如何使用Python VTK高亮显示actor
前言:
VTK,(visualizationtoolkit)是一个开放资源的免费软件系统,主要用于三维计算机图形学、图像处理和可视化。Vtk是在面向对象原理的基础上设计和实现的,它的内核是用C++构建的,包含有大约250,000行代码,2000多个类,还包含有几个转换界面,因此也可以自由的通过Java,Tcl/Tk和Python各种语言使用vtk。
主要函数介绍:
NewPickedActor.GetProperty(): 通过该函数,可以设置actor的性质,如颜色、表面样式等。
vtk.vtkSphereSource(): 创建球体的函数,文中通过一个for循环创建了10个球体。
vtk.vtkMinimalStandardRandomSequence(): VTK的随机数生成器,用于代码中的十个球体,随机生成球体的大小和位置。
MouseInteractorHighLightActor: 定义actor操作方法,这个是一个鼠标操作控件的控制方法。
leftButtonPressEvent(self, obj, event): 这是一个事件触发函数,当鼠标左键点击对应的actor时,会触发函数,对点的actor高亮显示。
主要代码如下:
#!/usr/bin/env python
# noinspection PyUnresolvedReferences
import vtk
colors = vtk.vtkNamedColors()
NUMBER_OF_SPHERES = 10
class MouseInteractorHighLightActor(vtk.vtkInteractorStyleTrackballCamera):
def __init__(self, parent=None):
self.AddObserver("LeftButtonPressEvent", self.leftButtonPressEvent)
self.LastPickedActor = None
self.LastPickedProperty = vtk.vtkProperty()
def leftButtonPressEvent(self, obj, event):
clickPos = self.GetInteractor().GetEventPosition()
picker = vtk.vtkPropPicker()
picker.Pick(clickPos[0], clickPos[1], 0, self.GetDefaultRenderer())
# 创建一个新的actor
self.NewPickedActor = picker.GetActor()
# If something was selected
if self.NewPickedActor:
# If we picked something before, reset its property
if self.LastPickedActor:
self.LastPickedActor.GetProperty().DeepCopy(self.LastPickedProperty)
# Save the property of the picked actor so that we can
# restore it next time
self.LastPickedProperty.DeepCopy(self.NewPickedActor.GetProperty())
# 高亮选中球体,并显示边缘
self.NewPickedActor.GetProperty().SetColor(colors.GetColor3d('Red'))
self.NewPickedActor.GetProperty().SetDiffuse(1.0)
self.NewPickedActor.GetProperty().SetSpecular(0.0)
self.NewPickedActor.GetProperty().EdgeVisibilityOn()
# 保存最后一个选中的actor
self.LastPickedActor = self.NewPickedActor
self.OnLeftButtonDown()
return
def main():
# 创建render和window
renderer = vtk.vtkRenderer()
renderer.SetBackground(colors.GetColor3d('SteelBlue'))
renwin = vtk.vtkRenderWindow()
renwin.AddRenderer(renderer)
renwin.SetSize(640, 480)
renwin.SetWindowName('HighlightPickedActor')
# 建立interactor(交互操作)
interactor = vtk.vtkRenderWindowInteractor()
interactor.SetRenderWindow(renwin)
# 交互操作方法
style = MouseInteractorHighLightActor()
style.SetDefaultRenderer(renderer)
interactor.SetInteractorStyle(style)
randomSequence = vtk.vtkMinimalStandardRandomSequence()
# randomSequence.SetSeed(1043618065)
# randomSequence.SetSeed(5170)
randomSequence.SetSeed(8775070)
# 添加球体
for i in range(NUMBER_OF_SPHERES):
source = vtk.vtkSphereSource()
# random position and radius
x = randomSequence.GetRangeValue(-5.0, 5.0)
randomSequence.Next()
y = randomSequence.GetRangeValue(-5.0, 5.0)
randomSequence.Next()
z = randomSequence.GetRangeValue(-5.0, 5.0)
randomSequence.Next()
radius = randomSequence.GetRangeValue(0.5, 1.0)
randomSequence.Next()
source.SetRadius(radius)
source.SetCenter(x, y, z)
source.SetPhiResolution(11)
source.SetThetaResolution(21)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(source.GetOutputPort())
actor = vtk.vtkActor()
actor.SetMapper(mapper)
r = randomSequence.GetRangeValue(0.4, 1.0)
randomSequence.Next()
g = randomSequence.GetRangeValue(0.4, 1.0)
randomSequence.Next()
b = randomSequence.GetRangeValue(0.4, 1.0)
randomSequence.Next()
actor.GetProperty().SetDiffuseColor(r, g, b)
actor.GetProperty().SetDiffuse(.8)
actor.GetProperty().SetSpecular(.5)
actor.GetProperty().SetSpecularColor(colors.GetColor3d('White'))
actor.GetProperty().SetSpecularPower(30.0)
renderer.AddActor(actor)
# 运行
interactor.Initialize()
renwin.Render()
interactor.Start()
if __name__ == '__main__':
main()
显示结果如下: 未选择球体:
已选取球体后:
到此这篇关于如何使用Python VTK高亮显示actor的文章就介绍到这了,更多相关Python VTK高亮显示actor内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!
免责声明:
① 本站未注明“稿件来源”的信息均来自网络整理。其文字、图片和音视频稿件的所属权归原作者所有。本站收集整理出于非商业性的教育和科研之目的,并不意味着本站赞同其观点或证实其内容的真实性。仅作为临时的测试数据,供内部测试之用。本站并未授权任何人以任何方式主动获取本站任何信息。
② 本站未注明“稿件来源”的临时测试数据将在测试完成后最终做删除处理。有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341