Difference between revisions of "Flags with Polygons"
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==Seychelles== | ==Seychelles== | ||
<div class=qu data-height="150" data-width="300"> | <div class=qu data-height="150" data-width="300"> | ||
[[Image:flagseychelles.png]] | [[Image:flagseychelles.png|left|frame|Flag of Seychelles]] | ||
<pre class=usr> | <pre class=usr> |
Revision as of 17:49, 16 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}`);
Napier
function drawFlag(ctx) { ctx.fillStyle = 'white'; ctx.fillRect(0,0,150,150); ctx.fillStyle = 'red'; ctx.moveTo(0,0); ctx.lineTo(150,0); ctx.lineTo(150,150); ctx.fill(); }
function drawFlag(ctx) { ctx.fillStyle = 'white'; ctx.fillRect(0,0,150,150); ctx.moveTo(0,0); ctx.lineTo(150,150); ctx.lineTo(0,150); ctx.fillStyle = "red"; ctx.fill(); }
The Czech Republic
- 300 by 200
- The point of intersection is the centre of the rectangle
function drawFlag(ctx) { }
function drawFlag(ctx) { ctx.fillStyle = 'blue'; ctx.moveTo(0,0); ctx.lineTo(150,100); ctx.lineTo(0,200); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'white'; ctx.moveTo(0,0); ctx.lineTo(150,100); ctx.lineTo(300,100); ctx.lineTo(300,0); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'red'; ctx.moveTo(0,200); ctx.lineTo(150,100); ctx.lineTo(300,100); ctx.lineTo(300,200); ctx.fill(); }
The Bahamas
function drawFlag(ctx) { }
function drawFlag(ctx) { ctx.fillStyle = 'rgb(127,192,255)'; ctx.fillRect(0,0,300,150); ctx.fillStyle = 'rgb(255,255,0)'; ctx.fillRect(0,50,300,50); ctx.fillStyle = 'black'; ctx.moveTo(0,0); ctx.lineTo(112,75); ctx.lineTo(0,150); ctx.fill(); }
Jamaica
function drawFlag(ctx) { ctx.fillStyle = 'yellow'; ctx.fillRect(0,0,300,150); }
function drawFlag(ctx) { ctx.fillStyle = 'yellow'; ctx.fillRect(0,0,300,150); ctx.fillStyle = 'green'; ctx.moveTo(30,0); ctx.lineTo(150,60); ctx.lineTo(270,0); ctx.fill(); ctx.moveTo(30,150); ctx.lineTo(150,90); ctx.lineTo(270,150); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'black'; ctx.moveTo(0,15); ctx.lineTo(120,75); ctx.lineTo(0,135); ctx.fill(); ctx.moveTo(300,15); ctx.lineTo(180,75); ctx.lineTo(300,135); ctx.fill(); }
Seychelles
function drawFlag(ctx) { }
function drawFlag(ctx) { ctx.fillStyle = 'blue'; ctx.moveTo(0,150); ctx.lineTo(0,0); ctx.lineTo(100,0); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'yellow'; ctx.moveTo(0,150); ctx.lineTo(100,0); ctx.lineTo(200,0); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'red'; ctx.moveTo(0,150); ctx.lineTo(200,0); ctx.lineTo(300,0); ctx.lineTo(300,50); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'white'; ctx.moveTo(0,150); ctx.lineTo(300,50); ctx.lineTo(300,100); ctx.fill(); ctx.beginPath(); ctx.fillStyle = 'green'; ctx.moveTo(0,150); ctx.lineTo(300,150); ctx.lineTo(300,100); ctx.fill(); }