Here is pen
I want to apply drop shadow effect on rect, when rect is hidden using one of the following technique:
opacity:0 // or
fill:rgba(1,1,1,0) // or
fill-opacity:0 // or
display:none
when I trying to apply filter on such elements, shadow not appearing at all...
Is it possible to apply drop shadow on hidden Svg paths? How?
The simplest way is by using a mask.
In the demo below we have added a drop shadow to a circle. Then we construct the mask so that it hides the circle itself, but keeps the area outside the circle (ie the shadow). Revealing the red rectangle behind it.
<svg width="200" height="200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="shadow">
<feDropShadow dx="4" dy="8" stdDeviation="4"/>
</filter>
<mask id="invisible">
<rect width="100%" height="100%" fill="white"/>
<circle cx="50%" cy="50%" r="80" fill="black"/>
</mask>
</defs>
<rect x="40" y="60" width="150" height="80" fill="red"/>
<circle cx="50%" cy="50%" r="80"
style="fill:blue; filter:url(#shadow); mask: url(#invisible);"/>
</svg>
If you're just looking for a drop shadow with no rect, setting the fill to the background color will work:
.square{
fill:#fff;
width:100px;
height:100px;
filter:url('#drop-shadow');
}
If you've got multiple elements under the rect, you could try hiding just the filled in area with a clip-path or mask.
Related
I have a circular, image mask set up in HTML to cover an image.
Here is that code for reference:
<div id="group-focus">
<svg height="800" viewbox="0 0 1000 800">
<defs>
<mask id="text-mask" maskUnits="userSpaceOnUse"
maskContentUnits="userSpaceOnUse">
<circle cx="600" cy="400" r="400" fill="white">
</mask>
</defs>
<!-- this is the image that I masked -->
<g mask="url(#text-mask)">
<image id="text-focus" width="2560" height="1440"
y="0" x="0" xlink:href="img/Asset13x.png" />
</g>
</svg>
</div>
Because I have the mask size set in HTML to the size I want, I am unsure of how to go about expanding the mask to a different size. Can you animate a mask in Javascript? This is for a motion graphic project I am working on currently.
Thanks!
This below code works fine in chrome and filter is applied but fails in firefox. An extra space is also added by direct inclusion of svg definition in the html(This is present in all browsers). Not sure why its happening like this. Can someone let me know the issue, I am new to svg
Here is the codepen link: http://codepen.io/susheel61/pen/wJYgwr
<svg version="1.1" id="ThemeSvg">
<defs>
<g>
<!--/* Polygon definitions for overlay shape */-->
<rect id="red-poly" x="0%" y="0%" width="53%" height="100%" fill="#b5121b" transform="skewX(-10)"></rect>
<rect id="rect-fade-out" x="0%" y="0%" width="53%" height="100%" fill="url(#fade-out)" transform="skewX(-10)"></rect>
</g>
<g>
<filter id="red-angled-overlay" x="0%" y="0%" width="100%" height="100%">
<!--/* Bring in the mask for fading the image out */-->
<feImage xlink:href="#rect-fade-out" result="red-overlay" x="0" y="0"></feImage>
<!--/* Create composite of image and fade mask */-->
<feComposite in="SourceGraphic" in2="red-overlay" operator="out" result="composite"></feComposite>
<!--/* Bring in the colored polygon for the overlay */-->
<feImage xlink:href="#red-poly" result="overlay" x="0" y="0"></feImage>
<!--/* Blend the overlay with the faded image */-->
<feBlend in="composite" in2="overlay" mode="multiply"></feBlend>
</filter>
</g>
</defs>
</svg>
<svg version="1.1" viewBox="0 0 840 474" preserveAspectRatio="xMaxYMin slice">
<image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://wowslider.com/sliders/demo-10/data/images/autumn_leaves.jpg" width="100%" height="100%" filter="url(#red-angled-overlay)" class="svg-black-overlay"></image>
</svg>
Firefox does not support feImage filters where the image is a fragment. It only supports feImage where the image is a complete standalone image or a data URI of a complete SVG document.
You'd have to create two additional standalone SVG images one with each polygon definition in and point the feImage elements at the complete image document in each case.
I am studying some basic image manipulations with SVG and trying to find optimal approach for the following challenge:
We have one SVG file which has various SVG elements (circles, rectangle, triangle). They all are overlapping each other creating new "areas" of different forms (see pic).
So filling actual Elements - no problem there. But what if I want to fill with color only specific intersect area?
My current thinking was:
Consider drawing all elements as Paths, then see if I can treat overall composition as One large path and then play with fill-rule.
Consider calculating the area shape and drawing a new shape on top of it, then fill it.
Consider something else?
Michael's filter method is cool and tricky, but perhaps a little hard to understand.
You can also do it with masks.
<svg width="391" height="400">
<defs>
<!-- define the shapes in the image, which we will use for the outlines
and for creating intersection masks -->
<rect id="square" x="92" y="48" width="218" height="218"/>
<polygon id="triangle" points="54,366 277,366 165,142"/>
<circle id="circle" cx="256" cy="264" r="85"/>
<!-- the masks -->
<!-- white parts are visible, black parts are invisible -->
<mask id="square-minus-triangle">
<!-- square with triangle cut out of it -->
<use xlink:href="#square" fill="white"/>
<use xlink:href="#triangle" fill="black"/>
</mask>
<mask id="triangle-minus-square">
<!-- triangle with square cut out of it -->
<use xlink:href="#triangle" fill="white"/>
<use xlink:href="#square" fill="black"/>
</mask>
</defs>
<!-- background -->
<rect width="100%" height="100%" fill="#e5e4da"/>
<!-- the intersection shapes (yellow) -->
<!-- first draw the circle, but use the square-minus-triangle mask.-->
<use xlink:href="#circle" fill="#e4e400" mask="url(#square-minus-triangle)"/>
<!-- draw the circle again, but use the triangle-minus-square mask.-->
<use xlink:href="#circle" fill="#e4e400" mask="url(#triangle-minus-square)"/>
<!-- draw the outlined shapes -->
<g fill="none" stroke="black" stroke-width="6">
<use xlink:href="#square"/>
<use xlink:href="#triangle"/>
<use xlink:href="#circle"/>
</g>
</svg>
You can do this with filters. An easy way to do is to use near transparent fill and then use a filter to dial the non-overlapping areas to fully transparent and the overlapping areas to fully opaque. It makes the stroke a little crispy though.
<svg height="600px" width="800px">
<defs>
<filter id="opacitychange">
<feComponentTransfer>
<feFuncA type="linear" intercept="-.05"/>
</feComponentTransfer>
<feComponentTransfer>
<feFuncA type="gamma" amplitude="4" exponent=".4"/>
</feComponentTransfer>
</filter>
</defs>
<g filter="url(#opacitychange)">
<circle stroke="black" fill="blue" fill-opacity="0.05" cx="150" cy="150" r="100"/>
<rect stroke="black" x="200" y="100" width="100" height="300" fill="blue" fill-opacity="0.05"/>
<polygon stroke="black" points="50,50 50,400 300,400" fill="blue" fill-opacity="0.05"/>
</g>
</svg>
Good afternoon everyone,
I'm defining an SVG on my page with the following defs.
<svg width="0" height="0">
<defs>
<g id="stroke-hexagon">
<polygon fill="#002663" stroke="#FFFFFF" stroke-width="6" stroke-miterlimit="12" points="57.8,185 5.8,95 57.8,5 161.8,5 213.8,95 161.8,185 "/>
</g>
<g id="hexagon">
<polygon fill="#006890" points="52,180 0,90 52,0 156,0 208,90 156,180 "/>
</g>
</defs>
</svg>
...and implementing it later in the HTML using this:
<svg width="208px" height="180px" viewBox="0 0 208 180" >
<use xlink:href="#hexagon"></use>
<text class="faicon" x="50%" y="70px" fill="white" font-size="80px" text-anchor="middle"></text>
<text text-anchor="middle" x="50%" y="70%" fill="white">Logo Here</text>
</svg>
Works totally fine. I am also able to style the polygon's fill with simple CSS. Looks like this:
#hexagon:hover polygon {
fill:#990000;
}
The hover effect fails, however, whenever the mouse leaves the polygon and instead hovers over either of the 'text' elements within the svg. Is there a way to define a CSS rule that prevents this behavior. Or, would it be better (easier) to change the attribute using JS / jQuery?
Thanks!
Your texts are rendered on top of your polygon and are therefore intercepting mouse events. You should set up a css rule like
text {
pointer-events: none;
}
This will prevent the text from becoming a target of mouse events which should give you the desired hover effect for the polygon.
I have some SVG elements grouped together in a <g> element. I just want to style that <g> element to show grouping of elements. Like I want to give some background-color and a border to it. How it would be achieved?
I tried fill and stroke attribute to <g> element, but it doesn't work. How it would be possible?
Sample Here
<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">
<g fill="blue" stroke="2">
<rect id="svg_6" height="112" width="84" y="105" x="136" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="5" stroke="#000000" fill="#00ff00"/>
<ellipse fill="#FF0000" stroke="#000000" stroke-width="5" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" cx="271" cy="156" id="svg_7" rx="64" ry="56"/>
</g>
</svg>
You cannot add style to an SVG <g> element. Its only purpose is to group children. That means, too, that style attributes you give to it are given down to its children, so a fill="green" on the <g> means an automatic fill="green" on its child <rect> (as long as it has no own fill specification).
Your only option is to add a new <rect> to the SVG and place it accordingly to match the <g> children's dimensions.
You actually cannot draw Container Elements
But you can use a "foreignObject" with a "SVG" inside it to simulate what you need.
http://jsfiddle.net/VBmbP/4/
<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">
<foreignObject id="G" width="300" height="200">
<svg>
<rect fill="blue" stroke-width="2" height="112" width="84" y="55" x="55" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000"/>
<ellipse fill="#FF0000" stroke="#000000" stroke-width="5" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" cx="155" cy="65" id="svg_7" rx="64" ry="56"/>
</svg>
<style>
#G {
background: #cff; border: 1px dashed black;
}
#G:hover {
background: #acc; border: 1px solid black;
}
</style>
</foreignObject>
</svg>
I know its long after this question was asked and answered - and I am sure that the accepted solution is right, but the purist in me would rather not add an extra element to the SVG when I can achieve the same or similar with straight CSS.
Whilst it is true that you cannot style the g container element in most ways - you can definitely add an outline to it and style that - even changing it on hover of the g - as shown in the snippet.
It not as good in one regard as the other way - you can put the outline box around the grouped elements - but not a background behind it. Sot its not perfect and won't solve the issue for everyone - but I would rather have the outline done with css than have to add extra elements to the code just to provide styling hooks.
And this method definitely allows you to show grouping of related objects in your SVG's.
Just a thought.
g {
outline: solid 3px blue;
outline-offset: 5px;
}
g:hover {
outline-color: red
}
<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">
<g>
<rect fill="blue" stroke-width="2" height="112" width="84" y="55" x="55" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000"/>
<ellipse fill="#FF0000" stroke="#000000" stroke-width="5" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" cx="155" cy="65" id="svg_7" rx="64" ry="56"/>
</g>
</svg>
The style that you give the "g" element will apply the child elements, not the "g" element itself.
Add a rectangle element and position around the group you wish to style.
See: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/g
EDIT: updated wording and added fiddle in comments.