| Index: experimental/docs/svgbaseddoc.htm
|
| diff --git a/experimental/docs/svgbaseddoc.htm b/experimental/docs/svgbaseddoc.htm
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..c96edcc4f6db873c918956312b97b45d7d6f59a9
|
| --- /dev/null
|
| +++ b/experimental/docs/svgbaseddoc.htm
|
| @@ -0,0 +1,1712 @@
|
| +<!DOCTYPE html>
|
| +<html lang="en">
|
| +<head>
|
| +
|
| +
|
| +<style>
|
| +html {
|
| + font-family: Helvetica, Arial, sans-serif;
|
| + font-size: 100%;
|
| +}
|
| +
|
| +.controls {
|
| + margin: 1em 0;
|
| +}
|
| +
|
| +button {
|
| + display: inline-block;
|
| + border-radius: 3px;
|
| + border: none;
|
| + font-size: 0.9rem;
|
| + padding: 0.4rem 0.8em;
|
| + background: #69c773;
|
| + border-bottom: 1px solid #498b50;
|
| + color: white;
|
| + -webkit-font-smoothing: antialiased;
|
| + font-weight: bold;
|
| + margin: 0 0.25rem;
|
| + text-align: center;
|
| +}
|
| +
|
| +button:hover, button:focus {
|
| + opacity: 0.75;
|
| + cursor: pointer;
|
| +}
|
| +
|
| +button:active {
|
| + opacity: 1;
|
| + box-shadow: 0 -3px 10px rgba(0, 0, 0, 0.1) inset;
|
| +}
|
| +
|
| +</style>
|
| +
|
| +<! set height back to 500 />
|
| +<svg id="svg" width="800" height="500"
|
| + xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
|
| +
|
| +<defs>
|
| + <radialGradient id="grad1" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(0,0,255); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(0,0,255); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad2" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(0,255,0); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(0,255,0); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad3" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(255,0,0); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(255,0,0); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad4" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(192,63,192); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(192,63,192); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad5" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(127,127,0); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(127,127,0); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad6" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(127,0,127); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(127,0,127); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad7" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(0,127,127); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(0,127,127); stop-opacity:0" />
|
| + </radialGradient>
|
| + <radialGradient id="grad8" cx="200" cy="200" r="300" gradientUnits="userSpaceOnUse">
|
| + <stop offset="0%" style="stop-color:rgb(63,192,63); stop-opacity:0.3" />
|
| + <stop offset="100%" style="stop-color:rgb(63,192,63); stop-opacity:0" />
|
| + </radialGradient>
|
| +</defs>
|
| +
|
| +<path id="circleFill" d="M300,200 A 100,100 0,0,0 300,200" fill="#777" fill-opacity="0" />
|
| +<path id="circle" d="M300,200 A 100,100 0,0,0 300,200" fill="none" stroke="black" />
|
| +
|
| +<! elements for keyframe 1 />
|
| +<text id="spanWedgeDesc" fill-opacity="0" >
|
| +All spans are contained by a wedge.
|
| +</text>
|
| +<path id="span1" d="M200,200 Q300,300 200,300" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="span2" d="M200,200 C100,300 100,400 200,300" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="span3" d="M200,200 C300,100 100,400 300,200" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="wedge1" d="M200,200 L500,500 A 424.26,424.26 0,0,1 200,624.26 z" fill="url(#grad1)" fill-opacity="0"/>
|
| +<path id="wedge2" d="M200,200 L200,624.26 A 424.26,424.26 0,0,1 -100,500 z" fill="url(#grad2)" fill-opacity="0"/>
|
| +<path id="wedge3" d="M200,200 L500,-100 A 424.26,424.26 0,0,1 240,622.5 z" fill="url(#grad3)" fill-opacity="0"/>
|
| +
|
| +<! keyframe 2 />
|
| +<text id="trivialWedgeDesc1" fill-opacity="0" >
|
| +Wedges that don't overlap can be
|
| +</text>
|
| +<text id="trivialWedgeDesc2" y="240" fill-opacity="0" >
|
| +easily sorted.
|
| +</text>
|
| +<path id="span4" d="M200,200 Q300,300 400,300" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="span5" d="M200,200 Q280,320 200,400" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="span6" d="M200,200 Q60,340 100,400" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="wedge4" d="M200,200 L500,500 A 424.26,424.26 0,0,1 579.47,389.74 z" fill="url(#grad1)" fill-opacity="0"/>
|
| +<path id="wedge5" d="M200,200 L389.74,579.47 A 424.26,424.26 0,0,1 200,500 z" fill="url(#grad2)" fill-opacity="0"/>
|
| +<path id="wedge6" d="M200,200 L10.26,579.47 A 424.26,424.26 0,0,1 -100,500 z" fill="url(#grad3)" fill-opacity="0"/>
|
| +
|
| +
|
| +<! keyframe 3 />
|
| +<text id="sectorDesc1" fill-opacity="0" >
|
| +A sector is a wedge of a circle
|
| +</text>
|
| +<text id="sectorDesc2" y="240" fill-opacity="0" >
|
| +containing a range of points.
|
| +</text>
|
| +<g id="xaxis" stroke-opacity="0" fill-opacity="0">
|
| + <path d="M100,200 L300,200" fill="none" stroke="rgb(191,191,191)"/>
|
| + <text x="100" y="220" fill="rgb(191,191,191)">-X</text>
|
| + <text x="300" y="220" text-anchor="end" fill="rgb(191,191,191)">+X</text>
|
| +</g>
|
| +<g id="yaxis" stroke-opacity="0" fill-opacity="0">
|
| + <path d="M200,100 L200,300" fill="none" stroke="rgb(191,191,191)"/>
|
| + <text x="205" y="100" alignment-baseline="hanging" fill="rgb(191,191,191)">-Y</text>
|
| + <text x="205" y="300" fill="rgb(191,191,191)">+Y</text>
|
| +</g>
|
| +<text id="sectorDescXYA" x="500" y="310" fill="rgb(0,0,255)" fill-opacity="0">
|
| +X > 0> Y > 0 Y < X</text>
|
| +<text id="sectorDescXYB" x="500" y="360" fill="rgb(0,127,0)" fill-opacity="0">
|
| +X < 0 Y > 0 -Y < X</text>
|
| +<text id="sectorDescXYC" x="500" y="410" fill="rgb(255,0,0)" fill-opacity="0">
|
| +X < 0 Y < 0 Y < X</text>
|
| +<path id="wedgeXY8" d="M200,200 L500,500 A 424.26,424.26 0,0,1 624.26,200 z" fill="url(#grad1)" fill-opacity="0"/>
|
| +<path id="wedgeXY6" d="M200,200 L-100,500 A 424.26,424.26 0,0,1 200,624.26 z" fill="url(#grad2)" fill-opacity="0"/>
|
| +<path id="wedgeXY3" d="M200,200 L-100,-100 A 424.26,424.26 0,0,1 200,-175.74 z" fill="url(#grad3)" fill-opacity="0"/>
|
| +
|
| +<! keyframe 4 />
|
| +<text id="lineSingleDesc" fill-opacity="0" >
|
| +Line spans are contained by a single sector.
|
| +</text>
|
| +<text id="sectorDescXY1" x="500" y="460" fill="rgb(192,63,192)" fill-opacity="0">
|
| +X > 0 Y < 0 -Y < X</text>
|
| +<text id="sectorDescXY2" x="500" y="460" fill="rgb(127,127,0)" fill-opacity="0">
|
| +X > 0 Y < 0 -Y > X</text>
|
| +<text id="sectorDescXY3" x="500" y="460" fill="rgb(255,0,0)" fill-opacity="0">
|
| +X < 0 Y < 0 Y < X</text>
|
| +<text id="sectorDescXY4" x="500" y="460" fill="rgb(127,0,127)" fill-opacity="0">
|
| +X < 0 Y < 0 Y > X</text>
|
| +<text id="sectorDescXY5" x="500" y="460" fill="rgb(0,127,127)" fill-opacity="0">
|
| +X < 0 Y > 0 -Y < X</text>
|
| +<text id="sectorDescXY6" x="500" y="460" fill="rgb(0,127,0)" fill-opacity="0">
|
| +X < 0 Y > 0 -Y < X</text>
|
| +<text id="sectorDescXY7" x="500" y="460" fill="rgb(63,192,63)" fill-opacity="0">
|
| +X > 0 Y > 0 Y > X</text>
|
| +<text id="sectorDescXY8" x="500" y="460" fill="rgb(0,0,255)" fill-opacity="0">
|
| +X > 0 Y > 0 Y < X</text>
|
| +<path id="wedgeXY1" d="M200,200 L500,-100 A 424.26,424.26 0,0,1 624.26,200 z" fill="url(#grad4)" fill-opacity="0"/>
|
| +<path id="wedgeXY2" d="M200,200 L200,-175.74 A 424.26,424.26 0,0,1 500,-100 z" fill="url(#grad5)" fill-opacity="0"/>
|
| +<path id="wedgeXY4" d="M200,200 L-175.74,200 A 424.26,424.26 0,0,1 -100,-100 z" fill="url(#grad6)" fill-opacity="0"/>
|
| +<path id="wedgeXY5" d="M200,200 L-100,500 A 424.26,424.26 0,0,1 -175.74,200 z" fill="url(#grad7)" fill-opacity="0"/>
|
| +<path id="wedgeXY7" d="M200,200 L200,624.26 A 424.26,424.26 0,0,1 500,500 z" fill="url(#grad8)" fill-opacity="0"/>
|
| +<path id="lineSegment" d="M200,200 L200,624.26" fill="none" stroke="black" stroke-opacity="0"/>
|
| +
|
| +<! keyframe 5 />
|
| +<text id="curveMultipleDesc1" fill-opacity="0" >
|
| +A curve span may cover more
|
| +</text>
|
| +<text id="curveMultipleDesc2" y="240" fill-opacity="0" >
|
| +than one sector.
|
| +</text>
|
| +<path id="curveSegment" d="M200,200 C250,200 300,150 300,100" fill="none" stroke="black" stroke-opacity="0"/>
|
| +<path id="curveSegment1" d="M200,200 C250,200 300,150 300,100" fill="none"/>
|
| +<path id="curveSegment2" d="M200,200 C250,200 300,150 200,100" fill="none"/>
|
| +<path id="curveSegment3" d="M200,200 C350,200 250,-150 170,300" fill="none"/>
|
| +
|
| +<! keyframe 6 />
|
| +<text id="line1DDest1" fill-opacity="0" >
|
| +Some lines occupy one-dimensional
|
| +</text>
|
| +<text id="line1DDest2" y="240" fill-opacity="0" >
|
| +sectors.
|
| +</text>
|
| +<text id="sectorDescXY9" x="500" y="460" fill="rgb(192,92,31)" fill-opacity="0">
|
| +X > 0 Y == 0</text>
|
| +<text id="sectorDescXY10" x="500" y="460" fill="rgb(31,92,192)" fill-opacity="0">
|
| +Y > 0 0 == X</text>
|
| +<text id="sectorDescXY11" x="500" y="460" fill="rgb(127,63,127)" fill-opacity="0">
|
| +X < 0 Y == X</text>
|
| +<path id="horzSegment" d="M200,200 L341.4,200" fill="none" stroke="rgb(192,92,31)" stroke-width="2" stroke-opacity="0"/>
|
| +<path id="vertSegment" d="M200,200 L200,341.4" fill="none" stroke="rgb(31,92,192)" stroke-width="2" stroke-opacity="0"/>
|
| +<path id="diagSegment" d="M200,200 L100,100" fill="none" stroke="rgb(127,63,127)" stroke-width="2" stroke-opacity="0"/>
|
| +
|
| +<! keyframe 7 />
|
| +<text id="curve1dDesc1" fill-opacity="0" >
|
| +Some curves initially occupy
|
| +</text>
|
| +<text id="curve1dDesc2" y="240" fill-opacity="0" >
|
| +one-dimensional sectors, then diverge.
|
| +</text>
|
| +<path id="cubicSegment" fill="none" stroke="black" />
|
| +<path id="cubicSegment1" d="M200,200 C200,200 200,200 200,200" fill="none" />
|
| +<path id="cubicSegment2" d="M200,200 C250,200 300,200 300,100" fill="none"/>
|
| +
|
| +<text id="sectorNumberDesc" fill-opacity="0" >
|
| +Each sector is assigned a number.
|
| +</text>
|
| +<text id="spanSectorDesc" fill-opacity="0" >
|
| +Each span has a bit set for one or more sectors.
|
| +</text>
|
| +<text id="bitOverDesc" fill-opacity="0" >
|
| +Span sets allow rough sorting without angle computation.
|
| +</text>
|
| +
|
| +</svg>
|
| +
|
| +<! canvas support />
|
| +<script>
|
| +
|
| +var keyFrameQueue = [];
|
| +var animationsPending = [];
|
| +var animationsActive = [];
|
| +var displayList = [];
|
| +var visibleFinished = [];
|
| +
|
| +var animationState = {};
|
| +animationState.reset = function () {
|
| + this.start = null;
|
| + this.time = 0;
|
| + this.requestID = null;
|
| + this.paused = false;
|
| + this.displayEngine = 'Canvas';
|
| +}
|
| +
|
| +circle.center = { x: 200, y: 200 }
|
| +circle.radius = 100;
|
| +
|
| +function assert(condition) {
|
| + if (!condition) debugger;
|
| +}
|
| +
|
| +function CanvasGrads(ctx) {
|
| + var grad1 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad1.addColorStop(0, "rgba(0,0,255, 0.3)");
|
| + grad1.addColorStop(1, "rgba(0,0,255, 0)");
|
| + var grad2 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad2.addColorStop(0, "rgba(0,255,0, 0.3)");
|
| + grad2.addColorStop(1, "rgba(0,255,0, 0)");
|
| + var grad3 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad3.addColorStop(0, "rgba(255,0,0, 0.3)");
|
| + grad3.addColorStop(1, "rgba(255,0,0, 0)");
|
| + var grad4 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad4.addColorStop(0, "rgba(192,63,192, 0.3)");
|
| + grad4.addColorStop(1, "rgba(192,63,192, 0)");
|
| + var grad5 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad5.addColorStop(0, "rgba(127,127,0, 0.3)");
|
| + grad5.addColorStop(1, "rgba(127,127,0, 0)");
|
| + var grad6 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad6.addColorStop(0, "rgba(127,0,127, 0.3)");
|
| + grad6.addColorStop(1, "rgba(127,0,127, 0)");
|
| + var grad7 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad7.addColorStop(0, "rgba(0,127,127, 0.3)");
|
| + grad7.addColorStop(1, "rgba(0,127,127, 0)");
|
| + var grad8 = ctx.createRadialGradient(200, 200, 0, 200, 200, 300);
|
| + grad8.addColorStop(0, "rgba(63,192,63, 0.3)");
|
| + grad8.addColorStop(1, "rgba(63,192,63, 0)");
|
| + var data = {
|
| + grad1: grad1,
|
| + grad2: grad2,
|
| + grad3: grad3,
|
| + grad4: grad4,
|
| + grad5: grad5,
|
| + grad6: grad6,
|
| + grad7: grad7,
|
| + grad8: grad8,
|
| + };
|
| + return data;
|
| +}
|
| +
|
| +function skip_sep(data) {
|
| + if (!data.length) {
|
| + return data;
|
| + }
|
| + while (data[0] == ' ' || data[0] == ',') {
|
| + data = data.substring(1);
|
| + }
|
| + return data;
|
| +}
|
| +
|
| +function find_points(str, value, count, isRelative, relative) {
|
| + var numRegEx = /-?\d+\.?\d*(?:e-?\d+)?/g;
|
| + var match;
|
| + for (var index = 0; index < count; ++index) {
|
| + str = skip_sep(str);
|
| + match = numRegEx.exec(str);
|
| + assert(match);
|
| + var x = Number(match[0]);
|
| + str = skip_sep(str);
|
| + match = numRegEx.exec(str);
|
| + assert(match);
|
| + var y = Number(match[0]);
|
| + value[index] = { x: x, y : y };
|
| + }
|
| + if (isRelative) {
|
| + for (var index = 0; index < count; index++) {
|
| + value[index].x += relative.x;
|
| + value[index].y += relative.y;
|
| + }
|
| + }
|
| + return str.substring(match.index + match[0].length);
|
| +}
|
| +
|
| +function find_scalar(str, obj, isRelative, relative) {
|
| + var numRegEx = /-?\d+\.?\d*(?:e-?\d+)?/g;
|
| + str = skip_sep(str);
|
| + var match = numRegEx.exec(str);
|
| + obj.value = Number(match[0]);
|
| + if (isRelative) {
|
| + obj.value += relative;
|
| + }
|
| + return str.substring(match.index + match[0].length);
|
| +}
|
| +
|
| +function parse_path(data) {
|
| + var path = "ctx.beginPath();\n";
|
| + var f = {x:0, y:0};
|
| + var c = {x:0, y:0};
|
| + var lastc = {x:0, y:0};
|
| + var points = [];
|
| + var op = '\0';
|
| + var previousOp = '\0';
|
| + var relative = false;
|
| + for (;;) {
|
| + data = skip_sep(data);
|
| + if (!data.length) {
|
| + break;
|
| + }
|
| + var ch = data[0];
|
| + if (('0' <= ch && ch <= '9') || ch == '-' || ch == '+') {
|
| + assert(op != '\0');
|
| + } else if (ch == ' ' || ch == ',') {
|
| + data = skip_sep(data);
|
| + } else {
|
| + op = ch;
|
| + relative = false;
|
| + if ('a' <= op && op <= 'z') {
|
| + op = op.toUpperCase();
|
| + relative = true;
|
| + }
|
| + data = data.substring(1);
|
| + data = skip_sep(data);
|
| + }
|
| + switch (op) {
|
| + case 'A':
|
| + var radii = [];
|
| + data = find_points(data, radii, 1, false, null);
|
| + var xaxisObj = {};
|
| + data = find_scalar(data, xaxisObj, false, null);
|
| + var largeArcObj = {};
|
| + data = find_scalar(data, largeArcObj, false, null);
|
| + var sweepObj = {};
|
| + data = find_scalar(data, sweepObj, false, null);
|
| + data = find_points(data, points, 1, relative, c);
|
| + var mid = { x: (c.x + points[0].x) / 2, y: (c.y + points[0].y) / 2 };
|
| + var midVec = { x: mid.x - c.x, y: mid.y - c.y };
|
| + var midLenSqr = midVec.x * midVec.x + midVec.y * midVec.y;
|
| + var radius = radii[0].x;
|
| + var scale = Math.sqrt(midLenSqr) / Math.sqrt(radius * radius - midLenSqr);
|
| + var tangentPt = { x: mid.x + midVec.y * scale,
|
| + y: mid.y - midVec.x * scale };
|
| + path += "ctx.arcTo(" + tangentPt.x + "," + tangentPt.y + ","
|
| + + points[0].x + "," + points[0].y + "," + radius + ");\n";
|
| + c = points[0];
|
| + break;
|
| + case 'M':
|
| + data = find_points(data, points, 1, relative, c);
|
| + path += "ctx.moveTo(" + points[0].x + "," + points[0].y + ");\n";
|
| + op = 'L';
|
| + c = points[0];
|
| + break;
|
| + case 'L':
|
| + data = find_points(data, points, 1, relative, c);
|
| + path += "ctx.lineTo(" + points[0].x + "," + points[0].y + ");\n";
|
| + c = points[0];
|
| + break;
|
| + case 'H': {
|
| + var xObj = {};
|
| + data = find_scalar(data, xObj, relative, c.x);
|
| + path += "ctx.lineTo(" + xObj.value + "," + c.y + ");\n";
|
| + c.x = xObj.value;
|
| + } break;
|
| + case 'V': {
|
| + var yObj = {};
|
| + data = find_scalar(data, y, relative, c.y);
|
| + path += "ctx.lineTo(" + c.x + "," + yObj.value+ ");\n";
|
| + c.y = yObj.value;
|
| + } break;
|
| + case 'C':
|
| + data = find_points(data, points, 3, relative, c);
|
| + path += "ctx.bezierCurveTo(" + points[0].x + "," + points[0].y + ","
|
| + + points[1].x + "," + points[1].y + ","
|
| + + points[2].x + "," + points[2].y + ");\n";
|
| + lastc = points[1];
|
| + c = points[2];
|
| + break;
|
| + case 'S':
|
| + var pts2_3 = [];
|
| + data = find_points(data, pts2_3, 2, relative, c);
|
| + points[0] = c;
|
| + points[1] = pts2_3[0];
|
| + points[2] = pts2_3[1];
|
| + if (previousOp == 'C' || previousOp == 'S') {
|
| + points[0].x -= lastc.x - c.x;
|
| + points[0].y -= lastc.y - c.y;
|
| + }
|
| + path += "ctx.bezierCurveTo(" + points[0].x + "," + points[0].y + ","
|
| + + points[1].x + "," + points[1].y + ","
|
| + + points[2].x + "," + points[2].y + ");\n";
|
| + lastc = points[1];
|
| + c = points[2];
|
| + break;
|
| + case 'Q': // Quadratic Bezier Curve
|
| + data = find_points(data, points, 2, relative, c);
|
| + path += "ctx.quadraticCurveTo(" + points[0].x + "," + points[0].y + ","
|
| + + points[1].x + "," + points[1].y + ");\n";
|
| + lastc = points[0];
|
| + c = points[1];
|
| + break;
|
| + case 'T':
|
| + var pts2 = [];
|
| + data = find_points(data, pts2, 1, relative, c);
|
| + points[0] = pts2[0];
|
| + points[1] = pts2[0];
|
| + if (previousOp == 'Q' || previousOp == 'T') {
|
| + points[0].x = c.x * 2 - lastc.x;
|
| + points[0].y = c.y * 2 - lastc.y;
|
| + }
|
| + path += "ctx.quadraticCurveTo(" + points[0].x + "," + points[0].y + ","
|
| + + points[1].x + "," + points[1].y + ");\n";
|
| + path.quadTo(points[0], points[1]);
|
| + lastc = points[0];
|
| + c = points[1];
|
| + break;
|
| + case 'Z':
|
| + path += "ctx.closePath();\n";
|
| + c = f;
|
| + op = '\0';
|
| + break;
|
| + case '~':
|
| + var args = [];
|
| + data = find_points(data, args, 2, false, null);
|
| + path += "moveTo(" + args[0].x + "," + args[0].y + ");\n";
|
| + path += "lineTo(" + args[1].x + "," + args[1].y + ");\n";
|
| + break;
|
| + default:
|
| + return false;
|
| + }
|
| + if (previousOp == 0) {
|
| + f = c;
|
| + }
|
| + previousOp = op;
|
| + }
|
| + return path;
|
| +}
|
| +
|
| +function CanvasPaths(ctx) {
|
| + var svgStrs = {
|
| + // keyframe 1
|
| + span1: "M200,200 Q300,300 200,300",
|
| + span2: "M200,200 C100,300 100,400 200,300",
|
| + span3: "M200,200 C300,100 100,400 300,200",
|
| + wedge1: "M200,200 L500,500 A 424.26,424.26 0,0,1 200,624.26 z",
|
| + wedge2: "M200,200 L200,624.26 A 424.26,424.26 0,0,1 -100,500 z",
|
| + wedge3: "M200,200 L500,-100 A 424.26,424.26 0,0,1 240,622.5 z",
|
| + // keyframe 2
|
| + span4: "M200,200 Q300,300 400,300",
|
| + span5: "M200,200 Q280,320 200,400",
|
| + span6: "M200,200 Q60,340 100,400",
|
| + wedge4: "M200,200 L500,500 A 424.26,424.26 0,0,1 579.47,389.74 z",
|
| + wedge5: "M200,200 L389.74,579.47 A 424.26,424.26 0,0,1 200,500 z",
|
| + wedge6: "M200,200 L10.26,579.47 A 424.26,424.26 0,0,1 -100,500 z",
|
| + // keyframe 3
|
| + xaxis: "M100,200 L300,200",
|
| + yaxis: "M200,100 L200,300",
|
| + wedgeXY8: "M200,200 L500,500 A 424.26,424.26 0,0,1 624.26,200 z",
|
| + wedgeXY6: "M200,200 L-100,500 A 424.26,424.26 0,0,1 200,624.26 z",
|
| + wedgeXY3: "M200,200 L-100,-100 A 424.26,424.26 0,0,1 200,-175.74 z",
|
| + // keyframe 4
|
| + wedgeXY1: "M200,200 L500,-100 A 424.26,424.26 0,0,1 624.26,200 z",
|
| + wedgeXY2: "M200,200 L200,-175.74 A 424.26,424.26 0,0,1 500,-100 z",
|
| + wedgeXY4: "M200,200 L-175.74,200 A 424.26,424.26 0,0,1 -100,-100 z",
|
| + wedgeXY5: "M200,200 L-100,500 A 424.26,424.26 0,0,1 -175.74,200 z",
|
| + wedgeXY7: "M200,200 L200,624.26 A 424.26,424.26 0,0,1 500,500 z",
|
| + lineSegment: "M200,200 L200,624.26",
|
| + // keyframe 5
|
| + curveSegment: "M200,200 C250,200 300,150 300,100",
|
| + curveSegment1: "M200,200 C250,200 300,150 300,100",
|
| + curveSegment2: "M200,200 C250,200 300,150 200,100",
|
| + curveSegment3: "M200,200 C350,200 250,-150 170,300",
|
| + // keyframe 6
|
| + horzSegment: "M200,200 L341.4,200",
|
| + vertSegment: "M200,200 L200,341.4",
|
| + diagSegment: "M200,200 L100,100",
|
| + // keyframe 7
|
| + cubicSegment: "M200,200 C200,200 200,200 200,200",
|
| + cubicSegment1: "M200,200 C200,200 200,200 200,200",
|
| + cubicSegment2: "M200,200 C250,200 300,200 300,100",
|
| + };
|
| + var paths = [];
|
| + var keys = Object.keys(svgStrs);
|
| + for (var index in keys) {
|
| + var key = keys[index];
|
| + var str = svgStrs[key];
|
| + var path = parse_path(str);
|
| + var record = [];
|
| + paths[key] = {
|
| + str: str,
|
| + funcBody: path,
|
| + };
|
| + }
|
| + return paths;
|
| +}
|
| +
|
| +function canvas_fill_font(record) {
|
| + assert(record);
|
| + var str = 'ctx.font = "normal 1.3rem Helvetica,Arial";\n';
|
| + if (record.fillStyle) {
|
| + str += 'ctx.fillStyle = ' + record.fillStyle + ';\n';
|
| + }
|
| + return str;
|
| +}
|
| +
|
| +function canvas_fill_text(record) {
|
| + assert(record);
|
| + assert(typeof record.fillText == 'string');
|
| + return 'ctx.fillText("' + record.fillText + '"';
|
| +}
|
| +
|
| +function canvas_xy(record) {
|
| + var x = typeof record.x == "number" ? record.x : 400;
|
| + var y = typeof record.y == "number" ? record.y : 200;
|
| + return ', ' + x + ', ' + y + ');\n';
|
| +}
|
| +
|
| +function canvas_text_xy(record) {
|
| + return canvas_fill_text(record) + canvas_xy(record);
|
| +}
|
| +
|
| +function add_canvas_stroke(paths, data, id, strokeStyle) {
|
| + var record = {};
|
| + record.data = paths[id].funcBody;
|
| + record.style = 'ctx.strokeStyle = ' + (strokeStyle ? strokeStyle : '"black"') + ';\n';
|
| + record.draw = 'ctx.stroke();\n';
|
| + record.func = new Function('ctx', record.data + record.style + record.draw);
|
| + return data[id] = record;
|
| +}
|
| +
|
| +function add_canvas_style(record, style) {
|
| + record.style += style;
|
| + record.func = new Function('ctx', record.data + record.style + record.draw);
|
| +}
|
| +
|
| +function add_canvas_fill(paths, data, id, fillStyle) {
|
| + var record = {};
|
| + record.data = paths[id].funcBody;
|
| + record.style = 'ctx.fillStyle = ' + (fillStyle ? fillStyle : '"black"') + ';\n';
|
| + record.draw = 'ctx.fill();\n';
|
| + record.func = new Function('ctx', record.data + record.style + record.draw);
|
| + return data[id] = record;
|
| +}
|
| +
|
| +function add_canvas_text(data, id, params) {
|
| + var record = {};
|
| + record.style = canvas_fill_font(params);
|
| + record.draw = canvas_fill_text(params);
|
| + record.position = canvas_xy(params);
|
| + record.x = params.x;
|
| + record.y = params.y;
|
| + record.func = new Function('ctx', record.style + record.draw + record.position);
|
| + return data[id] = record;
|
| +}
|
| +
|
| +function keyframe1(grads, paths) {
|
| + var data = [];
|
| + add_canvas_text(data, "spanWedgeDesc", { fillText:"All spans are contained by a wedge" } );
|
| + add_canvas_stroke(paths, data, "span1");
|
| + add_canvas_stroke(paths, data, "span2");
|
| + add_canvas_stroke(paths, data, "span3");
|
| + add_canvas_fill(paths, data, "wedge1", "grads.grad1");
|
| + add_canvas_fill(paths, data, "wedge2", "grads.grad2");
|
| + add_canvas_fill(paths, data, "wedge3", "grads.grad3");
|
| + return data;
|
| +}
|
| +
|
| +function keyframe2(grads, paths) {
|
| + var data = [];
|
| + add_canvas_text(data, "trivialWedgeDesc1", { fillText:"Wedges that don't overlap can be" } );
|
| + add_canvas_text(data, "trivialWedgeDesc2", { fillText:"easily sorted.", y:240 } );
|
| + add_canvas_stroke(paths, data, "span4").debug = true;
|
| + add_canvas_stroke(paths, data, "span5");
|
| + add_canvas_stroke(paths, data, "span6");
|
| + add_canvas_fill(paths, data, "wedge4", "grads.grad1");
|
| + add_canvas_fill(paths, data, "wedge5", "grads.grad2");
|
| + add_canvas_fill(paths, data, "wedge6", "grads.grad3");
|
| + return data;
|
| +}
|
| +
|
| +function setup_axes(paths, data) {
|
| + var color = '"rgb(191,191,191)"';
|
| + var xaxis = add_canvas_stroke(paths, data, "xaxis", color);
|
| + xaxis.funcBody = canvas_fill_font( { fillStyle:color } );
|
| + xaxis.funcBody += canvas_text_xy( { fillText:"-X", x:100, y:220 } );
|
| + xaxis.funcBody += "ctx.textAlign = 'right';\n";
|
| + xaxis.funcBody += canvas_text_xy( { fillText:"+X", x:300, y:220 } );
|
| + xaxis.func = new Function('ctx', xaxis.data + xaxis.style + xaxis.draw + xaxis.funcBody);
|
| + var yaxis = add_canvas_stroke(paths, data, "yaxis", color);
|
| + yaxis.funcBody = canvas_fill_font( { fillStyle:color } );
|
| + yaxis.funcBody += "ctx.textBaseline = 'hanging';\n";
|
| + yaxis.funcBody += canvas_text_xy( { fillText:"-Y", x:205, y:100 } );
|
| + yaxis.funcBody += "ctx.textBaseline = 'alphabetic';\n";
|
| + yaxis.funcBody += canvas_text_xy( { fillText:"+Y", x:205, y:300 } );
|
| + yaxis.func = new Function('ctx', yaxis.data + yaxis.style + yaxis.draw + yaxis.funcBody);
|
| +}
|
| +
|
| +function keyframe3(grads, paths) {
|
| + var data = [];
|
| + add_canvas_text(data, "sectorDesc1", { fillText:"A sector is a wedge of a circle" } );
|
| + add_canvas_text(data, "sectorDesc2", { fillText:"containing a range of points.", y:240 } );
|
| + setup_axes(paths, data);
|
| + add_canvas_text(data, "sectorDescXYA",
|
| + { fillText:"X > 0 Y > 0 Y < X", x:500, y:310, fillStyle:'"rgb(0,0,255)"'} );
|
| + add_canvas_text(data, "sectorDescXYB",
|
| + { fillText:"X < 0 Y > 0 -Y < X", x:500, y:360, fillStyle:'"rgb(0,127,0)"'} );
|
| + add_canvas_text(data, "sectorDescXYC",
|
| + { fillText:"X < 0 Y < 0 Y < X", x:500, y:410, fillStyle:'"rgb(255,0,0)"'} );
|
| + add_canvas_fill(paths, data, "wedgeXY8", "grads.grad1");
|
| + add_canvas_fill(paths, data, "wedgeXY6", "grads.grad2");
|
| + add_canvas_fill(paths, data, "wedgeXY3", "grads.grad3");
|
| + return data;
|
| +}
|
| +
|
| +function keyframe4(grads, paths) {
|
| + var data = [];
|
| + setup_axes(paths, data);
|
| + add_canvas_text(data, "lineSingleDesc",
|
| + { fillText:"Line spans are contained by a single sector." } );
|
| + add_canvas_text(data, "sectorDescXY1",
|
| + { fillText:"X > 0 Y < 0 -Y < X", x:500, y:460, fillStyle:'"rgb(192,63,192)"'} );
|
| + add_canvas_text(data, "sectorDescXY2",
|
| + { fillText:"X > 0 Y < 0 -Y > X", x:500, y:460, fillStyle:'"rgb(127,127,0)"'} );
|
| + add_canvas_text(data, "sectorDescXY3",
|
| + { fillText:"X < 0 Y < 0 Y < X", x:500, y:460, fillStyle:'"rgb(255,0,0)"'} );
|
| + add_canvas_text(data, "sectorDescXY4",
|
| + { fillText:"X < 0 Y < 0 Y > X", x:500, y:460, fillStyle:'"rgb(127,0,127)"'} );
|
| + add_canvas_text(data, "sectorDescXY5",
|
| + { fillText:"X < 0 Y > 0 -Y < X", x:500, y:460, fillStyle:'"rgb(0,127,127)"'} );
|
| + add_canvas_text(data, "sectorDescXY6",
|
| + { fillText:"X < 0 Y > 0 -Y < X", x:500, y:460, fillStyle:'"rgb(0,127,0)"'} );
|
| + add_canvas_text(data, "sectorDescXY7",
|
| + { fillText:"X > 0 Y > 0 Y > X", x:500, y:460, fillStyle:'"rgb(63,192,63)"'} );
|
| + add_canvas_text(data, "sectorDescXY8",
|
| + { fillText:"X > 0 Y > 0 Y < X", x:500, y:460, fillStyle:'"rgb(0,0,255)"'} );
|
| + add_canvas_fill(paths, data, "wedgeXY1", "grads.grad4");
|
| + add_canvas_fill(paths, data, "wedgeXY2", "grads.grad5");
|
| + add_canvas_fill(paths, data, "wedgeXY3", "grads.grad3");
|
| + add_canvas_fill(paths, data, "wedgeXY4", "grads.grad6");
|
| + add_canvas_fill(paths, data, "wedgeXY5", "grads.grad7");
|
| + add_canvas_fill(paths, data, "wedgeXY6", "grads.grad2");
|
| + add_canvas_fill(paths, data, "wedgeXY7", "grads.grad8");
|
| + add_canvas_fill(paths, data, "wedgeXY8", "grads.grad1");
|
| + add_canvas_stroke(paths, data, "lineSegment");
|
| + return data;
|
| +}
|
| +
|
| +function keyframe5(grads, paths) {
|
| + var data = [];
|
| + setup_axes(paths, data);
|
| + add_canvas_text(data, "curveMultipleDesc1",
|
| + { fillText:"A curve span may cover more" } );
|
| + add_canvas_text(data, "curveMultipleDesc2",
|
| + { fillText:"than one sector.", y:240 } );
|
| + add_canvas_stroke(paths, data, "curveSegment");
|
| + add_canvas_text(data, "sectorDescXY1",
|
| + { fillText:"X > 0 Y < 0 -Y < X", x:500, y:460, fillStyle:'"rgb(192,63,192)"'} );
|
| + add_canvas_text(data, "sectorDescXY2",
|
| + { fillText:"X > 0 Y < 0 -Y > X", x:500, y:460, fillStyle:'"rgb(127,127,0)"'} );
|
| + add_canvas_text(data, "sectorDescXY3",
|
| + { fillText:"X < 0 Y < 0 Y < X", x:500, y:460, fillStyle:'"rgb(255,0,0)"'} );
|
| + add_canvas_text(data, "sectorDescXY4",
|
| + { fillText:"X < 0 Y < 0 Y > X", x:500, y:460, fillStyle:'"rgb(127,0,127)"'} );
|
| + add_canvas_text(data, "sectorDescXY5",
|
| + { fillText:"X < 0 Y > 0 -Y < X", x:500, y:460, fillStyle:'"rgb(0,127,127)"'} );
|
| + add_canvas_text(data, "sectorDescXY6",
|
| + { fillText:"X < 0 Y > 0 -Y < X", x:500, y:460, fillStyle:'"rgb(0,127,0)"'} );
|
| + add_canvas_fill(paths, data, "wedgeXY1", "grads.grad4");
|
| + add_canvas_fill(paths, data, "wedgeXY2", "grads.grad5");
|
| + add_canvas_fill(paths, data, "wedgeXY3", "grads.grad3");
|
| + add_canvas_fill(paths, data, "wedgeXY4", "grads.grad6");
|
| + add_canvas_fill(paths, data, "wedgeXY5", "grads.grad7");
|
| + add_canvas_fill(paths, data, "wedgeXY6", "grads.grad2");
|
| + return data;
|
| +}
|
| +
|
| +function keyframe6(grads, paths) {
|
| + var data = [];
|
| + setup_axes(paths, data);
|
| +
|
| + add_canvas_text(data, "line1DDest1",
|
| + { fillText:"Some lines occupy one-dimensional" } );
|
| + add_canvas_text(data, "line1DDest2",
|
| + { fillText:"sectors.", y:240 } );
|
| + add_canvas_text(data, "sectorDescXY9",
|
| + { fillText:"X > 0 Y == 0", x:500, y:460, fillStyle:'"rgb(192,92,31)"' } );
|
| + add_canvas_text(data, "sectorDescXY10",
|
| + { fillText:"Y > 0 0 == X", x:500, y:460, fillStyle:'"rgb(31,92,192)"' } );
|
| + add_canvas_text(data, "sectorDescXY11",
|
| + { fillText:"X < 0 Y == X", x:500, y:460, fillStyle:'"rgb(127,63,127)"' } );
|
| + var horz = add_canvas_stroke(paths, data, "horzSegment", '"rgb(192,92,31)"');
|
| + add_canvas_style(horz, "ctx.lineWidth = " + 2 * animationState.resScale + ";\n");
|
| + var vert = add_canvas_stroke(paths, data, "vertSegment", '"rgb(31,92,192)"');
|
| + add_canvas_style(vert, "ctx.lineWidth = " + 2 * animationState.resScale + ";\n");
|
| + var diag = add_canvas_stroke(paths, data, "diagSegment", '"rgb(127,63,127)"');
|
| + add_canvas_style(diag, "ctx.lineWidth = " + 2 * animationState.resScale + ";\n");
|
| + return data;
|
| +}
|
| +
|
| +function keyframe7(grads, paths) {
|
| + var data = [];
|
| + setup_axes(paths, data);
|
| + add_canvas_text(data, "curve1dDesc1",
|
| + { fillText:"Some curves initially occupy" } );
|
| + add_canvas_text(data, "curve1dDesc2",
|
| + { fillText:"one-dimensional sectors, then diverge.", y:240 } );
|
| + add_canvas_stroke(paths, data, "cubicSegment");
|
| + add_canvas_text(data, "sectorDescXY1",
|
| + { fillText:"X > 0 Y < 0 -Y < X", x:500, y:460, fillStyle:'"rgb(192,63,192)"'} );
|
| + add_canvas_text(data, "sectorDescXY9",
|
| + { fillText:"X > 0 Y == 0", x:500, y:460, fillStyle:'"rgb(192,92,31)"' } );
|
| + var horz = add_canvas_stroke(paths, data, "horzSegment", '"rgb(192,92,31)"');
|
| + add_canvas_style(horz, "ctx.lineWidth = " + 2 * animationState.resScale + ";\n");
|
| + add_canvas_fill(paths, data, "wedgeXY1", "grads.grad4");
|
| + return data;
|
| +}
|
| +
|
| +var canvasData = null;
|
| +
|
| +function CanvasInit(keyframe) {
|
| + canvasData = window[keyframe](grads, paths);
|
| +}
|
| +
|
| +</script>
|
| +
|
| +<script>
|
| +
|
| +function interp(A, B, t) {
|
| + return A + (B - A) * t;
|
| +}
|
| +
|
| +function interp_cubic_coords(x1, x2, x3, x4, t)
|
| +{
|
| + var ab = interp(x1, x2, t);
|
| + var bc = interp(x2, x3, t);
|
| + var cd = interp(x3, x4, t);
|
| + var abc = interp(ab, bc, t);
|
| + var bcd = interp(bc, cd, t);
|
| + var abcd = interp(abc, bcd, t);
|
| + return abcd;
|
| +}
|
| +
|
| +function cubic_partial(value, p) {
|
| + var x1 = p[0], y1 = p[1], x2 = p[2], y2 = p[3];
|
| + var x3 = p[4], y3 = p[5], x4 = p[6], y4 = p[7];
|
| + var t1 = 0, t2 = value;
|
| + var ax = interp_cubic_coords(x1, x2, x3, x4, t1);
|
| + var ay = interp_cubic_coords(y1, y2, y3, y4, t1);
|
| + var ex = interp_cubic_coords(x1, x2, x3, x4, (t1*2+t2)/3);
|
| + var ey = interp_cubic_coords(y1, y2, y3, y4, (t1*2+t2)/3);
|
| + var fx = interp_cubic_coords(x1, x2, x3, x4, (t1+t2*2)/3);
|
| + var fy = interp_cubic_coords(y1, y2, y3, y4, (t1+t2*2)/3);
|
| + var dx = interp_cubic_coords(x1, x2, x3, x4, t2);
|
| + var dy = interp_cubic_coords(y1, y2, y3, y4, t2);
|
| + var mx = ex * 27 - ax * 8 - dx;
|
| + var my = ey * 27 - ay * 8 - dy;
|
| + var nx = fx * 27 - ax - dx * 8;
|
| + var ny = fy * 27 - ay - dy * 8;
|
| + var bx = (mx * 2 - nx) / 18;
|
| + var by = (my * 2 - ny) / 18;
|
| + var cx = (nx * 2 - mx) / 18;
|
| + var cy = (ny * 2 - my) / 18;
|
| + var array = [
|
| + ax, ay, bx, by, cx, cy, dx, dy
|
| + ];
|
| + return array;
|
| +}
|
| +
|
| +function evaluate_at(value, p) {
|
| + var array = [];
|
| + for (var index = 0; index < p.length; ++index) {
|
| + var func = new Function('value', 'return ' + p[index] + ';');
|
| + array[index] = func(value);
|
| + }
|
| + return array;
|
| +}
|
| +
|
| +function interpolate_at(value, p) {
|
| + var array = [];
|
| + var start = p[0];
|
| + var end = p[1];
|
| + assert(typeof end == typeof start);
|
| + switch (typeof start) {
|
| + case 'object':
|
| + for (var index = 0; index < start.length; ++index) {
|
| + array[index] = interp(start[index], end[index], value);
|
| + }
|
| + break;
|
| + case 'number':
|
| + array[index] = interp(start, end, value);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + return array;
|
| +}
|
| +
|
| +function AnimationAddCommon(timing, range, attr, inParams) {
|
| + var animation = {
|
| + timing: timing,
|
| + range: range,
|
| + attr: attr,
|
| + inParams: inParams,
|
| + duration: timing[1] - timing[0],
|
| + remaining: timing[1] - timing[0],
|
| + firstStep: true,
|
| + }
|
| + animationsPending.push(animation);
|
| + return animation;
|
| +}
|
| +
|
| +function AnimationAddSVG(timing, element, range, attr, inParams) {
|
| + var animation = AnimationAddCommon(timing, range, attr, inParams);
|
| + animation.element = element;
|
| + return animation;
|
| +}
|
| +
|
| +function AnimationAddCanvas(timing, element, range, attr, inParams) {
|
| + var animation = AnimationAddCommon(timing, range, attr, inParams);
|
| + animation.element = canvasData[element];
|
| + assert(animation.element);
|
| + animation.firstElement = null;
|
| + return animation;
|
| +}
|
| +
|
| +function AnimationAdd(timing, e, range, attr, funct, inParams) {
|
| + if (!range) {
|
| + range = [0, 1];
|
| + }
|
| + if (!attr) {
|
| + attr = 'opacity';
|
| + }
|
| + if (!funct) {
|
| + funct = interpolate_at;
|
| + }
|
| + var element;
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG':
|
| + element = typeof e == 'string' ? document.getElementById(e) : e;
|
| + break;
|
| + case 'Canvas':
|
| + element = typeof e == 'string' ? e : e.id;
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + assert(element);
|
| + switch (attr) {
|
| + case 'path':
|
| + if (!inParams) {
|
| + inParams = PathDataArray(element);
|
| + }
|
| + break;
|
| + case 'opacity':
|
| + if (!inParams) {
|
| + inParams = [0, 1];
|
| + }
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + var funcBody = 'var outParams = ' + funct.name + '(value, inParams);\n';
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG':
|
| + switch (attr) {
|
| + case 'path':
|
| + var verbArray = PathVerbArray(element);
|
| + funcBody += 'return ';
|
| + for (var index = 0; index < inParams.length; ++index) {
|
| + funcBody += '"' + verbArray[index] + '"';
|
| + funcBody += 'outParams[' + index + '];\n';
|
| + }
|
| + if (verbArray.length > inParams.length) {
|
| + funcBody += '"' + verbArray[verbArray.length - 1] + '"';
|
| + }
|
| + funcBody += ';\n';
|
| + var animation = AnimationAddSVG(timing, element, range, "d", inParams);
|
| + animation.func = new Function('value', 'inParams', funcBody);
|
| + break;
|
| + case 'opacity':
|
| + if (animation.element.getAttribute("stroke-opacity")) {
|
| + animation = AnimationAddSVG(timing, element, range, "stroke-opacity", inParams);
|
| + }
|
| + if (animation.element.getAttribute("fill-opacity")) {
|
| + animation = AnimationAddSVG(timing, element, range, "fill-opacity", inParams);
|
| + }
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + case 'Canvas':
|
| + switch (attr) {
|
| + case 'path':
|
| + var verbArray = PathVerbArray(element);
|
| + for (var index = 0; index < inParams.length; ++index) {
|
| + funcBody += verbArray[index];
|
| + funcBody += 'outParams[' + index + ']';
|
| + }
|
| + if (verbArray.length > inParams.length) {
|
| + funcBody += verbArray[verbArray.length - 1];
|
| + }
|
| + animation = AnimationAddCanvas(timing, element, range, attr, inParams);
|
| + funcBody += animation.element.style + animation.element.draw;
|
| + animation.func = new Function('ctx', 'value', 'inParams', funcBody);
|
| + break;
|
| + case 'opacity':
|
| + animation = AnimationAddCanvas(timing, element, range, attr, inParams);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| + return animation;
|
| +}
|
| +
|
| +function path_data_common(element, getValues) {
|
| + var numRegEx = /-?\d+\.?\d*(?:e-?\d+)?/g;
|
| + var data = [];
|
| + var match;
|
| + var path;
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': path = element.getAttribute("d"); break;
|
| + case 'Canvas': path = paths[element].funcBody; break;
|
| + default: debugger;
|
| + }
|
| + if (getValues) {
|
| + while ((match = numRegEx.exec(path))) {
|
| + data.push(Number(match[0]));
|
| + }
|
| + } else {
|
| + var sIndex = 0;
|
| + while ((match = numRegEx.exec(path))) {
|
| + if (sIndex < match.index) {
|
| + data.push(path.substring(sIndex, match.index));
|
| + }
|
| + sIndex = match.index + match[0].length;
|
| + }
|
| + if (sIndex < path.length) {
|
| + data.push(path.substring(sIndex, path.length));
|
| + }
|
| + }
|
| + return data;
|
| +}
|
| +
|
| +function PathDataArray(element) {
|
| + return path_data_common(element, true);
|
| +}
|
| +
|
| +function PathVerbArray(element) {
|
| + return path_data_common(element, false);
|
| +}
|
| +
|
| +function PathSet(element, funct, value, params) {
|
| + var pathVerbs = PathVerbArray(element);
|
| + if (funct) {
|
| + params = funct(value, params);
|
| + }
|
| + var setValue = '';
|
| + for (var index = 0; index < params.length; ++index) {
|
| + setValue += pathVerbs[index];
|
| + setValue += params[index];
|
| + }
|
| + if (pathVerbs.length > params.length) {
|
| + setValue += pathVerbs[pathVerbs.length - 1];
|
| + }
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG':
|
| + element.setAttribute('d', setValue);
|
| + break;
|
| + case 'Canvas':
|
| + element.func = new Function('ctx', setValue + element.style + element.draw);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| +}
|
| +
|
| +function RemoveFromArray(array, element) {
|
| + for (var index in array) {
|
| + var record = array[index];
|
| + if (record.element == element) {
|
| + array.splice(index, 1);
|
| + break;
|
| + }
|
| + }
|
| +}
|
| +
|
| +function EndAnimationCanvas(animation, visibleFinished) {
|
| + var changeAlpha = "opacity" == animation.attr;
|
| + if (!changeAlpha || animation.range[1] > 0) {
|
| + if (changeAlpha) {
|
| + ctx.save();
|
| + ctx.globalAlpha = animation.range[1];
|
| + }
|
| + if (animation.func) {
|
| + animation.func(ctx, animation.range[animation.range.length - 1], animation.inParams);
|
| + } else {
|
| + animation.element.func(ctx);
|
| + }
|
| + if (changeAlpha) {
|
| + ctx.restore();
|
| + }
|
| +// if (visibleFinished) {
|
| +// visibleFinished.push(animation);
|
| +// }
|
| + } else {
|
| + // if (visibleFinished) {
|
| + // RemoveFromArray(visibleFinished, animation.element);
|
| + // }
|
| + }
|
| +}
|
| +
|
| +/* start here
|
| +canvas:
|
| +
|
| +display list :
|
| + for each element (canvas)
|
| + save
|
| + set global alpha (override)
|
| + create geometry (override)
|
| + create style (override)
|
| + draw
|
| + restore
|
| +
|
| +maybe each action should have an override slot
|
| +animations write to the slot
|
| +each element in display list then iterates overrides once the animations complete the frame
|
| +
|
| +so, first --
|
| + active animations update the display list
|
| +
|
| +next --
|
| + active animations install themselves in override slots
|
| +
|
| +finally
|
| + display list is iterated, calling override slots
|
| +
|
| +----------------
|
| +
|
| +svg:
|
| + display list is implicit
|
| +
|
| + active animations write element attributes
|
| + */
|
| +
|
| +function EndAnimationSVG(animation, visibleFinished) {
|
| + switch (animation.attr) {
|
| + case "opacity":
|
| + animation.element.setAttribute(animation.attribute, animation.range[1]);
|
| + if (animation.range[1] > 0) {
|
| + visibleFinished.push(animation);
|
| + } else {
|
| + RemoveFromArray(visibleFinished, animation.element);
|
| + }
|
| + break;
|
| + case "path":
|
| + var attrStr = animation.func(animation.range[1], animation.inParams);
|
| + animation.element.setAttribute(animation.attribute, attrStr);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| +}
|
| +
|
| +function StepAnimationCanvas(animation, value) {
|
| + var endValue = animation.range[animation.range.length - 1];
|
| + var interp = animation.range[0] + (endValue - animation.range[0]) * (1 - value);
|
| + if (animation.firstStep) {
|
| + RemoveFromArray(visibleFinished, animation.element);
|
| + animation.firstStep = false;
|
| + }
|
| + var changeAlpha = "opacity" == animation.attr;
|
| + if (changeAlpha) {
|
| + ctx.save();
|
| + ctx.globalAlpha = interp;
|
| + }
|
| + if (animation.func) {
|
| + animation.func(ctx, interp, animation.inParams);
|
| + } else {
|
| + animation.element.func(ctx);
|
| + }
|
| + if (changeAlpha) {
|
| + ctx.restore();
|
| + }
|
| +}
|
| +
|
| +function StepAnimationSVG(animation, value) {
|
| + var interp = animation.range[0] + (animation.range[1] - animation.range[0]) * (1 - value);
|
| + switch (animation.attr) {
|
| + case "opacity":
|
| + animation.element.setAttribute(animation.attribute, interp);
|
| + break;
|
| + case "path":
|
| + var attrStr = animation.func(interp, animation.inParams);
|
| + animation.element.setAttribute(animation.attribute, attrStr);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| +}
|
| +
|
| +var animate_frame = 0;
|
| +
|
| +function AnimateList(now) {
|
| + ++animate_frame;
|
| + if (animationState.paused) {
|
| + return;
|
| + }
|
| + if (animationState.start == null) {
|
| + animationState.start = now - animationState.time;
|
| + }
|
| + animationState.time = now - animationState.start;
|
| + var stillPending = [];
|
| + for (var index in animationsPending) {
|
| + var animation = animationsPending[index];
|
| + var interval = animationState.time - animation.timing[0];
|
| + if (interval <= 0) {
|
| + stillPending.push(animation);
|
| + continue;
|
| + }
|
| + animationsActive.push(animation);
|
| + var inList = false;
|
| + for (var dlIndex in displayList) {
|
| + var displayable = displayList[dlIndex];
|
| + if (displayable == animation.element) {
|
| + inList = true;
|
| + break;
|
| + }
|
| + }
|
| + if (!inList) {
|
| + displayList.push(animation.element);
|
| + }
|
| + }
|
| + animationsPending = stillPending;
|
| + var stillAnimating = [];
|
| + if ('Canvas' == animationState.displayEngine) {
|
| + ctx.clearRect(0, 0, canvas.width, canvas.height);
|
| +// for (var index in visibleFinished) {
|
| +// var animation = visibleFinished[index];
|
| +// animation.endAnimation = false;
|
| +// }
|
| + }
|
| + for (var index in animationsActive) {
|
| + var animation = animationsActive[index];
|
| + var interval = animationState.time - animation.timing[0];
|
| + animation.remaining = animation.duration > interval ? animation.duration - interval : 0;
|
| + animation.endAnimation = animation.remaining <= 0;
|
| + if (animation.endAnimation) {
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': EndAnimationSVG(animation, visibleFinished); break;
|
| + case 'Canvas': EndAnimationCanvas(animation, visibleFinished); break;
|
| + default: debugger;
|
| + }
|
| + continue;
|
| + }
|
| + var value = animation.remaining / animation.duration;
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': StepAnimationSVG(animation, value); break;
|
| + case 'Canvas':
|
| + if (!animation.firstElement || !animation.firstElement.endAnimation) {
|
| + StepAnimationCanvas(animation, value);
|
| + }
|
| + break;
|
| + default: debugger;
|
| + }
|
| + stillAnimating.push(animation);
|
| + }
|
| + if ('Canvas' == animationState.displayEngine) {
|
| + for (var index in visibleFinished) {
|
| + var animation = visibleFinished[index];
|
| + if (!animation.endAnimation) {
|
| + EndAnimationCanvas(animation, null);
|
| + }
|
| + }
|
| + }
|
| + animationsActive = stillAnimating;
|
| + if (animationsPending.length || animationsActive.length) {
|
| + animationState.requestID = requestAnimationFrame(AnimateList);
|
| + }
|
| +}
|
| +
|
| +function CancelAnimate(now) {
|
| + if (animationState.start == null) {
|
| + animationState.start = now;
|
| + }
|
| + var time = now - animationState.start;
|
| + var stillAnimating = [];
|
| + for (var index in animationsActive) {
|
| + var animation = animationsActive[index];
|
| + var remaining = animation.remaining - time;
|
| + var value = remaining / animation.duration;
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': animation.element.setAttribute(animation.attribute, value); break;
|
| + case 'Canvas': break;
|
| + }
|
| + if (remaining <= 0) {
|
| + continue;
|
| + }
|
| + stillAnimating.push(animation);
|
| + }
|
| + animationsActive = stillAnimating;
|
| + if (animationsActive.length) {
|
| + animationState.requestID = requestAnimationFrame(CancelAnimate);
|
| + return;
|
| + }
|
| + animationsPending = [];
|
| + animationState.reset();
|
| + if (keyFrameQueue.length > 0) {
|
| + var animationFunc = keyFrameQueue.pop();
|
| + animationFunc();
|
| + }
|
| +}
|
| +
|
| +function CancelAnimation() {
|
| + cancelAnimationFrame(animationState.requestID);
|
| + for (var index in animationsActive) {
|
| + var animation = animationsActive[index];
|
| + switch (animation.attr) {
|
| + case "opacity":
|
| + var tmp = animation.range[0]; animation.range[0] = animation.range[1]; animation[1] = tmp;
|
| + animation.remaining = animation.duration - animation.remaining;
|
| + animation.remaining /= animation.duration / 1000;
|
| + animation.duration = 1000;
|
| + break;
|
| + case "fadeOut":
|
| + RemoveFromArray(visibleFinished, animation.element);
|
| + break;
|
| + case "path":
|
| + break;
|
| + default:
|
| + debugger;
|
| +
|
| + }
|
| + }
|
| + for (var index in visibleFinished) {
|
| + var animation = visibleFinished[index];
|
| + animation.action = "fadeOut";
|
| + animation.remaining = animation.duration = 1000;
|
| + animationsActive.push(animation);
|
| + }
|
| + visibleFinished = [];
|
| + animationState.reset();
|
| + animationState.requestID = requestAnimationFrame(CancelAnimate);
|
| +}
|
| +
|
| +function PauseAnimation() {
|
| + animationState.paused = true;
|
| +}
|
| +
|
| +function QueueAnimation(animationFunc) {
|
| + if (null == animationState.requestID) {
|
| + animationFunc();
|
| + return;
|
| + }
|
| + keyFrameQueue.push(animationFunc);
|
| +}
|
| +
|
| +function UnpauseAnimation() {
|
| + animationState.paused = false;
|
| + animationState.start = performance.now() - animationState.time;
|
| + animationState.requestID = requestAnimationFrame(AnimateList);
|
| +}
|
| +
|
| +function SetupTextSVG(t, x, y) {
|
| + var text;
|
| + if (typeof t == "string") {
|
| + text = document.getElementById(t);
|
| + } else {
|
| + text = t;
|
| + }
|
| + text.setAttribute("font-family", "Helvetica,Arial");
|
| + text.setAttribute("font-size", "1.3rem");
|
| + if (typeof x == 'number') {
|
| + text.setAttribute("x", x);
|
| + } else if (null == text.getAttribute("x")) {
|
| + text.setAttribute("x", 400);
|
| + }
|
| + if (typeof y == 'number') {
|
| + text.setAttribute("y", y);
|
| + } else if (null == text.getAttribute("y")) {
|
| + text.setAttribute("y", 200);
|
| + }
|
| +}
|
| +
|
| +function SetupTextCanvas(t, x, y) {
|
| + var text = typeof t == 'string' ? t : t.id;
|
| + var record = canvasData[text];
|
| + if (typeof x == 'number') {
|
| + record.x = x;
|
| + }
|
| + if (typeof y == 'number') {
|
| + record.y = y;
|
| + }
|
| + record.position = canvas_xy(record);
|
| + record.func = new Function('ctx', record.style + record.draw + record.position);
|
| +}
|
| +
|
| +function SetupText(t, x, y) {
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG':
|
| + SetupTextSVG(t, x, y);
|
| + break;
|
| + case 'Canvas':
|
| + SetupTextCanvas(t, x, y);
|
| + break;
|
| + default:
|
| + debugger;
|
| + }
|
| +}
|
| +
|
| +function FirstText(text) {
|
| + SetupText(text);
|
| + AnimationAdd([0, 1000], text);
|
| +}
|
| +
|
| +
|
| +function EngineInit(keyframe) {
|
| + displayList = [];
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': break;
|
| + case 'Canvas': CanvasInit(keyframe); break;
|
| + default: debugger;
|
| + }
|
| +}
|
| +
|
| +function EngineStart() {
|
| + switch (animationState.displayEngine) {
|
| + case 'SVG': break;
|
| + case 'Canvas':
|
| + // associate fadeIn and fadeOut
|
| + for (var outerIndex in animationsPending) {
|
| + var outer = animationsPending[outerIndex];
|
| + for (var innerIndex in animationsPending) {
|
| + if (outerIndex == innerIndex) {
|
| + continue;
|
| + }
|
| + var inner = animationsPending[innerIndex];
|
| + if (inner.element == outer.element) {
|
| + inner.firstElement = outer;
|
| + continue;
|
| + }
|
| + }
|
| + }
|
| + break;
|
| + default: debugger;
|
| + }
|
| + animationState.reset();
|
| + animationState.requestID = requestAnimationFrame(AnimateList);
|
| +}
|
| +
|
| +function AnimateSpanWedge() {
|
| + EngineInit('keyframe1');
|
| + FirstText(spanWedgeDesc);
|
| + AnimationAdd([1000, 2000], span1);
|
| + AnimationAdd([1500, 3000], wedge1);
|
| + AnimationAdd([3500, 4000], span1, [1, 0]);
|
| + AnimationAdd([3500, 4000], wedge1, [1, 0]);
|
| + AnimationAdd([4000, 5000], span2);
|
| + AnimationAdd([4500, 6000], wedge2);
|
| + AnimationAdd([6500, 7000], span2, [1, 0]);
|
| + AnimationAdd([6500, 7000], wedge2, [1, 0]);
|
| + AnimationAdd([7000, 8000], span3);
|
| + AnimationAdd([7500, 9000], wedge3);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateTrivialWedge() {
|
| + EngineInit('keyframe2');
|
| + FirstText(trivialWedgeDesc1);
|
| + FirstText(trivialWedgeDesc2);
|
| + AnimationAdd([2000, 3500], span4);
|
| + AnimationAdd([2000, 3500], wedge4);
|
| + AnimationAdd([2000, 3500], span5);
|
| + AnimationAdd([2000, 3500], wedge5);
|
| + AnimationAdd([2000, 3500], span6);
|
| + AnimationAdd([2000, 3500], wedge6);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateSectorDesc() {
|
| + EngineInit('keyframe3');
|
| + FirstText(sectorDesc1);
|
| + FirstText(sectorDesc2);
|
| + AnimationAdd([ 0, 1000], xaxis);
|
| + AnimationAdd([ 500, 1500], yaxis);
|
| + AnimationAdd([2000, 3500], sectorDescXYA);
|
| + AnimationAdd([2000, 3500], wedgeXY8);
|
| + AnimationAdd([3000, 4500], sectorDescXYB);
|
| + AnimationAdd([3000, 4500], wedgeXY6);
|
| + AnimationAdd([4000, 5500], sectorDescXYC);
|
| + AnimationAdd([4000, 5500], wedgeXY3);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateLineSingle() {
|
| + EngineInit('keyframe4');
|
| + FirstText(lineSingleDesc);
|
| + for (var i = 1; i <= 8; ++i) {
|
| + SetupText("sectorDescXY" + i, 500, 260);
|
| + }
|
| + AnimationAdd([ 0, 1000], xaxis);
|
| + AnimationAdd([ 0, 1000], yaxis);
|
| + AnimationAdd([1000, 2000], lineSegment);
|
| + AnimationAdd([1000, 3000], lineSegment, [-22.5 * Math.PI / 180], "path", evaluate_at,
|
| + [ circle.center.x, circle.center.y,
|
| + circle.center.x + " + " + circle.radius + " * Math.cos(value)",
|
| + circle.center.y + " + " + circle.radius + " * Math.sin(value)",
|
| + ]);
|
| + AnimationAdd([2000, 3000], sectorDescXY1);
|
| + AnimationAdd([2000, 3000], wedgeXY1);
|
| + AnimationAdd([3000, 7000], lineSegment, [-22.5 * Math.PI / 180, (-22.5 - 360) * Math.PI / 180],
|
| + "path", evaluate_at,
|
| + [ circle.center.x, circle.center.y,
|
| + circle.center.x + " + " + circle.radius + " * Math.cos(value)",
|
| + circle.center.y + " + " + circle.radius + " * Math.sin(value)",
|
| + ]);
|
| + for (var i = 1; i < 8; ++i) {
|
| + AnimationAdd([2500 + 500 * i, 3000 + 500 * i], "sectorDescXY" + (i + 1));
|
| + AnimationAdd([2500 + 500 * i, 3000 + 500 * i], "wedgeXY" + (i + 1));
|
| + AnimationAdd([2500 + 500 * i, 3000 + 500 * i], "sectorDescXY" + i, [1, 0]);
|
| + AnimationAdd([2500 + 500 * i, 3000 + 500 * i], "wedgeXY" + i, [1, 0]);
|
| + }
|
| + AnimationAdd([2500 + 500 * 8, 3000 + 500 * 8], sectorDescXY1);
|
| + AnimationAdd([2500 + 500 * 8, 3000 + 500 * 8], wedgeXY1);
|
| + AnimationAdd([2500 + 500 * 8, 3000 + 500 * 8], sectorDescXY8, [1, 0]);
|
| + AnimationAdd([2500 + 500 * 8, 3000 + 500 * 8], wedgeXY8, [1, 0]);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateCurveMultiple() {
|
| + EngineInit('keyframe5');
|
| + var cubicStart = PathDataArray(curveSegment1);
|
| + var cubicMid = PathDataArray(curveSegment2);
|
| + var cubicEnd = PathDataArray(curveSegment3);
|
| + FirstText(curveMultipleDesc1);
|
| + FirstText(curveMultipleDesc2);
|
| + for (var i = 1; i <= 6; ++i) {
|
| + SetupText("sectorDescXY" + i, 500, 260 + i * 25);
|
| + }
|
| + AnimationAdd([ 0, 1000], xaxis);
|
| + AnimationAdd([ 0, 1000], yaxis);
|
| + AnimationAdd([1000, 2000], curveSegment);
|
| + AnimationAdd([2000, 3000], sectorDescXY1);
|
| + AnimationAdd([2000, 3000], wedgeXY1);
|
| + AnimationAdd([3000, 4000], curveSegment, [0, 1], "path", interpolate_at, [cubicStart, cubicMid]);
|
| + AnimationAdd([4000, 5000], sectorDescXY2);
|
| + AnimationAdd([4000, 5000], wedgeXY2);
|
| + AnimationAdd([5000, 6000], curveSegment, [0, 1], "path", interpolate_at, [cubicMid, cubicEnd]);
|
| + AnimationAdd([6000, 7000], sectorDescXY3);
|
| + AnimationAdd([6000, 7000], wedgeXY3);
|
| + AnimationAdd([6000, 7000], sectorDescXY4);
|
| + AnimationAdd([6000, 7000], wedgeXY4);
|
| + AnimationAdd([6000, 7000], sectorDescXY5);
|
| + AnimationAdd([6000, 7000], wedgeXY5);
|
| + AnimationAdd([6000, 7000], sectorDescXY6);
|
| + AnimationAdd([6000, 7000], wedgeXY6);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateOneDLines() {
|
| + EngineInit('keyframe6');
|
| + FirstText(line1DDest1);
|
| + FirstText(line1DDest2);
|
| + for (var i = 9; i <= 11; ++i) {
|
| + SetupText("sectorDescXY" + i, 500, 260 + (i - 8) * 25);
|
| + }
|
| + AnimationAdd([ 0, 1000], xaxis);
|
| + AnimationAdd([ 0, 1000], yaxis);
|
| + AnimationAdd([2000, 3000], sectorDescXY9);
|
| + AnimationAdd([2000, 3000], horzSegment);
|
| + AnimationAdd([3000, 4000], sectorDescXY10);
|
| + AnimationAdd([3000, 4000], vertSegment);
|
| + AnimationAdd([4000, 5000], sectorDescXY11);
|
| + AnimationAdd([4000, 5000], diagSegment);
|
| + EngineStart();
|
| +}
|
| +
|
| +function AnimateDiverging() {
|
| + EngineInit('keyframe7');
|
| + var cubicData = PathDataArray(cubicSegment2);
|
| + FirstText(curve1dDesc1);
|
| + FirstText(curve1dDesc2);
|
| + SetupText("sectorDescXY9", 500, 285);
|
| + SetupText("sectorDescXY1", 500, 320);
|
| + AnimationAdd([ 0, 1000], xaxis);
|
| + AnimationAdd([ 0, 1000], yaxis);
|
| + AnimationAdd([1900, 1900], cubicSegment);
|
| + AnimationAdd([2000, 3000], cubicSegment, [0, 1], "path", cubic_partial, cubicData);
|
| + AnimationAdd([2000, 3000], sectorDescXY9);
|
| + AnimationAdd([2000, 3000], horzSegment);
|
| + AnimationAdd([3000, 4000], sectorDescXY1);
|
| + AnimationAdd([3000, 4000], wedgeXY1);
|
| + EngineStart();
|
| +}
|
| +
|
| +circle.animate = AnimateCircle;
|
| +circle.start = null;
|
| +
|
| +function AngleToPt(center, radius, degrees) {
|
| + var radians = degrees * Math.PI / 180.0;
|
| + return {
|
| + x: center.x + (radius * Math.cos(radians)),
|
| + y: center.y - (radius * Math.sin(radians))
|
| + };
|
| +}
|
| +
|
| +function PtsToSweep(pt1, pt2, center) { // unused
|
| + return {
|
| + start: 180 / Math.PI * Math.atan2(pt1.y - center.y, pt1.x - center.x),
|
| + end: 180 / Math.PI * Math.atan2(pt2.y - center.y, pt2.x - center.x)
|
| + };
|
| +}
|
| +
|
| +
|
| +function ArcStr(center, radius, startAngle, endAngle) {
|
| + var endPt = AngleToPt(center, radius, endAngle);
|
| + var arcSweep = endAngle - startAngle <= 180 ? "0" : "1";
|
| + return ["A", radius, radius, 0, arcSweep, 0, endPt.x, endPt.y].join(" ");
|
| +}
|
| +
|
| +function ArcStart(center, radius, startAngle, endAngle) {
|
| + var startPt = AngleToPt(center, radius, startAngle);
|
| + return [ startPt.x, startPt.y, ArcStr(center, radius, startAngle, endAngle) ].join(" ");
|
| +}
|
| +
|
| +function MakeArc(arcStart) {
|
| + return "M" + arcStart;
|
| +}
|
| +
|
| +function MakeWedge(center, arcStart) {
|
| + return ["M", center.x, center.y, "L", arcStart, "z"].join(" ");
|
| +}
|
| +
|
| +function Animate(path, now, dur) {
|
| + if (path.start == null) {
|
| + path.start = now;
|
| +// console.log("start=" + now);
|
| + }
|
| + if (now - path.start < dur) {
|
| + requestAnimationFrame(path.animate);
|
| + return true;
|
| + }
|
| + return false;
|
| +}
|
| +
|
| +function AnimateCircle(now) {
|
| + if (circle.start == null) {
|
| + circleFill.setAttribute("fill-opacity", "0.3");
|
| + }
|
| + var dur = 2 * 1000;
|
| + var animating = Animate(circle, now, dur);
|
| +// console.log("now=" + now + "circle.start=" + circle.start )
|
| + var pathStr = ArcStart(circle.center, circle.radius, 0, (now - circle.start) / (dur / 359.9));
|
| +
|
| + circle.setAttribute("d", MakeArc(pathStr));
|
| + circleFill.setAttribute("d", MakeWedge(circle.center, pathStr));
|
| + if (!animating) {
|
| + var delay = dur - (now - circle.start);
|
| + setTimeout(CircleFinal, delay);
|
| + }
|
| +}
|
| +
|
| +function CircleFinal() {
|
| + var firstHalf = ArcStart(circle.center, circle.radius, 0, 180);
|
| + var secondHalf = ArcStr(circle.center, circle.radius, 180, 360);
|
| + circle.setAttribute("d", "M" + firstHalf + secondHalf + "z");
|
| + circleFill.setAttribute("d", "M" + firstHalf + secondHalf + "z");
|
| +}
|
| +
|
| +var svgNS = "http://www.w3.org/2000/svg";
|
| +
|
| +function CreateTextLabels()
|
| +{
|
| + for (var i = 0; i < 32; ++i) {
|
| + var text = document.createElementNS(svgNS, "text");
|
| + var pt = AngleToPt(circle.center, circle.radius + 80, i * 360 / 32);
|
| + text.setAttribute("id", "t" + i);
|
| + text.setAttribute("x", pt.x);
|
| + text.setAttribute("y", pt.y);
|
| + text.setAttribute("text-anchor", "middle");
|
| + text.setAttribute("alignment-baseline", "mathematical");
|
| + var textNode = document.createTextNode(i);
|
| + text.appendChild(textNode);
|
| + document.getElementById("svg").appendChild(text);
|
| + }
|
| +}
|
| +
|
| +// CreateTextLabels();
|
| +
|
| +var keyframeArray = [
|
| + AnimateSpanWedge,
|
| + AnimateTrivialWedge,
|
| + AnimateSectorDesc,
|
| + AnimateLineSingle,
|
| + AnimateCurveMultiple,
|
| + AnimateOneDLines,
|
| + AnimateDiverging,
|
| +];
|
| +
|
| +var keyframeIndex = 3; // keyframeArray.length - 1; // normally 0 ; set to debug a particular frame
|
| +
|
| +function QueueKeyframe() {
|
| + QueueAnimation(keyframeArray[keyframeIndex]);
|
| + if (keyframeIndex < keyframeArray.length - 1) {
|
| + ++keyframeIndex;
|
| + }
|
| +}
|
| +
|
| +var grads;
|
| +var paths;
|
| +var canvas;
|
| +var ctx;
|
| +
|
| +function canvasSetup() {
|
| + canvas = document.getElementById("canvas");
|
| + ctx = canvas ? canvas.getContext("2d") : null;
|
| + assert(ctx);
|
| + var resScale = animationState.resScale = window.devicePixelRatio ? window.devicePixelRatio : 1;
|
| + var unscaledWidth = canvas.width;
|
| + var unscaledHeight = canvas.height;
|
| + canvas.width = unscaledWidth * resScale;
|
| + canvas.height = unscaledHeight * resScale;
|
| + canvas.style.width = unscaledWidth + 'px';
|
| + canvas.style.height = unscaledHeight + 'px';
|
| + if (resScale != 1) {
|
| + ctx.scale(resScale, resScale);
|
| + }
|
| +
|
| + grads = CanvasGrads(ctx);
|
| + paths = CanvasPaths(ctx);
|
| +}
|
| +
|
| +function Onload() {
|
| + canvasSetup();
|
| + var startBtn = document.getElementById('startBtn');
|
| + var stopBtn = document.getElementById('stopBtn');
|
| + var resetBtn = document.getElementById('resetBtn');
|
| +
|
| + startBtn.addEventListener('click', function(e) {
|
| + e.preventDefault();
|
| + e.srcElement.innerText = "Next";
|
| + CancelAnimation();
|
| + QueueKeyframe();
|
| + });
|
| +
|
| + stopBtn.addEventListener('click', function(e) {
|
| + e.preventDefault();
|
| +
|
| + if (!animationState.paused) {
|
| + PauseAnimation();
|
| + e.srcElement.innerText = "Resume";
|
| + } else {
|
| + UnpauseAnimation();
|
| + e.srcElement.innerText = "Pause";
|
| + }
|
| + });
|
| +
|
| + resetBtn.addEventListener('click', function(e) {
|
| + e.preventDefault();
|
| + CancelAnimation();
|
| + keyframeIndex = 0;
|
| + startBtn.innerText = "Start";
|
| + QueueKeyframe();
|
| + });
|
| +}
|
| +
|
| +</script>
|
| +
|
| +</head>
|
| +
|
| +<body onLoad="Onload()">
|
| +
|
| +<div class="controls">
|
| + <button type="button" id="startBtn">Start</button>
|
| + <button type="button" id="stopBtn">Pause</button>
|
| + <button type="button" id="resetBtn">Restart</button>
|
| +</div>
|
| +
|
| +<canvas id="canvas" width="800" height="500" />
|
| +
|
| +</body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 1342523002:
json based animation toy (Closed)
Base URL: https://skia.googlesource.com/skia.git@master