vtk+C++利用鼠标交互画线
在计算机图形学领域，利用鼠标交互进行绘图是一种常见的用户界面设计。VTK（Visualization Toolkit）是开源的C++库，专门用于三维图形渲染和可视化。在这个场景中，我们将探讨如何利用VTK和C++来实现一个简单的功能：通过鼠标交互来画线。
我们需要了解VTK的基本架构。VTK包含了一系列的类，如Renderer、RenderWindow和RenderWindowInteractor，它们分别负责渲染、显示窗口和处理用户交互。在我们的案例中，主要关注RenderWindowInteractor，它是与用户交互的核心部分。
1. **RenderWindowInteractor重写**：
我们需要继承VTK的`vtkRenderWindowInteractor`类，并重写其事件处理函数，以便响应鼠标的点击和移动事件。VTK中，这些事件通常通过`AddObserver`方法添加监听器，例如：
```cpp
interactor->AddObserver(vtkCommand::LeftButtonPressEvent, this, &MyInteractorClass::OnLeftButtonDown);
interactor->AddObserver(vtkCommand::LeftButtonReleaseEvent, this, &MyInteractorClass::OnLeftButtonUp);
interactor->AddObserver(vtkCommand::MouseMoveEvent, this, &MyInteractorClass::OnMouseMove);
```
2. **鼠标事件处理**：
- `OnLeftButtonDown`：当鼠标左键按下时，记录当前鼠标位置作为线条的起点。
- `OnLeftButtonUp`：当鼠标左键释放时，记录当前鼠标位置作为线条的终点，创建并添加线条到渲染器中。
- `OnMouseMove`：在鼠标移动过程中，如果左键按住，更新线条的终点并刷新渲染。
3. **线条绘制**：
使用VTK的`vtkLineSource`类生成线段，然后用`vtkPolyDataMapper`将几何数据映射为可渲染的模式，接着用`vtkActor`将映射后的数据添加到渲染器中。例如：
```cpp
vtkSmartPointer lineSource = vtkSmartPointer::New();
lineSource->SetPoint1(startPoint);
lineSource->SetPoint2(endPoint);
lineSource->Update();
vtkSmartPointer mapper = vtkSmartPointer::New();
mapper->SetInputConnection(lineSource->GetOutputPort());
vtkSmartPointer actor = vtkSmartPointer::New();
actor->SetMapper(mapper);
renderer->AddActor(actor);
```
4. **实时更新**：
在`OnMouseMove`事件处理中，每次鼠标移动，都需要更新线条的终点，然后调用`renderer->Render()`来刷新视图，使用户能够看到线条的动态变化。
5. **初始化和运行**：
创建`vtkRenderWindow`和`vtkRenderWindowInteractor`实例，设置好交互器并启动主循环，让用户可以与画面进行交互。
这个项目的核心在于理解VTK的交互机制，并能正确处理鼠标事件，以及有效地创建和更新图形元素。通过这种方式，我们可以创建一个直观的用户界面，让用户能够通过鼠标直接在三维空间中画出线条，增强了用户的交互体验。这种技术在许多科学可视化应用中非常常见，比如地质建模、医疗影像分析等。
文件下载
资源详情
[{"title":"（ 90 个子文件 217.62MB ） vtk+C++利用鼠标交互画线","children":[{"title":"drawLine","children":[{"title":"drawLine","children":[{"title":"MouseInteractorStyle.cpp <span style='color:#111;'> 4.50KB </span>","children":null,"spread":false},{"title":"drawLine.vcxproj <span style='color:#111;'> 13.82KB </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 2.28KB </span>","children":null,"spread":false},{"title":"x64","children":[{"title":"Debug","children":[{"title":"vc141.pdb <span style='color:#111;'> 2.46MB </span>","children":null,"spread":false},{"title":"mm.obj <span style='color:#111;'> 519.37KB </span>","children":null,"spread":false},{"title":"MouseInteractorStyle.obj <span style='color:#111;'> 370.92KB </span>","children":null,"spread":false},{"title":"vc141.idb <span style='color:#111;'> 387.00KB </span>","children":null,"spread":false},{"title":"vc142.idb <span style='color:#111;'> 1.83MB </span>","children":null,"spread":false},{"title":"vc142.pdb <span style='color:#111;'> 5.28MB </span>","children":null,"spread":false},{"title":"Vtk9Test.tlog","children":[{"title":"CL.write.1.tlog <span style='color:#111;'> 11.02KB </span>","children":null,"spread":false},{"title":"link.11232.delete.1.tlog <span style='color:#111;'> 1.22KB </span>","children":null,"spread":false},{"title":"Vtk9Test.write.1u.tlog <span style='color:#111;'> 19.55KB </span>","children":null,"spread":false},{"title":"link.14224.delete.1.tlog <span style='color:#111;'> 1.22KB </span>","children":null,"spread":false},{"title":"link.delete.1.tlog <span style='color:#111;'> 1.16KB </span>","children":null,"spread":false},{"title":"CL.command.1.tlog <span style='color:#111;'> 8.86KB </span>","children":null,"spread":false},{"title":"link.command.1.tlog <span style='color:#111;'> 18.98KB </span>","children":null,"spread":false},{"title":"link.8796.delete.1.tlog <span style='color:#111;'> 1.22KB </span>","children":null,"spread":false},{"title":"link.read.1.tlog <span style='color:#111;'> 21.45KB </span>","children":null,"spread":false},{"title":"link.write.1.tlog <span style='color:#111;'> 1.47KB </span>","children":null,"spread":false},{"title":"Vtk9Test.lastbuildstate <span style='color:#111;'> 150B </span>","children":null,"spread":false},{"title":"CL.read.1.tlog <span style='color:#111;'> 465.45KB </span>","children":null,"spread":false}],"spread":false},{"title":"drawLine.tlog","children":[{"title":"CL.write.1.tlog <span style='color:#111;'> 990B </span>","children":null,"spread":false},{"title":"drawLine.lastbuildstate <span style='color:#111;'> 148B </span>","children":null,"spread":false},{"title":"CL.command.1.tlog <span style='color:#111;'> 3.22KB </span>","children":null,"spread":false},{"title":"link.command.1.tlog <span style='color:#111;'> 18.10KB </span>","children":null,"spread":false},{"title":"link.read.1.tlog <span style='color:#111;'> 19.71KB </span>","children":null,"spread":false},{"title":"link.write.1.tlog <span style='color:#111;'> 502B </span>","children":null,"spread":false},{"title":"CL.read.1.tlog <span style='color:#111;'> 77.77KB </span>","children":null,"spread":false}],"spread":true},{"title":"Vtk9Test.ilk <span style='color:#111;'> 3.78MB </span>","children":null,"spread":false},{"title":"Vtk9Test.exe.recipe <span style='color:#111;'> 286B </span>","children":null,"spread":false},{"title":"vtkSeedWidgetTest.obj <span style='color:#111;'> 482.46KB </span>","children":null,"spread":false},{"title":"gunlun.obj <span style='color:#111;'> 150.71KB </span>","children":null,"spread":false},{"title":"drawLine.ilk <span style='color:#111;'> 1.33MB </span>","children":null,"spread":false},{"title":"vtkToigs.obj <span style='color:#111;'> 436.40KB </span>","children":null,"spread":false},{"title":"polydataCoposite.obj <span style='color:#111;'> 405.74KB </span>","children":null,"spread":false},{"title":"drawLineByMouse.obj <span style='color:#111;'> 349.28KB </span>","children":null,"spread":false},{"title":"covertToTxt.obj <span style='color:#111;'> 414.97KB </span>","children":null,"spread":false},{"title":"drawLine.exe.recipe <span style='color:#111;'> 284B </span>","children":null,"spread":false},{"title":"duomapper.obj <span style='color:#111;'> 386.46KB </span>","children":null,"spread":false},{"title":"Vtk9Test.log <span style='color:#111;'> 376B </span>","children":null,"spread":false},{"title":"drawLine.log <span style='color:#111;'> 348B </span>","children":null,"spread":false},{"title":"main.obj <span style='color:#111;'> 320.06KB </span>","children":null,"spread":false},{"title":"MBR.obj <span style='color:#111;'> 155.97KB </span>","children":null,"spread":false}],"spread":false}],"spread":true},{"title":"drawLine.vcxproj.filters <span style='color:#111;'> 1.16KB </span>","children":null,"spread":false},{"title":"drawLine.vcxproj.user <span style='color:#111;'> 165B </span>","children":null,"spread":false},{"title":"MouseInteractorStyle.h <span style='color:#111;'> 1.17KB </span>","children":null,"spread":false},{"title":"Debug","children":[{"title":"vc141.pdb <span style='color:#111;'> 2.42MB </span>","children":null,"spread":false},{"title":"vc141.idb <span style='color:#111;'> 363.00KB </span>","children":null,"spread":false},{"title":"Vtk9Test.tlog","children":[{"title":"unsuccessfulbuild <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"CL.write.1.tlog <span style='color:#111;'> 364B </span>","children":null,"spread":false},{"title":"CL.command.1.tlog <span style='color:#111;'> 666B </span>","children":null,"spread":false},{"title":"link.command.1.tlog <span style='color:#111;'> 2B </span>","children":null,"spread":false},{"title":"link.read.1.tlog <span style='color:#111;'> 2B </span>","children":null,"spread":false},{"title":"link.write.1.tlog <span style='color:#111;'> 2B </span>","children":null,"spread":false},{"title":"Vtk9Test.lastbuildstate <span style='color:#111;'> 196B </span>","children":null,"spread":false},{"title":"CL.read.1.tlog <span style='color:#111;'> 38.47KB </span>","children":null,"spread":false}],"spread":true},{"title":"Vtk9Test.log <span style='color:#111;'> 5.24KB </span>","children":null,"spread":false},{"title":"main.obj <span style='color:#111;'> 472.02KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":".vs","children":[{"title":"drawLine","children":[{"title":"v16","children":[{"title":"Browse.VC.db <span style='color:#111;'> 43.23MB </span>","children":null,"spread":false},{"title":".suo <span style='color:#111;'> 31.50KB </span>","children":null,"spread":false},{"title":"ipch","children":[{"title":"AutoPCH","children":[{"title":"281952c68ca91adc","children":[{"title":"MAIN.ipch <span style='color:#111;'> 102.06MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":"Vtk9Test","children":[{"title":"v15","children":[{"title":"Browse.VC.db <span style='color:#111;'> 45.79MB </span>","children":null,"spread":false},{"title":".suo <span style='color:#111;'> 31.00KB </span>","children":null,"spread":false},{"title":"ipch","children":[{"title":"AutoPCH","children":[{"title":"99a6d7a6f3453395","children":[{"title":"MAIN.ipch <span style='color:#111;'> 34.13MB </span>","children":null,"spread":false}],"spread":true},{"title":"ebe7d59e47d51456","children":[{"title":"MAIN.ipch <span style='color:#111;'> 34.69MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":"v16","children":[{"title":"Browse.VC.db <span style='color:#111;'> 44.92MB </span>","children":null,"spread":false},{"title":".suo <span style='color:#111;'> 69.00KB </span>","children":null,"spread":false},{"title":"ipch","children":[{"title":"AutoPCH","children":[{"title":"e4c3fc222c29605d","children":[{"title":"VTKSEEDWIDGETTEST.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":true},{"title":"6a8a524cd78cd5fa","children":[{"title":"MOUSEINTERACTORSTYLE.ipch <span style='color:#111;'> 101.13MB </span>","children":null,"spread":false}],"spread":true},{"title":"3211fb26eb2f6162","children":[{"title":"DUOMAPPER.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":true},{"title":"d93b196107483a0","children":[{"title":"MBR.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":false},{"title":"2d48f606037e3f59","children":[{"title":"POLYDATACOPOSITE.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":false},{"title":"d1ca7cd976f3cc4f","children":[{"title":"COVERTTOTXT.ipch <span style='color:#111;'> 95.94MB </span>","children":null,"spread":false}],"spread":false},{"title":"da929b3e90164784","children":[{"title":"MQML.ipch <span style='color:#111;'> 384.00KB </span>","children":null,"spread":false}],"spread":false},{"title":"1e7f6b59f5d21c0f","children":[{"title":"DRAWLINEBYMOUSE.ipch <span style='color:#111;'> 102.06MB </span>","children":null,"spread":false}],"spread":false},{"title":"3304a9f332e6b169","children":[{"title":"MM.ipch <span style='color:#111;'> 95.25MB </span>","children":null,"spread":false}],"spread":false},{"title":"f9490630b455d9e3","children":[{"title":"DRAWLINEBYMOUSE.ipch <span style='color:#111;'> 102.06MB </span>","children":null,"spread":false}],"spread":false},{"title":"ebfeda6c8d86f790","children":null,"spread":false},{"title":"5e1f34a76ccbe376","children":[{"title":"MAIN.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":false},{"title":"1eca31adafe7350","children":[{"title":"VTKTOIGS.ipch <span style='color:#111;'> 140.63MB </span>","children":null,"spread":false}],"spread":false},{"title":"34c09c28b5d81bd6","children":[{"title":"MOUSEINTERACTORSTYLE.ipch <span style='color:#111;'> 101.13MB </span>","children":null,"spread":false}],"spread":false},{"title":"766ea0f55d3188e2","children":[{"title":"GUNLUN.ipch <span style='color:#111;'> 39.44MB </span>","children":null,"spread":false}],"spread":false},{"title":"3c389c0d1af424da","children":[{"title":"MAIN.ipch <span style='color:#111;'> 102.06MB </span>","children":null,"spread":false}],"spread":false}],"spread":false}],"spread":true}],"spread":true}],"spread":true}],"spread":true},{"title":"x64","children":[{"title":"Debug","children":[{"title":"Vtk9Test.ilk <span style='color:#111;'> 2.31MB </span>","children":null,"spread":false},{"title":"Vtk9Test.exe <span style='color:#111;'> 426.00KB </span>","children":null,"spread":false},{"title":"drawLine.pdb <span style='color:#111;'> 5.08MB </span>","children":null,"spread":false},{"title":"Vtk9Test.exp <span style='color:#111;'> 1.32KB </span>","children":null,"spread":false},{"title":"drawLine.exe <span style='color:#111;'> 146.50KB </span>","children":null,"spread":false},{"title":"Vtk9Test.pdb <span style='color:#111;'> 51.01MB </span>","children":null,"spread":false},{"title":"Vtk9Test.lib <span style='color:#111;'> 2.72KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"drawLine.sln <span style='color:#111;'> 1.40KB </span>","children":null,"spread":false},{"title":"Debug","children":null,"spread":false}],"spread":true}],"spread":true}]
评论信息
其他资源
- 掌讯3560增加强刷.救砖模式增量单刷脚本（内有说明）.7z
- NETBACKUP APPLIANCE 5240
- B样条曲线演示程序的代码
- 读取mdb文件格式的小工具
- 基于Matlab-Simulink的遥感图像处理
- java语言开发的英汉词典
- Android BLE 源码
- ShareMouse4.0.48破解,仅供学习研究
- 用卡尔曼滤波算法估计soc
- 矩阵低秩分解理论
- pentaho-aggdesigner-algorithm-5.1.5-jhyde.zip
- 仓库管理系统（PB）
- 南京大学-数字图像处理-期末考试试卷2011.pdf
- Photoshop ICO插件（含64位版本）
- 混合动力汽车电驱动系统的功能安全概念设计_王林.pdf
- 虚拟数字人白皮书.pdf
- webpack资料.zip
- jdk api 1.8_google.zip
- USB3.0接口 USB转串口 CH340GAD设计原理图+PCB+封装库文件.zip
- 宿舍管理系统（C++MFC项目）
- 发明是这样诞生的-TRIZ理论全接触
- CrawlSpider豆瓣图书爬虫
- Phase-Locked Loops Design Simulation and Applications 6版
- PLC考试复习试题填空题综合题解答题
- face++API调用代码
免责申明
【只为小站】的资源来自网友分享，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，【只为小站】 无法对用户传输的作品、信息、内容的权属或合法性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论 【只为小站】 经营者是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。
本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二条之规定，若资源存在侵权或相关问题请联系本站客服人员，zhiweidada#qq.com，请把#换成@，本站将给予最大的支持与配合，做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明
本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二条之规定，若资源存在侵权或相关问题请联系本站客服人员，zhiweidada#qq.com，请把#换成@，本站将给予最大的支持与配合，做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明