I cannot get Paper.js to draw a rectangle. I've followed the tutorial but nothing seems to be working. Can you tell me what's wrong with my code below?
<!DOCTYPE html>
<html>
<head>
<!--load paper.js-->
<script type="text/javascript" src="http://localhost/node_modules/paper/dist/paper-core.js"></script>
<!--drawing script-->
<script type="text/javascript" canvas="canvas">
window.onload = function() {
var canvas = document.getElementById("canvas");
paper.setup(canvas);
var meterStart = new paper.Point(5,5);
var meterSize = new paper.Size(40, 720);
var meter = new paper.Rectangle(meterStart, meterSize);
meter.strokeColor = 'black';
paper.view.draw();
}
</script>
</head>
<body>
<canvas id="canvas" height="750px" width="600px"></canvas>
</body>
</html>
The code you are using doesn't actually draw out the rectangle correctly. Instead, it just defines the rectangle object.
Here's the correct way to draw a rectangle: https://jsbin.com/niwegobanu/edit?html,js,output
<!DOCTYPE html>
<html>
<head>
<!--load paper.js-->
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/paper.js/0.10.2/paper-full.js"></script>
</head>
<script type="text/paperscript" canvas="myCanvas">
var rectangle = new Rectangle(new Point(50, 50), new Point(150, 100));
var path = new Path.Rectangle(rectangle);
path.fillColor = '#e9e9ff';
path.selected = true;
</script>
</head>
<body>
<canvas id="myCanvas" resize></canvas>
</body>
</html>
Related
I have created an image drawing canvas but the drawing color can't change. maybe it's javascript set color but can't find. if anyone knows please help me. this is the demo link
http://affibe.com/erevo/
HTML Code:
`
<html class="gr__adsterra_com">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script type="text/javascript" src="js/jquery-2.2.4.min.js"></script>
<script type="text/javascript" src="js/pixi.min.js"></script>
<script type="text/javascript" src="js/animationFrame.js"></script>
<script type="text/javascript" src="js/nodes.js"></script>
<style>body{margin: 0; background-color: transparent;}</style>
</head>
<body data-gr-c-s-loaded="true">
<header>
<script>lowPerformance=function (){var ua=navigator.userAgent.toLowerCase(); if (ua.indexOf("iphone") !=-1 || ua.indexOf("mobile") !=-1) return true; if ($(window).width()==0) return; return ($(window).width() <=480) ? true : false;}; var ie=false; var w=window, d=document, documentElement=d.documentElement, body=d.getElementsByTagName('body')[0], height=w.innerHeight|| documentElement.clientHeight|| body.clientHeight; if (navigator.appName=='Microsoft Internet Explorer') ie=true; Nodes.multipleInit([{"post_name": "AFFIBE", "drawnImage": (height>860)?"http:\/\/affibe.com\/erevo\/images\/main\/logo_header_er.png":"http:\/\/affibe.com\/erevo\/images\/main\/logo_header_er.png", "linkTitle": "AFFIBE", "particleDensity": ie?"11":"7", "particleWidth": "0.5", "particleHeight": "0.5"}]); </script>
</header>
</body>
</html>
pixi.min.js:
http://affibe.com/erevo/js/pixi.min.js
animationFrame.js
!function(){for(var n=0,i=["ms","moz","webkit","o"],e=0;e<i.length&&!window.requestAnimationFrame;++e)window.requestAnimationFrame=window[i[e]+"RequestAnimationFrame"],window.cancelAnimationFrame=window[i[e]+"CancelAnimationFrame"]||window[i[e]+"CancelRequestAnimationFrame"];window.requestAnimationFrame||(window.requestAnimationFrame=function(i){var e=(new Date).getTime(),a=Math.max(0,16-(e-n)),o=window.setTimeout(function(){i(e+a)},a);return n=e+a,o}),window.cancelAnimationFrame||(window.cancelAnimationFrame=function(n){clearTimeout(n)})}();
if i understand it the follow code help to you
var c = document.getElementById("canvas");
var ctx= c.getContext("2d");
ctx.fillStyle="#66bfff";
for example
var c = document.getElementById('canvas');
var ctx = c.getContext("2d");
ctx.fillStyle = "#f00";
ctx.fillRect(40, 40, 40, 40);
#canvas{
border: 2px solid #333;
}
<html>
<body>
<canvas id="canvas" width="100" height="100"></canvas>
</body>
</html>
i am making a basic game loop so i started with the basic cube exercise and i wrote the exemple below but it isn't working. i tried to see if there is something misspell but i could find nothing aparently.
<!DOCTYPE HTML>
<html>
<head>
<title>Game</title>
<style type="text/css">
#GameCanvas {
background-color: #FF0000;
}
</style>
</head>
<body>
<canvas id="GameCanvas" width="1000" height="600"></canvas>
<script type="text/javascript">
var canvas = document.findElementById("GameCanvas");
var graphics = canvas.getContext("2d");
function Update() {}
function Draw() {
graphics.beginPath();
graphics.fillRect(20, 20, 50, 50);
graphics.fillStyle = "#FFFFFF";
graphics.fill();
graphics.closePath();
}
function GameLoop() {
Update();
Draw();
requestAnimFrame(GameLoop);
}
requestAnimFrame(GameLoop);
</script>
</body>
</html>
You have a couple bugs here, document.findElementById does not exist, change it to document.getElementById.
requestAnimFrame should be changed to requestAnimationFrame in both instances.
With these changes your loop runs and draws a square to the screen.
<!DOCTYPE HTML>
<html>
<head>
<title>Game</title>
<style type="text/css">
#GameCanvas {
background-color: #FF0000;
}
</style>
</head>
<body>
<canvas id="GameCanvas" width="1000" height="600"></canvas>
<script type="text/javascript">
var canvas = document.getElementById("GameCanvas");
var graphics = canvas.getContext("2d");
function Update() {}
function Draw() {
graphics.beginPath();
graphics.fillRect(20, 20, 50, 50);
graphics.fillStyle = "#FFFFFF";
graphics.fill();
graphics.closePath();
}
function GameLoop() {
Update();
Draw();
requestAnimationFrame(GameLoop);
}
requestAnimationFrame(GameLoop);
</script>
</body>
</html>
I created my first js app with canvas and it doesn't work. Code was coppied from http://fabricjs.com/ and just wrapped in jQuery.
fab.js
var $ = jQuery;
$(document).ready(function(){
var canvas = new fabric.Canvas('c');
var rect = new fabric.Rect({
left: 100,
top: 100,
fill: 'red',
width: 20,
height: 20,
angle: 45
});
canvas.add(rect);
});
html
<html>
<head>
<title>Fabric.js</title>
<script src="jquery-1.11.3.min.js"></script>
<script src="jquery-ui.min.js"></script>
<script src="canvasjs.min.js"></script>
<script src="fabric.min.js"></script>
<script src="fab.js"></script>
</head>
<body>
<div id="c">
</div>
</body>
</html>
Uncaught Error: Could not initialize canvas element
What is going wrong?
I came to the resolution:
just replace div attribute with canvas!
<html>
<head>
<title>Fabric.js</title>
<script src="jquery-1.11.3.min.js"></script>
<script src="jquery-ui.min.js"></script>
<script src="canvasjs.min.js"></script>
<script src="fabric.min.js"></script>
<script src="fab.js"></script>
</head>
<body>
<canvas id="c">
</canvas>
</body>
</html>
And it's working now.
i have a problem:
I'm working on map generator, using html canvas, the user inputs X,Y, width and height of an image.
But when i use drawImage with users input, the image doesn't fit the Canvas XY and the select height and width in pixels. Is there anything that I can use to solve this?
<html lang=''>
<head>
<title>Map tools</title>
</head>
<body>
<div align='center'>
<canvas id='map' class='mapcanvas' width="800" height="400">
</canvas>
<p>Send</p>
<textarea id="xmlinput" class="inputTextArea" placeholder="coords"></textarea>
</div>
</body>
<script>
function loadXml(){
co = document.getElementById("xmlinput").value.split(',') // X, Y, H, L
canvas = document.getElementById("map");
context = canvas.getContext("2d");
ground.src = 'http://i.imgur.com/Z3DyMAM.png'
ground.onload = function (){
context.drawImage(ground, co[0], co[1], co[2], co[3]);
}
}
</script>
</html>
Ground was undefined. I've put it in for you.
<html lang=''>
<head>
<title>Map tools</title>
</head>
<body>
<div align='center'>
<canvas id='map' class='mapcanvas' width="800" height="400">
</canvas>
<p>Send</p>
<textarea id="xmlinput" class="inputTextArea" placeholder="coords"></textarea>
<img id='ground' style='display: none' /> <!--You forgot the image!-->
</div>
</body>
<script>
function loadXml(){
var co = document.getElementById("xmlinput").value.split(','), // X, Y, H, L
canvas = document.getElementById("map"),
context = canvas.getContext("2d"),
ground = document.getElementById('ground'); //ground was undefined!
ground.src = 'http://i.imgur.com/Z3DyMAM.png'
ground.onload = function (){
context.drawImage(ground, co[0], co[1], co[2], co[3]);
}
}
</script>
</html>
Your code works perfectly.Just add this to the page(create an image object)
<!DOCTYPE html />
<html lang=''>
<head>
<title>Map tools</title>
</head>
<body>
<div align='center'>
<canvas id='map' class='mapcanvas' width="800" height="400">
</canvas>
<p>Send</p>
<textarea id="xmlinput" class="inputTextArea" placeholder="coords"></textarea>
</div>
</body>
<script>
function loadXml(){
co = document.getElementById("xmlinput").value.split(',') // X, Y, H, L
canvas = document.getElementById("map");
context = canvas.getContext("2d");
var ground=new Image();
ground.src = 'http://i.imgur.com/Z3DyMAM.png'
ground.onload = function (){
context.drawImage(ground, co[0], co[1], co[2], co[3]);
}
}
</script>
</html>
I've just started to learn easeljs. I have tried to create a rectangle which will follow the mouse coordinates, but it is not working. What's wrong here and how it can be fixed?
fiddle
<html>
<head>
<style>
*{margin:0px;padding:0px;}
</style>
<script src="easeljs.js"></script>
</head>
<body>
<canvas id="mycanvas" width="500" height="500" style="border:1px solid black;"></canvas>
<script>
function init(){
var canvas=document.getElementById('mycanvas');
var ctx=canvas.getContext('2d');
var stage=new createjs.Stage(canvas);
var shape=new createjs.Shape();
shape.graphics.beginFill('red').drawRect(300,200,40,40);
stage.addChild(shape);
createjs.Ticker.addEventListener("tick",tick);
function tick(event){
shape.x=stage.mouseX;
shape.y=stage.mouseY;
stage.update(event);
}
}
window.onload=init;
</script>
</body>
</html>
You have set the x and y of your rectangle to be 300 and 200 respectively, so if you set those to 0, then the rectangle will start in the right place and follow the mouse as expected.
shape.graphics.beginFill('red').drawRect(0,0,40,40);