def main():
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/bunny.off", V1, F1)
# Init the viewer
viewer = igl.viewer.Viewer()
# Extend viewer menu
viewer.callback_init = viewer_init
# Plot the mesh
viewer.data.set_mesh(V1, F1)
viewer.launch()
def main():
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "bumpy.off", V, F)
# Create a Vector Field
temp_field = igl.eigen.MatrixXd()
b = igl.eigen.MatrixXi([[0]])
bc = igl.eigen.MatrixXd([[1, 1, 1]])
S = igl.eigen.MatrixXd() # unused
degree = 3
igl.comiso.nrosy(V, F, b, bc, igl.eigen.MatrixXi(), igl.eigen.MatrixXd(), igl.eigen.MatrixXd(), 1, 0.5, temp_field, S)
temp_field2 = igl.eigen.MatrixXd()
representative_to_nrosy(V, F, temp_field, degree, temp_field2)
# Initialize tracer
igl.streamlines_init(V, F, temp_field2, treat_as_symmetric, data, state)
# Setup viewer
viewer = igl.viewer.Viewer()
viewer.data.set_mesh(V, F)
viewer.callback_pre_draw = pre_draw
viewer.callback_key_down = key_down
viewer.core.show_lines = False
viewer.core.is_animating = False
viewer.core.animation_max_fps = 30.0
# Paint mesh grayish
C = igl.eigen.MatrixXd()
C.setConstant(viewer.data.V.rows(), 3, .9)
viewer.data.set_colors(C)
# Draw vector field on sample points
state0 = state.copy()
igl.streamlines_next(V, F, data, state0)
v = state0.end_point - state0.start_point
v = v.rowwiseNormalized()
viewer.data.add_edges(state0.start_point,
state0.start_point + 0.059 * v,
igl.eigen.MatrixXd([[1.0, 1.0, 1.0]]))
print("Press [space] to toggle animation")
viewer.launch()
if key == ord('1'):
# # Clear should be called before drawing the mesh
viewer.data.clear();
# # Draw_mesh creates or updates the vertices and faces of the displayed mesh.
# # If a mesh is already displayed, draw_mesh returns an error if the given V and
# # F have size different than the current ones
viewer.data.set_mesh(V1, F1);
viewer.core.align_camera_center(V1,F1);
elif key == ord('2'):
viewer.data.clear();
viewer.data.set_mesh(V2, F2);
viewer.core.align_camera_center(V2,F2);
return False
# Load two meshes
igl.readOFF("../../tutorial/shared/bumpy.off", V1, F1);
igl.readOFF("../../tutorial/shared/fertility.off", V2, F2);
print("1 Switch to bump mesh")
print("2 Switch to fertility mesh")
viewer = igl.viewer.Viewer()
# Register a keyboard callback that allows to switch between
# the two loaded meshes
viewer.callback_key_pressed = key_pressed
viewer.data.set_mesh(V1, F1)
viewer.launch()
if key == ord('8'):
# Global parametrization in 3D with seams
viewer.data.set_mesh(V, F)
viewer.data.set_uv(UV_seams,FUV_seams)
viewer.core.show_texture = True
viewer.data.set_colors(igl.eigen.MatrixXd([[1,1,1]]))
viewer.data.set_texture(texture_R, texture_B, texture_G)
viewer.core.align_camera_center(viewer.data.V,viewer.data.F)
return False
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/3holes.off", V, F)
# Compute face barycenters
igl.barycenter(V, F, B)
# Compute scale for visualizing fields
global_scale = .5*igl.avg_edge_length(V, F)
# Contrain one face
b = igl.eigen.MatrixXi([[0]])
bc = igl.eigen.MatrixXd([[1,0,0]])
# Create a smooth 4-RoSy field
S = igl.eigen.MatrixXd()
igl.comiso.nrosy(V,F,b,bc,igl.eigen.MatrixXi(),igl.eigen.MatrixXd(),igl.eigen.MatrixXd(),4,0.5,X1,S)
import sys, os # Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["glfw"] check_dependencies(dependencies) # Load mesh V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() igl.readOFF(TUTORIAL_SHARED_PATH + "bumpy.off", V, F) # Compute Gaussian curvature K = igl.eigen.MatrixXd() igl.gaussian_curvature(V, F, K) # Compute pseudocolor C = igl.eigen.MatrixXd() igl.jet(K, True, C) # Plot the mesh with pseudocolors viewer = igl.glfw.Viewer() viewer.data().set_mesh(V, F) viewer.data().set_colors(C) viewer.launch()
import sys, os # Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["viewer"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() # Load a mesh in OFF format igl.readOFF(TUTORIAL_SHARED_PATH + "cheburashka.off", V, F) # Read scalar function values from a file, U: #V by 1 U = igl.eigen.MatrixXd() igl.readDMAT(TUTORIAL_SHARED_PATH + "cheburashka-scalar.dmat", U) U = U.col(0) # Compute gradient operator: #F*3 by #V G = igl.eigen.SparseMatrixd() igl.grad(V, F, G) # Compute gradient of U GU = (G * U).MapMatrix(F.rows(), 3) # Compute gradient magnitude GU_mag = GU.rowwiseNorm()
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF("../../tutorial/shared/cheburashka.off",V,F)
# Two fixed points
# Left hand, left foot
b = igl.eigen.MatrixXi([[4331],[5957]])
bc = igl.eigen.MatrixXd([[1],[-1]])
# Construct Laplacian and mass matrix
L = igl.eigen.SparseMatrixd()
M = igl.eigen.SparseMatrixd()
Minv = igl.eigen.SparseMatrixd()
Q = igl.eigen.SparseMatrixd()
igl.cotmatrix(V,F,L)
igl.massmatrix(V,F,igl.MASSMATRIX_TYPE_VORONOI,M)
igl.invert_diag(M,Minv)
# Bi-Laplacian
Q = L * (Minv * L);
# Zero linear term
B = igl.eigen.MatrixXd.Zero(V.rows(),1);
elif key == ord('q'):
V_uv = initial_guess
if show_uv:
viewer.data().set_mesh(V_uv, F)
viewer.core.align_camera_center(V_uv, F)
else:
viewer.data().set_mesh(V, F)
viewer.core.align_camera_center(V, F)
viewer.data().compute_normals()
return False
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "camelhead.off", V, F)
# Compute the initial solution for ARAP (harmonic parametrization)
bnd = igl.eigen.MatrixXi()
igl.boundary_loop(F, bnd)
bnd_uv = igl.eigen.MatrixXd()
igl.map_vertices_to_circle(V, bnd, bnd_uv)
igl.harmonic(V, F, bnd, bnd_uv, 1, initial_guess)
# Add dynamic regularization to avoid to specify boundary conditions
arap_data = igl.ARAPData()
arap_data.with_dynamics = True
b = igl.eigen.MatrixXi.Zero(0, 0)
bc = igl.eigen.MatrixXd.Zero(0, 0)
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF("../../tutorial/shared/camelhead.off",V,F)
# Find boundary edges
E = igl.eigen.MatrixXi()
igl.boundary_facets(F,E);
# Find boundary vertices
b = igl.eigen.MatrixXi()
IA = igl.eigen.MatrixXi()
IC = igl.eigen.MatrixXi()
igl.unique(E,b,IA,IC);
# List of all vertex indices
vall = igl.eigen.MatrixXi()
vin = igl.eigen.MatrixXi()
igl.coloni(0,V.rows()-1,vall)
# List of interior indices
igl.setdiff(vall,b,vin,IA)
viewer.data().set_colors(C)
elif key == ord('.'):
viewer.core.lighting_factor += 0.1
elif key == ord(','):
viewer.core.lighting_factor -= 0.1
else:
return False
viewer.core.lighting_factor = min(max(viewer.core.lighting_factor, 0.0), 1.0)
return True
print("Press 1 to turn off Ambient Occlusion\nPress 2 to turn on Ambient Occlusion\nPress . to turn up lighting\nPress , to turn down lighting")
# Load a surface mesh
igl.readOFF(TUTORIAL_SHARED_PATH + "fertility.off", V, F)
# Calculate vertex normals
igl.per_vertex_normals(V, F, N)
# Compute ambient occlusion factor using embree
igl.embree.ambient_occlusion(V, F, V, N, 500, AO)
AO = 1.0 - AO
# Plot the generated mesh
viewer.data().set_mesh(V, F)
key_down(viewer, ord('2'), 0)
viewer.callback_key_down = key_down
viewer.data().show_lines = False
viewer.core.lighting_factor = 0.0
viewer.launch()
# Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["viewer"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() C = igl.eigen.MatrixXd() # Load a mesh in OFF format igl.readOFF(TUTORIAL_SHARED_PATH + "screwdriver.off", V, F) # Plot the mesh viewer = igl.viewer.Viewer() viewer.data.set_mesh(V, F) # Use the z coordinate as a scalar field over the surface Z = V.col(2) # Compute per-vertex colors igl.jet(Z, True, C) # Add per-vertex colors viewer.data.set_colors(C) # Launch the viewer
import sys, os # Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["viewer"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() igl.readOFF(TUTORIAL_SHARED_PATH + "decimated-knight.off", V, F) # Sort barycenters lexicographically BC = igl.eigen.MatrixXd() sorted_BC = igl.eigen.MatrixXd() igl.barycenter(V, F, BC) I = igl.eigen.MatrixXi() J = igl.eigen.MatrixXi() # sorted_BC = BC(I,:) igl.sortrows(BC, True, sorted_BC, I) # Get sorted "place" from sorted indices J.resize(I.rows(), 1)
# This function is called every time a keyboard button is pressed
def key_pressed(viewer, key, modifier):
if key == ord('1'):
viewer.data.set_normals(N_faces)
return True
elif key == ord('2'):
viewer.data.set_normals(N_vertices)
return True
elif key == ord('3'):
viewer.data.set_normals(N_corners)
return True
return False
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/fandisk.off", V, F);
# Compute per-face normals
N_faces = igl.eigen.MatrixXd()
igl.per_face_normals(V,F,N_faces)
# Compute per-vertex normals
N_vertices = igl.eigen.MatrixXd()
igl.per_vertex_normals(V,F,igl.PER_VERTEX_NORMALS_WEIGHTING_TYPE_AREA,N_vertices)
# Compute per-corner normals, |dihedral angle| > 20 degrees --> crease
N_corners = igl.eigen.MatrixXd()
igl.per_corner_normals(V,F,20,N_corners)
# Plot the mesh
viewer = igl.viewer.Viewer()
if key == ord('1'):
# # Clear should be called before drawing the mesh
viewer.data().clear()
# # Draw_mesh creates or updates the vertices and faces of the displayed mesh.
# # If a mesh is already displayed, draw_mesh returns an error if the given V and
# # F have size different than the current ones
viewer.data().set_mesh(V1, F1)
viewer.core.align_camera_center(V1,F1)
elif key == ord('2'):
viewer.data().clear()
viewer.data().set_mesh(V2, F2)
viewer.core.align_camera_center(V2,F2)
return False
# Load two meshes
igl.readOFF(TUTORIAL_SHARED_PATH + "bumpy.off", V1, F1)
igl.readOFF(TUTORIAL_SHARED_PATH + "fertility.off", V2, F2)
print("1 Switch to bump mesh")
print("2 Switch to fertility mesh")
viewer = igl.glfw.Viewer()
# Register a keyboard callback that allows to switch between
# the two loaded meshes
viewer.callback_key_pressed = key_pressed
viewer.data().set_mesh(V1, F1)
viewer.launch()
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
# Load a mesh in OFF format
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF("../../tutorial/shared/beetle.off", V, F)
# Plot the mesh
viewer = igl.viewer.Viewer();
viewer.data.set_mesh(V, F);
viewer.launch();
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/bunny.off", V, F)
# Find the bounding box
m = V.colwiseMinCoeff()
M = V.colwiseMaxCoeff()
# Corners of the bounding box
V_box = igl.eigen.MatrixXd(
[
[m[0,0], m[0,1], m[0,2]],
[M[0,0], m[0,1], m[0,2]],
[M[0,0], M[0,1], m[0,2]],
[m[0,0], M[0,1], m[0,2]],
[m[0,0], m[0,1], M[0,2]],
[M[0,0], m[0,1], M[0,2]],
[M[0,0], M[0,1], M[0,2]],
[m[0,0], M[0,1], M[0,2]]
]
)
if __name__ == "__main__":
VA = igl.eigen.MatrixXd()
FA = igl.eigen.MatrixXi()
VB = igl.eigen.MatrixXd()
FB = igl.eigen.MatrixXi()
VC = igl.eigen.MatrixXd()
FC = igl.eigen.MatrixXi()
J = igl.eigen.MatrixXi()
Red = igl.eigen.MatrixXd([[1, 0, 0]])
Green = igl.eigen.MatrixXd([[0, 1, 0]])
# Load meshes in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "cheburashka.off", VA, FA)
igl.readOFF(TUTORIAL_SHARED_PATH + "decimated-knight.off", VB, FB)
boolean_type = igl.MESH_BOOLEAN_TYPE_UNION
viewer = igl.viewer.Viewer()
update(viewer)
print(
"Usage: Press '.' to switch to next boolean operation type. \nPress ',' to switch to previous boolean operation type. \nPress ']' to push near cutting plane away from camera. \nPress '[' to pull near cutting plane closer to camera. \nHint: investigate _inside_ the model to see orientation changes. \n")
viewer.core.show_lines = True
viewer.callback_key_down = key_down
viewer.core.camera_dnear = 3.9
viewer.launch()
import math
global V
global U
global F
global L
V = igl.eigen.MatrixXd()
U = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
L = igl.eigen.SparseMatrixd()
viewer = igl.viewer.Viewer()
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/cow.off", V, F)
# Compute Laplace-Beltrami operator: #V by #V
igl.cotmatrix(V,F,L)
# Alternative construction of same Laplacian
G = igl.eigen.SparseMatrixd()
K = igl.eigen.SparseMatrixd()
# Gradient/Divergence
igl.grad(V,F,G);
# Diagonal per-triangle "mass matrix"
dblA = igl.eigen.MatrixXd()
igl.doublearea(V,F,dblA)
from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["viewer"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() U = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() L = igl.eigen.SparseMatrixd() viewer = igl.viewer.Viewer() # Load a mesh in OFF format igl.readOFF(TUTORIAL_SHARED_PATH + "cow.off", V, F) # Compute Laplace-Beltrami operator: #V by #V igl.cotmatrix(V, F, L) # Alternative construction of same Laplacian G = igl.eigen.SparseMatrixd() K = igl.eigen.SparseMatrixd() # Gradient/Divergence igl.grad(V, F, G) # Diagonal per-triangle "mass matrix" dblA = igl.eigen.MatrixXd() igl.doublearea(V, F, dblA)
## This is a test application for the TCPViewer
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import os
import time
# Launch the tcp viewer
os.system("python ../tcpviewer.py&")
# Wait for it to set up the socket
time.sleep(1)
import pyigl as igl
import tcpviewer
# Read a mesh
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF('../../tutorial/shared/beetle.off', V, F)
# Send it to the viewer
viewer = tcpviewer.TCPViewer()
viewer.data.set_mesh(V, F)
viewer.launch()
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
# Load mesh
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF("../../tutorial/shared/bumpy.off",V,F);
# Compute Gaussian curvature
K = igl.eigen.MatrixXd();
igl.gaussian_curvature(V,F,K);
# Compute pseudocolor
C = igl.eigen.MatrixXd();
igl.jet(K,True,C);
# Plot the mesh with pseudocolors
viewer = igl.viewer.Viewer()
viewer.data.set_mesh(V, F)
viewer.data.set_colors(C)
viewer.launch()
# Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["glfw"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() # Load a mesh in OFF format igl.readOFF(TUTORIAL_SHARED_PATH + "cheburashka.off", V, F) # Read scalar function values from a file, U: #V by 1 U = igl.eigen.MatrixXd() igl.readDMAT(TUTORIAL_SHARED_PATH + "cheburashka-scalar.dmat", U) U = U.col(0) # Compute gradient operator: #F*3 by #V G = igl.eigen.SparseMatrixd() igl.grad(V, F, G) # Compute gradient of U GU = (G * U).MapMatrix(F.rows(), 3) # Compute gradient magnitude GU_mag = GU.rowwiseNorm()
viewer.data.set_colors(C)
# Plot a line for each edge of the quad mesh
viewer.data.add_edges(PQC0plan, PQC1plan, igl.eigen.MatrixXd([[0, 0, 0]]))
viewer.data.add_edges(PQC1plan, PQC2plan, igl.eigen.MatrixXd([[0, 0, 0]]))
viewer.data.add_edges(PQC2plan, PQC3plan, igl.eigen.MatrixXd([[0, 0, 0]]))
viewer.data.add_edges(PQC3plan, PQC0plan, igl.eigen.MatrixXd([[0, 0, 0]]))
else:
return False
return True
# Load a quad mesh generated by a conjugate field
igl.readOFF(TUTORIAL_SHARED_PATH + "inspired_mesh_quads_Conjugate.off", VQC, FQC)
# Convert it to a triangle mesh
FQCtri.resize(2 * FQC.rows(), 3)
FQCtriUpper = igl.eigen.MatrixXi(FQC.rows(), 3)
FQCtriLower = igl.eigen.MatrixXi(FQC.rows(), 3)
FQCtriUpper.setCol(0, FQC.col(0))
FQCtriUpper.setCol(1, FQC.col(1))
FQCtriUpper.setCol(2, FQC.col(2))
FQCtriLower.setCol(0, FQC.col(2))
FQCtriLower.setCol(1, FQC.col(3))
FQCtriLower.setCol(2, FQC.col(0))
FQCtri.setTopRows(FQCtriUpper.rows(), FQCtriUpper)
# This file is part of libigl, a simple c++ geometry processing library. # # Copyright (C) 2017 Sebastian Koch <*****@*****.**> and Daniele Panozzo <*****@*****.**> # # This Source Code Form is subject to the terms of the Mozilla Public License # v. 2.0. If a copy of the MPL was not distributed with this file, You can # obtain one at http://mozilla.org/MPL/2.0/. import sys, os # Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["viewer"] check_dependencies(dependencies) # Load a mesh in OFF format V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() igl.readOFF(TUTORIAL_SHARED_PATH + "beetle.off", V, F) # Plot the mesh viewer = igl.viewer.Viewer() viewer.data.set_mesh(V, F) viewer.launch()
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
C = igl.eigen.MatrixXd()
# Load a mesh in OFF format
igl.readOFF("../../tutorial/shared/screwdriver.off", V, F)
# Plot the mesh
viewer = igl.viewer.Viewer()
viewer.data.set_mesh(V, F)
# Use the z coordinate as a scalar field over the surface
Z = V.col(2);
# Compute per-vertex colors
igl.jet(Z,True,C)
# Add per-vertex colors
viewer.data.set_colors(C)
# Launch the viewer
viewer.launch()
# Global parametrization in 3D with seams
viewer.data().set_mesh(V, F)
viewer.data().set_uv(UV_seams, FUV_seams)
viewer.data().show_texture = True
viewer.data().set_colors(igl.eigen.MatrixXd([[1, 1, 1]]))
viewer.data().set_texture(texture_R, texture_B, texture_G)
viewer.core.align_camera_center(viewer.data().V, viewer.data().F)
return False
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "3holes.off", V, F)
# Compute face barycenters
igl.barycenter(V, F, B)
# Compute scale for visualizing fields
global_scale = .5 * igl.avg_edge_length(V, F)
# Contrain one face
b = igl.eigen.MatrixXd([[0]]).castint()
bc = igl.eigen.MatrixXd([[1, 0, 0]])
# Create a smooth 4-RoSy field
S = igl.eigen.MatrixXd()
igl.comiso.nrosy(V, F, b, bc, igl.eigen.MatrixXi(), igl.eigen.MatrixXd(), igl.eigen.MatrixXd(), 4, 0.5, X1, S)
# Add the igl library to the modules search path
import sys, os
sys.path.insert(0, os.getcwd() + "/../")
import pyigl as igl
V = igl.eigen.MatrixXd()
F = igl.eigen.MatrixXi()
igl.readOFF("../../tutorial/shared/decimated-knight.off",V,F)
# Sort barycenters lexicographically
BC = igl.eigen.MatrixXd()
sorted_BC = igl.eigen.MatrixXd()
igl.barycenter(V,F,BC);
I = igl.eigen.MatrixXi()
J = igl.eigen.MatrixXi()
# sorted_BC = BC(I,:)
igl.sortrows(BC,True,sorted_BC,I)
# Get sorted "place" from sorted indices
J.resize(I.rows(),1)
# J(I) = 1:numel(I)
igl.slice_into(igl.coloni(0,I.size()-1),I,J)
# Pseudo-color based on sorted place
C = igl.eigen.MatrixXd()
# This function is called every time a keyboard button is pressed
def key_pressed(viewer, key, modifier):
if key == ord('1'):
viewer.data.set_normals(N_faces)
return True
elif key == ord('2'):
viewer.data.set_normals(N_vertices)
return True
elif key == ord('3'):
viewer.data.set_normals(N_corners)
return True
return False
# Load a mesh in OFF format
igl.readOFF(TUTORIAL_SHARED_PATH + "fandisk.off", V, F)
# Compute per-face normals
N_faces = igl.eigen.MatrixXd()
igl.per_face_normals(V, F, N_faces)
# Compute per-vertex normals
N_vertices = igl.eigen.MatrixXd()
igl.per_vertex_normals(V, F, igl.PER_VERTEX_NORMALS_WEIGHTING_TYPE_AREA, N_vertices)
# Compute per-corner normals, |dihedral angle| > 20 degrees --> crease
N_corners = igl.eigen.MatrixXd()
igl.per_corner_normals(V, F, 20, N_corners)
# Plot the mesh
viewer = igl.viewer.Viewer()
# Add the igl library to the modules search path sys.path.insert(0, os.getcwd() + "/../") import pyigl as igl from shared import TUTORIAL_SHARED_PATH, check_dependencies dependencies = ["glfw"] check_dependencies(dependencies) V = igl.eigen.MatrixXd() F = igl.eigen.MatrixXi() C = igl.eigen.MatrixXd() # Load a mesh in OFF format igl.readOFF(TUTORIAL_SHARED_PATH + "screwdriver.off", V, F) # Plot the mesh viewer = igl.glfw.Viewer() viewer.data().set_mesh(V, F) # Use the z coordinate as a scalar field over the surface Z = V.col(2) # Compute per-vertex colors igl.jet(Z, True, C) # Add per-vertex colors viewer.data().set_colors(C) # Launch the viewer
