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219 lines
6.8 KiB
JavaScript
219 lines
6.8 KiB
JavaScript
(function() {
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"use strict";
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// DISCLAIMER: I just started learning d3, so this is certainly not good
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// idiomatic d3 code. But hey, it works (kinda).
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var tweens = {
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'out': function(f) { return function(s) { return 1-f(1-s) } },
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'chain': function(f1, f2) { return function(s) { return ((s<.5) ? f1(2*s) : 1+f2(2*s-1)) * .5 } },
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'linear': function(s) { return s },
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'quad': function(s) { return s*s },
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'cubic': function(s) { return s*s*s },
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'quart': function(s) { return s*s*s*s },
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'quint': function(s) { return s*s*s*s*s },
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'sine': function(s) { return 1 - Math.cos(s*Math.PI/2) },
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'expo': function(s) { return Math.pow(2, 10*(s-1)) },
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'circ': function(s) { return 1 - Math.sqrt(Math.max(0,1-s*s)) },
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'back': function(s) { var b = 1.70158; return s*s*((b+1)*s - b) },
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'bounce': function(s) {
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return Math.min(
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7.5625 * Math.pow(s, 2),
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7.5625 * Math.pow((s - .545455), 2) + .75,
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7.5625 * Math.pow((s - .818182), 2) + .90375,
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7.5625 * Math.pow((s - .954546), 2) + .984375)
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},
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'elastic': function(s) {
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return -Math.sin(2/0.3 * Math.PI * (s-1) - Math.asin(1)) * Math.pow(2, 10*(s-1))
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},
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};
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var tweenfunc = tweens.linear;
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var width_graph = 320,
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width_anim_move = 110,
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width_anim_rotate = 110,
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width_anim_size = 110,
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height = 250;
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// "UI"
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var graph_ui = d3.select("#tween-graph").append("div")
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.attr("id", "tween-graph-ui");
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// rest see below
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// the graph
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var graph = d3.select("#tween-graph").append("svg")
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.attr("width", width_graph).attr("height", height);
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// background
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graph.append("rect")
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.attr("width", "100%").attr("height", "100%")
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.attr("style", "fill:rgb(240,240,240);stroke-width:1;stroke:rgb(100,100,100);");
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var y_zero = height * .78, y_one = height * .22;
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graph.append("rect")
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.attr("y", y_one)
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.attr("width", "100%").attr("height", y_zero - y_one)
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.attr("style", "fill:steelblue;fill-opacity:.3;stroke-width:1;stroke:rgba(100,100,100,.7)");
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// time arrow
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graph.append("defs")
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.append("marker")
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.attr("id", "triangle")
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.attr("viewBox", "0 0 10 10")
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.attr("refX", 1).attr("refY", 5)
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.attr("markerWidth", 4)
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.attr("markerHeight", 4)
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.attr("orient", "auto")
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.attr("style", "fill:rgba(0,0,0,.5)")
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.append("path").attr("d", "M 0 0 L 10 5 L 0 10 z");
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graph.append("line")
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.attr("x1", width_graph/2-80)
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.attr("x2", width_graph/2+80)
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.attr("y1", y_zero + 40).attr("y2", y_zero + 40)
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.attr("style", "stroke-width:2;stroke:rgba(0,0,0,.5)")
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.attr("marker-end", "url(#triangle)");
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graph.append("text")
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.text("Time")
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.attr("x", width_graph/2).attr("y", y_zero + 55)
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.attr("style", "text-anchor:middle;fill:rgba(0,0,0,.5);font-size:15px");
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// the actual graph
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var curve = d3.svg.line()
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.x(function(x) { return x*width_graph; })
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.y(function(x) { return tweenfunc(x) * (y_one - y_zero) + y_zero; })
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var graph_curve = graph.append("path").attr("d", curve(d3.range(0,1.05,.005)))
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.attr("style", "fill:none;stroke-width:2;stroke:seagreen;");
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var graph_marker = graph.append("circle")
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.attr("r", 5)
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.attr("style", "stroke:goldenrod;fill:none;stroke-width:3");
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// finally, a label
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var graph_label = graph.append("text")
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.text("linear")
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.attr("x", width_graph/2).attr("y", 20)
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.attr("style", "text-anchor:middle;font-weight:bold;font-size:15px;");
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// animation examples - moving ball
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var anim_move = d3.select("#tween-graph").append("svg")
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.attr("width", width_anim_move).attr("height", height);
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anim_move.append("rect")
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.attr("width", "100%").attr("height", "100%")
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.attr("style", "fill:rgb(240,240,240);stroke-width:1;stroke:rgb(100,100,100);");
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anim_move.append("rect")
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.attr("width", 10).attr("height", (y_zero - y_one))
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.attr("x", width_anim_move/2-5).attr("y", y_one)
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.attr("style", "fill:black;opacity:.1");
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var anim_move_ball = anim_move.append("circle")
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.attr("cx", width_anim_move/2).attr("cy", y_one)
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.attr("r", 17)
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.attr("style", "fill:steelblue;stroke:rgb(90,90,90);stroke-width:5;");
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// animation examples - rotating square
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var anim_rotate = d3.select("#tween-graph").append("svg")
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.attr("width", width_anim_size).attr("height", height);
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anim_rotate.append("rect")
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.attr("width", "100%").attr("height", "100%")
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.attr("style", "fill:rgb(240,240,240);stroke-width:1;stroke:rgb(100,100,100);");
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var w = width_anim_size/2;
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var anim_rotate_square = anim_rotate.append("rect")
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.attr("x", -w/2).attr("y", -w/4)
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.attr("width", w).attr("height", w/2)
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.attr("style", "fill:steelblue;stroke:rgb(90,90,90);stroke-width:5;");
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// animation examples - resizing ellipse
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var anim_size = d3.select("#tween-graph").append("svg")
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.attr("width", width_anim_size).attr("height", height);
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anim_size.append("rect")
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.attr("width", "100%").attr("height", "100%")
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.attr("style", "fill:rgb(240,240,240);stroke-width:1;stroke:rgb(100,100,100);");
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anim_size.append("ellipse")
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.attr("cx", width_anim_size/2).attr("cy", height/2)
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.attr("rx", 40).attr("ry", 120)
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.attr("style", "fill:rgb(150,150,150);stroke:black;stroke-width:2;opacity:.1");
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var anim_size_ellipse = anim_size.append("ellipse")
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.attr("cx", width_anim_size/2).attr("cy", height/2)
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.attr("rx", 40).attr("ry", 40)
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.attr("style", "fill:steelblue;stroke:rgb(90,90,90);stroke-width:5;");
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// make it move!
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var t = 0;
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window.setInterval(function() {
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t = (t + .025 / 3);
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if (t > 1.3) { t = -.3; }
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var tt = Math.max(Math.min(t, 1), 0);
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var s = tweenfunc(tt)
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var yy = s * (y_one - y_zero) + y_zero;
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var translate = "translate("+(width_anim_size/2)+" "+(height/2)+")";
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var rotate = "rotate(" + (s * 360) + ")";
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graph_marker.attr("cx", tt*width_graph).attr("cy", yy);
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anim_move_ball.attr("cy", y_one + y_zero - yy);
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anim_rotate_square.attr("transform", translate + " " + rotate);
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anim_size_ellipse.attr("ry", s * 80 + 40);
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}, 25);
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// ui continued
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graph_ui.append("strong").text("Function: ");
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var select_modifier = graph_ui.append("select");
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select_modifier.append("option").text("in");
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select_modifier.append("option").text("out");
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select_modifier.append("option").text("in-out");
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select_modifier.append("option").text("out-in");
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graph_ui.append("strong").text("-")
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var select_func = graph_ui.append("select")
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var funcs = [];
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for (var k in tweens)
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{
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if (k != "out" && k != "chain")
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{
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select_func.append("option").text(k);
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funcs.push(k);
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}
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}
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var change_tweenfunc = function()
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{
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var fname = funcs[select_func.node().selectedIndex];
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var mod = select_modifier.node().selectedIndex;
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tweenfunc = tweens[fname];
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if (mod == 1) // out
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tweenfunc = tweens.out(tweenfunc);
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else if (mod == 2) // in-out
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tweenfunc = tweens.chain(tweenfunc, tweens.out(tweenfunc));
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else if (mod == 3) // out-in
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tweenfunc = tweens.chain(tweens.out(tweenfunc), tweenfunc);
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// update curve
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graph_curve.attr("d", curve(d3.range(0,1.05,.005)))
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// update label
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if (mod != 0)
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graph_label.text((['in','out','in-out','out-in'])[mod] + "-" + fname);
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else
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graph_label.text(fname);
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}
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select_func.on("change", change_tweenfunc);
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select_modifier.on("change", change_tweenfunc);
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})();
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