- <!DOCTYPE html>
- <html>
- <head>
- <title>
- Canvas射箭小游戏
- </title>
- </head>
- <style type="text/css">
- body{ margin:0; background:#222; margin:20px; } svg{ width:100%; height:100%;
- position:fixed; top:0; left:0; } span{ color:white; font-family:sans-serif;
- opacity:.3; }
- </style>
- <script src="http://demo.mycodes.net/youxi/canvas_shejian/js/TweenMax.min.js">
- </script>
- <script src="http://demo.mycodes.net/youxi/canvas_shejian/js/MorphSVGPlugin.min.js">
- </script>
- <body>
- <svg id="game" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 400"
- overflow="visible">
- <linearGradient id="ArcGradient">
- <stop offset="0" stop-color="#fff" stop-opacity=".2" />
- <stop offset="50%" stop-color="#fff" stop-opacity="0" />
- </linearGradient>
- <path id="arc" fill="none" stroke="url(#ArcGradient)" stroke-width="4"
- d="M100,250c250-400,550-400,800,0" pointer-events="none" />
- <defs>
- <g id="arrow">
- <line x2="60" fill="none" stroke="#888" stroke-width="2" />
- <polygon fill="#fdfdfd" points="64 0 58 2 56 0 58 -2" />
- <polygon fill="#88ce02" points="2 -3 -4 -3 -1 0 -4 3 2 3 5 0" />
- </g>
- </defs>
- <g id="target">
- <path fill="#FFF" d="M924.2,274.2c-21.5,21.5-45.9,19.9-52,3.2c-4.4-12.1,2.4-29.2,14.2-41c11.8-11.8,29-18.6,41-14.2 C944.1,228.3,945.7,252.8,924.2,274.2z"
- />
- <path fill="#F4531C" d="M915.8,265.8c-14.1,14.1-30.8,14.6-36,4.1c-4.1-8.3,0.5-21.3,9.7-30.5s22.2-13.8,30.5-9.7 C930.4,235,929.9,251.7,915.8,265.8z"
- />
- <path fill="#FFF" d="M908.9,258.9c-8,8-17.9,9.2-21.6,3.5c-3.2-4.9-0.5-13.4,5.6-19.5c6.1-6.1,14.6-8.8,19.5-5.6 C918.1,241,916.9,250.9,908.9,258.9z"
- />
- <path fill="#F4531C" d="M903.2,253.2c-2.9,2.9-6.7,3.6-8.3,1.7c-1.5-1.8-0.6-5.4,2-8c2.6-2.6,6.2-3.6,8-2 C906.8,246.5,906.1,250.2,903.2,253.2z"
- />
- </g>
- <g id="bow" fill="none" stroke-linecap="round" vector-effect="non-scaling-stroke"
- pointer-events="none">
- <polyline fill="none" stroke="#ddd" stroke-linecap="round" points="88,200 88,250 88,300"
- />
- <path fill="none" stroke="#88ce02" stroke-width="3" stroke-linecap="round"
- d="M88,300 c0-10.1,12-25.1,12-50s-12-39.9-12-50" />
- </g>
- <g class="arrow-angle">
- <use x="100" y="250" xlink:href="#arrow" />
- </g>
- <clipPath id="mask">
- <polygon opacity=".5" points="0,0 1500,0 1500,200 970,290 950,240 925,220 875,280 890,295 920,310 0,350"
- pointer-events="none" />
- </clipPath>
- <g class="arrows" clip-path="url(#mask)" pointer-events="none">
- </g>
- <g class="miss" fill="#aaa" opacity="0" transform="translate(0, 100)">
- <path d="M358 194L363 118 386 120 400 153 416 121 440 119 446 203 419 212 416 163 401 180 380 160 381 204"
- />
- <path d="M450 120L458 200 475 192 474 121" />
- <path d="M537 118L487 118 485 160 515 162 509 177 482 171 482 193 529 199 538 148 501 146 508 133 537 137"
- />
- <path d="M540 202L543 178 570 186 569 168 544 167 546 122 590 116 586 142 561 140 560 152 586 153 586 205"
- />
- <path d="M595,215l5-23l31,0l-5,29L595,215z M627,176l13-70l-41-0l-0,70L627,176z"
- />
- </g>
- <g class="bullseye" fill="#F4531C" opacity="0">
- <path d="M322,159l15-21l-27-13l-32,13l15,71l41-14l7-32L322,159z M292,142h20l3,8l-16,8 L292,142z M321,182l-18,9l-4-18l23-2V182z"
- />
- <path d="M340 131L359 125 362 169 381 167 386 123 405 129 392 183 351 186z"
- />
- <path d="M413 119L402 188 450 196 454 175 422 175 438 120z" />
- <path d="M432 167L454 169 466 154 451 151 478 115 453 113z" />
- <path d="M524 109L492 112 466 148 487 155 491 172 464 167 463 184 502 191 513 143 487 141 496 125 517 126z"
- />
- <path d="M537 114L512 189 558 199 566 174 533 175 539 162 553 164 558 150 543 145 547 134 566 148 575 124z"
- />
- <path d="M577 118L587 158 570 198 587 204 626 118 606 118 598 141 590 112z"
- />
- <path d="M635 122L599 198 643 207 649 188 624 188 630 170 639 178 645 162 637 158 649 143 662 151 670 134z"
- />
- <path d="M649,220l4-21l28,4l-6,25L649,220z M681,191l40-79l-35-8L659,184L681,191z"
- />
- </g>
- <g class="hit" fill="#ffcc00" opacity="0" transform="translate(180, -80) rotate(12) ">
- <path d="M383 114L385 195 407 191 406 160 422 155 418 191 436 189 444 112 423 119 422 141 407 146 400 113"
- />
- <path d="M449 185L453 113 477 112 464 186" />
- <path d="M486 113L484 130 506 130 481 188 506 187 520 131 540 135 545 119"
- />
- <path d="M526,195l5-20l22,5l-9,16L526,195z M558,164l32-44l-35-9l-19,51L558,164z"
- />
- </g>
- <!-- <line x1=" 875", y1=" 280", x2=" 925", y2=" 220" stroke="red"/>
- <circle class="point" r="7" fill="purple" opacity=".4" />
- -->
- </svg>
- <span>
- 点击弓然后射箭!
- </span>
- </body>
- <script type="text/javascript">
- var svg = document.querySelector("svg");
- var cursor = svg.createSVGPoint();
- var arrows = document.querySelector(".arrows");
- var randomAngle = 0;
- // center of target
- var target = {
- x: 900,
- y: 249.5
- };
- // target intersection line segment
- var lineSegment = {
- x1: 875,
- y1: 280,
- x2: 925,
- y2: 220
- };
- // bow rotation point
- var pivot = {
- x: 100,
- y: 250
- };
- aim({
- clientX: 320,
- clientY: 300
- });
- // set up start drag event
- window.addEventListener("mousedown", draw);
- function draw(e) {
- // pull back arrow
- randomAngle = (Math.random() * Math.PI * 0.03) - 0.015;
- TweenMax.to(".arrow-angle use", 0.3, {
- opacity: 1
- });
- window.addEventListener("mousemove", aim);
- window.addEventListener("mouseup", loose);
- aim(e);
- }
- function aim(e) {
- // get mouse position in relation to svg position and scale
- var point = getMouseSVG(e);
- point.x = Math.min(point.x, pivot.x - 7);
- point.y = Math.max(point.y, pivot.y + 7);
- var dx = point.x - pivot.x;
- var dy = point.y - pivot.y;
- // Make it more difficult by adding random angle each time
- var angle = Math.atan2(dy, dx) + randomAngle;
- var bowAngle = angle - Math.PI;
- var distance = Math.min(Math.sqrt((dx * dx) + (dy * dy)), 50);
- var scale = Math.min(Math.max(distance / 30, 1), 2);
- TweenMax.to("#bow", 0.3, {
- scaleX: scale,
- rotation: bowAngle + "rad",
- transformOrigin: "right center"
- });
- var arrowX = Math.min(pivot.x - ((1 / scale) * distance), 88);
- TweenMax.to(".arrow-angle", 0.3, {
- rotation: bowAngle + "rad",
- svgOrigin: "100 250"
- });
- TweenMax.to(".arrow-angle use", 0.3, {
- x: -distance
- });
- TweenMax.to("#bow polyline", 0.3, {
- attr: {
- points: "88,200 " + Math.min(pivot.x - ((1 / scale) * distance), 88) + ",250 88,300"
- }
- });
- var radius = distance * 9;
- var offset = {
- x: (Math.cos(bowAngle) * radius),
- y: (Math.sin(bowAngle) * radius)
- };
- var arcWidth = offset.x * 3;
- TweenMax.to("#arc", 0.3, {
- attr: {
- d: "M100,250c" + offset.x + "," + offset.y + "," + (arcWidth - offset.x) + "," + (offset.y + 50) + "," + arcWidth + ",50"
- },
- autoAlpha: distance / 60
- });
- }
- function loose() {
- // release arrow
- window.removeEventListener("mousemove", aim);
- window.removeEventListener("mouseup", loose);
- TweenMax.to("#bow", 0.4, {
- scaleX: 1,
- transformOrigin: "right center",
- ease: Elastic.easeOut
- });
- TweenMax.to("#bow polyline", 0.4, {
- attr: {
- points: "88,200 88,250 88,300"
- },
- ease: Elastic.easeOut
- });
- // duplicate arrow
- var newArrow = document.createElementNS("http://www.w3.org/2000/svg", "use");
- newArrow.setAttributeNS('http://www.w3.org/1999/xlink', 'href', "#arrow");
- arrows.appendChild(newArrow);
- // animate arrow along path
- var path = MorphSVGPlugin.pathDataToBezier("#arc");
- TweenMax.to([newArrow], 0.5, {
- force3D: true,
- bezier: {
- type: "cubic",
- values: path,
- autoRotate: ["x", "y", "rotation"]
- },
- onUpdate: hitTest,
- onUpdateParams: ["{self}"],
- onComplete: onMiss,
- ease: Linear.easeNone
- });
- TweenMax.to("#arc", 0.3, {
- opacity: 0
- });
- //hide previous arrow
- TweenMax.set(".arrow-angle use", {
- opacity: 0
- });
- }
- function hitTest(tween) {
- // check for collisions with arrow and target
- var arrow = tween.target[0];
- var transform = arrow._gsTransform;
- var radians = transform.rotation * Math.PI / 180;
- var arrowSegment = {
- x1: transform.x,
- y1: transform.y,
- x2: (Math.cos(radians) * 60) + transform.x,
- y2: (Math.sin(radians) * 60) + transform.y
- }
- var intersection = getIntersection(arrowSegment, lineSegment);
- if (intersection.segment1 && intersection.segment2) {
- tween.pause();
- var dx = intersection.x - target.x;
- var dy = intersection.y - target.y;
- var distance = Math.sqrt((dx * dx) + (dy * dy));
- var selector = ".hit";
- if (distance < 7) {
- selector = ".bullseye"
- }
- showMessage(selector);
- }
- }
- function onMiss() {
- // Damn!
- showMessage(".miss");
- }
- function showMessage(selector) {
- // handle all text animations by providing selector
- TweenMax.killTweensOf(selector);
- TweenMax.killChildTweensOf(selector);
- TweenMax.set(selector, {
- autoAlpha: 1
- });
- TweenMax.staggerFromTo(selector + " path", .5, {
- rotation: -5,
- scale: 0,
- transformOrigin: "center"
- },
- {
- scale: 1,
- ease: Back.easeOut
- },
- .05);
- TweenMax.staggerTo(selector + " path", .3, {
- delay: 2,
- rotation: 20,
- scale: 0,
- ease: Back.easeIn
- },
- .03);
- }
- function getMouseSVG(e) {
- // normalize mouse position within svg coordinates
- cursor.x = e.clientX;
- cursor.y = e.clientY;
- return cursor.matrixTransform(svg.getScreenCTM().inverse());
- }
- function getIntersection(segment1, segment2) {
- // find intersection point of two line segments and whether or not the point is on either line segment
- var dx1 = segment1.x2 - segment1.x1;
- var dy1 = segment1.y2 - segment1.y1;
- var dx2 = segment2.x2 - segment2.x1;
- var dy2 = segment2.y2 - segment2.y1;
- var cx = segment1.x1 - segment2.x1;
- var cy = segment1.y1 - segment2.y1;
- var denominator = dy2 * dx1 - dx2 * dy1;
- if (denominator == 0) {
- return null;
- }
- var ua = (dx2 * cy - dy2 * cx) / denominator;
- var ub = (dx1 * cy - dy1 * cx) / denominator;
- return {
- x: segment1.x1 + ua * dx1,
- y: segment1.y1 + ua * dy1,
- segment1: ua >= 0 && ua <= 1,
- segment2: ub >= 0 && ub <= 1
- };
- }
- </script>
- </html>
来源: http://www.w3cfuns.com/notes/41996/9969c4f53d2e6fa06fd7c088ae00b8fc.html