Drag and drop a moving ball around canvas












1















I have a red ball which moves in a specific path and 2 buttons to start and stop it's movement. I want to stop sometime the ball an then move it in another position of the path and then start it's movement again. Here is what i have done until now, but i did not managed to make it. My code runs and no errors appear but i can't drag or drop my ball to the position i want. Does anyone knows what i am doing wrong or why this happens??
Thanks in advance!!!



<!DOCTYPE html>

<html> 

 <head>

    <title> example </title> 



</head>

<body>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

    <button type='button' id='start'>START</button>

    <button type='button'  id='stop'>STOP</button>

    <br>

    <canvas id="myCanvas" width="1515" height="950" style="border:1px solid #d3d3d3;">

Your browser does not support the HTML5 canvas tag.</canvas>



</body>

</html>


script



<script>

    var canvas = document.getElementById("myCanvas");

    var ctx = canvas.getContext("2d");



    window.requestAnimFrame = (function (callback) {

        return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {

        window.setTimeout(callback, 1000 / 60);

        };

    })();



    var dragok = false;



    function MouseDown(e){

        x = e.pageX - canvas.offsetLeft;

        y = e.pageY - canvas.offsetTop;

        dragok = true;

        canvas.onmousemove = MouseMove;

    }



    function MouseUp(e){

        dragok = false;

        canvas.onmousemove = null;

    }



    function MouseMove(e){

        if (dragok){

            x = e.pageX - canvas.offsetLeft;

            y = e.pageY - canvas.offsetTop;

        }

    }



    canvas.onmousedown = MouseDown;

    canvas.onmouseup = MouseUp;



    var pathArray = ;

    pathArray.push({

      x: 140,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 230

    });

    pathArray.push({

      x: 140,

      y: 230

    });

    pathArray.push({

    x: 140,

    y: 320

    });

    pathArray.push({

      x: 1375,

      y: 320

    });

    pathArray.push({

      x: 1375,

      y: 450

    });

    pathArray.push({

      x: 140,

      y: 450

   });

   pathArray.push({

      x: 140,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 670

   });

   pathArray.push({

      x: 140,

      y: 670

   });



    var polypoints = makePolyPoints(pathArray, 5);  

    var width = 15;

    var height = 30;

    var speed = 1/2;

    var stopAnimation = true;

    var position = 0; 





    function drawBall(){

        ctx.beginPath();

        ctx.arc(150, 85, 12, 0, 2*Math.PI);

        ctx.fillStyle = "#B22222";

        ctx.fill();

    }



    drawBall();



    // start animation 

    $('#start').on('click',function(){

        stopAnimation = false;

        requestAnimFrame(animate);

    });



    // stop animation 

    $('#stop').on('click',function(){

        stopAnimation = true;

    });



    animate();



    function animate(){

        if(stopAnimation){return;}

        setTimeout(function () {

            requestAnimFrame(animate);

            position += speed;

            if (position> polypoints.length - 1) {

                return;

            }

            var pt = polypoints[position];

            if(pt){

                ctx.save();

                ctx.beginPath();

                ctx.translate(pt.x, pt.y);

                ctx.arc(-width / 2, -height / 2, 12, 0, 2*Math.PI);

                ctx.fillStyle = "#B22222";

                ctx.fill();

                ctx.restore();

            }

        }, 1000 / 60);

    }



    function makePolyPoints(pathArray, speedFactor) {

        var points = ;

        for (var i = 1; i < pathArray.length; i++) {

            var startPt = pathArray[i - 1];

            var endPt = pathArray[i];

            var dx = endPt.x - startPt.x;

            var dy = endPt.y - startPt.y;

            var distance = Math.sqrt(dx*dx+dy*dy)

            var steps = distance/speedFactor

            for (var n = 0; n <= steps; n++) {

                var x = startPt.x + dx * n / steps;

                var y = startPt.y + dy * n / steps;

                points.push({

                x: x,

                y: y

                });

            }

        }

        return (points);

    }





</script>





javascript html5 canvas javascript-events html5-canvas







share|improve this question

























  • One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

    – enxaneta
    Nov 13 '18 at 20:11











  • That was a copy-paste mistake, but thank you for your note!

    – dim109
    Nov 13 '18 at 20:36
















1















I have a red ball which moves in a specific path and 2 buttons to start and stop it's movement. I want to stop sometime the ball an then move it in another position of the path and then start it's movement again. Here is what i have done until now, but i did not managed to make it. My code runs and no errors appear but i can't drag or drop my ball to the position i want. Does anyone knows what i am doing wrong or why this happens??
Thanks in advance!!!



<!DOCTYPE html>

<html> 

 <head>

    <title> example </title> 



</head>

<body>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

    <button type='button' id='start'>START</button>

    <button type='button'  id='stop'>STOP</button>

    <br>

    <canvas id="myCanvas" width="1515" height="950" style="border:1px solid #d3d3d3;">

Your browser does not support the HTML5 canvas tag.</canvas>



</body>

</html>


script



<script>

    var canvas = document.getElementById("myCanvas");

    var ctx = canvas.getContext("2d");



    window.requestAnimFrame = (function (callback) {

        return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {

        window.setTimeout(callback, 1000 / 60);

        };

    })();



    var dragok = false;



    function MouseDown(e){

        x = e.pageX - canvas.offsetLeft;

        y = e.pageY - canvas.offsetTop;

        dragok = true;

        canvas.onmousemove = MouseMove;

    }



    function MouseUp(e){

        dragok = false;

        canvas.onmousemove = null;

    }



    function MouseMove(e){

        if (dragok){

            x = e.pageX - canvas.offsetLeft;

            y = e.pageY - canvas.offsetTop;

        }

    }



    canvas.onmousedown = MouseDown;

    canvas.onmouseup = MouseUp;



    var pathArray = ;

    pathArray.push({

      x: 140,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 230

    });

    pathArray.push({

      x: 140,

      y: 230

    });

    pathArray.push({

    x: 140,

    y: 320

    });

    pathArray.push({

      x: 1375,

      y: 320

    });

    pathArray.push({

      x: 1375,

      y: 450

    });

    pathArray.push({

      x: 140,

      y: 450

   });

   pathArray.push({

      x: 140,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 670

   });

   pathArray.push({

      x: 140,

      y: 670

   });



    var polypoints = makePolyPoints(pathArray, 5);  

    var width = 15;

    var height = 30;

    var speed = 1/2;

    var stopAnimation = true;

    var position = 0; 





    function drawBall(){

        ctx.beginPath();

        ctx.arc(150, 85, 12, 0, 2*Math.PI);

        ctx.fillStyle = "#B22222";

        ctx.fill();

    }



    drawBall();



    // start animation 

    $('#start').on('click',function(){

        stopAnimation = false;

        requestAnimFrame(animate);

    });



    // stop animation 

    $('#stop').on('click',function(){

        stopAnimation = true;

    });



    animate();



    function animate(){

        if(stopAnimation){return;}

        setTimeout(function () {

            requestAnimFrame(animate);

            position += speed;

            if (position> polypoints.length - 1) {

                return;

            }

            var pt = polypoints[position];

            if(pt){

                ctx.save();

                ctx.beginPath();

                ctx.translate(pt.x, pt.y);

                ctx.arc(-width / 2, -height / 2, 12, 0, 2*Math.PI);

                ctx.fillStyle = "#B22222";

                ctx.fill();

                ctx.restore();

            }

        }, 1000 / 60);

    }



    function makePolyPoints(pathArray, speedFactor) {

        var points = ;

        for (var i = 1; i < pathArray.length; i++) {

            var startPt = pathArray[i - 1];

            var endPt = pathArray[i];

            var dx = endPt.x - startPt.x;

            var dy = endPt.y - startPt.y;

            var distance = Math.sqrt(dx*dx+dy*dy)

            var steps = distance/speedFactor

            for (var n = 0; n <= steps; n++) {

                var x = startPt.x + dx * n / steps;

                var y = startPt.y + dy * n / steps;

                points.push({

                x: x,

                y: y

                });

            }

        }

        return (points);

    }





</script>





javascript html5 canvas javascript-events html5-canvas







share|improve this question

























  • One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

    – enxaneta
    Nov 13 '18 at 20:11











  • That was a copy-paste mistake, but thank you for your note!

    – dim109
    Nov 13 '18 at 20:36














1












1








1








I have a red ball which moves in a specific path and 2 buttons to start and stop it's movement. I want to stop sometime the ball an then move it in another position of the path and then start it's movement again. Here is what i have done until now, but i did not managed to make it. My code runs and no errors appear but i can't drag or drop my ball to the position i want. Does anyone knows what i am doing wrong or why this happens??
Thanks in advance!!!



<!DOCTYPE html>

<html> 

 <head>

    <title> example </title> 



</head>

<body>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

    <button type='button' id='start'>START</button>

    <button type='button'  id='stop'>STOP</button>

    <br>

    <canvas id="myCanvas" width="1515" height="950" style="border:1px solid #d3d3d3;">

Your browser does not support the HTML5 canvas tag.</canvas>



</body>

</html>


script



<script>

    var canvas = document.getElementById("myCanvas");

    var ctx = canvas.getContext("2d");



    window.requestAnimFrame = (function (callback) {

        return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {

        window.setTimeout(callback, 1000 / 60);

        };

    })();



    var dragok = false;



    function MouseDown(e){

        x = e.pageX - canvas.offsetLeft;

        y = e.pageY - canvas.offsetTop;

        dragok = true;

        canvas.onmousemove = MouseMove;

    }



    function MouseUp(e){

        dragok = false;

        canvas.onmousemove = null;

    }



    function MouseMove(e){

        if (dragok){

            x = e.pageX - canvas.offsetLeft;

            y = e.pageY - canvas.offsetTop;

        }

    }



    canvas.onmousedown = MouseDown;

    canvas.onmouseup = MouseUp;



    var pathArray = ;

    pathArray.push({

      x: 140,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 230

    });

    pathArray.push({

      x: 140,

      y: 230

    });

    pathArray.push({

    x: 140,

    y: 320

    });

    pathArray.push({

      x: 1375,

      y: 320

    });

    pathArray.push({

      x: 1375,

      y: 450

    });

    pathArray.push({

      x: 140,

      y: 450

   });

   pathArray.push({

      x: 140,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 670

   });

   pathArray.push({

      x: 140,

      y: 670

   });



    var polypoints = makePolyPoints(pathArray, 5);  

    var width = 15;

    var height = 30;

    var speed = 1/2;

    var stopAnimation = true;

    var position = 0; 





    function drawBall(){

        ctx.beginPath();

        ctx.arc(150, 85, 12, 0, 2*Math.PI);

        ctx.fillStyle = "#B22222";

        ctx.fill();

    }



    drawBall();



    // start animation 

    $('#start').on('click',function(){

        stopAnimation = false;

        requestAnimFrame(animate);

    });



    // stop animation 

    $('#stop').on('click',function(){

        stopAnimation = true;

    });



    animate();



    function animate(){

        if(stopAnimation){return;}

        setTimeout(function () {

            requestAnimFrame(animate);

            position += speed;

            if (position> polypoints.length - 1) {

                return;

            }

            var pt = polypoints[position];

            if(pt){

                ctx.save();

                ctx.beginPath();

                ctx.translate(pt.x, pt.y);

                ctx.arc(-width / 2, -height / 2, 12, 0, 2*Math.PI);

                ctx.fillStyle = "#B22222";

                ctx.fill();

                ctx.restore();

            }

        }, 1000 / 60);

    }



    function makePolyPoints(pathArray, speedFactor) {

        var points = ;

        for (var i = 1; i < pathArray.length; i++) {

            var startPt = pathArray[i - 1];

            var endPt = pathArray[i];

            var dx = endPt.x - startPt.x;

            var dy = endPt.y - startPt.y;

            var distance = Math.sqrt(dx*dx+dy*dy)

            var steps = distance/speedFactor

            for (var n = 0; n <= steps; n++) {

                var x = startPt.x + dx * n / steps;

                var y = startPt.y + dy * n / steps;

                points.push({

                x: x,

                y: y

                });

            }

        }

        return (points);

    }





</script>





javascript html5 canvas javascript-events html5-canvas







share|improve this question
















I have a red ball which moves in a specific path and 2 buttons to start and stop it's movement. I want to stop sometime the ball an then move it in another position of the path and then start it's movement again. Here is what i have done until now, but i did not managed to make it. My code runs and no errors appear but i can't drag or drop my ball to the position i want. Does anyone knows what i am doing wrong or why this happens??
Thanks in advance!!!



<!DOCTYPE html>

<html> 

 <head>

    <title> example </title> 



</head>

<body>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

    <button type='button' id='start'>START</button>

    <button type='button'  id='stop'>STOP</button>

    <br>

    <canvas id="myCanvas" width="1515" height="950" style="border:1px solid #d3d3d3;">

Your browser does not support the HTML5 canvas tag.</canvas>



</body>

</html>


script



<script>

    var canvas = document.getElementById("myCanvas");

    var ctx = canvas.getContext("2d");



    window.requestAnimFrame = (function (callback) {

        return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {

        window.setTimeout(callback, 1000 / 60);

        };

    })();



    var dragok = false;



    function MouseDown(e){

        x = e.pageX - canvas.offsetLeft;

        y = e.pageY - canvas.offsetTop;

        dragok = true;

        canvas.onmousemove = MouseMove;

    }



    function MouseUp(e){

        dragok = false;

        canvas.onmousemove = null;

    }



    function MouseMove(e){

        if (dragok){

            x = e.pageX - canvas.offsetLeft;

            y = e.pageY - canvas.offsetTop;

        }

    }



    canvas.onmousedown = MouseDown;

    canvas.onmouseup = MouseUp;



    var pathArray = ;

    pathArray.push({

      x: 140,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 100

    });

    pathArray.push({

      x: 1375,

      y: 230

    });

    pathArray.push({

      x: 140,

      y: 230

    });

    pathArray.push({

    x: 140,

    y: 320

    });

    pathArray.push({

      x: 1375,

      y: 320

    });

    pathArray.push({

      x: 1375,

      y: 450

    });

    pathArray.push({

      x: 140,

      y: 450

   });

   pathArray.push({

      x: 140,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 540

   });

   pathArray.push({

      x: 1375,

      y: 670

   });

   pathArray.push({

      x: 140,

      y: 670

   });



    var polypoints = makePolyPoints(pathArray, 5);  

    var width = 15;

    var height = 30;

    var speed = 1/2;

    var stopAnimation = true;

    var position = 0; 





    function drawBall(){

        ctx.beginPath();

        ctx.arc(150, 85, 12, 0, 2*Math.PI);

        ctx.fillStyle = "#B22222";

        ctx.fill();

    }



    drawBall();



    // start animation 

    $('#start').on('click',function(){

        stopAnimation = false;

        requestAnimFrame(animate);

    });



    // stop animation 

    $('#stop').on('click',function(){

        stopAnimation = true;

    });



    animate();



    function animate(){

        if(stopAnimation){return;}

        setTimeout(function () {

            requestAnimFrame(animate);

            position += speed;

            if (position> polypoints.length - 1) {

                return;

            }

            var pt = polypoints[position];

            if(pt){

                ctx.save();

                ctx.beginPath();

                ctx.translate(pt.x, pt.y);

                ctx.arc(-width / 2, -height / 2, 12, 0, 2*Math.PI);

                ctx.fillStyle = "#B22222";

                ctx.fill();

                ctx.restore();

            }

        }, 1000 / 60);

    }



    function makePolyPoints(pathArray, speedFactor) {

        var points = ;

        for (var i = 1; i < pathArray.length; i++) {

            var startPt = pathArray[i - 1];

            var endPt = pathArray[i];

            var dx = endPt.x - startPt.x;

            var dy = endPt.y - startPt.y;

            var distance = Math.sqrt(dx*dx+dy*dy)

            var steps = distance/speedFactor

            for (var n = 0; n <= steps; n++) {

                var x = startPt.x + dx * n / steps;

                var y = startPt.y + dy * n / steps;

                points.push({

                x: x,

                y: y

                });

            }

        }

        return (points);

    }





</script>





javascript html5 canvas javascript-events html5-canvas




javascript html5 canvas javascript-events html5-canvas






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 13 '18 at 20:43







dim109

















asked Nov 13 '18 at 19:32









dim109dim109

84




84













  • One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

    – enxaneta
    Nov 13 '18 at 20:11











  • That was a copy-paste mistake, but thank you for your note!

    – dim109
    Nov 13 '18 at 20:36



















  • One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

    – enxaneta
    Nov 13 '18 at 20:11











  • That was a copy-paste mistake, but thank you for your note!

    – dim109
    Nov 13 '18 at 20:36

















One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

– enxaneta
Nov 13 '18 at 20:11





One of the things you are doing wrong is that you try to push your balls in an unexistent array pathArrayBall1

– enxaneta
Nov 13 '18 at 20:11













That was a copy-paste mistake, but thank you for your note!

– dim109
Nov 13 '18 at 20:36





That was a copy-paste mistake, but thank you for your note!

– dim109
Nov 13 '18 at 20:36












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Danny Elfman

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Danny Elfman From Wikipedia, the free encyclopedia Jump to navigation Jump to search Danny Elfman Elfman at the 2010 San Diego Comic-Con Born Daniel Robert Elfman ( 1953-05-29 ) May 29, 1953 (age 65) Los Angeles, California, U.S. Spouse(s) Bridget Fonda ( m.  2003) Children 1 Musical career Genres Rock [1] ska [2] new wave film music video game music Occupation(s) Composer, singer, songwriter, record producer Instruments Trombone guitar percussion vocals keyboards [3] Years active 1972–present Associated acts Oingo Boingo James Newton Howard Daniel Robert Elfman (born May 29, 1953) is an American composer, singer, songwriter, and record producer. Elfman first became known for being the lead singer and songwriter for the band Oingo Boingo from 1974 to 1995. He is well known for scoring films and television shows, particularly his frequent collabora
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Retrieve a Users Dashboard in Tumblr with R and TumblR. Oauth Issues

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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 I am trying to use the TumblR package in R to set up the Oauth Authentication to Retrieve a user's dashboard using the second example in tumblR documentation However I get the following error, it seems that using twitter others have been able to use a different function to get around this, but I am not finding the same function available for Tumblr. See twitter package for R authentication: error 401 My code consumer_key <- OKey consumer_secret <- SKey appname <- App_name tokenURL <- 'http://www.tumblr.com/oauth/request_token' accessTokenURL <- 'http://www.tumblr.com/oauth/acces_token'
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