MIT OpenCourseWare http://ocw.mit.edu 4.500 Introduction to Design Computing Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.Solid Modeling Operations, Translations and Objects 4.500 – MIT Prof. Larry Sass 1Solid Modeling is a System of Assembled Primitives Cylinder Cone Torus Square Wedge Sphere 4.500 – MIT Prof. Larry Sass 2Coordinate Systems 0,10,10 0,10,0 10,0,10 10,10,10 0,0,10 UCS User Coordinate 10,10,0 System z y 0,0,0 10,0,0 x 4.500 – MIT Prof. Larry Sass 3Coordinate Systems UCS User Coordinate System 4.500 – MIT Prof. Larry Sass 4Direction of Faces 1 2 3 4 4.500 – MIT Prof. Larry Sass 5Extrusion 4.500 – MIT Prof. Larry Sass 6Revolution 4.500 – MIT Prof. Larry Sass 7Boolean Operations Union British Mathematician George Boole Subtraction Intersection 4.500 – MIT Prof. Larry Sass 82D Projections 94.500 – MIT Prof. Larry SassSolid Modeling Problems (Large computer models) • Slow • Solid Modeling is Hard to Manipulate • Data Representation is heavy Solution • Reduce amount of geometry • Subdivide Geometry Good Computer Modeling • Select Key Places to Model in Detail • Break parts into layer understandable categories • Hide often to check for intersections • Accuracy = Reality 4.500 – MIT 10 Prof. Larry
View Full Document
Unlocking...