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ellipses and rectangles, respectively; later in the book, we’ll cover imageMode() and shapeMode(). Example 3-14: On the Corner By default, the ellipse() function uses its first two parameters as the x and y coordinate of the center and the third and fourth parameters as the width and height. After ellipseMode(CORNER) is run in a sketch, the first two parameters to ellipse() then define the position of the upper-left corner of the rectangle the ellipse is inscribed within. This makes the ellipse() function behave more like rect() as seen in this example: size(480, 120); rect(120, 60, 80, 80); ellipse(120, 60, 80, 80); ellipseMode(CORNER); rect(280, 20, 80, 80); ellipse(280, 20, 80, 80); You’ll find these “mode” functions in examples throughout the book. There are more options for how to use them in the Processing Reference. Color All the shapes so far have been filled white with black outlines, and the background of the Display Window has been light gray. To change them, use the background(), fill(), and stroke() functions. The values of the parameters are in the range of 0 to 255, where 255 is white, 128 is medium gray, and 0 is black. Figure 3-3 shows how the values from 0 to 255 map to different gray levels. Draw 23
Figure 3-3. Colors are created by defining RGB (red, green, blue) values 24 Getting Started with Processing <strong>www</strong>.<strong>ebook777.com</strong>
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Figure 8-2. A sine wave is created
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Figure 10-2. Code can be split into
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program has many bugs, you’ll nee
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Style Processing is flexible about
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There are more data types than thos
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drawing, 9 circular motion, 113-116
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lowercase/uppercase letters in code
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Text Editor, 8 textSize ( ) functio
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