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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>绘制立方体</title>
<style>
html, body {
width: 100%;
height: 100%;
padding: 0;
margin: 0;
background: #f1f1f1;
}
canvas {
display: block;
}
</style>
<script src="drawCube.js"></script>
</head>
<body>
<canvas width="800" height="300" id="canvas"></canvas>
<img src="assets/left.png" alt="" id="left">
<img src="assets/right.png" alt="" id="right">
<img src="assets/top.png" alt="" id="top">
</body>
</html>
<script>
window.onload = function() {
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
// 正常高度
var cube = drawCube(100, 100, "#0E2137");
ctx.drawImage(cube, 20, 20);
var cube = drawCube(100, 100, "#7A0004");
ctx.drawImage(cube, 140, 20);
var left = document.getElementById("left");
var right = document.getElementById("right");
var top = document.getElementById("top");
var cube = drawCube(100, 100, {left: left, right: right, top: top});
ctx.drawImage(cube, 260, 20);
// 一半高度
var cube = drawCube(100, 50, "#0E2137");
ctx.drawImage(cube, 20, 140);
var cube = drawCube(100, 50, "#7A0004");
ctx.drawImage(cube, 140, 140);
var left = document.getElementById("left");
var right = document.getElementById("right");
var top = document.getElementById("top");
var cube = drawCube(100, 50, {left: left, right: right, top: top});
ctx.drawImage(cube, 260, 140);
// 参数错误
var cube = drawCube(100, 50, "#0");
ctx.drawImage(cube, 20, 140);
var cube = drawCube(100, 50, {left: 1});
ctx.drawImage(cube, 140, 140);
}
</script>