Page 1 CAD Software CAD software can be divided based upon the technology used: 1. 2-D drawing. Its applications include, ? · mechanical part drawing ? · printed-circuit board design and layout ? · facilities layout ? · cartography 2. Basic 3-D drawing (such as wire-frame modelling) 3. Sculptured surfaces (such as surface modelling) 4. 3-D solid modelling 5. Engineering analysis Page 2 CAD Software CAD software can be divided based upon the technology used: 1. 2-D drawing. Its applications include, ? · mechanical part drawing ? · printed-circuit board design and layout ? · facilities layout ? · cartography 2. Basic 3-D drawing (such as wire-frame modelling) 3. Sculptured surfaces (such as surface modelling) 4. 3-D solid modelling 5. Engineering analysis Geometric Modeling Geometric modelling refers to a set of techniques concerned mainly with developing efficient representations of geometric aspects of a design. Therefore, geometric modelling is a fundamental part of all CAD tools. Page 3 CAD Software CAD software can be divided based upon the technology used: 1. 2-D drawing. Its applications include, ? · mechanical part drawing ? · printed-circuit board design and layout ? · facilities layout ? · cartography 2. Basic 3-D drawing (such as wire-frame modelling) 3. Sculptured surfaces (such as surface modelling) 4. 3-D solid modelling 5. Engineering analysis Geometric Modeling Geometric modelling refers to a set of techniques concerned mainly with developing efficient representations of geometric aspects of a design. Therefore, geometric modelling is a fundamental part of all CAD tools. Geometric modeling is the basic of many applications such as: • Mass property calculations. • Mechanism analysis. • Finite-element modelling. • NC programming. Requirements of geometric modelling include: • Completeness of the part representation. • The modelling method should be easy to use by designers. • Rendering capabilities (which means how fast the entities can be accessed and displayed by the computer). Page 4 CAD Software CAD software can be divided based upon the technology used: 1. 2-D drawing. Its applications include, ? · mechanical part drawing ? · printed-circuit board design and layout ? · facilities layout ? · cartography 2. Basic 3-D drawing (such as wire-frame modelling) 3. Sculptured surfaces (such as surface modelling) 4. 3-D solid modelling 5. Engineering analysis Geometric Modeling Geometric modelling refers to a set of techniques concerned mainly with developing efficient representations of geometric aspects of a design. Therefore, geometric modelling is a fundamental part of all CAD tools. Geometric modeling is the basic of many applications such as: • Mass property calculations. • Mechanism analysis. • Finite-element modelling. • NC programming. Requirements of geometric modelling include: • Completeness of the part representation. • The modelling method should be easy to use by designers. • Rendering capabilities (which means how fast the entities can be accessed and displayed by the computer). Geometric Modeling Approaches The basic geometric modelling approaches available to designers on CAD/CAM systems are: 1. Wire-frame modeling. 2. Surface modeling. 3. Solid modeling. Page 5 CAD Software CAD software can be divided based upon the technology used: 1. 2-D drawing. Its applications include, ? · mechanical part drawing ? · printed-circuit board design and layout ? · facilities layout ? · cartography 2. Basic 3-D drawing (such as wire-frame modelling) 3. Sculptured surfaces (such as surface modelling) 4. 3-D solid modelling 5. Engineering analysis Geometric Modeling Geometric modelling refers to a set of techniques concerned mainly with developing efficient representations of geometric aspects of a design. Therefore, geometric modelling is a fundamental part of all CAD tools. Geometric modeling is the basic of many applications such as: • Mass property calculations. • Mechanism analysis. • Finite-element modelling. • NC programming. Requirements of geometric modelling include: • Completeness of the part representation. • The modelling method should be easy to use by designers. • Rendering capabilities (which means how fast the entities can be accessed and displayed by the computer). Geometric Modeling Approaches The basic geometric modelling approaches available to designers on CAD/CAM systems are: 1. Wire-frame modeling. 2. Surface modeling. 3. Solid modeling. Wire-frame Modeling Wire-frame modelling uses points and curves (i.e. lines, circles, arcs), and so forth to define objects. The user uses edges and vertices of the part to form a 3-D object Wire-frame model partRead More

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