I want to composite a cube over a background while still keeping the alpha channel for the cube. I want the composited image to be a cube over an image. The alpha channel should be only the cube. I would like to use the alpha channel as a mask for further compositing. The problem is that with my current node setup there is a border around the cube.
If I press the "include alpha-button" in the Mix-Color-Node, I get white borders. Otherwise i've got a perfect alpha but no blue background.
I'm currently writing an import script/addon.  The file format is one vertex per line: x, y, z, u, v With 3 lines for each triangle (no quads).  So far I've got vertex's, edges and faces all importing correctly.  Now I just need to import the UV coordinates for each vertex.  However I'm having trouble trying to find a way to do this.  The best result so far was copying code from the UV operator template, which gave me a UV Map, but it puts the whole model at one point. If a ring element is right-invertible, but not left-invertible, then it has infinitely many right-inverses. Let $A$ be a ring and $a\in A$ an element that has a right-inverse but does not have a left-inverse. Show that $a$ has infinitely many right-inverses. How do I reset a lost password (using recovery mode requires me to type the password)? How can I make a peer-to-peer multiplayer game? How can I make a p2p multiplayer game? I would like to have a server-less multiplayer game. But then, how all the clients know each other?  Why the p2p-protocol is so famous in file transfer but not in multiplayer games? "Can not setup lock file:/tmp/g2ipmsg.lock errno : -11 (Resource temporarily unavailable)" I installed IP Messenger (GNOME 2) from Ubuntu software center but its not working. It's always showing an error message on Ubuntu 12.04.  FileName:ipmsg.c Function:create_lock_file Line:157 Can not setup lock file:/tmp/g2ipmsg.lock errno : -11 (Resource temporarily unavailable) Expected Number of coin flips for 2 consecutive heads for first time. I was working on problems on expectation and found this one as a question from a well-known exam  Assume that you are flipping a fair coin, i.e. probability of heads or tails is equal. Then the expected number of coin flips required to obtain two consecutive heads for the first time is.  (A)4  (B)3  (C)6  (D)10  (E)5  I worked up like Let N be the number of tosses required untill 2 consecutive heads are obtained for the first time.  Let the probability of obtaining heads be p and tails be q and for a coin p=q=1-p=1-q.  For N=2, the probability will be $p^2$  For N=3, the probability will be $p^2.q$  For N=4, the probability will be $q^2.p^2$  For N=5, the probability will be $q^3.p^2$  and so on...  Now, $E[N]=2(p^2)+3(p^2.q)+4(q^2.p^2)+5(q^3.p^2)+......$  and this comes out to be $\frac{3}{2}$ but it matches with none of the options.  Please tell me where I am wrong and what should I do to reach the correct solution? Sum of odd Fibonacci Numbers Trying to prove that the sum of odd-index consecutive Fibonacci numbers is the next even-index Fibonacci number. I have a gap in my proof that I cannot figure out. I know that induction would be easier and I have already done it that way, I am looking to use alpha and beta. $$\sum_{i=1}^n F_{2i-1} = F_{2n}$$  $$\begin{align*} \sum_{i=1}^n F_{2i-1}&amp;=\sum_{i=1}^1  \frac{1}{\sqrt{5}}(\alpha^{2i-1}-\beta^{2i-1})\\ &amp;=\frac{1}{\sqrt{5}}\left(\sum_{i=1}^1\alpha^{2i-1}-\sum_{i=1}^1\beta^{2i-1}\right)\\ &amp;\;\;\vdots\\ &amp;=\frac{1}{\sqrt{5}}[(\alpha^n-\beta^n)(\alpha^n+\beta^n)]\\ &amp;=\frac{1}{\sqrt{5}}(\alpha^{2n}-\beta^{2n})\\ &amp;=F_{2n} \end{align*}$$ Append to the end of a file in C The space $ C^1[0,1] $- the space of all continuously differentiable functions on $ [0,1]$ is not a Banach space with respect to the sup norm,$ \|.\|_{\infty} $ since the uniform limit of a continuously differentiable function need not be differentiable.  How can I illustate this statement using a counter example? Can I use $ f_{n}=\frac1 n \sin nx $ as a counter example?  Also, is $ C^1[0,1] $ is same as the space given by $ X=\{f\in C^1[0,1]:f(0)=0 \}$. Can I use the same example to show that this is not a Banach space?  More help is appreciated! Thanks! If we allow that the energy to allow quantum tunnelling through a potential barrier has been borrowed by the Heisenberg energy-time uncertainty relation, from the vacuum energy. How is the borrowed energy paid back? How to add 30 minutes to a JavaScript Date object? This question is regarding the minecraft Beta 1.8 prerelease -- I have a beautiful house in single player survival which I'd like to record while flying.  I want to be able to change the game mode of my survival map to creative to be able to fly through it without installing a mod. I know it is possible if you run the map on a multiplayer server via the command /gamemode &lt;user&gt; 0|1 but I want to achieve this in single player :)  I think this would be possible through editing your level.dat file as I think that's where the game mode for the map is stored. Temporary locks on answers not showing lock duration Tested on Stack Overflow, Stack Overflow Meta and Pets.  Questions  Temporary locks on questions are showing the duration (mod only).  Stack Overflow.   Meta Stack Overflow.   Pets.   Answers  On answers they are not and there's no way to find the lock duration when we use timeline tools to examine the post.  Pets.   Stack Overflow.   Meta Stack Overflow.   Is this something that hasn't been implemented or is it a bug?  If it hasn't been implemented can we please have it implemented? Can we decrypt in this order when the message is encrypted twice? disable comments if array exists This is the code which is registering the function for rewrite_endpoints():   function wpa121567_rewrite_endpoints(){  add_rewrite_endpoint( 'comments', EP_PERMALINK );  add_rewrite_endpoint( 'stats', EP_PERMALINK );  }  add_action( 'init', 'wpa121567_rewrite_endpoints' );   NOTE  I don't know if this matters but I will write it.   I have single-CPT.php which is calling  /inc/post-format/single-CPT.php like this:      &lt;?php while ( have_posts() ) : the_post(); ?&gt;  &lt;?php   get_template_part( 'inc/post-format/single-debate');      ...   This is the code which is checking if array key exists, which is  inside my /inc/post-format/single-cpt.php:   ?php if( array_key_exists( 'comments', $wp_query-&gt;query_vars ) ){  the_field('comments_section');   } elseif( array_key_exists( 'stats', $wp_query-&gt;query_vars ) ) {   the_field('stats_section');   } else { // the request is for the main post  }   ?&gt;   This is my comments.php :       &lt;div id="comments" class="comments-area"&gt; &lt;?php // If CPT and not logged in, display a message: if ( 'debate' == get_post_type() &amp;&amp; ! is_user_logged_in() ) { echo '&lt;p class="must-log-in" style="padding-left:20px; font-size:20px;"&gt;You must be logged in to post a comment.' . '&lt;/p&gt;';  echo do_shortcode("[upme_login]");   } ?&gt;     &lt;?php if ( have_comments() ) : ?&gt;         &lt;h3 class="comments-title"&gt;              &lt;?php                 printf( _n('%d comment', '%d comments', get_comments_number(), 'outbox' ),                     number_format_i18n( get_comments_number() ) );             ?&gt;         &lt;/h3&gt;             &lt;ol class="commentlist"&gt;              &lt;?php                 wp_list_comments( array( 'callback' =&gt; 'outbox_comment' ) );             ?&gt;         &lt;/ol&gt;&lt;!-- .commentlist --&gt;          &lt;?php if ( get_comment_pages_count() &gt; 1 &amp;&amp; get_option( 'page_comments' ) ) : // are there comments to navigate through? If so, show navigation ?&gt;         &lt;nav role="navigation" id="comment-nav-below" class="site-navigation comment-navigation clearfix"&gt;             &lt;div class="nav-previous"&gt;&lt;i class="icon-left-open-1"&gt;&lt;/i&gt;&amp;nbsp;&lt;?php echo get_previous_comments_link( __( 'Older Comments', 'outbox' ) ); ?&gt;&lt;/div&gt;             &lt;div class="nav-next"&gt;&lt;?php echo get_next_comments_link( __( 'Newer Comments', 'outbox' ) ); ?&gt;&amp;nbsp;&lt;i class="icon-right-open-1"&gt;&lt;/i&gt;&lt;/div&gt;         &lt;/nav&gt;&lt;!-- #comment-nav-below .site-navigation .comment-navigation --&gt;         &lt;?php endif; ?&gt;      &lt;?php endif; // have_comments() ?&gt;      &lt;?php         // If comments are closed and there are comments, let's leave a little note, shall we?         if ( ! comments_open() &amp;&amp; '0' != get_comments_number() &amp;&amp; post_type_supports( get_post_type(), 'comments' ) ) :     ?&gt;         &lt;p class="nocomments"&gt;&lt;?php _e( 'Comments are closed.', 'outbox' ); ?&gt;&lt;/p&gt;     &lt;?php endif; ?&gt;     &lt;?php  // Don't output the comment form if CPT and user isn't logged in if ( 'debate' != get_post_type() || is_user_logged_in() ) {  comment_form(); }  ?&gt;  &lt;/div&gt;&lt;!-- #comments .comments-area --&gt; &lt;?php } ?&gt;    This is how the comments template is included  inside my single-CPT.php :  if ( comments_open()  )  comments_template( '', true );   I want to disable comments if if( array_key_exists( 'comments', $wp_query-&gt;query_vars ) ){  How can I do this? Find the determinant of $I + A$ Will Area 51 be supported in the app? Converting LAS 1.4 to 1.2 LIDAR files were released for major part of Slovenia few months back in zlas format. Decompressed LAS format is 1.4 version. I have tried many options how to generate DEMs and had some success in programs and tools but unfortunately they were all trial versions of license pay versions.  Problem is that I can't open and generate DEMs of LAS version 1.4 in many open and free tools (such as MCC-Lidar).   Can you help me converting LAS from 1.4 to 1.2 in some free tool? Or if it is any other way for LAS 1.4. Add the option to do a case-sensitive search I noticed that the search engine does not consider capital letters (just like most regular search engines). However, I have the feeling that in a "coding" context, this could be useful.  For example, searching pages about the standard C library "FILE" struct returns a lot of pages containing the "file" word, that are not (always) relevant.  Is there a way to force keeping capitals? If not, maybe it could be a nice feature to add? Correct ssh config file settings to tunnel to a 3rd machine I'm trying to tunnel to a server via a bridge server. So far, I've been able to get it working from the command shell properly using the following command:  ssh -A -t bridge_userid@bridgemachine.com ssh -A remote_userid@remoteserver.com   But I've been trying to wrap this into my ~/.ssh/config file and I have troubles. I've tried:  Host axp   User          remote_userid   HostName      remoteserver.com   IdentityFile  ~/.ssh/id_rsa.eric   ProxyCommand ssh -A -t bridge_userid@bridge_userid.com ssh -A remote_userid@%h   But when I do, I get the following error message from remoteserver.com and I'm not sure what is causing it:     ksh: SSH-2.0-OpenSSH_6.8^M:  not found   I know that when I log into remoteserver.com , my shell is /usr/bin/ksh.  I've tried to add path arguments to the ssh commands in the config file, but it made no difference.  Any ideas what it can be?