css 使用鼠标拖动进行 3d 变换旋转 (x + y)

Question

我最近 div 进入了 css 变换的世界，想要旋转 div（x 和 y 轴），我可以用 2 个滑块来完成范围为 0 到 360 度，但现在期待通过拖动鼠标来完成，我在寻找修复它的建议方面做出了非常草率的努力：

"use strict";

let elContainer = $('#container');
let elBox = $('#box');

$(document).ready(function() {
  $('.slider-rotate').on('input', function() {
    sliderRotate();
  });

  elContainer.mousedown(function(e) {
    initDragRotate(e);
  });

  elContainer.mousemove(function(e) {
    dragRotate(e);
  });

  elContainer.mouseup(function(e) {
    endDragRotate();
  });

});

let dragging = false;
let delta = {};

function initDragRotate(e) {
  dragging = true;
  delta = {
    x: e.pageX,
    y: e.pageY,
  };
}

function dragRotate(e) {
  if (!dragging) {
    return;
  }

  delta.x = e.pageX - delta.x;
  delta.y = e.pageY - delta.y;

  let rotateParam = '';
  rotateParam += ' rotate' + 'Y' + '(' + delta.x + 'deg)';
  rotateParam += ' rotate' + 'X' + '(' + delta.y + 'deg)';
  elBox.css('transform', rotateParam);
}

function endDragRotate() {
  if (!dragging) {
    return;
  }

  dragging = false;
}


function sliderRotate() {
  let rotateParam = '';
  $('.slider-rotate').each(function() {
    rotateParam += ' ' + getRotateParamString($(this));
  });
  elBox.css('transform', rotateParam);
}

function getRotateParamString(elClass) {
  let val = elClass.val();
  let rotateType = elClass.data('rotateType');
  let rotateParam = 'rotate' + rotateType + '(' + val + 'deg)';

  return rotateParam;
}

#container {
  background: #ccc;
  padding: 10vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#box {
  width: 30vh;
  height: 30vh;
  border: 5px solid #000;
  position: relative;
  transform-style: preserve-3d;
}

#box>div {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="container">
  <div id="box">
    <div style="background: #f00;"></div>
    <div style="background: #0f0;"></div>
  </div>
</div>

<div id="control">
  <br>
  <label>
    x
    <input type="range" class="slider-rotate" data-rotate-type="X" min="0" max="360" value="0">
  </label>
  <br>
  <label>
    y
    <input type="range" class="slider-rotate" data-rotate-type="Y" min="0" max="360" value="0">
  </label>
</div>

此外，在顶部和底部（绿色和红色）有 2 个 div 具有变换样式的 preserve-3d 属性，希望它在翻转时显示另一种颜色，但没有运气！请推荐，谢谢！

Answer 1

旋转多少的计算有点奇怪。

我相信您需要的是让旋转量取决于鼠标在屏幕上和屏幕下方的放置量。要使其与屏幕尺寸成比例，您需要将其除以屏幕尺寸，然后乘以 360 以获得从 pageX/Y 为 0 到屏幕的 right/bottom 的完整范围。

"use strict";

let elContainer = $('#container');
let elBox = $('#box');

$(document).ready(function() {
  $('.slider-rotate').on('input', function() {
    sliderRotate();
  });

  elContainer.mousedown(function(e) {
    initDragRotate(e);
  });

  elContainer.mousemove(function(e) {
    dragRotate(e);
  });

  elContainer.mouseup(function(e) {
    endDragRotate();
  });

});

let dragging = false;
let delta = {};

function initDragRotate(e) {
  dragging = true;
  delta = {
    x: e.pageX,
    y: e.pageY,
  };
}

function dragRotate(e) {
  if (!dragging) {
    return;
  }
  // THIS IS THE CALCULATION THAT HAS CHANGED
  delta.x = e.pageX / window.innerWidth * 360; //- delta.x;
  delta.y = e.pageY / window.innerHeight * 360; // - delta.y;

  let rotateParam = '';
  rotateParam += ' rotate' + 'Y' + '(' + delta.x + 'deg)';
  rotateParam += ' rotate' + 'X' + '(' + delta.y + 'deg)';
  elBox.css('transform', rotateParam);
}

function endDragRotate() {
  if (!dragging) {
    return;
  }

  dragging = false;
}


function sliderRotate() {
  let rotateParam = '';
  $('.slider-rotate').each(function() {
    rotateParam += ' ' + getRotateParamString($(this));
  });
  elBox.css('transform', rotateParam);
}

function getRotateParamString(elClass) {
  let val = elClass.val();
  let rotateType = elClass.data('rotateType');
  let rotateParam = 'rotate' + rotateType + '(' + val + 'deg)';

  return rotateParam;
}

#container {
  background: #ccc;
  padding: 10vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#box {
  width: 30vh;
  height: 30vh;
  border: 5px solid #000;
  position: relative;
  transform-style: preserve-3d;
}

#box>div {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="container">
  <div id="box">
    <div style="background: #f00;"></div>
    <div style="background: #0f0;"></div>
  </div>
</div>

<div id="control">
  <br>
  <label>
    x
    <input type="range" class="slider-rotate" data-rotate-type="X" min="0" max="360" value="0">
  </label>
  <br>
  <label>
    y
    <input type="range" class="slider-rotate" data-rotate-type="Y" min="0" max="360" value="0">
  </label>
</div>

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