COMPUTER SCIENCE AND ENGINEERING
COMPUTER GRAPHICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In front of an object
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Behind the object
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In the middle of a group of objects
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All of the above
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Detailed explanation-1: -Viewing in 3D involves the following considerations:-We can view an object from any spatial position, eg. In front of an object, Behind the object, In the middle of a group of objects, Inside an object, etc.-3D descriptions of objects must be projected onto the flat viewing surface of the output device.
Detailed explanation-2: -The viewing-pipeline in 3 dimensions is almost the same as the 2D-viewing-pipeline. Only after the definition of the viewing direction and orientation (i.e., of the camera) an additional projection step is done, which is the reduction of 3D-data onto a projection plane: norm.
Detailed explanation-3: -In Revit, there are two kinds of 3D views: orthographic and perspective 3D views. Orthographic 3D views show the building model in a 3D view where all components are the same size, regardless of the camera’s distance.