Homework 1 - 123 ME 2 Name Section AA AB AC AD AE AF AG ZN Visualization and CAD Spring 10 Due 4/7 by 5:00pm HW1 1 Write your name and circle your

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ME 123 HW 1 Name: ________________________________ Section: AA AB AC AD AE AF AG ZN Visualization and CAD // Spring 10 // Due: 4/7 by 5:00pm / 1. Write your name and circle your section in the space provided above. Please initial here if you would like your papers returned to MEB 231 ________ 2. Parametric models are sometime referred to as models that have “intelligence”. Please explain why this might be so. What are the two types for parameters? 3. Explain the benefits of rapid prototyping. 4. We discussed 3 types of 3D modeling (wireframe, surface, solid). Please give an example of a situation in which you would chose to use each type and explain why it would best suit that application. 5. The Necker cube (shown below) is the classic example given to illustrate how wireframes are ambiguous. Please draw a wireframe sketch (besides the two given in lecture) that is ambiguous and explain how it is ambiguous. For example in the Necker cube we can not tell which surface of the block is visible, the top or bottom.
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6. Sketch two possible cross-sections that could be extruded to form a base feature for each of the objects shown below. Indicate which would be the best choice for an initial profile. Then indicate on each best choice profile what would be the correct plane (top, front, right) to select when drawing that profile. Make sure that the cross-sections that you propose will create a representational base feature and minimize the number of additional features necessary to model the object. Be sure to follow the General Homework Instructions available on the web.
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Homework 1 - 123 ME 2 Name Section AA AB AC AD AE AF AG ZN Visualization and CAD Spring 10 Due 4/7 by 5:00pm HW1 1 Write your name and circle your

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