最近研究了下用pcl读取点云数据，又做了个C#的dll，方便读取，同样这个dll基于pcl 最新版本1.13.1版本开发。

        上次做的需要先得到点云长度，再获取数据。这次这个定义了一个PointCloudXYZ类来存数据。将下面的dll拷贝到可执行目录下，引用Q_PclSharp.dll使用

Dll下载链接

链接：https://pan.baidu.com/s/1H7ig8YXJDTscprVDydjuJA 
提取码：6xha

具体使用方法

 1. 引用Q_PclSharp.dll 并使用命名空间 using Q_PclSharp;

2. PointCloudXYZ cloudXYZ = new PointCloudXYZ();

3.  IO.loadPlyFile(filePath, cloud.PointCloudXYZPointer);

装个VTK，把读到的数据显示出来

测试效果

 测试代码

using Kitware.VTK;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Q_PclSharp;namespace TestCSdll
{public partial class Form1 : Form{PointCloudXYZ cloud = new PointCloudXYZ();public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){OpenFileDialog ofd = new OpenFileDialog();if (ofd.ShowDialog() == DialogResult.OK){                               cloud.Clear();IO.loadPlyFile(ofd.FileName, cloud.PointCloudXYZPointer);vtkPoints points = vtkPoints.New();for (int i = 0; i < cloud.Size; i++){points.InsertNextPoint(cloud.GetX(i), cloud.GetY(i), cloud.GetZ(i));}vtkUnsignedCharArray colors_rgb = GetRGB(cloud);vtkPolyData polydata = vtkPolyData.New();polydata.SetPoints(points);polydata.GetPointData().SetScalars(colors_rgb);vtkVertexGlyphFilter glyphFilter = vtkVertexGlyphFilter.New();glyphFilter.SetInputConnection(polydata.GetProducerPort());vtkPolyDataMapper mapper = vtkPolyDataMapper.New();mapper.SetInputConnection(glyphFilter.GetOutputPort());vtkActor actor = vtkActor.New();actor.SetMapper(mapper);vtkRenderer render = renderWindowControl1.RenderWindow.GetRenderers().GetFirstRenderer();for (int i = 0; i < render.GetActors().GetNumberOfItems(); i++){var item = render.GetActors().GetItemAsObject(i);render.RemoveActor((vtkActor)item);item.Dispose();}render.AddActor(actor);render.ResetCamera();this.Refresh();}}vtkUnsignedCharArray GetRGB(PointCloudXYZ cloud){vtkUnsignedCharArray colors_rgb = vtkUnsignedCharArray.New();double[] minmax = new double[6];cloud.GetMinMaxXYZ(minmax);double z = minmax[5] - minmax[4];double z_median = z / 2;colors_rgb.SetNumberOfComponents(3);double r = 0, g = 0, b = 0;for (int i = 0; i < cloud.Size; i++){               if ((cloud.GetZ(i) - minmax[4]) > z_median){                   r = (255 * ((cloud.GetZ(i) - minmax[4] - z_median) / z_median)); ;g = (255 * (1 - ((cloud.GetZ(i) - minmax[4] - z_median) / z_median)));b = 0;colors_rgb.InsertNextTuple3(r, g, b);}else{r = 0;g = (255 * ((cloud.GetZ(i) - minmax[4]) / z_median));b = (255 * (1 - ((cloud.GetZ(i) - minmax[4]) / z_median)));colors_rgb.InsertNextTuple3(r, g, b);}}return colors_rgb;}}
}