public float getStarBrightness(float par1)
    {
        float var2 = this.getCelestialAngle(par1);
        float var3 = 1.0F - (MathHelper.cos(var2 * (float)Math.PI * 2.0F) * 2.0F + 0.75F);

        if (var3 < 0.0F)
        {
            var3 = 0.0F;
        }

        if (var3 > 1.0F)
        {
            var3 = 1.0F;
        }

        return var3 * var3 * 0.5F;
    }