https://gezeqi.github.io/cn/tags/pointcloud/ Recent content in Pointcloud on 我的网站 Hugo -- gohugo.io cn Sun, 20 Jul 2025 16:21:26 +0200 https://gezeqi.github.io/cn/blogs/blender_pointcloud/ Sun, 20 Jul 2025 16:21:26 +0200 https://gezeqi.github.io/cn/blogs/blender_pointcloud/ <h2 id="打开blender">打开Blender</h2> <ol> <li>打开Blender：打开后界面如下所示。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105111111745.png" alt="image-20251105111111745"></p> <ol start="2"> <li>隐藏欢迎弹窗：按<code>ESC</code>键或任意单击弹窗外侧。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105111134383.png" alt="image-20251105111134383"></p> <h2 id="导入线框模型">导入线框模型</h2> <p>注：此处直接使用默认模型，自定义时应按照下述步骤删除默认模型后导入实际模型。</p> <ol> <li>删除默认模型：选中模型（选中后边缘为橙色），按<code>X</code>键弹出窗口后确认删除。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105111257420.png" alt="image-20251105111257420"></p> <ol start="2"> <li>导入实际模型：<code>文件</code>&mdash;&gt;<code>导入</code>&mdash;&gt;<code>Wavefront(.obj)</code>，选择要导入的模型（一般以obj文件）。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105111341151.png" alt="image-20251105111341151"></p> <h2 id="创建几何节点">创建几何节点</h2> <ol> <li>打开<code>修改器</code>：确保选中当前模型，在右侧下方面板点击<code>修改器</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105112029999.png" alt="image-20251105112029999"></p> <ol start="2"> <li>添加<code>几何节点修改器</code>：<code>添加修改器</code>&mdash;&gt;<code>几何节点</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105112128134.png" alt="image-20251105112128134"></p> <ol start="3"> <li>切换到<code>几何节点</code>窗口。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105112313636.png" alt="image-20251105112313636"></p> <ol start="4"> <li>新建几何节点：点击<code>新建</code>（两处随便点击一处即可）。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105112420539.png" alt="image-20251105112420539"></p> <h3 id="方法一">方法一</h3> <p><code>Shift+A</code>：<code>网格</code>&mdash;&gt;<code>操作</code>&mdash;&gt;<code>网格转换为点</code></p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105125339323.png" alt="image-20251105125339323"></p> <p>将<code>网格转换为点</code>节点置于<code>组输入</code>与<code>组输出</code>之间，它将自动连接起来，此时导入模型变为顶点集。</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105125545868.png" alt="image-20251105125545868"></p> <p>注：方法一所生成的点，其形状为类似菱形。因此更多时候可以选择方法二生成自定义形状的点。</p> <h3 id="方法二">方法二</h3> <p><code>Shift+A</code>：<code>实例</code>&mdash;&gt;<code>实例化于点上</code></p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105130017150.png" alt="image-20251105130017150"></p> <p>将<code>实例化于点上</code>节点置于<code>组输入</code>与<code>组输出</code>之间，它将自动连接起来，此时导入模型将消失。</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105130059385.png" alt="image-20251105130059385"></p> <p>复制粘贴进来自定义的物体</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105130811966.png" alt="image-20251105130811966"></p> <p><code>Shift+A</code>：<code>输入</code>&mdash;&gt;<code>场景</code>&mdash;&gt;<code>物体信息</code></p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105130921097.png" alt="image-20251105130921097"></p> <p>调整<code>物体信息</code>节点：首先选择导入的实例，并将<code>物体信息</code>节点的<code>几何数据</code>连接到<code>实例化于点上</code>节点的<code>实例</code>，则所有顶点均显示为实例的模样。</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105131218148.png" alt="image-20251105131218148"></p> <p>点击显示按钮和渲染按钮以隐藏导入的实例，使得其不被显示和渲染。</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105133543114.png" alt="image-20251105133543114"></p> <p>注：如果对实例的大小有要求，可以通过<code>实例化于点上</code>节点的<code>旋转</code>与<code>缩放</code>进行调整。</p> <h2 id="材质">材质</h2> <ol> <li>打开<code>材质</code>：在右侧下方面板点击<code>材质</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105131642210.png" alt="image-20251105131642210"></p> <ol start="2"> <li>调整<code>基础色</code>：点击<code>基础色</code>靠右侧的颜色区域，在弹出窗口中选择特定颜色。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105131722832.png" alt="image-20251105131722832"></p> <ol start="3"> <li>切换到<code>渲染模式</code>：按住<code>Z</code>键，通过移动鼠标<code>渲染模式</code>并点击左键切换。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105131816828.png" alt="image-20251105131816828"></p> <ol start="4"> <li>添加<code>材质</code>：<code>Shift+A</code>&mdash;&gt;<code>材质</code>&mdash;&gt;<code>设置材质</code></li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105131923876.png" alt="image-20251105131923876"></p> <p>将<code>设置材质</code>节点添加到<code>实例化于点上</code>节点与<code>组输出</code>的中间，并选择指定的材质，则所有顶点均显示为对应材质。</p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132054305.png" alt="image-20251105132054305"></p> <p>注：如果对顶点的颜色不满意，可以在<code>渲染模式</code>下继续调整<code>基础色</code>。</p> <h2 id="调整世界环境">调整世界环境</h2> <ol> <li>打开<code>世界环境</code>：在右侧下方面板点击<code>世界环境</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132400767.png" alt="image-20251105132400767"></p> <ol start="2"> <li>调整<code>颜色</code>：点击<code>颜色</code>靠右侧的颜色区域，在弹出窗口中选择特定颜色。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132450620.png" alt="image-20251105132450620"></p> <ol start="3"> <li>为确保渲染效果，应该将背景调整为尽可能纯白，效果如下所示。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132529672.png" alt="image-20251105132529672"></p> <h2 id="调整渲染">调整渲染</h2> <ol> <li>打开<code>渲染</code>：在右侧下方面板点击<code>渲染</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132551412.png" alt="image-20251105132551412"></p> <ol start="2"> <li>调整<code>胶底</code>为<code>透明</code>：找到<code>胶底</code>，勾选<code>透明</code>，勾选后将会立刻改变其背景。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132643758.png" alt="image-20251105132643758"></p> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132711385.png" alt="image-20251105132711385"></p> <ol start="3"> <li>调整<code>渲染引擎</code>：将<code>EEVEE</code>更改为<code>Cycles</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132732974.png" alt="image-20251105132732974"></p> <h2 id="导出点云图">导出点云图</h2> <ol> <li>渲染图像：直接按<code>F12</code>键或者点击<code>渲染</code>&mdash;&gt;<code>渲染图像</code>。</li> </ol> <p><img src="https://cdn.jsdelivr.net/gh/gezeqi/Pictures@master/uPic/image-20251105132900734.png" alt="image-20251105132900734"></p>