ZZCjas.github.io/function.html at main · ZZCjas/ZZCjas.github.io · GitHub

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<!DOCTYPE html>

<link rel="shortcut icon" href="favicon.png" />

<html>

	<head>
		<meta charset="UTF-8">
		<title>函数图像绘制工具</title>
		<script src="funclmg.js"></script>
		<style>
			#div-img {
				/* 此决定画布的宽高 */
				width: 500px;
				height: 500px;
			}

			#input-controller {
				padding: 10px;
				background-color: azure;
			}
		</style>
	</head>

	<body>
		<div id="input-controller">
			<div id="function">
				<button onclick="Add()">添加函数</button>
				<span id="mod" style="display:none" name="0">
					<input type="color"/>y=
					<input type="text" value="x^3" name="Fun"/>
					<button onclick="Delete(this.parentNode)">Delete</button>
	                <input type="checkbox" onclick="reDraw()" checked="checked"/>Draw Line
				</span>
			</div>

			<div id="option">
				X：<input id="xLeftValue" /> ~
				<input id="xRightValue" />
				<br> Y：
				<input id="yLeftValue" /> ~
				<input id="yRightValue" />
				<br>

				<span id="show-size">Size:</span>
			</div>
			<button onclick="change()">画图</button>
		</div>
		<div id="main">

			<h1>函数图像绘制工具</h1>
			<div id="div-img">
				<canvas id="graph"></canvas>
			</div>
		</div>

	</body>
	<script>
		const FONT_STYLE = "10px 黑体";
		const MIN = 1e-4;
		const MAX = 1e8;
		const EPS = 1e-12;
		const CANVAS = $("graph");
		const CONTEXT_2D = CANVAS.getContext("2d");
		const FUN_IMG_WIDTH = CANVAS.parentNode.clientWidth;
		const FUN_IMG_HEIGHT = CANVAS.parentNode.clientHeight;
		var xLeftValue = -FUN_IMG_WIDTH / 100; // x最左的值
		var xRightValue = FUN_IMG_WIDTH / 100;
		var yLeftValue = -FUN_IMG_HEIGHT / 100;
		var yRightValue = FUN_IMG_HEIGHT / 100;
		var tableX, tableY, countX, countY;
		var funStage = 0,
			mouseX, mouseY;
		var tmp;
	</script>
	<script>
		CANVAS.width = FUN_IMG_WIDTH;
		CANVAS.height = FUN_IMG_HEIGHT;
		$("show-size").innerHTML = "Size：" + FUN_IMG_WIDTH + "*" + FUN_IMG_HEIGHT;

		CANVAS.onmousedown = function(ob) {
			mouseX = ob.layerX;
			mouseY = ob.layerY;
			funStage = 1;
		}
		CANVAS.onmousemove = function(ob) {
			if(funStage != 1) {
				return;
			}
			var NoX, NoY, det;
			NoX = ob.layerX;
			NoY = ob.layerY;
			det = (mouseX - NoX) / FUN_IMG_WIDTH * (xRightValue - xLeftValue);
			xLeftValue += det;
			xRightValue += det;
			det = (NoY - mouseY) / FUN_IMG_HEIGHT * (yRightValue - yLeftValue);
			yLeftValue += det;
			yRightValue += det;
			mouseX = NoX;
			mouseY = NoY;
			reDraw();
			update();
		}
		CANVAS.onmouseup = function(ob) {
			if(funStage == 1) {
				funStage = 0;
				reDraw();
			}
		}
		CANVAS.onmouseleave = function(ob) {
			if(funStage == 1) {
				funStage = 0;
				reDraw();
			}
		}
		CANVAS.onmousewheel = function(ob) {
			// 取消事件的默认动作
			ob.preventDefault();
			// 放大的比例
			var ScaleRate = 0.9;
			var detail;
			if(ob.wheelDelta) {
				detail = ob.wheelDelta;
			} else if(ob.detail) {
				detail = ob.detail;
			}
			if(detail > 0) {
				scale(ob.layerX, FUN_IMG_HEIGHT - 1 - ob.layerY, ScaleRate);
			} else {
				scale(ob.layerX, FUN_IMG_HEIGHT - 1 - ob.layerY, 1 / ScaleRate);
			}
			reDraw();
			update();
		}
		// 初始化
		reDraw();
		update();
		Add();
	</script>
<script src="https://eqcn.ajz.miesnfu.com/wp-content/plugins/wp-3d-pony/live2dw/lib/L2Dwidget.min.js"></script>
<script>
    L2Dwidget.init({
        "model": {
            "jsonPath": "https://unpkg.com/live2d-widget-model-koharu@1.0.5/assets/koharu.model.json",
            "scale": 1
        },
        "display": {
            "position": "left",
            "width": 150,
            "height": 300,
            "hOffset": 0,
            "vOffset": -20
        },
        "mobile": {
            "show": true,
            "scale": 0.5
        },
        "react": {
            "opacityDefault": 0.7,
            "opacityOnHover": 0.2
        }
    });
</script>

<style>

#live2dcanvas
{
    position: fixed;
    bottom: 20px;
    padding-top: 1em;
    width: 10em;
    opacity: 1 !important;
    left: 0;
}

</style>
</html>