small change in paperfold
This commit is contained in:
parent
b11ee2f93a
commit
5790a0f5ed
@ -55,7 +55,8 @@ class Paperfold(inkex.EffectExtension):
|
||||
# Compute the third point of a triangle when two points and all edge lengths are given
|
||||
def getThirdPoint(self, v0, v1, l01, l12, l20):
|
||||
v2rotx = (l01 ** 2 + l20 ** 2 - l12 ** 2) / (2 * l01)
|
||||
v2roty0 = np.sqrt((l01 + l20 + l12) * (l01 + l20 - l12) * (l01 - l20 + l12) * (-l01 + l20 + l12)) / (2 * l01)
|
||||
val = (l01 + l20 + l12) * (l01 + l20 - l12) * (l01 - l20 + l12) * (-l01 + l20 + l12)
|
||||
v2roty0 = np.sqrt(abs(val)) / (2 * l01)
|
||||
|
||||
v2roty1 = - v2roty0
|
||||
|
||||
@ -144,6 +145,10 @@ class Paperfold(inkex.EffectExtension):
|
||||
dihedralAngles = np.empty(numUnfoldedEdges, dtype=float) # Valley folding or mountain folding
|
||||
connections = np.empty(numFaces, dtype=int) # Saves which original triangle belongs to the unrolled one
|
||||
|
||||
numFaces = mesh.n_faces()
|
||||
sizeTree = spanningTree.number_of_edges()
|
||||
numUnfoldedEdges = 3 * numFaces - sizeTree
|
||||
|
||||
# Select the first triangle as desired
|
||||
startingNode = list(spanningTree.nodes())[0]
|
||||
startingTriangle = mesh.face_handle(startingNode)
|
||||
@ -218,65 +223,68 @@ class Paperfold(inkex.EffectExtension):
|
||||
|
||||
# We walk through the tree
|
||||
for dualEdge in nx.dfs_edges(spanningTree, source=startingNode):
|
||||
foldingEdge = mesh.edge_handle(spanningTree[dualEdge[0]][dualEdge[1]]['idx'])
|
||||
# Find the corresponding half edge in the output triangle
|
||||
foldingHalfEdge = mesh.halfedge_handle(foldingEdge, 0)
|
||||
if not (mesh.face_handle(foldingHalfEdge).idx() == dualEdge[0]):
|
||||
foldingHalfEdge = mesh.halfedge_handle(foldingEdge, 1)
|
||||
try:
|
||||
foldingEdge = mesh.edge_handle(spanningTree[dualEdge[0]][dualEdge[1]]['idx'])
|
||||
# Find the corresponding half edge in the output triangle
|
||||
foldingHalfEdge = mesh.halfedge_handle(foldingEdge, 0)
|
||||
if not (mesh.face_handle(foldingHalfEdge).idx() == dualEdge[0]):
|
||||
foldingHalfEdge = mesh.halfedge_handle(foldingEdge, 1)
|
||||
|
||||
# Find the corresponding unwound half edge
|
||||
unfoldedLastHalfEdge = unfoldedMesh.halfedge_handle(halfEdgeConnections[foldingHalfEdge.idx()])
|
||||
# Find the corresponding unwound half edge
|
||||
unfoldedLastHalfEdge = unfoldedMesh.halfedge_handle(halfEdgeConnections[foldingHalfEdge.idx()])
|
||||
|
||||
# Find the point in the unrolled triangle that is not on the folding edge
|
||||
oppositeUnfoldedVertex = unfoldedMesh.to_vertex_handle(unfoldedMesh.next_halfedge_handle(unfoldedLastHalfEdge))
|
||||
# Find the point in the unrolled triangle that is not on the folding edge
|
||||
oppositeUnfoldedVertex = unfoldedMesh.to_vertex_handle(unfoldedMesh.next_halfedge_handle(unfoldedLastHalfEdge))
|
||||
|
||||
# We turn the half edges over to lie in the new triangle
|
||||
foldingHalfEdge = mesh.opposite_halfedge_handle(foldingHalfEdge)
|
||||
unfoldedLastHalfEdge = unfoldedMesh.opposite_halfedge_handle(unfoldedLastHalfEdge)
|
||||
# We turn the half edges over to lie in the new triangle
|
||||
foldingHalfEdge = mesh.opposite_halfedge_handle(foldingHalfEdge)
|
||||
unfoldedLastHalfEdge = unfoldedMesh.opposite_halfedge_handle(unfoldedLastHalfEdge)
|
||||
|
||||
# The two corners of the folding edge
|
||||
unfoldedFromVertex = unfoldedMesh.from_vertex_handle(unfoldedLastHalfEdge)
|
||||
unfoldedToVertex = unfoldedMesh.to_vertex_handle(unfoldedLastHalfEdge)
|
||||
# The two corners of the folding edge
|
||||
unfoldedFromVertex = unfoldedMesh.from_vertex_handle(unfoldedLastHalfEdge)
|
||||
unfoldedToVertex = unfoldedMesh.to_vertex_handle(unfoldedLastHalfEdge)
|
||||
|
||||
# Calculate the edge lengths in the new triangle
|
||||
secondHalfEdgeInFace = mesh.next_halfedge_handle(foldingHalfEdge)
|
||||
thirdHalfEdgeInFace = mesh.next_halfedge_handle(secondHalfEdgeInFace)
|
||||
# Calculate the edge lengths in the new triangle
|
||||
secondHalfEdgeInFace = mesh.next_halfedge_handle(foldingHalfEdge)
|
||||
thirdHalfEdgeInFace = mesh.next_halfedge_handle(secondHalfEdgeInFace)
|
||||
|
||||
originalHalfEdges = [foldingHalfEdge, secondHalfEdgeInFace, thirdHalfEdgeInFace]
|
||||
originalHalfEdges = [foldingHalfEdge, secondHalfEdgeInFace, thirdHalfEdgeInFace]
|
||||
|
||||
edgelengths = [mesh.calc_edge_length(foldingHalfEdge), mesh.calc_edge_length(secondHalfEdgeInFace),
|
||||
mesh.calc_edge_length(thirdHalfEdgeInFace)]
|
||||
edgelengths = [mesh.calc_edge_length(foldingHalfEdge), mesh.calc_edge_length(secondHalfEdgeInFace),
|
||||
mesh.calc_edge_length(thirdHalfEdgeInFace)]
|
||||
|
||||
# We calculate the two possibilities for the third point in the triangle
|
||||
[newUnfoldedVertex0, newUnfoldedVertex1] = self.getThirdPoint(unfoldedMesh.point(unfoldedFromVertex),
|
||||
unfoldedMesh.point(unfoldedToVertex), edgelengths[0],
|
||||
edgelengths[1], edgelengths[2])
|
||||
# We calculate the two possibilities for the third point in the triangle
|
||||
[newUnfoldedVertex0, newUnfoldedVertex1] = self.getThirdPoint(unfoldedMesh.point(unfoldedFromVertex),
|
||||
unfoldedMesh.point(unfoldedToVertex), edgelengths[0],
|
||||
edgelengths[1], edgelengths[2])
|
||||
|
||||
|
||||
newUnfoldedVertex = unfoldedMesh.add_vertex(newUnfoldedVertex0)
|
||||
newUnfoldedVertex = unfoldedMesh.add_vertex(newUnfoldedVertex0)
|
||||
|
||||
# Make the face
|
||||
newface = unfoldedMesh.add_face(unfoldedFromVertex, unfoldedToVertex, newUnfoldedVertex)
|
||||
# Make the face
|
||||
newface = unfoldedMesh.add_face(unfoldedFromVertex, unfoldedToVertex, newUnfoldedVertex)
|
||||
|
||||
secondUnfoldedHalfEdge = unfoldedMesh.next_halfedge_handle(unfoldedLastHalfEdge)
|
||||
thirdUnfoldedHalfEdge = unfoldedMesh.next_halfedge_handle(secondUnfoldedHalfEdge)
|
||||
unfoldedHalfEdges = [unfoldedLastHalfEdge, secondUnfoldedHalfEdge, thirdUnfoldedHalfEdge]
|
||||
secondUnfoldedHalfEdge = unfoldedMesh.next_halfedge_handle(unfoldedLastHalfEdge)
|
||||
thirdUnfoldedHalfEdge = unfoldedMesh.next_halfedge_handle(secondUnfoldedHalfEdge)
|
||||
unfoldedHalfEdges = [unfoldedLastHalfEdge, secondUnfoldedHalfEdge, thirdUnfoldedHalfEdge]
|
||||
|
||||
# Saving the information about edges and page
|
||||
# Dotted one's in the output
|
||||
unfoldedLastEdge = unfoldedMesh.edge_handle(unfoldedLastHalfEdge)
|
||||
isFoldingEdge[unfoldedLastEdge.idx()] = True
|
||||
# Saving the information about edges and page
|
||||
# Dotted one's in the output
|
||||
unfoldedLastEdge = unfoldedMesh.edge_handle(unfoldedLastHalfEdge)
|
||||
isFoldingEdge[unfoldedLastEdge.idx()] = True
|
||||
|
||||
# Gluing number and folding direction
|
||||
self.addVisualisationData(mesh, unfoldedMesh, originalHalfEdges, unfoldedHalfEdges, glueNumber, dihedralAngles)
|
||||
# Gluing number and folding direction
|
||||
self.addVisualisationData(mesh, unfoldedMesh, originalHalfEdges, unfoldedHalfEdges, glueNumber, dihedralAngles)
|
||||
|
||||
# Related page
|
||||
connections[newface.idx()] = dualEdge[1]
|
||||
|
||||
# Identify the half edges
|
||||
for i in range(3):
|
||||
halfEdgeConnections[originalHalfEdges[i].idx()] = unfoldedHalfEdges[i].idx()
|
||||
# Related page
|
||||
connections[newface.idx()] = dualEdge[1]
|
||||
|
||||
# Identify the half edges
|
||||
for i in range(3):
|
||||
halfEdgeConnections[originalHalfEdges[i].idx()] = unfoldedHalfEdges[i].idx()
|
||||
except Exception as e:
|
||||
inkex.utils.debug("Error walking the dual tree at dualEdge {}".format(e))
|
||||
exit(1)
|
||||
return [unfoldedMesh, isFoldingEdge, connections, glueNumber, dihedralAngles]
|
||||
except Exception as e:
|
||||
inkex.utils.debug("Error: model could not be unfolded. Check for:")
|
||||
@ -286,7 +294,6 @@ class Paperfold(inkex.EffectExtension):
|
||||
inkex.utils.debug(" - missing units")
|
||||
inkex.utils.debug(" - missing coordinate system")
|
||||
inkex.utils.debug(" - multiple bodies in one file")
|
||||
inkex.utils.debug("error was: " + str(e))
|
||||
exit(1)
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user