By Telea A.
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Additional info for Data visualization. Principles and practice
What kind of graphics objects should we use to do the drawing? Essentially, all these questions revolve around the issue of representing continuous data, such as the function f , surface S, and variable domains X and Y , on a computer. Strictly speaking, to draw the graph, we should perform the warping of (x, y, 0) to (x, y, f (x, y)) for all points (x, y) in D. However, a computer algorithm can perform only a ﬁnite number of operations. 1. 1. Elevation plot for the function f (x, y) = e−(x sample points.
Third, my thanks go to my editor, Sarah Chow, from CRC Press. Her kind and constant support, careful guidance, and encouragements have been crucial to the successful completion of the second edition of this book. 19 20 1. Introduction Thanks go also to the University of Groningen, my current employer, for the freedom provided in managing my time during the entire period of writing the second edition. Next to this, I acknowledge the ﬁnancial support oﬀered by several organizations (CAPES/BRANETEC grant 028/2011 and CNPq grants 479070/2013-0 and 202535/2011-8, Brazil; and ANCS grant PN-II-RU-TE-20113-0249, Romania).
Besides transparency, blending can be used to obtain many other graphical eﬀects that are useful in visualization applications. Volume visualization, described in Chapter 10, fundamentally relies on blending to display volumetric datasets. 6, for the construction of animated ﬂow textures for visualizing vector ﬁelds. 6. 5, for the computation of distance ﬁelds in image data. 6 Viewing All images of our height plot shown so far display the plot as viewed from a certain angle and position in space.