Motion.java 文件源码

private static void emulateSendMotion(EntityPlayer player) {
    // emulate client player's sendMotion
    Vec3d newPosition = null;
    if (player.isRiding()) {
        // needs improvement
        newPosition = getPosition(player);
        emulateHandleMotion(player, newPosition, getOnGround(player));
    } else if (getView() == player) {
        double dx = getX(sentPosition) - getX(player);
        double dy = getY(sentPosition) - getY(player);
        double dz = getZ(sentPosition) - getZ(player);
        boolean sync = (dx*dx + dy*dy + dz*dz > 9.0E-4D
            || ticksForForceSync >= 20);
        ++ticksForForceSync;
        if (sync) {
            newPosition = sentPosition = getPosition(player);
            ticksForForceSync = 0;
        }
        emulateHandleMotion(player, newPosition, getOnGround(player));
    }
}