I have the following code:
function preload() {
this.load.svg('table', 'assets/svg/table.svg');
}
function create {
this.add.image(400, 300, 'table');
}
How can I highlight this picture when I hover over it?
You can use the pointerover event like so:
First, declare a variable to hold the svg image.
let tableSvg;
Second, preload the svg image.
function preload() {
this.load.svg('table', 'assets/svg/table.svg');
}
Third, add the svg image to the variable.
tableSvg = this.add.image(400, 300, 'table');
Fourth, set the svg image to be interactive.
tableSvg.setInteractive();
Fifth, add an mouse over event listener like so:
tableSvg.on('pointerover', () => {
console.log(tableSvg)
});
Edit:
You can change the image's color like so:
tableSvg.on('pointerover', () => {
// setTint method takes a color value & change the image's color accordingly
tableSvg.setTint(185273)
});
I've just started playing around with threejs and first thing I'm trying to do is applying textures to models. I am able to load a PNG texture with something like:
var material = new THREE.MeshBasicMaterial({
map: THREE.ImageUtils.loadTexture('textures/wood.png'),
});
object.material = material;
and it fits perfectly to the 3D model without doing anything else. I assume to have exported the .obj with the correct options (as PNG fits perfectly), so I attempted to create the same texture from an SVG instead.
var canvasElement = document.getElementById('svgTexture');
var img = new Image();
img.onload = function() {
canvasElement.getContext('2d').drawImage(img, 0, 0);
var texture = new THREE.CanvasTexture(
canvasElement,
THREE.UVMapping,
THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping,
THREE.LinearFilter, THREE.LinearFilter,
);
material = new THREE.MeshBasicMaterial({
map: texture
});
}
img.src = 'textures/wood.svg';
Unfortunately, the SVG texture gets loaded but mapping is all messed up. It seems Threejs is able to "use" the exported UVMaps if I do use a PNG, whereas It can't with the SVG.
NOTE: both files are the same texture, with same dimensions. Indeed, the PNG was created right from the SVG with SVG Converter (OS X).
I have just upgraded from fabric 1.7 to 2 and now the image object is behaving differently.See the screenshot, the image where the arrow is is completely ignoring the fact that i set a width on it, it looks like it's actually scaling it based on the given height to keep the image ratio. I don't want this to happen, the image needs to stretch to the size i tell it to.
Anyone have any idea to stop it doing this? I mean if i set a width in the options for the image object i expect it to respect those dimensions. It should be stretching to fill where the red box is.
This is happening when loading the image initially as a square and setting {width:1000,height:400} for example, but instead it looks like it's taking the height and scaling the width down to keep it square.
You need to set scaleX for width and scaleY for height. It's a breaking change for v2.
DEMO
var canvas = new fabric.Canvas('c');
var index = 0,
json;
var url = '//fabricjs.com/assets/pug.jpg';
fabric.Image.fromURL(url, function(img) {
var elWidth = img.naturalWidth || img.width;
var elHeight = img.naturalHeight || img.height;
img.set({
scaleX:200/elWidth,
scaleY:200/elHeight
})
canvas.add(img);
})
canvas{
border:2px solid #000;
}
<script type="text/javascript" src="
https://rawgit.com/kangax/fabric.js/master/dist/fabric.js"></script>
<canvas id="c" width="400" height="400"></canvas>
I've been beating around the bush a lot, so I'll explain my problem here and hope with the whole picture, somebody has some ideas. With the following image:
I need to detect a mouseover on the blobs over her eyes and mouth, and solve this problem in a general form. The model and blobs are on two different layers, so I can produce one image with only the blobs, and one with only the model, and somehow synchronise a virtual cursor over the blobs while it actually hovers over the model.
I can also make the blobs polygons, for hit testing, but I think a colour hit test would be much easier. If I hit blue, I am on her mouth and I show lipstick images; if I hit pink, I'm over her eyes, and display eye makeup images.
What are the suggestions and conversation of the learned ones here?
The simpler way to do it would be to load the layer image in a canvas, then get all its pixel data. When the mouse is hovering the model image, find out what color is currently selected and if it is different from a previous one, trigger an event to indicate that the selection has changed.
Here is an example, feel free to toy with it; but be aware that it doesn't handle all cases:
what if the layer and the model image are not the same size
what if the layer and the model image are not the same width/height ratio
what if you want to use some alpha channel (the example doesn't take it into account)
$(function() {
/* we load all the image data first */
var imageData = null;
var layerImage = new Image();
layerImage.onload = function() {
var canvas = document.createElement("canvas");
canvas.width = this.width;
canvas.height = this.height;
context = canvas.getContext('2d');
context.drawImage(this, 0, 0, canvas.width, canvas.height);
imageData = context.getImageData(0, 0, canvas.width, canvas.height).data;
};
/* it's easier to set the image data for example as base64 data */
layerImage.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAOwgAADsIBFShKgAAAABp0RVh0U29mdHdhcmUAUGFpbnQuTkVUIHYzLjUuMTFH80I3AAAA5klEQVR4Xu3WMQ7CMAwF0IxcgCtw/xsGdWApItWHKorLQ8qESe2HbWjNiwABAgQIECBAgAABAgQIECBAgMAUgd4e/ehMSeTMh4wK2j/nqPjt/TNzm3IXgEFb64CdgBG44hKcsmg8pKDAvbf+7SlY7nvK3xb/+lx5BAA/jMCGpwOqC/z9CFT/ApfP/9Z6T87yBaUJJsVvsen9y8cDMAJ2gCWY7IHll1qaYFL84a9AelnF+CFwxYLSnAGMBFLNivE6QAcMBCq2dJqzETACRuCzQDpPFePTv9riCRAgQIAAAQIECBC4nsATagY67TVyuhAAAAAASUVORK5CYII=";
var pColor = null;
/* on mouse over the model image */
$("#model").mousemove(function(event) {
/* we correct the offset */
var offset = $(this).offset();
var relX = event.pageX - offset.left;
var relY = event.pageY - Math.round(offset.top);
/* and get the pixel values at this place (note we are not keeping the alpha channel; it's your decision whether or not it is valuable */
var pixelIndex = relY * layerImage.width + relX;
var dataIndex = pixelIndex * 4;
var color = [imageData[dataIndex], imageData[dataIndex + 1], imageData[dataIndex + 2]];
if (pColor == null) {
/* we trigger when first entering the image */
$(this).trigger("newColor", {
message: "Initial layer color",
data: color
});
} else if (pColor[0] != color[0] || pColor[1] != color[1] || pColor[2] != color[2]) {
/* we trigger if the new position is a new color in the layer image */
$(this).trigger("newColor", {
message: "Changed layer color",
data: color
});
}
pColor = color;
});
/* some small help to convert rgb to css colors */
function rgb2hex(red, green, blue) {
var rgb = blue | (green << 8) | (red << 16);
return '#' + (0x1000000 + rgb).toString(16).slice(1)
}
/* there you have the new layer color event management; for the example sake we change the color of some text */
$("#model").on("newColor", function(event, eventData) {
$("#selector").css("color", rgb2hex(eventData.data[0], eventData.data[1], eventData.data[2]));
});
});
img {
border: 1px solid silver
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<body>
<h4>Model image</h4>
<img id="model" src="data:image/png;base64, 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"
/>
<p>You are pointing at some <strong><span id="selector">color</span></strong>
</p>
<hr/>
<h4>Layer image (reference only, not displayed in page)</h4>
<img id="layer" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAOwgAADsIBFShKgAAAABp0RVh0U29mdHdhcmUAUGFpbnQuTkVUIHYzLjUuMTFH80I3AAAA5klEQVR4Xu3WMQ7CMAwF0IxcgCtw/xsGdWApItWHKorLQ8qESe2HbWjNiwABAgQIECBAgAABAgQIECBAgMAUgd4e/ehMSeTMh4wK2j/nqPjt/TNzm3IXgEFb64CdgBG44hKcsmg8pKDAvbf+7SlY7nvK3xb/+lx5BAA/jMCGpwOqC/z9CFT/ApfP/9Z6T87yBaUJJsVvsen9y8cDMAJ2gCWY7IHll1qaYFL84a9AelnF+CFwxYLSnAGMBFLNivE6QAcMBCq2dJqzETACRuCzQDpPFePTv9riCRAgQIAAAQIECBC4nsATagY67TVyuhAAAAAASUVORK5CYII="
/>
</body>
If you can have both images (the one with the blob and the one without), I think you can do this using HTML5 canvas.
draw the image normally
draw the blob image beneath the master image so it is invisible
copy the blob to a Canvas
onMouseOver, retrieve pixel data (R,G,B and alpha) for the Canvas at the appropriate coordinates
profit
Twist: you might be able to do this with only one image and its alpha channel, if you don't need it for anything else - give the pixels a full opacity (A=255) everywhere except in blobs 1, 2 and 3, which will have opacity equal to 255-(1,2,3...). You can't have too many different blobs or the transparency will become noticeable. Haven't tried, but it should work. Given the likely compressibility of a "blob-only" image, a pair of images (one without transparency, one also without transparency and with only N+1 colours, PNG compressed) should yield better results.
More-or-less-pseudo code with two images, using jQuery (can be done without):
var image = document.getElementById('mainImage')
var blobs = document.getElementById('blobImage');
// Create a canvas
canvas = $('<canvas/>')[0];
canvas.width = image.width;
canvas.height = image.height;
// IMPORTANT: for this to work, this script and blobImage.src must be both
// in the same security domain, or you'll get "this operation is insecure"
canvas.getContext('2d').drawImage(blobs, 0, 0, image.width, image.height);
// Now wait for it.
$('#mainImage').mouseover(function(event) {
// TO DO: offset clientX, clientY by margin on mainImage
var ctx = canvas.getContext('2d');
// Get one pixel
var pix = ctx.getImageData(event.clientX, event.clientY, 1, 1);
// Retrieve the red component
var red = pix.data[0];
if (red > 128) {
// ... do something for red
}
});
You could use SVG graphics to layer over the image.
My example uses an ellipse but you could use a polygons just as easily.
You could use the colour like you stated in your question or add an extra property to the svg element. The example uses onclick but mouseover works as well.
example js:
function svg_clicked(objSVG)
{
alert(objSVG.style.fill);
alert(objSVG.getAttribute('data-category'));
}
example svg:
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<ellipse cx="110" cy="80" rx="100" ry="50" style="fill:red;" onclick="svg_clicked(this);" data-category="lipstick" />
</svg>
Here's a fiddle (move the mouse over the O's in the picture)
It still works if you make the svg element transparent (using fill:transparent).
You can change the overlay to a colour or outline quickly for testing.
I highly recommend the time tested method.
The easiest way to both create blobs and to detect if the mouse is over them is to use svg graphics on top of the other image. SVG supports mouseover events and allows vector shapes which are going to give you far greater precision than using <map> or <area>.
I found this question that might also shed some light on where I am coming from: Hover only on non-transparent part of image. Read the second answer down because it will likely be prefered in your situation.
The svg elements on your image would be transparent (or whatever you would want), and you could easily detect the mouse over events.
The library from that question is called raphael. Hopefully this proves to be useful.
can you help me to place a Highchart inside a SVG element instead of an HTML . Cascaded elements work fine. I have already done it with the jquery SVG plot. But Highchart throws an error 13. What can i do?
Kind regards
Markus Breitinger
You can generate chart in div, which will have negative margin. Then use getSVG() function and paste it ot svg element.
http://api.highcharts.com/highcharts#Chart.getSVG()
Unfortunately it is not suppored, highcharts renders the chart in additional divs and adds elements like labels/datalabels as html objects.
But you can copy the SVG of highstock in you SVG. But you will lose all attached events.
Like drag and drop, click ....
Here an Example of it.
http://jsfiddle.net/L6SA4/10/
$.getJSON('http://www.highcharts.com/samples/data/jsonp.php?filename=aapl-c.json&callback=?', function(data) {
// Create a hidden and not attached div container.
var div = $('<div>This is an hidden unatached container.</div>');
// Create the chart
div.highcharts('StockChart', {
chart: {
width: 480,
height: 400,
events: {
load: function () {
// If hidden div was generated, take the svg content and put it into svg.
var stockSvg = $('svg', this.container);
var svgObj = $('#mySvg').svg();
// Force position of highstock
stockSvg.attr('x', 20);
stockSvg.attr('y', 30);
// Replace ugly rect with highstock
$('#container', svgObj).replaceWith(stockSvg);
}
}
},
series : [{
name : 'AAPL',
data : data,
tooltip: {
valueDecimals: 2
}
}]
});
});