"catmull-rom Spline"The Catmull-rom algorithm guarantees 2 points:1. The 1 stratum number of Pi per point equals pi+1-pi-1.2, through all pi points.Where feature 2 is the maximum difference from Bezier curves. Because of this characteristic, the catmull-rom algorithm is suitable to be used as trajectory line algorithm.The tangent of Point pi: Tau (pi+1−pi−1). The
How to Implement the switch CD-ROM
The operation on the CD-ROM can be implemented through the mcisendcommand function.
The following is implemented using VC.
Code :
// Device ID
DWORD wdevid;
// Enable device parameters
Mci_open_parms mciom;
// Set the device name to cd_rom
Mciom. lpstrdevicetype = "cdaudio ";
// Open this device
If (mcisendcommand (0, mci_open, mci_open_type, (DWORD) (lpvoid) mciom ))
This article is an example of how Android obtains SD card and cell phone ROM capacity. Share to everyone for your reference, specific as follows:
Here is a simple example to get the capacity of the SD card and the capacity of the cell phone ROM, the code is as follows:
Package com.urovo.sdcardspace;
Import Java.io.File;
Import Android.os.Bundle;
Import android.os.Environment;
Import Android.os.StatFs;
When using a computer optical drive to read a disk, the CD-ROM drive has a "tweeted" sound.
The above fault is a lot of users have encountered, is due to the CD ROM drive reading capacity or poor quality, CD-ROM indicates that there is serious dirt. In this case, the optical drive can check the format of the disc and the existence of the disc, but when re
1. Find the right original brush machine bag
The tools you need: "The firmware Finder"Search for "Com.teammt.gmanrainy.huaweifirmwarefinder" and download the apk to download to the original firmware. 2. Analytic Update.app
Tools for parsing: https://github.com/qiaofei32/huawei_romThere are several available programs/scripts online, such as: Huaweiupdateextractor and split_updata.pl, but huaweiupdateextractor for EXE, inconvenient to study the children's shoes, split_updata.pl You need to insta
Solution for ERROR expansion ROM not INITIALIZED-PCI on motherboard
Display after power-on:Intializing Intel (r) Boot Agent GE V1.2.31Pxe-e05:the LAN Adapter ' s configuation is corrupted or has not been. The Boot Agent cannot continue.Wait a few seconds and then showERRORExpansion ROM not INITIALIZED-PCI on motherboardbus:00, device:00, function:00Press Pre
how to compile I9250 rom based on android4.4.2 source and ANDROID-4.3.1_R1 driverRain 2014-05-04 Contact information: dennis.hu.cd at gmail.comDescription:After a lot of tossing and turning, I finally compiled the source code of Android4.4.2 successfully ran on my Samsung Galaxy Nexus I9250 phone. The period is inseparable from the help of a foreign friend, the author of reference [1] Sato Kensuke. The process is recorded here, we hope to help!The fir
Downloading cm source code is actually similar to downloading Google's pure Android source code. below is the official cm website. You need to download the ROM corresponding to your mobile phone and put it in the sdcard root directory, just in case.
Http://www.cyanogenmod.com/
Next I will introduce another website: http://forum.xda-developers.com/index.php
This is an xda developer forum, where experts like cloud will help you
Now let's start to show
Mount the CD-ROM using the mount command in CentOS7
When using the operating system, we sometimes use optical disks and optical drives. Unlike windows's access to the content of a CD, if you want to access the CD in CentOS7, You need to attach the CD to a local directory. I understood this as a local image for the content of the CD.
Next, let's take a look at how it works.
Mount-t auto/dev/cdrom/mnt/cdrom
Explanations:Mount is the mount command.-T
repo sync
The sync can take quite some time, it pulls about 2gig of files.
Create Build Environment
cd ~/android-cm
source build/envsetup.sh
Build ADB (only required if you haven't built it yet)
make -j4 adb
Configure build
Now you need choose which product you want to build, you can list all buildable productssed -n -e "s/^add_lunch_combo//gp" vendor/*/vendorsetup.sh
lunch cyanogen_passion-userdebugSelect a cyanogenmod build type
Get proprietary files from your device
cd ~/and
We know that the root user is the highest-performing Linux administrator user, and he can do any permission operation, but our operating system has also considered the disadvantage that we will give users hints when they do not understand the attributes and importance of the files.For example, when we open a disk file under Linux, we want to directly modify the properties of the file on the disk, usually prompt for a read-only file, then we can move it from disk to the local directory, so that t
System warehouse cd /var/www/html/ cd centos mkdir 6 在设置中将centos6的光盘挂载上来 echo "- - -" > /sys/class/scsi_host/host0/scan 扫描出光盘 mount /dev/sr1 6/ 挂载光盘,设置系统仓库 mount 查看是否挂载成功(3) Using virtual hard disk to simulate the production of USB boot disk 先在虚拟机设置中添加一块硬盘 vim /app/bootiso/isolinux/isolinux.cfg ks=hd:sdb1:/ks/ks6-desktop.cfg 此处需要修改将cdrom改为hd:sdb1(硬盘) mkisofs -R -J -T -v --no-emul-boot --boot-load-size
Sometimes you can't get on the net, or you can work in a ghost place where the Internet is down and restricted. But you need to pack a package for your server.This time, you might as well use the installation disk! As follows:It's the same as when you use Yum with Redhat.The steps are as follows:1, plug in the CD or USB, in short, your installation media.2. Mount it Upmount/dev/sdc1/media/3. Put the repo file inCp/media/media.repo/etc/yum.repos.d/media.repo4. Change, add such a lineBase baseurl=
One, VIO server create virtual optical drive1 Check whether the library is created$lsrep2 Create vmlibrary; VG and size can be defined by themselves3 FTP SCP ISO file to vio server generally under/home/padmin4 Import ISO file (you can also copy to/var/vio/vmlibrary)$mkvopt-name *.iso-file/home/padmin/*.iso5 Create a VSCSI adapter create a virtual optical drive device under this adapter$ mkvdev-fbo-vadapter vhost*$ lsmap6. Modify the ISO file properties to read-only, at which point the ISO file c
RHEL7.0 configure CD-ROM as local YUM
By default, no yum source exists in the initial installation of RHEL7.0. mount a local DVD to/mnt/cdrom and connect the system yum source to/mnt/cdrom.# Use yum-config-manager to generate a source file template[Root @ server0 yum. repos. d] # yum-config-manager -- add-repo = cdromLoaded plugins: langpacks, product-idAdding repo from: cdrom[Cdrom]Name = added from: cdromBaseurl = cdromEnabled = 1# Edit the generate
If you want to be a CD player, that's the trick. This is a way to control the pop-up and shutdown of the CD-ROM drive door, first you need to add MMSystem in the Uses section, then add two TButton buttons, write the following statement in the button event, remember that when the call is complete must show or Judge Returnstring, Otherwise the program will make an error:
procedure TForm1.Button1Click(Sender: TObject);var returnstring:pchar;begin//弹出ret
1. Environmental descriptionHost host operating system: Windows 7Virtual machine software: VMware WorkstationVirtual operating system: Linux 6.3 (File system EXT4)2. Error phenomena[Email protected] ~]# Mount/dev/cdrom/mnt/cdrom
Mount:you must specify the filesystem type
3. Cause analysis(1) because it is a virtual machine, the first suspect is that the "CD/DVD" In the device of the virtual machine is not set, but check that its "Connection" has the specified ISO file
Specific steps to operate:
The Win7 flagship ISO system files downloaded from the Internet will be deposited to D disk. (Latest Windows7 system download address: http://www.xitonghome.com/soft/html/list1-1.html)
Second, download virtual optical drive from the Internet, open the installation in the taskbar right notification area to display the "Virtual Daemon Manager" icon, in My Computer window display Virtual CD drive letter.
Three, right click the taskbar right notice area "Virtual Daemon
In Windows7, many discs are not recognizable and open. This problem is caused by a feature in Windows that can cause you to not be able to browse the open disc directory, load the Autorun program or play the media file automatically, and disable this feature to resolve the problem if it is not available. This problem is especially serious for discs that you burn. Or the optical drive does not read the disk, double-click the letter tip: Please insert a CD-ROM
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