1.1 Introduction
1.2 Commands
2. Unfolding step by step
3. Cutting
3.1 How to cut ?
3.2 Where to cut ?
4. Adjusting and packing
5. UNFOLD3D Interface
5.1 Menus and tools
5.2 The menu bar
5.3 The main toolbar
5.4 The viewport toolbar
5.5 The edition toolbar
5.6 Preferences
6. UV Edition
6.1 Rotation/translation/scaling
6.2 Pinning
6.3 Horizontal, vertical constraints
7. Scripting
3.1 - Modeling Rules
Unfold3D requires the input mesh to respect a certain number of
modeling rules. These rules are generally respected as rules of general
modeling hygiene, but they become compulsory to apply Unfold3D's
mathematical algorithms:
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Rule 1: no edge with 3+ neighboring polygons (see figure). All edges must belong to at most two polygons. |
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Rule 2: no butterfly point (see figure). A vertice cannot have more than two border edges (ie: edges with only one neighboring polygon) connected to it. |
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Rule 3: the imported file must comply with OBJ standards, and not use the the " relative vertex numbering " mode. |
Note that these rules do not limit the possibilities of modeling:
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Unfold3D has no problem dealing with holes in the mesh;
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the modeling rules are written for triangles, but Unfold3D is perfectly fit to deal with quads or n-gons - Unfold3D will triangulate the mesh anyway, and try to avoid as much as possible the forbidden cases.
Note that non-convex n-gons may cause problems though:
