Python 官方文档：入门教程 => 点击学习
主要函数介绍： vtk.vtkPoints() 在VTK中用于定义点的类，使用points.InsertPoint(index, x, y, z) 即可插入点集。
主要函数介绍：
vtk.vtkPoints() 在VTK中用于定义点的类，使用points.InsertPoint(index, x, y, z) 即可插入点集。函数中，第一个参数是点的序号，后面是三个参数是点的坐标。
vtk.vtkLineSource() 在VTK中定义直线的类，通过SetPoints(points),输入直线经过的点。
vtk.vtkParametricSpline() 在VTK中定义曲线的类，通过SetPoints(points),输入曲线经过的点。
vtk.vtkParametricFunctionSource() 曲线插值拟合函数，可以将输入的点集拟合成一条曲线。有很多生成方法。我们可以简单的看一下VTK官方文档介绍
S\CALAR_NONE - Scalars are not generated (default).
SCALAR_U - The scalar is set to the u-value.
SCALAR_V - The scalar is set to the v-value.
SCALAR_U0 - The scalar is set to 1 if u = (u_max - u_min)/2 = u_avg, 0 otherwise.
SCALAR_V0 - The scalar is set to 1 if v = (v_max - v_min)/2 = v_avg, 0 otherwise.
SCALAR_U0V0 - The scalar is set to 1 if u == u_avg, 2 if v == v_avg, 3 if u = u_avg && v = v_avg, 0 otherwise.
SCALAR_MODULUS - The scalar is set to (sqrt(uu+vv)), this is measured relative to (u_avg,v_avg).
SCALAR_PHASE - The scalar is set to (atan2(v,u)) (in degrees, 0 to 360), this is measured relative to (u_avg,v_avg).
SCALAR_QUADRANT - The scalar is set to 1, 2, 3 or 4. depending upon the quadrant of the point (u,v).
SCALAR_X - The scalar is set to the x-value.
SCALAR_Y - The scalar is set to the y-value.
SCALAR_Z - The scalar is set to the z-value.
SCALAR_DISTANCE - The scalar is set to (sqrt(xx+yy+z*z)). I.e. distance from the origin.
SCALAR_USER_DEFINED - The scalar is set to the value returned from EvaluateScalar().
actor.GetProperty().SetColor() 线条颜色配置
actor.GetProperty().SetLineWidth() 线条宽度配置
拟合曲线代码：
import vtk
points = vtk.vtkPoints() # 定义一个点工具
points.InsertPoint(0, 329, 338, 45) # 使用InsertPoint可以插入点
# 注意：points.InsertPoint(a, b, c, d)
# 其中a表示点的序号，(b,c,d)表示点的三维坐标
points.InsertPoint(1, 328, 319, 46)
points.InsertPoint(2, 300, 329, 96)
# 定义曲线工具
# 将前面的几个点插值拟合成一条曲线
spline = vtk.vtkParametricSpline()
spline.SetPoints(points)
splineSource = vtk.vtkParametricFunctionSource()
splineSource.SetParametricFunction(spline)
splineSource.Update()
splineMapper = vtk.vtkPolyDataMapper()
splineMapper.SetInputConnection(splineSource.GetOutputPort())
splineActor = vtk.vtkActor()
splineActor.SetMapper(splineMapper)
# 设置线条颜色
splineActor.GetProperty().SetColor(0.3800, 0.7000, 0.1600)
# 设置线条宽度
splineActor.GetProperty().SetLineWidth(5)
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
ren1.AddActor(splineActor)
ren1.SetBackground(1, 1, 1)
renWin.SetSize(250, 250)
renWin.Render()
iren.Start()
绘制直线代码
import vtk
points = vtk.vtkPoints() # 定义一个点工具
points.InsertPoint(0, 329, 338, 45) # 使用InsertPoint可以插入点
# 注意：points.InsertPoint(a, b, c, d)
# 其中a表示点的序号，(b,c,d)表示点的三维坐标
points.InsertPoint(1, 328, 319, 46)
points.InsertPoint(2, 300, 329, 96)
# 定义直线工具
lineSource = vtk.vtkLineSource()
lineSource.SetPoints(points)
lineSource.Update()
lineMapper = vtk.vtkPolyDataMapper()
lineMapper.SetInputConnection(lineSource.GetOutputPort())
splineActor = vtk.vtkActor()
splineActor.SetMapper(lineMapper)
# 设置线条颜色
splineActor.GetProperty().SetColor(0.3800, 0.7000, 0.1600)
# 设置线条宽度
splineActor.GetProperty().SetLineWidth(5)
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
ren1.AddActor(splineActor)
ren1.SetBackground(1, 1, 1)
renWin.SetSize(250, 250)
renWin.Render()
iren.Start()
到此这篇关于如何使用python-VTK绘制线条的文章就介绍到这了,更多相关Python-VTK绘制线条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！
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本文标题: 如何使用Python VTK绘制线条
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