Here is a general conversion table showing how IGES entities are mapped to the ones of think3 when converting an IGES 3D model to the think3 format. 3D objects are omitted.
| IGES entity number |
IGES entity denomination | Corresponding think3 entity to which it is converted |
Notes | |
| 100 | Circular Arc | Arc | Conversion is controlled by the following parameters in the 2D-Geometry category of the IGES Options dialog box:
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| 102 | Composite Curve | Exploded into its component curves | — | |
| 104 | Conic Arc | NURBS curve / Conic Arc | Ellipses are converted to Conic Arcs, while all the other conics are converted to NURBS. | |
| 106 | Copious data | Exploded into its component lines | — | |
| — | IFORM 11,12 - Polyline | Exploded into its component lines | — | |
| — | IFORM 20,21 - Centerline | Line | — | |
| — | IFORM 31 to 38 - Section | Line | — | |
| — | IFORM 40 - Witness Line | Line | — | |
| — | IFORM 63 - Simple closed area | Exploded into its component lines | — | |
| 110 | Line | Line | — | |
| 112 | Parametric Spline Curve: | — | — | |
| — | CTYPE 1 - Linear | Exploded into its component lines | — | |
| — | CTYPE 2 - Quadratic | NURBS curve | — | |
| CTYPE 3 - Cubic | NURBS curve | The IGES spline will be converted to one think3 NURBS curve if its parameters fit the Spline conversion tolerance: value set in the 2D-Geometry category of the IGES Options dialog box. Otherwise it will be converted to several NURBS curves. | ||
| 124 | Transformation Matrix | Transformation Matrix (internally used by the program only) | — | |
| 126 | Rational B-Spline Curve | NURBS curve | — | |
| 130 | Offset Curve | Lines, Arcs, NURBS curves | Offsets of lines are converted to lines, offsets of arcs to arcs, offsets of conics to NURBS, offsets of NURBS to NURBS | |
| 202 | Angular Dimension | Angular Dimension | Conversion of angular dimensions is controlled by the following parameters in the 2D-Dimension category of the IGES Options dialog box:
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| 204 | Curve Dimension | Not converted | — | |
| 206 | Diameter Dimension | Diameter Dimension | — | |
| 208 | Flag Note | Not converted | — | |
| 210 | General Label | Exploded into its component entities | — | |
| 212 | General Note | Exploded into its component texts | Conversion of texts is controlled by the following parameters (2D-Text category of the IGES Options dialog box):
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| 214 | Leader (Arrow) | Arrowheads | Conversion of arrowheads is controlled by the following parameters in the 2D-Dimension category of the IGES Options dialog box:
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| 216 | Linear Dimension | Linear Dimension | Conversion of linear dimensions is controlled by the Disassemble linear dimensions on loading check box in the 2D-Dimension category of the IGES Options dialog box; if it's checked, linear dimensions are exploded into their component entities | |
| 218 | Ordinate Dimension | Ordinate Dimension | — | |
| 220 | Point Dimension | Not converted | — | |
| 222 | Radius Dimension | Radius Dimension | — | |
| 228 | General Symbol | Exploded into its component entities | — | |
| 230 | Sectioned Area | X-hatching | Conversion is controlled by the two following parameters in the 2D-Geometry category of the IGES Options dialog box:
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| 304 | Line Font Definition | Not converted | — | |
| 308 | Subfigure Definition | Exploded into its component entities | — | |
| 310 | Text Font Definition | Not converted | — | |
| 312 | Text Display Template | Not converted | — | |
| 314 | Color Definition | Not converted | — | |
| 320 | Network Subfigure Definition | Not converted | — | |
| 322 | Attribute Table Definition | — | — | |
| 402 | Associativity Instance | — | — | |
| — | IFORM 1 - Group | Group | — | |
| — | IFORM 7 - Group without back pointers | Group | — | |
| — | IFORM 14 - Ordered group with back pointers | Group | — | |
| — | IFORM 15 - Ordered group without back pointers | Group | — | |
| 404 | Drawing | Not converted | — | |
| 406 Form1 | Levels | Layer | Map table defined in the 2D - Layers category of the IGES Conversion Options. If no mapping is defined, the layer name is preserved as it is. | |
| 408 | Singular Subfigure Instance | Exploded into its component entities | Conversion is controlled by the following parameter (2D category of the IGES Options):
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| 410 | View | Exploded into its component entities | Conversion of the View entity is controlled by the following parameters (2D category of the IGES Options):
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| 412 | Rectangular Array Subfigure Instance | Exploded into its component entities | — | |
| 414 | Circular Array Subfigure Instance | Exploded into its component entities | — | |
| 420 | Network Subfigure Instance | Exploded into its component entities | — |