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| static void | AddCapTrianglesHelper (int cap_index, int captri_count, const ON_3dex *captri_list, const ON_2dex *capV_list, const ON_3dVector FN, ON_Mesh *mesh) | 
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| static bool | FindNextKinkHelper (const ON_Curve *profile, double t0, double t1, double *kminus, double *kink_param, double *kplus) | 
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| static bool | GetBoundingBoxHelper (const ON_Extrusion &extrusion, ON_BoundingBox &bbox, const ON_Xform *xform) | 
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| static void | KinkEvalHelper (const ON_Curve *profile, double kminus, double kink_param, double kplus, ON_3dPoint &P, ON_3dVector &T0, ON_3dVector &T1, int *hint) | 
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| static void | ON_Extrusion_IsNotValidMessage (ON_TextLog *text_log, const char *msg) | 
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| static void | ON_ExtrusionCopyHelper (const ON_Extrusion &src, ON_Extrusion &dst) | 
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| static void | ON_ExtrusionInitializeHelper (ON_Extrusion &extrusion) | 
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| bool | ON_GetEndCapTransformation (ON_3dPoint P, ON_3dVector T, ON_3dVector U, const ON_3dVector *Normal, ON_Xform &xform, ON_Xform *scale2d, ON_Xform *rot3d) | 
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|  | ON_OBJECT_IMPLEMENT (ON_Extrusion, ON_Surface,"36F53175-72B8-4d47-BF1F-B4E6FC24F4B9") | 
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| static bool | ProfileHelper (int desired_orientation, ON_Curve *profile) | 
|  |