ios - SpriteKit - SKEffectnode Blendmode, Rasterisation, and Frame Rate -


i'm trying simple lighting in side scrolling game using skeffectnode. first make fullscreen sprite node gray color, set it's blend mode additive, , add child effect node. add sprite nodes light texture, children of effect node. set effect node's blend mode multiply, , add child scene. this:

skeffectnode *effectnode = [[skeffectnode alloc] init]; skspritenode *overlay = [skspritenode spritenodewithcolor: [skcolor graycolor] size: [self.size]; skspritenode *light = [skspritenode spritenodewithimagenamed: @"lighttexture.png"]; [overlay setblendmode: skblendmodeadd]; [light setblendmode: skblendmodeadd]; [effectnode addchild: overlay]; [effectnode addchild: light]; [effectnode setblendmode: skblendmodemultiply]; [self addchild: effectnode];

so problem effect node's blend mode doesn't seem doing anything. it's stuck in alpha blend mode or something. however, if set shouldrasterize yes, blend mode starts working expected. know why is?

also adding fullscreen effect this, effect node, totally destroys frame rate. if start moving effect node (or create new 1 every frame). don't see other way of doing lighting in sprite kit. want create lighting mask every frame, , multiply scene's frame buffer. possible using sprite kit? or should cocos2d using custom shaders?


Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

javascript - jQuery show full size image on click -

pretty self explanatory not workking . i want display full image when user click on image... yes know there tons of plugins but i want keep simple. any idea ? css : .full { display: none; width: 500px; height: 500px; margin-left: 100px; margin-top: -300px; position: fixed; background-color: #f00; z-index: 6; } .thumbnail { width: 50px; height: 50px; } html: <img class="thumbnail" src="http://4.bp.blogspot.com/-uhbdp2esxng/txneptvi92i/aaaaaaaaaky/upfqis7zto0/s1600/rihanna-wallpaper.jpg"> jquery: $(document).ready(function() { $('.thumbnail').on('click', function() { var img = $('<img />',{src:this.src,'class':'full'}); $('.full').html(img).show(); console.log('done!'); }); }); try looking how jquery works. $(document).ready(function() { $('.thumbnail').on('click', function(...
Read more