2023-02-14 06:21:19 +00:00
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<!DOCTYPE html>
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<html>
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<head>
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<title>Target scaler</title>
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<style>
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body {
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max-width: 70em;
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}
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input {
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margin-left: 1em;
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}
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.complex-radio {
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display: inline-block;
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text-align: center;
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vertical-align: top;
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}
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.complex-radio img {
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width: 10em;
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}
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#print {
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width: 100%;
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}
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#print .target {
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display: block;
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margin-left: auto;
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margin-right: auto;
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}
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@media screen {
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#print {
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display: none;
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}
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}
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@media print {
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#ui {
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display: none;
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}
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}
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</style>
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</head>
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<body>
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<div id="ui">
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<h1>Dry Fire Target Maker</h1>
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<p>
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2023-02-14 06:33:28 +00:00
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Scale the target by setting the simulated and actual distances to the target in any unit of length,
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then click <em>Print</em>.
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</p>
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<p>
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For example, if you want the target to appear as if it is 15m away when it is actually
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only 3m away, set <em>Simulated distance</em> to 15 and <em>Actual distance</em>
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2023-02-14 06:21:19 +00:00
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to 3.
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</p>
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2023-02-14 06:33:28 +00:00
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<p>
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The target <strong>will not</strong> fit on US letter paper if <em>Actual distance</em> is more than ~35% of <em>Simulated distance</em>.
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</p>
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<hr>
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2023-02-14 06:21:19 +00:00
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<p>
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<label>Simulated distance<input id="simulated-range" type="number" value="40"></label>
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</p>
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<p>
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<label>Actual distance<input id="actual-range" type="number" value="3"></label>
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</p>
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<fieldset role="radiogroup" id="target-styles">
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<legend>Target style</legend>
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<label><input type="radio" name="target-style" checked>
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<div class="complex-radio">
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<div>USPSA</div><img class="target" src="uspsa.svg">
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</div>
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</label>
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<label><input type="radio" name="target-style">
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<div class="complex-radio">
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<div>IDPA</div><img class="target" src="idpa.svg">
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</div>
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</label>
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<label><input type="radio" name="target-style">
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<div class="complex-radio">
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<div>IPSC</div><img class="target" src="ipsc.svg">
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</div>
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</label>
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</fieldset>
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<p>
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<button id="print-button">Print</button>
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</p>
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</div>
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<div id="print">
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<img class="target">
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</div>
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<script>
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{
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let target = document.querySelector("#print .target");
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let simulatedRange = document.getElementById("simulated-range");
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let actualRange = document.getElementById("actual-range");
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const updateScale = () => {
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let scale = actualRange.value / simulatedRange.value;
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target.style.width = target.naturalWidth * scale + "mm";
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}
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simulatedRange.addEventListener("change", updateScale);
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actualRange.addEventListener("change", updateScale);
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target.addEventListener("load", updateScale);
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document.getElementById("print-button").addEventListener("click", print.bind(window));
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const updateTargetStyle = () => {
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const checked = document.querySelector("#target-styles input[type=radio]:checked");
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const src = checked.labels[0].getElementsByTagName("img")[0].src;
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target.src = src;
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};
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document.querySelectorAll("#target-styles label").forEach((label) => {
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label.addEventListener("change", updateTargetStyle);
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});
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updateTargetStyle();
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}
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</script>
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</body>
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</html>
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