Conversion of mesh geometry to watertight boundary representation

Methods, systems, and apparatus for computer aided design of physical structures include: producing a quad parameterization computer model (including quad parameter domains) of a polygon mesh, where quad parameter domain(s) adjacent to a boundary curve interpolate the boundary curve; and forming a c...

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Bibliographische Detailangaben
Hauptverfasser:	Amagliani, Marco, Marinov, Martin Cvetanov, Charrot, Peter Hugh
Format:	Patent
Sprache:	eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CALCULATING COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT COMPUTING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING COUNTING DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING ELECTRIC DIGITAL DATA PROCESSING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS REGULATING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Methods, systems, and apparatus for computer aided design of physical structures include: producing a quad parameterization computer model (including quad parameter domains) of a polygon mesh, where quad parameter domain(s) adjacent to a boundary curve interpolate the boundary curve; and forming a computer model of a three dimensional object by constructing locally refinable surface representation(s) from the quad parameterization computer model, refining a boundary of the locally refinable surface representation(s) to approximate the boundary curve within a first tolerance value set in accordance with a smallest dimension representable by a geometry modeling kernel, freezing control points of the locally refinable surface representation(s) at the boundary, and modifying remaining interior portions of the locally refinable surface representation(s) to approximate the polygon mesh within a second tolerance value that is at least an order of magnitude larger than the first tolerance value.