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Stella4D

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Stella4D description
Stella4D expands on Great Stella to include four-dimensional polytopes, known as polychora Stella4D expands on Great Stella to include four-dimensional polytopes, known as polychora.
See 3D cross-sections animating in real-time, see complete polychora projected into 3D and try 4D rotation, and view 3D nets and vertex figures of 4D polytopes.
Here are some key features of "Stella4D":
· Includes all features from Great Stella.
· Built-in models (in addition to those from Great Stella):
· All 1849 known uniform polychora. This is the only place you can see all of these.
· A separate category groups all the convex polychora together.
· Any uniform duoprism or antiduoprism can be created.
· Various uniform fissaries, scaliforms, and compounds are also included.
· Duals of any polychoron are available.
· Compounds of polychora with their duals.
· View 4D models projected into 3D (perspective or orthogonal, with or without back-cell or front-cell removal). Interactively rotate the projection direction, or choose cell-first, face-first, edge-first or vertex-first. The default auto setting usually finds the projection giving the greatest symmetry.
· View 3D cross-sections of 4D polytopes.
· Interactively change the slicing depth in real time.
· Slice cell-first, face-first, edge-first or vertex-first.
· Interactively rotate the slicing plane.
· See how the cross-section fits into the 3D projection of the original 4D model.
· Snap the cross-section depth to the nearest vertex, and step through the depths where the plane hits a vertex.
· Show small spheres when true vertices are close to the slicing plane.
· Color cells along the slicing direction to create more colorful slices.
· View 3D nets of 4D polytopes. Manually rearrange the cells in the net.
· View 3D vertex figures and individual 3D cells of 4D polytopes.
· You may use the model from any view as the new 3D base model (for creating nets, stellations etc). This includes 3D cross-section, 3D nets, 3D projections of 4D models, 3D vertex figures, or individual 3D cells.
· Truncate, rectify, and expand 4D polytopes.
· Create convex hulls or convex cores of 4D polytopes.
· Delete or keep just one part of a 4D compound.
· Create 4D prisms from 3D polyhedra.
· When displaying using spheres and cylinders, their size will vary correctly according to the 4D projection (spheres further away in 4D will appear smaller in a perspective projection).
· Most of Great Stella's colouring and hiding options for faces are supported for cells in 4D. Undo/redo, memory slots and Measurement Mode are also supported.
· Import any 4D model in 4D OFF format
Limitations:
· Only some models are available

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