for(Entity e : Minecraft.getMinecraft().theWorld.loadedEntityList) {
    if(!(e instanceEntityLivingBase) || e instanceof EntityPlayerSP) {
        continue;
    }

    double d1 = mc.thePlayer.posX - e.posX;
    double d0;

    for (d0 = mc.thePlayer.posZ - e.posZ; d1 * d1 + d0 * d0 < 1.0E-4D; d0 = (Math.random() - Math.random()) * 0.01D) {
        d1 = (Math.random() - Math.random()) * 0.01D;
    }

    float attackYaw = (float) (MathHelper.func_181159_b(d0, d1) * 180D / Math.PI - e.rotationYaw);
}