Lecture Notes

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• Views
• In a model, one has two distinctly different types of data: model data (points, lines, surfaces, and objects), and view data (composed of eye points and center of interests, type of construction, and other data).
• These two types of data are not related. The proof of this is that one can have a model with no data contained in it, and yet still have an infinite number of views.
• However, only when one chooses to fit the model in the view window, the two data sets become briefly interrelated. This is because the max and min x,y, and z points of the model are calculated, a box is constructed based off of these points, from which the centroid is calculated and is placed in the center of the view window; thus fitting the model in the display window.
• When setting up a view, one has two options to control: the view type (which is really the point of view) and the type of construction.
• Under view types, there are oblique views and projection views such as front, right, top, ect.
• Under type of construction, one can choose from axonometric, isometric, perspective and panorama.
• While setting up views one must keep in mind two terms. Generally speaking, we have the point from which the view is generated, what we might call the point of view, and a vector with the correct angle and pitch, which terminates at an object point.