html - Scale an SVG element using a transform origin - 


<html lang="en-us">    <head>      <link rel="stylesheet" href="https://codepen.io/basement/pen/oepkxy.css">    </head>        <body>      <iframe src="https://s.codepen.io/basement/debug/zdpvyv/pnavylzmjrqr"></iframe>            <div class="wrp">          <svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 100 100"             width="100" height="100"             class="canvas"        >           <defs>               <style type="text/css">               polygon { fill: none; stroke-width: 0.5; stroke: #f00; }            </style>                 </defs>                    <g transform="translate( 0 12.5 ) scale( 1 )">                      <polygon               points="                75,6.7                75,93.3                0,50              "               transform="rotate( -30 50 50 )"            />                      </g>                     </svg>      </div>      <script src="origin.js"></script>    </body>  </html>

i want make red triangle in snippet above scale larger while defining specific transform origin. rotate attribute in svg can this:

transform="rotate( -30 50 50 )"

the first value: -30 rotates element counter-clockwise. 50 50 defines transform origin ( x , y respectively ). can scale?. want red triangle scale keep it's origin centered.

note: i know transform-origin in css i'm assuming coordinate system css uses relative whole web page or it's closest positioned element is... want define in svg coordinate terms done rotate property.

you can translate --> scale --> translate_back e.g.

<g transform="translate( 0 12.5 ) translate( 50 50) scale( 1.5 ) translate( -50 -50)">

explanation: assuming use (50 50) scale origin, first translate shape (-50, -50) desired scale origin @ (0, 0). scale, , reverse translation put shape were.


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more