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h2ochip.com

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Posts posted by h2ochip.com

  1. I have spent many hours (over many days) trying to find out how to align a <script></script> within HTML5 specifically one that creates a canvas using .

    There is a page referring to centering images... https://www.w3schools.com/howto/howto_css_image_center.asp

    useless!

    There is a page referring to CSS Layout.... https://www.w3schools.com/css/css_align.asp

    useless!

    And heres another one on Canvas reference.... https://www.w3schools.com/tags/ref_canvas.asp

    useless!

    https://www.w3schools.com/tags/tag_canvas.asp

    useless!

    https://www.w3schools.com/tags/tag_script.asp

    useless!

    https://www.w3schools.com/html/html5_canvas.asp

    also useless!

    This is so basic a feature you would think that there would be examples of this in some of your examples. but no!
     

    Here is the code I have been trying to center.....as you can see I have tried quite a few different methods.

    <!DOCTYPE html>
    <html>
    <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <style>
    canvas {
        border:1px solid #d3d3d3;
        background-color: #f1f1f1;
        margin: auto;
        text-align: center;
        object-position:center
    }
    .center {
      display: block;
      margin-left: auto;
      margin-right: auto;
      width: 50%;
    }
    </style>
    </head>
    <body onload="startGame()">
    <div class="center">
      <script>
      var myGamePiece;

      function startGame() {
          myGamePiece = new component(30, 30, "red", 10, 120);
          myGameArea.start();
      }

      var myGameArea = {
          canvas : document.createElement("canvas"),
          start : function() {
              this.canvas.width = 800;
              this.canvas.height = 600;
              this.canvas.x = 100;
              this.canvas.y = 50;
              this.canvas.style.cursor = "none"; //hide the original cursor
              this.context = this.canvas.getContext("2d");
              document.body.insertBefore(this.canvas, document.body.childNodes[0]);
              this.interval = setInterval(updateGameArea, 20);
              window.addEventListener('mousemove', function (e) {
                  myGameArea.x = e.pageX;
                  myGameArea.y = e.pageY;
              })
          },
          clear : function(){
              this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
          }
      }
      function component(width, height, color, x, y) {
          this.width = width;
          this.height = height;
          this.speedX = 0;
          this.speedY = 0;
          this.x = x;
          this.y = y;
          this.update = function() {
              ctx = myGameArea.context;
              ctx.fillStyle = color;
              ctx.fillRect(this.x, this.y, this.width, this.height);
          }
      }

      function updateGameArea() {
          myGameArea.clear();
          if (myGameArea.x && myGameArea.y) {
              myGamePiece.x = myGameArea.x;
              myGamePiece.y = myGameArea.y;
          }
          myGamePiece.update();
      }
      </script>
    </div>
    <p>Move the cursor inside the canvas to move the red square.</p>
    </body>
    </html>


    Please can you place more references to alignment as this issue has become somewhat annoying considering how easy this is in p5 javascript for instance.

    In p5 its  -

    var canvas = createCanvas(1000, 350); 

    canvas.position(x,y);

    So please make some kind of reference to centering js and <script> in some of the other pages using the term center, like <center> (yes I know its deprecated - but what are the alternatives?) as the search for this info is rather long.
    Thankyou in advance.

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