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EJShim
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added boundary actor
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5 files changed

+287
-9
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‎README.md

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#Mesh Parameterization Python
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# Mesh Parameterization Python
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python code of mesh parameterizaiton tutte, lscm
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#Prerequisites
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# Prerequisites
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- vtk
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- libigl
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‎main.py

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@@ -1,18 +1,34 @@
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import sys
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import os
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import vtk
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import igl
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from vtk.util import numpy_support
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import numpy as np
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import math
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import random
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from scipy.sparse import csr_matrix, coo_matrix
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vtk_out = vtk.vtkOutputWindow()
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vtk_out.SetInstance(vtk_out)
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#Make Shader
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rootPath = os.path.dirname( os.path.abspath( __file__ ))
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with open( os.path.join( rootPath, "shaders", "normalmap.glsl"), 'r') as shaderFile:
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FragmentShaderText = shaderFile.read()
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with open( os.path.join( rootPath, "shaders", "vertexShader.glsl"), 'r') as shaderFile:
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VertexShaderText = shaderFile.read()
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def tutte(V, F):
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#Get Boundary and Edge
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L = igl.boundary_loop(F)
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E = igl.edges(F)
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sizeL = len(L)
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1834

@@ -24,6 +40,8 @@ def tutte(V, F):
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#Iterate over edge, build some kind of sparse matrix,,
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E = igl.edges(F)
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I = []
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J = []
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Val = []
@@ -67,20 +85,43 @@ def tutte(V, F):
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# print(A.shape)
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U = igl.min_quad_with_fixed(A, B_flat, b, bc, Aeq, Beq, False)
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return U[1]
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return U[1], bc
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def MakeActor(polydata):
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mapper = vtk.vtkPolyDataMapper()
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mapper = vtk.vtkOpenGLPolyDataMapper()
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mapper.SetInputData(polydata)
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# mapper.SetVertexShaderCode(VertexShaderText)
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# mapper.SetFragmentShaderCode(FragmentShaderText)
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polydata.GetPointData().RemoveArray("Normals")
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actor = vtk.vtkActor()
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actor.SetMapper(mapper)
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return actor
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def MakeBoundaryActor(boundary):
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print(boundary.shape)
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boundary3D = np.concatenate( [boundary, np.zeros((len(boundary),1) )], axis=1)
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print(boundary3D)
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polydata = vtk.vtkPolyData()
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points = vtk.vtkPoints()
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points.SetData( numpy_support.numpy_to_vtk(boundary3D) )
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polydata.SetPoints(points)
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mapper = vtk.vtkOpenGLSphereMapper()
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mapper.SetRadius(.005)
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mapper.SetInputData(polydata)
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actor = vtk.vtkActor()
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actor.SetMapper(mapper)
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return actor
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85126
if __name__ == "__main__":
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iren = vtk.vtkRenderWindowInteractor()
@@ -103,26 +144,28 @@ def MakeActor(polydata):
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reader.Update()
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polydata = reader.GetOutput()
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actor = MakeActor(polydata)
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actor.SetScale(.01, .01, .01)
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ren.AddActor(actor)
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# polydata.GetPointData().RemoveArray("Normals")
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# Get V and F from polydatqa
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V = numpy_support.vtk_to_numpy( polydata.GetPoints().GetData())
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F = numpy_support.vtk_to_numpy( polydata.GetPolys().GetData() )
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F = F.reshape( int(len(F)/4), 4 )
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F = F[:, 1:]
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U_tutte = tutte(V, F)
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U_tutte, boundary = tutte(V, F)
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V_tutte = np.concatenate((U_tutte, np.zeros( (len(U_tutte),1) ) ), axis=1) #Make three-dimensional
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boundaryActor = MakeBoundaryActor(boundary)
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ren.AddActor(boundaryActor)
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tutte_points = numpy_support.numpy_to_vtk( V_tutte )
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tuttePoly = vtk.vtkPolyData()
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tuttePoly.DeepCopy(polydata)
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tuttePoly.GetPoints().SetData(tutte_points)
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tutteActor = MakeActor(tuttePoly)
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tutteActor.SetScale( 100, 100, 100 )
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# tutteActor.SetScale( 100, 100, 100 )
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127170
ren.AddActor(tutteActor)
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‎shaders/diffusemap.glsl

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//VTK::System::Dec
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uniform int PrimitiveIDOffset;
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// VC position of this fragment
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//VTK::PositionVC::Dec
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// optional color passed in from the vertex shader, vertexColor
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//VTK::Color::Dec
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// optional surface normal declaration
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//VTK::Normal::Dec
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// extra lighting parameters
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//VTK::Light::Dec
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// Texture coordinates
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//VTK::TCoord::Dec
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// picking support
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//VTK::Picking::Dec
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// Depth Peeling Support
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//VTK::DepthPeeling::Dec
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// clipping plane vars
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//VTK::Clip::Dec
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// the output of this shader
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//VTK::Output::Dec
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// Apple Bug
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//VTK::PrimID::Dec
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// handle coincident offsets
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//VTK::Coincident::Dec
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//VTK::ZBuffer::Dec
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void main()
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{
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// VC position of this fragment. This should not branch/return/discard.
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//VTK::PositionVC::Impl
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// Place any calls that require uniform flow (e.g. dFdx) here.
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//VTK::UniformFlow::Impl
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// Set gl_FragDepth here (gl_FragCoord.z by default)
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//VTK::Depth::Impl
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// Early depth peeling abort:
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//VTK::DepthPeeling::PreColor
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// Apple Bug
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//VTK::PrimID::Impl
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//VTK::Clip::Impl
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//VTK::Color::Impl
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// Generate the normal if we are not passed in one
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//VTK::TCoord::Impl
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gl_FragData[0] = vec4(diffuseColor, 1.0);
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if (gl_FragData[0].a <= 0.0)
69+
{
70+
discard;
71+
}
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//5cd3b62c
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//VTK::DepthPeeling::Impl
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//VTK::Picking::Impl
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// handle coincident offsets
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//VTK::Coincident::Impl
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//VTK::ZBuffer::Impl
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}

‎shaders/normalmap.glsl

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//VTK::System::Dec
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uniform int PrimitiveIDOffset;
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// VC position of this fragment
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//VTK::PositionVC::Dec
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// optional color passed in from the vertex shader, vertexColor
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//VTK::Color::Dec
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11+
// optional surface normal declaration
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//VTK::Normal::Dec
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// extra lighting parameters
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//VTK::Light::Dec
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// Texture coordinates
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//VTK::TCoord::Dec
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20+
// picking support
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//VTK::Picking::Dec
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23+
// Depth Peeling Support
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//VTK::DepthPeeling::Dec
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26+
// clipping plane vars
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//VTK::Clip::Dec
28+
29+
// the output of this shader
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//VTK::Output::Dec
31+
32+
// Apple Bug
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//VTK::PrimID::Dec
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35+
// handle coincident offsets
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//VTK::Coincident::Dec
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//VTK::ZBuffer::Dec
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40+
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void main()
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{
43+
// VC position of this fragment. This should not branch/return/discard.
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//VTK::PositionVC::Impl
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// Place any calls that require uniform flow (e.g. dFdx) here.
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//VTK::UniformFlow::Impl
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49+
// Set gl_FragDepth here (gl_FragCoord.z by default)
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//VTK::Depth::Impl
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52+
// Early depth peeling abort:
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//VTK::DepthPeeling::PreColor
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// Apple Bug
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//VTK::PrimID::Impl
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//VTK::Clip::Impl
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//VTK::Color::Impl
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// Generate the normal if we are not passed in one
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66+
//VTK::TCoord::Impl
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68+
gl_FragData[0] = vec4(normalize(normalVCVSOutput), 1.0);
69+
if (gl_FragData[0].a <= 0.0)
70+
{
71+
discard;
72+
}
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74+
//5cd3b62c
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76+
//VTK::DepthPeeling::Impl
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78+
//VTK::Picking::Impl
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// handle coincident offsets
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//VTK::Coincident::Impl
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//VTK::ZBuffer::Impl
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}

‎shaders/vertexShader.glsl

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//VTK::System::Dec
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPolyDataVS.glsl
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
11+
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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13+
This software is distributed WITHOUT ANY WARRANTY; without even
14+
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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attribute vec4 vertexMC;
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// frag position in VC
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//VTK::PositionVC::Dec
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24+
// optional normal declaration
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//VTK::Normal::Dec
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27+
// extra lighting parameters
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//VTK::Light::Dec
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// Texture coordinates
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//VTK::TCoord::Dec
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33+
// material property values
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//VTK::Color::Dec
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// clipping plane vars
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//VTK::Clip::Dec
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// camera and actor matrix values
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//VTK::Camera::Dec
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42+
// Apple Bug
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//VTK::PrimID::Dec
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// picking support
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//VTK::Picking::Dec
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out vec3 ejNormalMC;
49+
50+
void main()
51+
{
52+
ejNormalMC = normalize(normalMC);
53+
//VTK::Color::Impl
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//VTK::Normal::Impl
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//VTK::TCoord::Impl
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//VTK::Clip::Impl
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//VTK::PrimID::Impl
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//VTK::PositionVC::Impl
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//VTK::Light::Impl
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//VTK::Picking::Impl
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}

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