++;
    }
    float avg = count / bucketCount;
    for (int i = 0; i < bucketCount; i++) {
        float val = Math.abs((buckets[i] - avg) / avg);
        // less than 5% deviation from the expected average
        Assert.assertTrue(val < 0.05);
    }
}

Example 12 with FastRandom

use of org.terasology.utilities.random.FastRandom in project Terasology by MovingBlocks.

the class BlockDropGrammarSystem method initialise.

@Override
public void initialise() {
    blockItemFactory = new BlockItemFactory(entityManager);
    random = new FastRandom();
}

Example 13 with FastRandom

use of org.terasology.utilities.random.FastRandom in project Terasology by MovingBlocks.

the class TreeRasterizer method generateChunk.

@Override
public void generateChunk(CoreChunk chunk, Region chunkRegion) {
    TreeFacet facet = chunkRegion.getFacet(TreeFacet.class);
    for (Map.Entry<BaseVector3i, TreeGenerator> entry : facet.getRelativeEntries().entrySet()) {
        BaseVector3i pos = entry.getKey();
        TreeGenerator treeGen = entry.getValue();
        int seed = relativeToWorld(facet, pos).hashCode();
        Random random = new FastRandom(seed);
        treeGen.generate(blockManager, chunk, random, pos.x(), pos.y(), pos.z());
    }
}

Example 14 with FastRandom

use of org.terasology.utilities.random.FastRandom in project Terasology by MovingBlocks.

the class BlockInventorySystem method dropContentsOfInventory.

@ReceiveEvent(components = { InventoryComponent.class, DropBlockInventoryComponent.class, LocationComponent.class })
public void dropContentsOfInventory(DoDestroyEvent event, EntityRef entity) {
    Vector3f position = entity.getComponent(LocationComponent.class).getWorldPosition();
    FastRandom random = new FastRandom();
    int slotCount = InventoryUtils.getSlotCount(entity);
    for (int i = 0; i < slotCount; i++) {
        EntityRef itemInSlot = InventoryUtils.getItemAt(entity, i);
        if (itemInSlot.exists()) {
            inventoryManager.removeItem(entity, entity, itemInSlot, false);
            itemInSlot.send(new DropItemEvent(position));
            itemInSlot.send(new ImpulseEvent(random.nextVector3f(30.0f)));
        }
    }
}