| 1 | (function(){ |
| 2 | window.HPX = window.HPX || {}; |
| 3 | window.HPX['shockwave'] = function(el){ |
| 4 | const U = window.HPX._u; |
| 5 | const k = U.canvas(el), ctx = k.ctx; |
| 6 | const ac = U.accent(el,'#7c5cff'), ac2 = U.accent2(el,'#22d3ee'); |
| 7 | let waves = []; |
| 8 | let last = -1; |
| 9 | const stop = U.loop((t) => { |
| 10 | ctx.fillStyle = 'rgba(0,0,0,0.12)'; |
| 11 | ctx.fillRect(0,0,k.w,k.h); |
| 12 | if (t - last > 0.6){ last = t; waves.push({t:0}); } |
| 13 | const cx=k.w/2, cy=k.h/2; |
| 14 | const max = Math.hypot(k.w,k.h)/2; |
| 15 | waves = waves.filter(w => w.t < 1); |
| 16 | for (const w of waves){ |
| 17 | w.t += 0.012; |
| 18 | const r = w.t * max; |
| 19 | const alpha = 1 - w.t; |
| 20 | ctx.strokeStyle = w.t<0.5?ac2:ac; |
| 21 | ctx.globalAlpha = alpha; |
| 22 | ctx.lineWidth = 3 + (1-w.t)*3; |
| 23 | ctx.beginPath(); ctx.arc(cx,cy,r,0,Math.PI*2); ctx.stroke(); |
| 24 | ctx.strokeStyle = '#fff'; |
| 25 | ctx.lineWidth = 1; |
| 26 | ctx.globalAlpha = alpha*0.4; |
| 27 | ctx.beginPath(); ctx.arc(cx,cy,r*0.92,0,Math.PI*2); ctx.stroke(); |
| 28 | } |
| 29 | ctx.globalAlpha = 1; |
| 30 | // core |
| 31 | const g = ctx.createRadialGradient(cx,cy,0,cx,cy,40); |
| 32 | g.addColorStop(0,'rgba(255,255,255,0.9)'); |
| 33 | g.addColorStop(1,'rgba(124,92,255,0)'); |
| 34 | ctx.fillStyle = g; |
| 35 | ctx.beginPath(); ctx.arc(cx,cy,40,0,Math.PI*2); ctx.fill(); |
| 36 | }); |
| 37 | return { stop(){ stop(); k.destroy(); } }; |
| 38 | }; |
| 39 | })(); |
| 40 |