# We're in trouble if a single triangle doesn't fit "Returns True if polygon width/height are within PX_WIDTH and PX_HEIGHT." "Returns a list of all triangles that are coplanar neighbors to given triangle." If neighbor != None and not neighbor in visited and neighbor in face: Neighbor_face = triangle_to_face( neighbor) If t0 > tolerance and t0 tolerance and t1 0: # we've determined that they are not parallel or identical lines # The result should be the column vector (-t0, t1).ĭeterminant = vector0. # try to invert the matrix whose columns are v0, v1, then multiply against p0-p1. # solve for a t wherein the intersect, if possible # form a parameterize of self's side with t ranging from 0 to 1 # if they have exactly one intersection (read: not parallel), these triangles overlap. # to do this, check if each side of self intersects any side of other "Returns true if the interiors of the projections of these triangles onto the xy plane overlap." #if self.get_sidelengths() != initial_sidelengths: apply_2d_transform( cos_theta, - sin_theta, sin_theta, cos_theta) dot_product( vertexB) * relative_neighborB. # We go counterclockwise within self, counterclockwise within neighbor "Rotate a flattened triangle so that it aligns with its nth neighbor." z) / 3.0ĭef apply_2d_transform( self, a, b, c, d): "Returns -1 if not neighbors, which neigbhor of t1 t2 is otherwise." "on the assumption that v0 through v2 are counterclockwise, return unit normal vector"Ī = self. Return "Triangle: \n" + vertex_string + " \n" + neighbor_string Neighbor_string = neighbor_string + "None \n" Vertex_string = "vertices) + ", " + str( self. It can handle 3D formed surfaces interpreting the 3D shape to 2D, using various adjustable criteria, by predicting and reversing the deformation that takes place during the. # for the general problem of unfolding a 3d (.stl) model Mesh Unfolder imports file formats - DXF (3D faces or Polymeshes), STL (triangles), 3DS (Autocad 3D Studio), OBJ (Wavefront) and other mesh data, unfolds it into a flat sheet and exports the output back to CAD systems.
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