WIP adding a options panel to magic page
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js/magic.js
112
js/magic.js
@ -31,6 +31,8 @@ var Magic = function (options) {
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// Average length of new spline (branch)
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this.splineLength = options.splineLength || 15;
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this.paused = false;
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// Save this query here now that the page is loaded
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this.canvas = document.getElementById("magic");
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};
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@ -105,6 +107,10 @@ Magic.prototype.pickRandomColor = function() {
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"b": Math.floor(Math.random() * (255 + 1))};
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};
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Magic.prototype.clear = function() {
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this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
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}
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Magic.prototype.drawSplineSegment = function(branch, context) {
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var ax = (-branch.points[0].x + 3*branch.points[1].x - 3*branch.points[2].x + branch.points[3].x) / 6;
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var ay = (-branch.points[0].y + 3*branch.points[1].y - 3*branch.points[2].y + branch.points[3].y) / 6;
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@ -205,62 +211,64 @@ Magic.prototype.cast = function(x, y, angle, chain) {
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self.canvas.width = dimensions.width;
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}
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// if enough time has passed, cast another spell to draw
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if (timeCounter >= self.waitTime && self.counting) {
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self.cast(undefined, undefined, undefined, chain); // start position
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self.counting = false;
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}
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if (!self.paused) {
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// if enough time has passed, cast another spell to draw
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if (timeCounter >= self.waitTime && self.counting) {
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self.cast(undefined, undefined, undefined, chain); // start position
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self.counting = false;
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}
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// Draw branches
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for (var i in self.spells) {
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context.beginPath();
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context.strokeStyle = self.spells[i].color;
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// Draw branches
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for (var i in self.spells) {
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context.beginPath();
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context.strokeStyle = self.spells[i].color;
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if (self.spells[i].duration > 0) {
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for (var j in self.spells[i].branches) {
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self.drawSplineSegment(self.spells[i].branches[j], context);
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if (self.spells[i].duration > 0) {
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for (var j in self.spells[i].branches) {
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self.drawSplineSegment(self.spells[i].branches[j], context);
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// When finished drawing splines, create a new set of branches
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if (self.spells[i].branches[j].t >= 1) {
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var newBranches = self.splitBranch(self.spells[i].branches[j]);
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// Replace old branch with two new branches
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self.spells[i].branches.splice(j, 1);
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self.spells[i].branches = self.spells[i].branches.concat(newBranches);
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}
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}
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// When finished drawing splines, create a new set of branches
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if (self.spells[i].branches[j].t >= 1) {
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var newBranches = self.splitBranch(self.spells[i].branches[j]);
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// Replace old branch with two new branches
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self.spells[i].branches.splice(j, 1);
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self.spells[i].branches = self.spells[i].branches.concat(newBranches);
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}
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}
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// If over 10 branches, prune the branches
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if (prune) {
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if (sort) {
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while (self.spells[i].branches.length > self.prune_to) {
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self.spells[i].branches.pop();
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}
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} else {
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while (self.spells[i].branches.length > self.prune_to) {
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self.spells[i].branches.splice(
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Math.floor(Math.random() * self.spells[i].branches.length),
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1);
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}
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}
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}
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// If over 10 branches, prune the branches
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if (prune) {
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if (sort) {
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while (self.spells[i].branches.length > self.prune_to) {
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self.spells[i].branches.pop();
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}
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} else {
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while (self.spells[i].branches.length > self.prune_to) {
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self.spells[i].branches.splice(
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Math.floor(Math.random() * self.spells[i].branches.length),
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1);
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}
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}
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}
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context.stroke();
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context.closePath();
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self.spells[i].duration--;
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context.stroke();
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context.closePath();
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self.spells[i].duration--;
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} else {
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// cast a new spell at random position
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if (self.spells[i].chain) {
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self.cast(undefined, undefined, undefined, true);
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}
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self.spells.splice(i, 1); // spell is done now
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}
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}
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if (self.counting) {
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timeCounter++;
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} else {
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// cast a new spell at random position
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if (self.spells[i].chain) {
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self.cast(undefined, undefined, undefined, true);
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}
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self.spells.splice(i, 1); // spell is done now
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}
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}
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if (self.counting) {
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timeCounter++;
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}
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}
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frameId = animationFrame.request(animate);
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}
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@ -290,9 +298,9 @@ Magic.prototype.draw = function() {
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var self = this;
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this.canvas.addEventListener("click", function () { self.canvasClickHandler.apply(self, arguments); });
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var context = this.canvas.getContext("2d");
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this.context = this.canvas.getContext("2d");
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// Cast magic spells
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var frameId = this.drawSpells(context, false, true, true);
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var frameId = this.drawSpells(this.context, false, true, true);
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}
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};
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@ -5,6 +5,94 @@ title: Tyler Hallada
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<script>
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window.onload = function () {
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new Magic({{ site.data.magic | jsonify }}).draw();
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window.magicObj = new Magic({{site.data.magic | jsonify}});
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magicObj.draw();
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document.getElementById("play-pause").addEventListener("click", togglePlay);
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document.getElementById("hide-show").addEventListener("click", togglePanel);
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document.getElementById("clear").addEventListener("click", clear);
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}
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function updateMagic(key, value) {
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magicObj[key] = value;
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}
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function togglePanel(event) {
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var options = document.getElementById("options");
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if (options.style.display === "none") { // hidden
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options.style.display = "block";
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event.target.innerHTML = "Hide";
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} else { // shown
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options.style.display = "none";
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event.target.innerHTML = "Show";
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}
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}
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function togglePlay(event) {
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if (magicObj.paused) {
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magicObj.paused = false;
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event.target.innerHTML = "Pause";
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} else {
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magicObj.paused = true;
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event.target.innerHTML = "Play";
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}
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}
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function clear(event) {
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magicObj.clear();
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}
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</script>
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<div class="options-panel">
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<div class="controls-tab">
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<div class="controls">
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<button id="play-pause">Pause</button>
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<button id="clear">Clear</button>
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<button id="hide-show">Hide</button>
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</div>
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</div>
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<div id="options" class="container-full" style="display:block;">
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<div class="row clearfix">
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<div class="column fourth">
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<form oninput="output.value=speed.value;updateMagic('step', parseFloat(speed.value))">
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<label for="speed">Speed</label>
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<input type="range" min=0.01 max=2 value={{site.data.magic.step}} id="speed" step=0.01>
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<output name="output" for="speed">{{site.data.magic.step}}</output>
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</form>
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</div>
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<div class="column fourth">
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<form oninput="output.value=minDuration.value;updateMagic('minDuration', parseInt(minDuration.value))">
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<label for="minDuration">Min Spell Duration</label>
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<input type="range" min=1 max=1000 value={{site.data.magic.minDuration}} id="minDuration" step=1>
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<output name="output" for="minDuration">{{site.data.magic.minDuration}}</output>
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</form>
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</div>
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<div class="column fourth">
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<form oninput="output.value=maxDuration.value;updateMagic('maxDuration', parseInt(maxDuration.value))">
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<label for="maxDuration">Max Spell Duration</label>
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<input type="range" min=1 max=1000 value={{site.data.magic.maxDuration}} id="maxDuration" step=1>
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<output name="output" for="maxDuration">{{site.data.magic.maxDuration}}</output>
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</form>
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</div>
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<div class="column fourth">
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<form oninput="output.value=splineLength.value;updateMagic('splineLength', parseInt(splineLength.value))">
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<label for="splineLength">Spline Length</label>
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<input type="range" min=1 max=500 value={{site.data.magic.splineLength}} id="splineLength" step=1>
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<output name="output" for="splineLength">{{site.data.magic.splineLength}}</output>
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</form>
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</div>
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</div>
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<div class="row clearfix">
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<div class="column half">
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<form oninput="output.value=minAngleChange.value;updateMagic('minAngleChange', parseInt(minAngleChange.value))">
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<label for="minAngleChange">Min Angle</label>
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<input type="range" min=0 max=360 value={{site.data.magic.minAngleChange}} id="minAngleChange" step=1>
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<output name="output" for="minAngleChange">{{site.data.magic.minAngleChange}}</output>
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</form>
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</div>
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<div class="column half">
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<form oninput="output.value=maxAngleChange.value;updateMagic('maxAngleChange', parseInt(maxAngleChange.value))">
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<label for="maxAngleChange">Max Angle</label>
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<input type="range" min=0 max=360 value={{site.data.magic.maxAngleChange}} id="maxAngleChange" step=1>
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<output name="output" for="maxAngleChange">{{site.data.magic.maxAngleChange}}</output>
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</form>
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</div>
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</div>
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