public boolean generate(World worldIn, Random rand, BlockPos position) {
    float f = rand.nextFloat() * (float) Math.PI;
    double d0 = (float) (position.getX() + 8) + MathHelper.sin(f) * (float) this.numberOfBlocks / 8.0F;
    double d1 = (float) (position.getX() + 8) - MathHelper.sin(f) * (float) this.numberOfBlocks / 8.0F;
    double d2 = (float) (position.getZ() + 8) + MathHelper.cos(f) * (float) this.numberOfBlocks / 8.0F;
    double d3 = (float) (position.getZ() + 8) - MathHelper.cos(f) * (float) this.numberOfBlocks / 8.0F;
    double d4 = position.getY() + rand.nextInt(3) - 2;
    double d5 = position.getY() + rand.nextInt(3) - 2;

    for (int i = 0; i < this.numberOfBlocks; ++i) {
        float f1 = (float) i / (float) this.numberOfBlocks;
        double d6 = d0 + (d1 - d0) * (double) f1;
        double d7 = d4 + (d5 - d4) * (double) f1;
        double d8 = d2 + (d3 - d2) * (double) f1;
        double d9 = rand.nextDouble() * (double) this.numberOfBlocks / 16.0D;
        double d10 = (double) (MathHelper.sin((float) Math.PI * f1) + 1.0F) * d9 + 1.0D;
        double d11 = (double) (MathHelper.sin((float) Math.PI * f1) + 1.0F) * d9 + 1.0D;
        int j = MathHelper.floor(d6 - d10 / 2.0D);
        int k = MathHelper.floor(d7 - d11 / 2.0D);
        int l = MathHelper.floor(d8 - d10 / 2.0D);
        int i1 = MathHelper.floor(d6 + d10 / 2.0D);
        int j1 = MathHelper.floor(d7 + d11 / 2.0D);
        int k1 = MathHelper.floor(d8 + d10 / 2.0D);

        for (int l1 = j; l1 <= i1; ++l1) {
            double d12 = ((double) l1 + 0.5D - d6) / (d10 / 2.0D);

            if (d12 * d12 < 1.0D) {
                for (int i2 = k; i2 <= j1; ++i2) {
                    double d13 = ((double) i2 + 0.5D - d7) / (d11 / 2.0D);

                    if (d12 * d12 + d13 * d13 < 1.0D) {
                        for (int j2 = l; j2 <= k1; ++j2) {
                            double d14 = ((double) j2 + 0.5D - d8) / (d10 / 2.0D);

                            if (d12 * d12 + d13 * d13 + d14 * d14 < 1.0D) {
                                BlockPos blockpos = new BlockPos(l1, i2, j2);

                                if (this.predicate.apply(worldIn.getBlockState(blockpos))) {
                                    worldIn.setBlockState(blockpos, this.oreBlock, 2);
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    return true;
}