141 lines
4.1 KiB
Python
141 lines
4.1 KiB
Python
from __future__ import print_function
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# Add the igl library to the modules search path
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import sys, os
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sys.path.insert(0, os.getcwd() + "/../")
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import pyigl as igl
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from iglhelpers import e2p
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import math
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TUTORIAL_SHARED_PATH = "../../tutorial/shared/"
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global V, F, T, tree, FN, VN, EN, E, EMAP, max_distance, slice_z, overlay
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V = igl.eigen.MatrixXd()
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F = igl.eigen.MatrixXi()
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T = igl.eigen.MatrixXi()
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tree = igl.AABB()
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FN = igl.eigen.MatrixXd()
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VN = igl.eigen.MatrixXd()
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EN = igl.eigen.MatrixXd()
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E = igl.eigen.MatrixXi()
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EMAP = igl.eigen.MatrixXi()
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max_distance = 1
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slice_z = 0.5
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overlay = False
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viewer = igl.viewer.Viewer()
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def update_visualization(viewer):
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global V, F, T, tree, FN, VN, EN, E, EMAP, max_distance, slice_z, overlay
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plane = igl.eigen.MatrixXd([0.0, 0.0, 1.0, -((1-slice_z) * V.col(2).minCoeff() + slice_z * V.col(2).maxCoeff())])
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V_vis = igl.eigen.MatrixXd()
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F_vis = igl.eigen.MatrixXi()
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# Extract triangle mesh slice through volume mesh and subdivide nasty triangles
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J = igl.eigen.MatrixXi()
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bary = igl.eigen.SparseMatrixd()
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igl.slice_tets(V, T, plane, V_vis, F_vis, J, bary)
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max_l = 0.03
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# while True:
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# l = igl.eigen.MatrixXd()
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# igl.edge_lengths(V_vis, F_vis, l)
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# l /= (V_vis.colwise().maxCoeff() - V_vis.colwise().minCoeff()).norm()
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#
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# if l.maxCoeff() < max_l:
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# break
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#
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# bad = e2p(l.rowwiseMaxCoeff())
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# bad = bad > max_l
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# F_vis_bad = igl.eigen.MatrixXi()
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# F_vis_good = igl.eigen.MatrixXi()
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# igl::slice_mask(F_vis, bad, 1, F_vis_bad);
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# igl::slice_mask(F_vis, (bad!=true).eval(), 1, F_vis_good);
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# igl.upsample(V_vis, F_vis_bad)
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# F_vis = igl.cat(1, F_vis_bad, F_vis_good)
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# #Compute signed distance
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# S_vis = igl.eigen.MatrixXd()
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# I = igl.eigen.MatrixXi()
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# N = igl.eigen.MatrixXd()
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# C = igl.eigen.MatrixXd()
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# # Bunny is a watertight mesh so use pseudonormal for signing
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# igl.signed_distance_pseudonormal(V_vis, V, F, tree, FN, VN, EN, EMAP, S_vis, I, C, N)
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# # push to [0,1] range
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# S_vis.array() = 0.5*(S_vis.array()/max_distance)+0.5;
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# C_vis = igl.eigen.MatrixXi()
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# # color without normalizing
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# igl.parula(S_vis, False, C_vis)
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# const auto & append_mesh = [&C_vis,&F_vis,&V_vis](const Eigen::MatrixXd & V, const Eigen::MatrixXi & F, const RowVector3d & color)
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# F_vis.conservativeResize(F_vis.rows() + F.rows(), 3)
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# F_vis.bottomRows(F.rows()) = F.array() + V_vis.rows()
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# V_vis.conservativeResize(V_vis.rows() + V.rows(), 3)
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# V_vis.bottomRows(V.rows()) = V
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# C_vis.conservativeResize(C_vis.rows() + V.rows(), 3)
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# C_vis.bottomRows(V.rows()).rowwise() = color
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# if overlay:
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# append_mesh(V, F, RowVector3d(0.8,0.8,0.8))
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viewer.data.clear()
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viewer.data.set_mesh(V_vis, F_vis)
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# viewer.data.set_colors(C_vis)
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viewer.core.lighting_factor = overlay
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def key_down(viewer, key, modifier):
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global slice_z, overlay
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if key == ord(' '):
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overlay = not overlay
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elif key == ord('.'):
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slice_z = min(slice_z + 0.01, 0.99)
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elif key == ord(','):
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slice_z = max(slice_z - 0.01, 0.01)
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else:
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return False
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update_visualization(viewer)
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return True
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print("Press [space] to toggle showing surface.")
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print("Press '.'/',' to push back/pull forward slicing plane.")
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#Load mesh: (V,T) tet-mesh of convex hull, F contains original surface triangles
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igl.readMESH(TUTORIAL_SHARED_PATH + "bunny.mesh", V, T, F);
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#Call to point_mesh_squared_distance to determine bounds
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sqrD = igl.eigen.MatrixXd()
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I = igl.eigen.MatrixXi()
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C = igl.eigen.MatrixXd()
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igl.point_mesh_squared_distance(V, V, F, sqrD, I, C)
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max_distance = math.sqrt(sqrD.maxCoeff())
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#Precompute signed distance AABB tree
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tree.init(V, F)
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#Precompute vertex, edge and face normals
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igl.per_face_normals(V, F, FN)
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igl.per_vertex_normals(V, F, igl.PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE, FN, VN)
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igl.per_edge_normals(V, F, igl.PER_EDGE_NORMALS_WEIGHTING_TYPE_UNIFORM, FN, EN, E, EMAP)
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#Plot the generated mesh
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update_visualization(viewer);
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viewer.callback_key_down = key_down
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viewer.core.show_lines = False
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viewer.launch()
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