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• Silverlight Cream for May 24, 2010 -- #868

  - by Dave Campbell

  In this Issue: Victor Gaudioso, Weidong Shen, SilverLaw, Alnur Ismail, Damon Payne, and Karl Erickson. Shoutout: Tim Greenfield posted his slides and materials (not the padlock yet) from Portland Code Camp: Rx for Silverlight at Portland CodeCamp András Velvárt posted his material from his User Group talk: 20 Silverlight 4 demos in one zip file From SilverlightCream.com: New Silverilght Video Tutotial: How to Build Your Very Own Tutorial Cam Do you like the video Victor Gaudioso has of himself in his tutorials? well... in this one, he explains how to go about doing just that for yourself! A Sample Silverlight 4 Application Using MEF, MVVM, and WCF RIA Services - Part 1 Weidong Shen has part 1 of a new series up on Code Project about Siverlight, MVVM, MEF, and WCF RIA Services. Silver Spot Light - Silverlight 4 SilverLaw posted a control to the Expression Gallery and I have to agree with his comment "You' ll love to switch it on and off & on and off & on and off ... ;-)" A Distributable (.exe) Silverlight OOB Application Alnur Ismail has a step-by-step post up on building an OOB app deployable in an exe file. You'll need a file from a post by Tim, but there's a link in the post. DataContract based Binary Serialization for Silverlight Damon Payne serves up on a promise to post about a subject he's been discussing: DataContract based Binary Serialization for Silverlight... and he's writing about the process he followed, plus all the code is available. Creating a Custom Out-of-Browser Window in Silverlight 4 Karl Erickson at the Silverlight SDK blog discusses OOB visualization effects... what you can and can't do, and what limitations you're up against. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Are programmers getting lazier and less competent

  - by Skeith

  I started programming in C++ at uni and loved it. In the next term we changed to VB6 and I hated it. I could not tell what was going on, you drag a button to a form and the ide writes the code for you. While I hated the way VB functioned I cannot argue that it was faster and easier than doing the same thing in C++ so i can see why it is a popular language. Now I am not calling VB developers lazy in just saying it easier than C++ and I have noticed that a lot of newer languages are following this trend such a C#. This leads me to think that as more business want quick results more people will program like this and sooner or later there will be no such thing as what we call programming now. Future programmers will tell the computer what they want and the compiler will write the program for them like in star trek. Is this just an under informed opinion of a junior programmer or are programmers getting lazier and less competent in general? EDIT: A lot of answers say why re invent the wheel and I agree with this but when there are wheels available people are not bothering to learn how to make the wheel. I can google how to do pretty much anything in any language and half the languages do so much for you when it come to debugging they have no idea what there code does of how to fix the error. That's how I cam up with the theory that programmers are becoming lazier and less competent as no one cares how stuff works just that it does until it does not.

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• Group Video Chat On iPad With Fring App

  - by Gopinath

  Apple’s Facetime is the simplest and most easy to use video chat application available for iOS devices and Apple Macs. Facetime lets you have a one-to-one video chat, but what about having a group chat on your iPad with a bunch of friends? Here comes Fring App for iPad that lets you group chat up to 4 members at a time. Unlike Facetime Fring does not impose any restriction on the network connectivity for video chatting. You can initiate a group video chatting on any network (3G, Wi-Fi, 4G, etc.) but Wi-Fi is the most preferred option for smooth video streaming. Also Fring is a cross platform application(runs on iOS, Android & Nokia), so your group video chat session can have a mix of devices – iPads, Android smartphones/tablets and Nokia mobiles. Anyone mobile device with a front facing  cam and Fring app is allowed to join the party. Here is the promotional ad of Fring’s group video chatting application By the way did I say that Fring is a free app? Group video on iPad at no cost!!! Download Fring from Apple’s AppStore This article titled,Group Video Chat On iPad With Fring App, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Multiline Replacement With Visual Studio

  - by Alois Kraus

  I had to remove some file headers in a bigger project which were all of the form #region File Header /*[ Compilation unit ----------------------------------------------------------       Name            : Class1.cs       Language        : C#     Creation Date   :      Description     : -----------------------------------------------------------------------------*/ /*] END */ #endregion I know that would be a cool thing to write a simple C# program use a recursive file search, read all lines skip the first n lines and write the files back to disc. But I wanted to test things first before I ruin my source files with one little typo. There comes the Visual Studio Search and Replace in Files dialog into the game. I can test my regular expression to do a multiline match with the Find button before actually breaking anything. And if something goes wrong I have the Undo button.   There is a nice blog post from Paulo Morgado online who deals with Multiline Regular expressions. The Visual Studio Regular expressions are non standard so you have to adapt your usual Regex know how to the other patterns. The pattern I cam finally up with is \#region File Header:b*(.*\n)@\#endregion The Regular expression can be read as \#region File Header Match “#region File Header” \# Escapes the # character since it is a quantifier. :b* After this none or more spaces or tabs can follow (:b stands for space or tab) (.*\n)@ Match anything across lines in a non greedy way (the @ character makes it non greedy) to prevent matching too much until the #endregion somewhere in our source file. \#endregion Match everything until “#endregion” is found I had always knew that Visual Studio can do it but I never bothered to learn the non standard Regex syntax. This is powerful and it is inside Visual Studio since 2005!

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• Keep 3d model facing the camera at all angles

  - by Sparky41

  I'm trying to keep a 3d plane facing the camera at all angles but while i have some success with this: Vector3 gunToCam = cam.cameraPosition - getWorld.Translation; Vector3 beamRight = Vector3.Cross(torpDirection, gunToCam); beamRight.Normalize(); Vector3 beamUp = Vector3.Cross(beamRight, torpDirection); shipeffect.beamWorld = Matrix.Identity; shipeffect.beamWorld.Forward = (torpDirection) * 1f; shipeffect.beamWorld.Right = beamRight; shipeffect.beamWorld.Up = beamUp; shipeffect.beamWorld.Translation = shipeffect.beamPosition; *Note: Logic not wrote by me i just found this rather useful It seems to only face the camera at certain angles. For example if i place the camera behind the plane you can see it that only Roll's around the axis like this: http://i.imgur.com/FOKLx.png (imagine if you are looking from behind where you have fired from. Any idea what to what the problem is (angles are not my specialty) shipeffect is an object that holds this class variables: public Texture2D altBeam; public Model beam; public Matrix beamWorld; public Matrix[] gunTransforms; public Vector3 beamPosition;

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• opengl 3d texture issue

  - by user1478217

  Hi i'm trying to use a 3d texture in opengl to implement volume rendering. Each voxel has an rgba colour value and is currently rendered as a screen facing quad.(for testing purposes). I just can't seem to get the sampler to give me a colour value in the shader. The quads always end up black. When I change the shader to generate a colour (based on xyz coords) then it works fine. I'm loading the texture with the following code: glGenTextures(1, &tex3D); glBindTexture(GL_TEXTURE_3D, tex3D); unsigned int colours[8]; colours[0] = Colour::AsBytes<unsigned int>(Colour::Blue); colours[1] = Colour::AsBytes<unsigned int>(Colour::Red); colours[2] = Colour::AsBytes<unsigned int>(Colour::Green); colours[3] = Colour::AsBytes<unsigned int>(Colour::Magenta); colours[4] = Colour::AsBytes<unsigned int>(Colour::Cyan); colours[5] = Colour::AsBytes<unsigned int>(Colour::Yellow); colours[6] = Colour::AsBytes<unsigned int>(Colour::White); colours[7] = Colour::AsBytes<unsigned int>(Colour::Black); glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, colours); The colours array contains the correct data, i.e. the first four bytes have values 0, 0, 255, 255 for blue. Before rendering I bind the texture to the 2nd texture unit like so: glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_3D, tex3D); And render with the following code: shaders["DVR"]->Use(); shaders["DVR"]->Uniforms["volTex"].SetValue(1); shaders["DVR"]->Uniforms["World"].SetValue(Mat4(vl_one)); shaders["DVR"]->Uniforms["viewProj"].SetValue(cam->GetViewTransform() * cam->GetProjectionMatrix()); QuadDrawer::DrawQuads(8); I have used these classes for setting shader params before and they work fine. The quaddrawer draws eight instanced quads. The vertex shader code looks like this: #version 330 layout(location = 0) in vec2 position; layout(location = 1) in vec2 texCoord; uniform sampler3D volTex; ivec3 size = ivec3(2, 2, 2); uniform mat4 World; uniform mat4 viewProj; smooth out vec4 colour; void main() { vec3 texCoord3D; int num = gl_InstanceID; texCoord3D.x = num % size.x; texCoord3D.y = (num / size.x) % size.y; texCoord3D.z = (num / (size.x * size.y)); texCoord3D /= size; texCoord3D *= 2.0; texCoord3D -= 1.0; colour = texture(volTex, texCoord3D); //colour = vec4(texCoord3D, 1.0); gl_Position = viewProj * World * vec4(texCoord3D, 1.0) + (vec4(position.x, position.y, 0.0, 0.0) * 0.05); } uncommenting the line where I set the colour value equal to the texcoord works fine, and makes the quads coloured. The fragment shader is simply: #version 330 smooth in vec4 colour; out vec4 outColour; void main() { outColour = colour; } So my question is, what am I doing wrong, why is the sampler not getting any colour values from the 3d texture? [EDIT] Figured it out but can't self answer (new user): As soon as I posted this I figured it out, I'll put the answer up to help anyone else (it's not specifically a 3d texture issue, and i've also fallen afoul of it before, D'oh!). I didn't generate mipmaps for the texture, and the default magnification/minification filters weren't set to either GL_LINEAR, or GL_NEAREST. Boom! no textures. Same thing happens with 2d textures.

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• Can't get Wireless to work! (Fujitsu siemens ESPRIMO Mobile u9200) Ubuntu 12.4

  - by Martin Oscarsson

  I can't get wireless to work on my computer. I have recently installed 12.04. Computer name: (Fujitsu siemens ESPRIMO Mobile u9200) Hardware button starts bluetooth - so can't start that way. Have searched the Internet for help but can't find any on my specific problem! State: connected (global) - Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: ath5k State: disconnected Default: no *-network beskrivning: Trådlöst gränssnitt produkt: AR242x / AR542x Wireless Network Adapter (PCI-Express) tillverkare: Atheros Communications Inc. *-network beskrivning: Ethernet interface produkt: 88E8055 PCI-E Gigabit Ethernet Controller tillverkare: Marvell Technology Group Ltd. HERE IS ALL THE NETWORK INFO: ellika@ellikas:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:33:00:96:9a inet addr:192.168.1.26 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21e:33ff:fe00:969a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13778 errors:0 dropped:0 overruns:0 frame:0 TX packets:9510 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14022669 (14.0 MB) TX bytes:1001621 (1.0 MB) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1542 errors:0 dropped:0 overruns:0 frame:0 TX packets:1542 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:125040 (125.0 KB) TX bytes:125040 (125.0 KB) ellika@ellikas:~$ sudo ifconfig [sudo] password for ellika: eth0 Link encap:Ethernet HWaddr 00:1e:33:00:96:9a inet addr:192.168.1.26 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21e:33ff:fe00:969a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13801 errors:0 dropped:0 overruns:0 frame:0 TX packets:9528 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14024965 (14.0 MB) TX bytes:1002836 (1.0 MB) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1542 errors:0 dropped:0 overruns:0 frame:0 TX packets:1542 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:125040 (125.0 KB) TX bytes:125040 (125.0 KB) ellika@ellikas:~$ sudo ifconfig wlan0 up SIOCSIFFLAGS: Operationen inte möjlig p.g.a. RF-kill ellika@ellikas:~$ phy0 Wireless LAN phy0: command not found ellika@ellikas:~$ rfkill Usage: rfkill [options] command Options: --version show version (0.4-1ubuntu2 (Ubuntu)) Commands: help event list [IDENTIFIER] block IDENTIFIER unblock IDENTIFIER where IDENTIFIER is the index no. of an rfkill switch or one of: <idx> all wifi wlan bluetooth uwb ultrawideband wimax wwan gps fm ellika@ellikas:~$ sudo rf-kill unblock all sudo: rf-kill: kommandot hittades inte ellika@ellikas:~$ sudo rfkill unblock all ellika@ellikas:~$ sedan sudo ifconfig wlan0 sedan: command not found ellika@ellikas:~$ sudo ifconfig wlan0 wlan0 Link encap:Ethernet HWaddr 00:22:5f:3f:63:76 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) ellika@ellikas:~$ ^C ellika@ellikas:~$ ^C ellika@ellikas:~$ sudo rfkill unblock all ellika@ellikas:~$ sudo ifconfig wlan0 up SIOCSIFFLAGS: Operationen inte möjlig p.g.a. RF-kill ellika@ellikas:~$ sudo rfkill unblock all ellika@ellikas:~$ sudo rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes ellika@ellikas:~$ sudo rfkill unblock all ellika@ellikas:~$ echo -e "sudo lshw --class network:\n\n$(sudo lshw -c network)\n\nlspci -nnn | grep Ethernet:\n\n$(lspci -nnn | grep Ethernet)\n\nlsusb:\n\n$(lsusb)\n\niwlist wlan0 scanning:\n\n$(iwlist wlan0 scanning)\n\nrfkill list:\n\n$(rfkill list)\n\nping -c 5 google.com:\n\n$(ping -c 5 google.com)\n\nhost google.com 8.8.8.8:\n\n$(host google.com 8.8.8.8)\n\nlsb_release -a:\n\n$(lsb_release -a)\n\nuname -a:\n\n$(uname -a)" ^[[C^[[C^[[C^[[C^[[C^[[B wlan0 Failed to read scan data : Network is down No LSB modules are available. sudo lshw --class network: *-network beskrivning: Ethernet interface produkt: 88E8055 PCI-E Gigabit Ethernet Controller tillverkare: Marvell Technology Group Ltd. physical id: 0 bus info: pci@0000:04:00.0 logiskt namn: eth0 version: 14 serienummer: 00:1e:33:00:96:9a storlek: 100Mbit/s kapacitet: 1Gbit/s bredd: 64 bits klocka: 33MHz förmågor: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation konfiguration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full firmware=N/A ip=192.168.1.26 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resurser: irq:44 memory:f8000000-f8003fff ioport:3000(storlek=256) memory:f2000000-f201ffff *-network INAKTIVERAD beskrivning: Trådlöst gränssnitt produkt: AR242x / AR542x Wireless Network Adapter (PCI-Express) tillverkare: Atheros Communications Inc. physical id: 0 bus info: pci@0000:06:00.0 logiskt namn: wlan0 version: 04 serienummer: 00:22:5f:3f:63:76 bredd: 64 bits klocka: 33MHz förmågor: pm msi pciexpress msix bus_master cap_list ethernet physical wireless konfiguration: broadcast=yes driver=ath5k driverversion=3.2.0-30-generic-pae firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bg resurser: irq:18 memory:fa000000-fa00ffff lspci -nnn | grep Ethernet: 04:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8055 PCI-E Gigabit Ethernet Controller [11ab:4363] (rev 14) 06:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR242x / AR542x Wireless Network Adapter (PCI-Express) [168c:001c] (rev 04) lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 05e3:0715 Genesys Logic, Inc. USB 2.0 microSD Reader Bus 001 Device 003: ID 05c8:0103 Cheng Uei Precision Industry Co., Ltd (Foxlink) FO13FF-65 PC-CAM iwlist wlan0 scanning: rfkill list: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes ping -c 5 google.com: PING google.com (173.194.32.34) 56(84) bytes of data. 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=1 ttl=55 time=10.6 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=2 ttl=55 time=10.5 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=3 ttl=55 time=10.4 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=4 ttl=55 time=10.4 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=5 ttl=55 time=10.4 ms --- google.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4004ms rtt min/avg/max/mdev = 10.451/10.517/10.631/0.062 ms host google.com 8.8.8.8: Using domain server: Name: 8.8.8.8 Address: 8.8.8.8#53 Aliases: google.com has address 173.194.32.36 google.com has address 173.194.32.38 google.com has address 173.194.32.41 google.com has address 173.194.32.37 google.com has address 173.194.32.35 google.com has address 173.194.32.39 google.com has address 173.194.32.33 google.com has address 173.194.32.34 google.com has address 173.194.32.46 google.com has address 173.194.32.32 google.com has address 173.194.32.40 google.com has IPv6 address 2a00:1450:400f:801::100e google.com mail is handled by 40 alt3.aspmx.l.google.com. google.com mail is handled by 20 alt1.aspmx.l.google.com. google.com mail is handled by 30 alt2.aspmx.l.google.com. google.com mail is handled by 50 alt4.aspmx.l.google.com. google.com mail is handled by 10 aspmx.l.google.com. lsb_release -a: Distributor ID: Ubuntu Description: Ubuntu 12.04.1 LTS Release: 12.04 Codename: precise uname -a: Linux ellikas 3.2.0-30-generic-pae #48-Ubuntu SMP Fri Aug 24 17:14:09 UTC 2012 i686 i686 i386 GNU/Linux ellika@ellikas:~$ ellika@ellikas:~$ clear ellika@ellikas:~$ echo -e "sudo lshw --class network:\n\n$(sudo lshw -c network)\n\nlspci -nnn | grep Ethernet:\n\n$(lspci -nnn | grep Ethernet)\n\nlsusb:\n\n$(lsusb)\n\niwlist wlan0 scanning:\n\n$(iwlist wlan0 scanning)\n\nrfkill list:\n\n$(rfkill list)\n\nping -c 5 google.com:\n\n$(ping -c 5 google.com)\n\nhost google.com 8.8.8.8:\n\n$(host google.com 8.8.8.8)\n\nlsb_release -a:\n\n$(lsb_release -a)\n\nuname -a:\n\n$(uname -a)" wlan0 Failed to read scan data : Network is down No LSB modules are available. sudo lshw --class network: *-network beskrivning: Ethernet interface produkt: 88E8055 PCI-E Gigabit Ethernet Controller tillverkare: Marvell Technology Group Ltd. physical id: 0 bus info: pci@0000:04:00.0 logiskt namn: eth0 version: 14 serienummer: 00:1e:33:00:96:9a storlek: 100Mbit/s kapacitet: 1Gbit/s bredd: 64 bits klocka: 33MHz förmågor: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation konfiguration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full firmware=N/A ip=192.168.1.26 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resurser: irq:44 memory:f8000000-f8003fff ioport:3000(storlek=256) memory:f2000000-f201ffff *-network INAKTIVERAD beskrivning: Trådlöst gränssnitt produkt: AR242x / AR542x Wireless Network Adapter (PCI-Express) tillverkare: Atheros Communications Inc. physical id: 0 bus info: pci@0000:06:00.0 logiskt namn: wlan0 version: 04 serienummer: 00:22:5f:3f:63:76 bredd: 64 bits klocka: 33MHz förmågor: pm msi pciexpress msix bus_master cap_list ethernet physical wireless konfiguration: broadcast=yes driver=ath5k driverversion=3.2.0-30-generic-pae firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bg resurser: irq:18 memory:fa000000-fa00ffff lspci -nnn | grep Ethernet: 04:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8055 PCI-E Gigabit Ethernet Controller [11ab:4363] (rev 14) 06:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR242x / AR542x Wireless Network Adapter (PCI-Express) [168c:001c] (rev 04) lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 05e3:0715 Genesys Logic, Inc. USB 2.0 microSD Reader Bus 001 Device 003: ID 05c8:0103 Cheng Uei Precision Industry Co., Ltd (Foxlink) FO13FF-65 PC-CAM iwlist wlan0 scanning: rfkill list: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes ping -c 5 google.com: PING google.com (173.194.32.34) 56(84) bytes of data. 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=1 ttl=55 time=10.6 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=2 ttl=55 time=10.5 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=3 ttl=55 time=10.4 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=4 ttl=55 time=10.4 ms 64 bytes from arn06s02-in-f2.1e100.net (173.194.32.34): icmp_req=5 ttl=55 time=10.5 ms --- google.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4004ms rtt min/avg/max/mdev = 10.476/10.522/10.602/0.045 ms host google.com 8.8.8.8: Using domain server: Name: 8.8.8.8 Address: 8.8.8.8#53 Aliases: google.com has address 173.194.32.36 google.com has address 173.194.32.38 google.com has address 173.194.32.41 google.com has address 173.194.32.37 google.com has address 173.194.32.35 google.com has address 173.194.32.39 google.com has address 173.194.32.33 google.com has address 173.194.32.34 google.com has address 173.194.32.46 google.com has address 173.194.32.32 google.com has address 173.194.32.40 google.com has IPv6 address 2a00:1450:400f:801::100e google.com mail is handled by 40 alt3.aspmx.l.google.com. google.com mail is handled by 20 alt1.aspmx.l.google.com. google.com mail is handled by 30 alt2.aspmx.l.google.com. google.com mail is handled by 50 alt4.aspmx.l.google.com. google.com mail is handled by 10 aspmx.l.google.com. lsb_release -a: Distributor ID: Ubuntu Description: Ubuntu 12.04.1 LTS Release: 12.04 Codename: precise uname -a: Linux ellikas 3.2.0-30-generic-pae #48-Ubuntu SMP Fri Aug 24 17:14:09 UTC 2012 i686 i686 i386 GNU/Linux

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• 3D zooming technique to maintain the relative position of an object on screen

  - by stark

  Is it possible to zoom to a certain point on screen by modifying the field of view and rotating the view of the camera as to keep that point/object in the same place on screen while zooming ? Changing the camera position is not allowed. I projected the 3D pos of the object on screen and remembered it. Then on each frame I calculate the direction to it in camera space and then I construct a rotation matrix to align this direction to Z axis (in cam space). After this, I calculate the direction from the camera to the object in world space and transform this vector with the matrix I obtained earlier and then use this final vector as the camera's new direction. And it's actually "kinda working", the problem is that it is more/less off than the camera's rotation before starting to zoom depending on the area you are trying to zoom in (larger error on edges/corners). It looks acceptable, but I'm not settling for only this. Any suggestions/resources for doing this technique perfectly? If some of you want to explain the math in detail, be my guest, I can understand these things well.

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• Interesting 3d zooming technique

  - by stark

  Is it possible to zoom to a certain point on screen by modifying the field of view and rotating the camera as to keep that point/object in the same place on screen while zooming ? Changing the camera position is not allowed.. I projected the 3d pos of the object on screen and remembered it. Then on each frame I calculate the direction to it in camera space and then I construct a rotation matrix to align this direction to Z axis (in cam space). After this, I calculate the direction from the camera to the object in world space and transform this vector with the matrix I obtained earlier and then use this final vector as the camera's new direction. And it's actually "kinda working", the problem is that it is more/less off than the camera's rotation before starting to zoom depending on the area you are trying to zoom in (larger error on edges/corners). It looks acceptable, but I'm not settling for only this. Any suggestions/resources for doing this technique perfectly ? If some of you want to explain the math in detail, be my guests, I can understand these things well. Thanks. Edit: I'll check often for responses, I'm really curious about this :D

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• Windows 8 and Cisco AnyConnect client issue

  - by Enrique Lima

  As many of us are doing these days, I have fully moved to Windows 8 on my PCs (laptops and desktops).  And in my role as a consultant I work with many clients, many of them use different vpn technologies.  While pretty much every single vpn client I had installed needed a trick or two to work, well Cisco’s AnyConnect vpn client had some issues.  Installation went well, no problem there.  The problem appeared when I attempted to connect, as I received the following message: Pretty clear what the issue is, right? right??!!?? Doing a bit of research (Google knows!), I cam across the following fix: Using our new favorite shortcut:  Windows Key + X Then Run > regedit. We then Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vpnva From the image you can tell there are additional characters in the DisplayName that interfere with the device being able to be correctly identified. This is what it looks like originally. We will remove those characters so it looks more like: Close all open windows and attempt your connection.

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• Laser range finder, what language to use? Beginner advice

  - by DrOnline

  I hope this is the right place. I am a programming beginner, and I want to make a laser range finder, and I need advice about how to proceed etc. In a few weeks I will get a lot of dirt cheap 3-5V lasers and some cheap usb webcams. I will point the laser and webcam in parallel, and somehow use trigonometry and programming to determined distance. I have seen online that others made done it this way, I have purposefully not looked at the details too much because I want to develop it on my own, and learn, but I know the general outline. I have a general idea of how to proceed. The program loads in a picture from the webcam, and I dunno how images work really, but I imagine there is a format that is basically an array of RGB values.. is this right? I will load in the red values, and find the most red one. I know the height difference between the laser and the cam. I know the center dot in the image, I know the redmost dot. I'm sure there's some way to figure out some range there. TO THE POINT: 1) Is my reasoning sound thus far, especially in terms of image analysis? I don't need complete solutions, just general points 2) What I need to figure out, is what platform to use. I have an arduino... apparently, I've read it's too weak to process images. Read that online. I know some C I know some Python I have Matlab. Which is the best option? I do not need high sampling rates, I have not decided on whether it should be automated or whether I should make a GUI with a button to press for samples. I will keep it simple and expand I think. I also do not need it to be super accurate, I'm just having fun here. Advice!

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• Drawing a rectangle on a video in C#

  - by Haxed

  Hi I want to draw a rectangle on a video stream(web cam video or loaded saved video) that I have streaming on a picture box. This is a C# application and I am using EmguCV 2.1.0.0. I have been successful in displaying the video stream on the picturebox in the form. Can I use Emgucv to draw on the video or should I use something else ? Can I use Dshownet or something like that ? Thanks for taking the time to read this. Many Thanks

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• Creating an image from webcam every x miliseconds

  - by Rita

  Hello everyone, I am using c# to integrate with a web cam. I need to generate a snapshot image every x miliseconds and save it to file. I already have the code up and running to save to file on a button click event, however I wonder what am I supposed to do when taking snapshots in the background - Should this be multi threaded? I'm honestly not sure. I could just block the UI thread, put Thread.Sleep and then just take the snapshot, but I don't know if this is right. I thought of using a background worker, but I am now experiencing cross threaded difficulties with SendMessage... So I wonder if I should even go and bother to multi-thread or just block the UI. Help greatly appertained, thanks in advance.

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• Optimal preferences for prefix queries with Oracle catalog (CTXCAT) index

  - by nw

  The documentation for Oracle Text gives this example of a prefix/substring preference setting for context and catalog indexes: begin ctx_ddl.create_preference('mywordlist', 'BASIC_WORDLIST'); ctx_ddl.set_attribute('mywordlist','PREFIX_INDEX','TRUE'); ctx_ddl.set_attribute('mywordlist','PREFIX_MIN_LENGTH', '3'); ctx_ddl.set_attribute('mywordlist','PREFIX_MAX_LENGTH', '4'); ctx_ddl.set_attribute('mywordlist','SUBSTRING_INDEX', 'YES'); end; What I need to know is whether the substring_index attribute is necessary if I only ever issue prefix searches, such as: SELECT title FROM auction WHERE CATSEARCH(title, 'cam*', '') > 0; TITLE --------------- CANON CAMERA FUJI CAMERA NIKON CAMERA OLYMPUS CAMERA PENTAX CAMERA SONY CAMERA 6 rows selected

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• What is the difference between building a WSDL in Eclipse and using WCF?

  - by myermian

  I'm somewhat familiar with WCF in that I can build Web Services in VS.Net ... I understand some of the concepts... But, the other day I cam across this option in Eclipse (I also use Java to code) to create a WSDL. Playing around with it it looks great since it has a GUI method of building itself. I guess I just wanna know what the difference is. 1) Are they different technologies like WSDL vs WCF? Or, is it that WCF uses WSDLs? 2) I read that WSDLs are a top-down approach... so what about WCF, is that top-down or is that bottom-up? 3) Will this WSDL in Eclipse actually be able to generate CSharp code for my server and client efficiently, or will it require a lot of fixing?

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• OpenCv QT CvNamedWindow IplImage not working

  - by Shahzaib

  I have problem with displaying Cam on QTLabel using openCV, Every thing is working fine . except one . I have to call function from open === cvNamedWindow() == in order for program to work properly . its displaying the webcam on the QLabel no problem but if i don't call the cvNamedWindow function then the program is just hanging its just keep displaying the camera which are working on the screen but i can't click on any thing else its getting freeze. doest any one has any idea why its happening and what i am doing wrong ?

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• How to build a Video Broadcaster, which can handle more than 20,000 viewers

  - by Gaurav Srivastava

  I want to broadcast Video from a web cam, over internet. The problem is, the Video will be viewed live by more than 20,000 people (expected). I have a very little experience with Red5 Broadcasting. I did some broadcasting using Red5 and Flash. It works fine for 1 or 2 viewers i.e. it is great for personal chatting/ video conferencing applications. But, when the number of viewers increases, the delay in Broadcasting also increases. I am experiencing a Delay addition of about 0.5 Seconds for every new user who joins the broadcast. Can any one suggest me some, better technologies on which I can work out this Live Broadcasting. I don't want to use http://www.ustream.com; I want to create one of my own, such tool. But thats always the last solution.

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• [WM6] Owner of a component. What exactly is this for?

  - by kornelijepetak

  I am developing an app for Windows Mobile 6 and there is a CameraCaptureDialog class that enables me to call a camera app from my own application. The class has an Owner property that most examples on the internet set to "this". cam.Owner = this; What exactly does this do? I've seen a similar scenario with Windows Forms components/controls by setting the Parent control. In that case I guess it's used only for layout algorithms, but other than that, is there any useful purpose? I don't see how setting an owner of the CameraCaptureDialog can (and actually does not) make any difference (at least not a visible one). Any insight would be appreciated.

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• Nesting maximum amount of shapes on a surface

  - by Fuu

  In industry, there is often a problem where you need to calculate the most efficient use of material, be it fabric, wood, metal etc. So the starting point is X amount of shapes of given dimensions, made out of polygons and/or curved lines, and target is another polygon of given dimensions. I assume many of the current CAM suites implement this, but having no experience using them or of their internals, what kind of computational algorithm is used to find the most efficient use of space? Can someone point me to a book or other reference that discusses this topic?

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• Build Interactive Floor With Projection !?

  - by Synxmax

  Dear Guys I am somehow newbie and sometimes guru , but at this moment i don't have enough time to research My nightmare is , my boss ask me to create an interactive floor ( he just saw in an exhibition ) , he ask me to create one of them instead of buying , i am an actionscript crawler and developer with some skills in java and c# programming , i just made some track motion with a simple web cam , and this idea came to my mind if i can use an infrared or thermographic camera instead of simple camera so i can get better positioning if camera place at top of floor ! Now i just came here to ask you guys is there any resource , tip , help i can know before getting into this deal !? is there any lib or api out to deal with this ?! EVEN, if there is any resource , article from another language c++ , c , .... could help i just didn't have enough time to test lot of ways If you search interactive floors , or interactive floor projection you can find some companies who provide such a thing Thanks in advance ( and sorry for my damn poor english , français could be better :D )

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• Control webcam from C#

  - by Moulde

  Hi I have a Creative Life CAM Optia AF webcam, the software included in the package is able to control the camera in different ways, like set autofocus to auto or manual, and a bunch of gamma and brightness settings. I'm capturing the feed with the AForge Computer vision library, and it's working great. But i would like to be able to set the manual focus from inside my application. Ive been searching for a tutorial, but come up empty handed. Can i somehow either disassemble the included software, or is there some way to fetch the traffic / instructions being sent to the device? Thanks in advance.

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• What is the best way to learn VB/VBA?

  - by Noah

  I have wanted to learn VB and VBA for a long time. My school offers a coarse, but it doesn't fit with the rest of my schedule. It will be my first programing language. I was considering using the textbook my school uses (An introduction to programing using visual basic 2008, but I wold get the 2010 version), but I was wondering if there were better resources I could use. I mainly want to lean to learn VBA so I cam create macros and other tools for MS Word. Please understand that this is the fist time I will be programming and I am teaching myself (with the books/online resources).

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• Jquery UI Datepicker Date Range Inline Problem

  - by codeworxx

  Hey Guys, i have a big Problem with jQuery UI Datepicker. I have two Input Fields "From Date" and "To Date". When i choose a From Date - a Daterange of only 5 Days should appear on the "To Date" Picker. I used the Code from "Russ Cam" http://stackoverflow.com/questions/330737/jquery-datepicker-2-inputs-textboxes-and-restricting-range It worked perfect. Now my Problem: I have a second Calendar which is INLINE, means no Input Fields - it's shown directly on the Page - with "From Date" and "To Date". In this Calendar the Script does not work! All Fields in "From Date" and in the "To Date" are available - no Date Range Restrictions or something else. What's wrong here? Can someone give me a hint?

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• Emails going into junk and spf records

  - by user346443

  Hi, our emails are being flagged as junk. I have two different webistes both with their own dedicted ip address. sitea.com = xx.xx.xx.43 siteb.com = xx.xx.xx.44 Im using hmailserver to host our emails and have the smtp bound to the ip address of xx.xx.xx.42 im aware that i can set up a spf record to state that the what servers emails can be sent from v=spf1 mx ip4:xx.xx.xx.43 mx:mail.sitea.com ip4:xx.xx.xx.42 -all Would the fact that email are not sent from the sites ip's be causing them to be flagged as junk. Cheers Cam

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• Fitting maximum amount of shapes on a surface

  - by Fuu

  In industry, there is often a problem where you need to calculate the most efficient use of material, be it fabric, wood, metal etc. So the starting point is X amount of shapes of given dimensions, made out of polygons and/or curved lines, and target is another polygon of given dimensions. I assume many of the current CAM suites implement this, but having no experience using them or of their internals, what kind of computational algorithm is used to find the most efficient use of space? Can someone point me to a book or other reference that discusses this subject?

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