Difference between revisions of "Flags with Stars"

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Line 64: Line 64:


==Panama==
==Panama==
<div class=qu data-height="150" data-width="300" data-cols='40'>
<div class=qu data-width="240" data-height="160">
[[Image:flagpanama.png]]
[[Image:flagpanama.png]]
<pre class=usr>
<pre class=usr>
function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-25],[6,-8],[24,-8],[9,3],[15,20],
    [ 0,9],[-15,20],[-9,3],[-24,-8],[-6,-8]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}
function drawFlag(ctx)
function drawFlag(ctx)
{
{
Line 72: Line 80:
</pre>
</pre>
<pre class=ans>
<pre class=ans>
function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-25],[6,-8],[24,-8],[9,3],[15,20],
    [ 0,9],[-15,20],[-9,3],[-24,-8],[-6,-8]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}
function drawFlag(ctx)
function drawFlag(ctx)
{
{
  ctx.fillStyle = 'white';
  ctx.fillRect(0,0,240,160);
  ctx.fillStyle = 'red';
  ctx.fillRect(120,0,120,80);
  ctx.translate(180,120);
  star(ctx);
  ctx.translate(-180,-120);
  ctx.fillStyle = 'blue';
  ctx.fillRect(0,80,120,80);
  ctx.translate(60,40);
  star(ctx);
}
}
</pre>
</pre>

Revision as of 13:41, 9 August 2021

<div style='background:silver;padding:5px'>
<canvas id='usr' width=--snippet-w-- height=--snippet-h--></canvas>
<canvas id='ans' width=--snippet-w-- height=--snippet-h-- style='display:none'></canvas>
</div>
--snippet-usr--
drawFlag(document.getElementById('usr').getContext('2d'));
(()=>{
  --snippet-ans--
  drawFlag(document.getElementById('ans').getContext('2d'));
})();
let [a,b] = ['usr','ans']
    .map(id=>document.getElementById(id))
    .map(elem=>elem.getContext('2d').getImageData(0,0,elem.width,elem.height))
let diff = a.data.map((v,i) => v===b.data[i]?1:0).reduce((acc,v)=>acc+v,0)*100/a.data.length;
let fb = document.createElement('div');
fb.innerText = `Score: ${diff.toFixed(1)}`;
document.body.appendChild(fb);
fetch(`/reportProgress.php?uid=--snippet-uid--&qid=--snippet-qid--&score=${diff}`);

Vietnam

Flagvietnam.png

function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-50],[11,-16],[48,-16],[18,6],[30,41],
    [ 0,18],[-30,41],[-18,6],[-48,-16],[-11,-16]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}

function drawFlag(ctx)
{
  ctx.fillStyle = 'red';
  ctx.translate(50,50);
  star(ctx);
}
function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-50],[11,-16],[48,-16],[18,6],[30,41],
    [ 0,18],[-30,41],[-18,6],[-48,-16],[-11,-16]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}

function drawFlag(ctx)
{
  ctx.fillStyle = 'red';
  ctx.fillRect(0,0,200,150);
  ctx.translate(100,75);
  ctx.fillStyle='yellow';
  star(ctx);
}

Panama

Flagpanama.png

function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-25],[6,-8],[24,-8],[9,3],[15,20],
    [ 0,9],[-15,20],[-9,3],[-24,-8],[-6,-8]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}
function drawFlag(ctx)
{
}
function star(ctx)
{
  ctx.beginPath();
  [ [ 0,-25],[6,-8],[24,-8],[9,3],[15,20],
    [ 0,9],[-15,20],[-9,3],[-24,-8],[-6,-8]
  ].forEach((xy) => ctx.lineTo(xy[0],xy[1]));
  ctx.fill();
}

function drawFlag(ctx)
{
  ctx.fillStyle = 'white';
  ctx.fillRect(0,0,240,160);
  ctx.fillStyle = 'red';
  ctx.fillRect(120,0,120,80);
  ctx.translate(180,120);
  star(ctx);
  ctx.translate(-180,-120);
  ctx.fillStyle = 'blue';
  ctx.fillRect(0,80,120,80);
  ctx.translate(60,40);
  star(ctx);
}

Bosnia and Herzegovina

Flagbhz.png

function drawFlag(ctx)
{
}
function drawFlag(ctx)
{
}

Democratic Republic of Congo (formerly Zaire)

Flagcongo.png

function drawFlag(ctx)
{
}
function drawFlag(ctx)
{
}