I have the following SVG document:
<svg preserveAspectRatio="xMinYMin meet" viewBox="0 0 21 484" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="dropShadow">
<feDropShadow dx="4" dy="0" stdDeviation="4"></feDropShadow>
</filter>
</defs>
<g id="Artboard" stroke-width="5" stroke="#FF0000" fill="#000000" stroke-linecap="round">
<path style="filter: url(#dropShadow)" d="M7.5,8.5 L7.5,471.5" id="path-1"></path>
</g>
</svg>
In Firefox, when I open the SVG document, it simply shows a very thin (not 5 wide) vertical line. In Chrome, it doesn't show anything (nor does it in codepen, here: https://codepen.io/jwir3/pen/BJBqEK ).
I'm not quite sure what I'm doing incorrectly here, but it has something to do with the filter, because, if I remove the filter: url(#dropShadow) from the path definition, the line shows up as expected.
You can't use objectBoundingBox units if your shape has no height or width.
Keyword objectBoundingBox should not be used when the geometry of the applicable element has no width or no height, such as the case of a horizontal or vertical line, even when the line has actual thickness when viewed due to having a non-zero stroke width since stroke width is ignored for bounding box calculations. When the geometry of the applicable element has no width or height and objectBoundingBox is specified, then the given effect (e.g., a gradient or a filter) will be ignored.
The default for filterUnits is objectBoundingBox units so you need to change that to userSpaceOnUse i.e.
<svg preserveAspectRatio="xMinYMin meet" viewBox="0 0 21 484" xmlns="http://www.w3.org/2000/svg">
<title>Line Drop Shadow</title>
<description>A red line with 5px width thickness and round caps, having a drop-shadow. This highlights the regression documented in PURP-1017.</description>
<defs>
<filter id="dropShadow" filterUnits="userSpaceOnUse">
<feDropShadow dx="4" dy="0" stdDeviation="4"></feDropShadow>
</filter>
</defs>
<g id="Artboard" stroke-width="5" stroke="#FF0000" fill="#000000" stroke-linecap="round">
<path style="filter: url(#dropShadow)" d="M7.5,8.5 L7.5,471.5" id="path-1"></path>
</g>
</svg>
When processing filters, different browsers process in different stroke.
Chrome considers stroke as a value with a zero pixel, so it does not include it in the filter region.
Therefore, to make the result look the same in different browsers, it is better to replace path with stroke-width ="5", a rectangle with a width of 5px withoutstroke (stroke="none")
In addition, the default values for the filter area are: x =" - 10% "" y = "- 10%" `` width = "120%" `` height = "120%"- large blur sizes are usually truncated .
By default, filterUnits = "objectBoundingBox" and therefore the values are specified in percentages.
To make it easier to calculate the size of the filter region action, specify the value offilterUnits = "userSpaceOnUse" and then you can specify all dimensions for thefilter region` in pixels.
<svg preserveAspectRatio="xMinYMin meet" width="100%" height="100%" viewBox="0 0 21 484" xmlns="http://www.w3.org/2000/svg" >
<defs>
<filter id="dropShadow" filterUnits = "userSpaceOnUse" x="4" y="0" width="12" height="472">
<feDropShadow dx="6" dy="4" stdDeviation="3"></feDropShadow>
</filter>
</defs>
<g id="Artboard" fill="#FF0000" filter="url(#dropShadow)" >
<!-- <path style="filter: url(#dropShadow)" d="M7.5,8.5 L7.5,471.5" id="path-1" stroke-width="5" ></path>-->
<rect x="5" y="5" width="5" stroke="none" height="463" />
</g>
</svg>
Swapping to userSpaceOnUse is the correct answer in most circumstances but has the following limitations:
The filter effects region will apply from -10% to 120% of the canvas, rather than the bounding box of the element (using more memory and processing time)
For large dynamic SVGs (such as created by d3) it can be hard to calculate the required filter x/y/width/height to ensure the filter applies to all elements.
An alternate (less elegant) solution is to apply the filter to a <g> and use a hidden node within this to give the group the correct width or height:
<svg xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="dropShadow" width="20">
<feDropShadow dx="4" dy="0" stdDeviation="4"></feDropShadow>
</filter>
</defs>
<g id="Artboard" style="filter: url(#dropShadow)">
<circle r="5" cx="0" cy="0" visibility="hidden"></circle>
<path d="M10,10 L10,100" stroke-width="5" stroke="#FF0000" fill="#000000" stroke-linecap="round"></path>
</g>
</svg>
I'm creating Raspberry Pi WiFi controlled webcam robot. I've created a responsive window for the webcam feed, but I am unable to create the joystick buttons to control my robot.
This is the type of joystick I want to display below the feed:
How can I achieve it?
One possibility would be to use SVG:
It is a scalable vector image format (SVG stands for Scalable Vector Graphic), so it will adapt to different sizes without pixelizing or getting blurry.
SVG elements support interactivity and animations: so you could have click event listeners in the arrows and center button.
It is supported by all modern browsers (desktop and mobile).
Here is a demo with a controller similar to the one you have. Click on the "Full page" button to see how it grows and adapts to the width of the parent (20% of the screen) scaling without issues and keeping all the hot spots:
<div id="joystick" style="width:20%">
<svg width="100%" height="100%" viewBox="0 0 100 100">
<defs>
<linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
<stop offset="0%" style="stop-color:rgb(16,16,16);stop-opacity:1" />
<stop offset="100%" style="stop-color:rgb(240,240,240);stop-opacity:1" />
</linearGradient>
<linearGradient id="grad2" x1="0%" y1="0%" x2="0%" y2="100%">
<stop offset="0%" style="stop-color:rgb(240,240,240);stop-opacity:1" />
<stop offset="100%" style="stop-color:rgb(16,16,16);stop-opacity:1" />
</linearGradient>
<linearGradient id="grad3" x1="0%" y1="0%" x2="0%" y2="100%">
<stop offset="0%" style="stop-color:rgb(168,168,168);stop-opacity:1" />
<stop offset="100%" style="stop-color:rgb(239,239,239);stop-opacity:1" />
</linearGradient>
</defs>
<circle cx="50" cy="50" r="50" fill="url(#grad1)" />
<circle cx="50" cy="50" r="47" fill="url(#grad2)" stroke="black" stroke-width="1.5px" />
<circle cx="50" cy="50" r="44" fill="url(#grad3)" />
<circle cx="50" cy="50" r="20" fill="#cccccc" stroke="black" stroke-width="1px" onclick="alert('CENTER');" />
<path d="M50,14 54,22 46,22Z" fill="rgba(0,0,0,0.8)" onclick="alert('UP');" />
<path d="M50,86 54,78 46,78Z" fill="rgba(0,0,0,0.8)" onclick="alert('DOWN');" />
<path d="M14,50 22,54 22,46Z" fill="rgba(0,0,0,0.8)" onclick="alert('LEFT');" />
<path d="M86,50 78,54 78,46Z" fill="rgba(0,0,0,0.8)" onclick="alert('RIGHT');" />
</svg>
</div>
You can use Image map for your joystick buttons. In image map you can use image as a buttons, you need to define coordinates of the images to make it clickable. You can take reference from http://www.w3schools.com/tags/tag_map.asp . To make it responsive you can use Media Query. For reference go through http://www.w3schools.com/css/css_rwd_mediaqueries.asp
iam currently trying to get a pinch to zoom animation done, with two different svg graphics. Is there a way, to transform or blend the first svg image into the second one, without using javascript, and maybe even without css?
<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 18.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<svg version="1.1" id="Ebene_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="100px" height="100px" viewBox="-13 15 100 100" enable-background="new -13 15 100 100" xml:space="preserve">
<g id="Ebene_11">
<path fill="#010202" d="M78.5,93.1l0.8,1.4l-24.3,10l-0.4-1.4c0,0-0.8-2.6-3-4.2C49.7,97.4,29.7,81.2,30.2,75
c0.3-3.2-0.8-5.4-1.6-7c-0.7-1.3-1.3-2.5-0.7-3.7c0.4-0.9,1.3-1.5,2.6-1.7c1.8-0.3,4.8,0.3,6.8,2.5c1.7,1.8,2.8,4.8,3.9,7.7
c0.2,0.5,0.6,1.4,1,1.8c2.4,2.9,4.2,2.6,6,0.8c1.9-1.9,1.6-13.6-0.8-15c-1.8-1-4-1-6.8-1.9c-2.9-0.9-6.1-1.7-5.9-5.2
c0.3-1.6,0.7-2.4,2.8-3.2c4.7-1.8,14.9-2.2,19.5,2.5c1.2,1.2,2.2,1.8,2.8,3.1c0.7-0.4,2.3-1.1,3.4-1.1c3.8,0,14.4,16.8,14.5,16.9
c1.4,2.6-0.3,12.5-0.9,15.5C76.5,89.1,78.5,93.1,78.5,93.1z M56.6,100.9l18.8-7.8c-0.7-1.6-1.7-4.3-1.2-6.6
c1.1-5.7,1.8-12.5,1.2-13.7c-1.7-3.1-10.1-14.7-12.2-15.5c-0.8,0-1.3,0.4-1.6,0.6c0.4,1.2,0.6,2.4,0.9,3.4c0.3,1.4,0.6,2.6,1,3.6
c0.3,0.7,0,1.5-0.7,1.8c-0.7,0.3-1.5,0-1.8-0.7c-0.6-1.3-0.9-2.7-1.2-4.2c-0.3-1.2-0.5-2.5-1-3.7c0,0,0-0.1-0.1-0.1
c-0.6-1.6-2-2.8-3.4-4.3c-3.7-3.7-12.8-3.3-16.6-1.8c-1.6,0.6-1.7,1.5-1.7,1.7c-0.1,1.1,1,1.6,4.1,2.6c3.2,1,7.8,0.8,9.6,4.6
c0.3,0.6,0.9,3.6,0.9,4.6c0.4,8.3-0.2,10.8-4.3,13.2c-3.1,1.2-7.2-0.9-8.8-5.1c-1-2.6-2-5.4-3.3-6.8C34,65.4,32.3,65,31.3,65
c-0.5,0-0.8,0.1-0.9,0.2c0.1,0.3,0.4,0.9,0.6,1.4c0.9,1.8,2.2,4.5,1.9,8.4c-0.4,4.6,15.3,17.5,20.3,21.4
C55,98,56.6,100.9,56.6,100.9z">
<animate id="animation1"
attributeName="opacity"
from="1" to="0" dur="2s"
style="opacity:0"
repeatCount="1" />
</path>
</g>
<g>
<path style="opacity:0" d="M76.9,87.2c0.5-2.9,2.1-12.7,0.8-15.2c-0.1-0.2-10.6-16.5-14.3-16.5c-0.9,0-1.6,0.2-2.3,0.5c-0.5-2.9-1-6-1.2-8.5
c-0.4-5.3-1.3-8.5-4.9-8.9c-0.5-0.1-1.3,0-2.1,0.7c-2.1,2-3.3,8.3-2.8,16.2c0.6,12.3-1.1,20.5-3.2,21.3c-1.3,0.5-4-2.2-6.1-4.3
c-2.1-2.2-4.3-4.4-6.6-5.4c-2.7-1.1-5.5-0.5-7.1,0.5c-1,0.7-1.6,1.6-1.6,2.6c0,1.3,1,2.1,2.1,3.1c1.3,1.1,3.2,2.6,4.3,5.6
c2.1,5.7,18.3,18.5,20.2,20c2.2,1.6,3,4.1,3,4.1l0.4,1.4l23.7-10l-0.8-1.3C77.9,92.2,76.5,89.2,76.9,87.2z M57.2,100.9
c-0.6-1.2-1.6-2.8-3.4-4.1C49,93,36.1,82.3,34.5,78.1c-1.3-3.7-3.6-5.5-5.1-6.8c-0.4-0.3-0.9-0.8-1.1-1c0.1-0.1,0.3-0.3,0.8-0.5
c0.9-0.4,2.6-0.7,4.2,0c1.8,0.7,3.7,2.8,5.7,4.7c3.1,3.2,6,6.2,9,5c5.6-2.3,5.1-18.9,4.9-24c-0.5-8.9,1.2-13.5,2-14.1
c0.9,0.1,2,0.4,2.4,6.4c0.4,5.9,2.3,15.5,3.9,19.2c0.3,0.7,1.1,1,1.8,0.7c0.7-0.3,1-1.1,0.7-1.8c-0.6-1.3-1.3-3.9-2-6.8
c0.3-0.3,0.8-0.6,1.6-0.7c2.1,0.8,10.3,12,12,15.1c0.6,1.1-0.1,7.8-1.1,13.4c-0.5,2.3,0.5,4.9,1.2,6.5L57.2,100.9z">
<animate id="animation2"
attributeName="opacity"
from="0" to="1" dur="3s"
style="opacity:1"
repeatCount="1" />
</path>
</g>
</svg>
Didnt fount much on the aether about it...thanks in advance
got it
just added this to the first image
<animate id="animation1"
begin="0.8s"
attributeName="opacity"
from="1" to="0" dur="0.5s"
fill="freeze"/>
and this to the second one, and voila the animation is played once and stops then.
<animate id="animation2"
begin="0.8s"
attributeName="opacity"
from="0" to="1" dur="1.3s"
fill="freeze"/>
yay :)
I am currently using an SVG gradient to apply a fade-out effect for paths. This allows the path to start at 100% opacity at x0 and fade out to 0% at x1, wherever those may be for the particular path it is applied to:
<svg>
<linearGradient id="gradient_to_transparent" x1="0%" x2="100%">
<stop offset="0" stop-opacity="1"></stop>
<stop offset="1" stop-opacity="0"></stop>
</linearGradient>
<path
d="M 10,30 A 20,20 0,0,1 50,30 A 20,20 0,0,1 90,30 Q 90,60 50,90 Q 10,60 10,30 z"
style="stroke:url(#gradient_to_transparent);"
/>
</svg>
This works great when applying to the stroke style of the above path.
However, the problem is that by using the stroke style I cannot apply other stroke styles and it defaults to black. What I would like is to style the stroke using whatever color I want and then apply a gradient to the stroke-opacity or apply an SVG filter to create the fade-out effect. I tried messing with SVG filters and using feComponentTransfer with feFuncA, but wasn't able to get something that worked right.
The stroke color needs to be individually calculated for each path. So, the solution of setting the color in the gradient wouldn't scale very well.
Does it need to be a gradient or a filter? I would suggest using a <mask> that contains a rect with a gradient applied, but I'm not sure about the requirements you have.
<svg>
<defs>
<linearGradient id="fadeGrad" y2="1" x2="0">
<stop offset="0.5" stop-color="white" stop-opacity="0"/>
<stop offset="1" stop-color="white" stop-opacity=".5"/>
</linearGradient>
<mask id="fade" maskContentUnits="objectBoundingBox">
<rect width="1" height="1" fill="url(#fadeGrad)"/>
</mask>
</defs>
<path
d="M 10,30 A 20,20 0,0,1 50,30 A 20,20 0,0,1 90,30 Q 90,60 50,90 Q 10,60 10,30 z"
fill="green"
stroke="red"
mask="url(#fade)"
/>
</svg>
See a similar example here.