标签:request str clear java ati amp val 做了 logs
最强大脑节目里有些项目设置得比较有意思,比较喜欢看。在贴吧看到有人用.NET写了个小程序模仿节目里的雷达探点项目,不会.NET,只会用HTML5也做了。
因为比较懒,代码写得比较简单,不过除了雷达线没画出来,基本上和节目里的效果差不多了。代码如下:
<!DOCTYPE html> <html lang=‘zh-cmn-Hans‘> <head> <meta charset=‘utf-8‘ /> <title>雷达探点 by 知鱼之乐</title> <style type="text/css"> body {background: #000; color: #f0f0f0;} canvas {background: #000; cursor: default;} div {margin: auto; width: 1100px;} select {margin-right: 20px;} button {margin: 10px 10px 10px 0; padding: 3px 5px; color: #000; cursor: pointer;} button[disabled=disabled] {color: #999; cursor: default;} </style> </head> <body> <div> <h1>雷达探点</h1> <canvas id=‘canvas‘ width=‘1050‘ height=‘520‘></canvas> </div> <div> 点数量:<select id=‘pointNum‘> <option value=‘1000‘>1000</option> <option value=‘2000‘>2000</option> <option value=‘3000‘>3000</option> </select> 可视角:<select id=‘angle‘> <option value=‘15‘>15</option> <option value=‘25‘>25</option> <option value=‘35‘>35</option> </select> 速度:<select id=‘speed‘> <option value=‘1‘>慢</option> <option value=‘2‘>中</option> <option value=‘3‘>快</option> </select> 彩色点:<input type=‘checkbox‘ id=‘pointColor‘> <!-- 雷达线:<input type=‘checkbox‘ id=‘line‘> --> <br /> <button id=‘btInit‘>生成点</button> <button id=‘btFind‘ disabled=‘disabled‘>开始找</button> <button id=‘btMarker‘ disabled=‘disabled‘>找到了</button> <p>(x,y)</p> </div> <script type="text/javascript"> var canvas, ctx; var lineData, pointData1, pointData2; var point = []; var pointSize = 3; var pointNum = 10; var hide = 0; var pointColor = 1, color = [‘white‘, ‘green‘, ‘blue‘, ‘red‘, ‘purple‘]; var speed = 1, angle = 35, ang = 0; var btInit, btFind, btMarker; var raf, find = false; var ts, te; window.onload = function(){ canvas = document.querySelector(‘#canvas‘); ctx = canvas.getContext(‘2d‘); btInit = document.querySelector(‘#btInit‘); btFind = document.querySelector(‘#btFind‘); btMarker = document.querySelector(‘#btMarker‘); btInit.addEventListener(‘click‘, function(){ btInit.setAttribute(‘disabled‘, ‘disabled‘); canvas.style.cursor = ‘default‘; init(); }); btFind.addEventListener(‘click‘, function(){ btInit.setAttribute(‘disabled‘, ‘disabled‘); btFind.setAttribute(‘disabled‘, ‘disabled‘); btMarker.removeAttribute(‘disabled‘); canvas.style.cursor = ‘default‘; cancelAnimationFrame(raf); angle = document.querySelector(‘#angle‘).value * 1; speed = document.querySelector(‘#speed‘).value * 1; ts = new Date().getTime(); raids(); }); btMarker.addEventListener(‘click‘, function(){ btFind.removeAttribute(‘disabled‘); canvas.style.cursor = ‘crosshair‘; cancelAnimationFrame(raf); te = new Date().getTime(); marker(); }); canvas.addEventListener(‘mousemove‘, function(event){ var x = Math.floor(event.clientX - this.getBoundingClientRect().left) - 260; var y = Math.floor(event.clientY - this.getBoundingClientRect().top) - 260; x = x>260 ? x-520 : x; document.querySelector(‘p‘).textContent = ‘(‘ + x + ‘,‘ + -y + ‘)‘; }) canvas.addEventListener(‘click‘, function(event){ if (!find) return; btInit.removeAttribute(‘disabled‘); btFind.setAttribute(‘disabled‘, ‘disabled‘); btMarker.setAttribute(‘disabled‘, ‘disabled‘); var x = Math.floor(event.clientX - this.getBoundingClientRect().left); var y = Math.floor(event.clientY - this.getBoundingClientRect().top); point.push([x,y,0]); console.log(x + ‘,‘ + y) ctx.lineWidth = 3; ctx.strokeStyle = ‘orange‘; ctx.strokeRect(x-10,y-10, 20,20); find = false; check(); }); } function init(){ pointNum = document.querySelector(‘#pointNum‘).value * 1; if (document.querySelector(‘#pointColor‘).checked) pointColor = color.length; else pointColor = 1; ctx.clearRect(0, 0, 1050, 520); ctx.lineWidth = 1; ctx.strokeStyle=‘#ccc‘; lineData = ctx.createImageData(520, 520); pointData1 = ctx.createImageData(520, 520); pointData2 = ctx.createImageData(520, 520); var p = 250, k = 0; point = []; hide = Math.floor(Math.random() * pointNum); var draw = setInterval(function(){ var x,y; for (var i = 0; i < 30; i++) { do{ x = Math.floor(Math.random() * 500 - 250); y = Math.floor(Math.random() * 500 - 250); } while (x*x + y*y > p*p) var c = Math.floor(Math.random() * pointColor); if (drawPoint(x,y,c)){ k++; point.push([x,y,c]) } if (k>=pointNum) { clearInterval(draw); pointData1 = ctx.getImageData(0,0, 520,520); pointData2 = ctx.getImageData(520,0, 520,520); btInit.removeAttribute(‘disabled‘); btFind.removeAttribute(‘disabled‘); // drawLine(); break; } }; }, 30); } function drawLine(){ ctx.lineWidth = 1; ctx.save(); ctx.translate(260,260); for (var i = 0; i < 6; i++) { ctx.rotate(Math.PI*30/180); ctx.moveTo(-260,0); ctx.lineTo(260,0); ctx.stroke(); }; ctx.restore(); ctx.save(); ctx.translate(260+520,260); for (var i = 0; i < 3; i++) { ctx.beginPath(); ctx.arc(0,0, 60+i*100, 0,2*Math.PI); ctx.stroke(); }; for (var i = 0; i < 6; i++) { ctx.rotate(Math.PI*30/180); ctx.moveTo(-260,0); ctx.lineTo(260,0); ctx.stroke(); }; ctx.restore(); } function drawPoint(x,y,c){ var p = ctx.getImageData(260+x,260+y, pointSize,pointSize); var pc = p.data; for (var i = 0; i < pc.length; i+=4) { if (pc[i]!=0 || pc[i+1]!=0 || pc[i+2]!=0) { return false; } }; ctx.fillStyle = color[c]; ctx.fillRect(260+x,260+y, pointSize,pointSize); if (hide != point.length) ctx.fillRect(260+x+520,260+y, pointSize,pointSize); return true; } function raids(){ ctx.clearRect(0, 0, 1050, 520); ctx.putImageData(pointData1, 0,0); ctx.fillStyle = ‘#000‘; ctx.beginPath(); ctx.moveTo(260,260); ctx.arc(260,260, 255, Math.PI * ang/180, Math.PI * (360-angle + ang)/180); ctx.fill(); ctx.putImageData(pointData2, 520,0); ctx.fillStyle = ‘#000‘; ctx.beginPath(); ctx.moveTo(260+520,260); ctx.arc(260+520,260, 255, Math.PI * ang/180, Math.PI * (360-angle + ang)/180); ctx.fill(); ang += speed; raf = window.requestAnimationFrame(raids); } function marker(){ ctx.clearRect(0, 0, 1050, 520); ctx.putImageData(pointData1, 0,0); find = true; } function check(){ ctx.putImageData(pointData2, 520,0); ctx.strokeStyle = ‘red‘; ctx.lineWidth = 3; ctx.strokeRect(point[hide][0]-10+260,point[hide][1]-10+260, 20,20); ctx.strokeRect(point[hide][0]-10+260+520,point[hide][1]-10+260, 20,20); if ( Math.abs(point[hide][0]-point[pointNum][0])<10 && Math.abs(point[hide][1]-point[pointNum][1])<10 ) { alert(‘找到了!\n‘ + ‘用时:‘ + (te-ts) + ‘ 毫秒‘); } else { alert(‘错误!\n‘ + ‘用时:‘ + (te-ts) + ‘ 毫秒‘); } } </script> </body> </html>
标签:request str clear java ati amp val 做了 logs
原文地址:http://www.cnblogs.com/etopx/p/6687124.html