Make Getting Started with Processing.py by Allison Parrish

By Allison Parrish

Processing spread out the realm of programming to artists, designers, educators, and newcomers. The Processing.py Python implementation of Processing reinterprets it for todays net. This brief ebook lightly introduces the center options of computing device programming and dealing with Processing. Written by means of the co-founders of the Processing venture, Reas and Fry, besides co-author Allison Parrish, Getting all started with Processing.py is your quickly tune to utilizing Pythons Processing mode.

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In Example 4-13 on page 44, the ellipses shrink with each new row and are moved to the right by adding the y coordinate to the x coordinate. 0) Robot 2: Variables The variables introduced in this program make the code look more difficult than Robot 1 (see “Robot 1: Draw” on page 31), but now it’s much easier to modify, because numbers that depend on one another are in a single location. For instance, the neck can be drawn based on the bodyHeight variable. The group of variables at the top of the code control the aspects of the robot that we want to change: location, body height, and neck height.

14159). Figure 3-2 shows the relationship between radians and degrees. As featured in this example, four radian values are used so frequently that special names for them were added as a part of Processing. The values PI, QUARTER_PI, HALF_PI, and TWO_PI can be used to replace the radian values for 180°, 45°, 90°, and 360°. Figure 3-2. Radians and degrees are two ways to measure an angle. 28. Example 3-8: Draw with Degrees If you prefer to use degree measurements, you can convert to radians with the radians() function.

The value 0 defines the color as entirely transparent (it won’t display), the value 255 is entirely opaque, and the values between these extremes cause the colors to mix on screen: size(480, 120) noStroke() background(204, 226, 225) # Light blue color fill(255, 0, 0, 160) # Red color ellipse(132, 82, 200, 200) # Red circle fill(0, 255, 0, 160) # Green color ellipse(228, −16, 200, 200) # Green circle 27 fill(0, 0, 255, 160) # Blue color ellipse(268, 118, 200, 200) # Blue circle Custom Shapes You’re not limited to using these basic geometric shapes—you can also define new shapes by connecting a series of points.

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