Download Getting Started with Processing by Casey Reas, Ben Fry PDF

By Casey Reas, Ben Fry

Research computing device programming the simple means with Processing, an easy language that permits you to use code to create drawings, animation, and interactive photos. Programming classes often begin with conception, yet this publication permits you to bounce correct into artistic and enjoyable initiatives. It's perfect for a person who desires to research easy programming, and serves as an easy creation to pics for individuals with a few programming talents.

Written through the founders of Processing, this e-book takes you thru the educational strategy one step at a time that can assist you grab middle programming thoughts. You'll how to comic strip with code -- making a application with one a line of code, staring at the outcome, after which including to it. subscribe to the hundreds of thousands of hobbyists, scholars, and execs who've came upon this loose and academic neighborhood platform.
* fast examine programming fundamentals, from variables to things
* comprehend the basics of special effects
* Get familiar with the Processing software program improvement surroundings
* Create interactive photos with easy-to-follow initiatives
* Use the Arduino open resource prototyping platform to regulate your Processing pictures

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Some calculations are used so frequently in programming that shortcuts have been developed; it’s always nice to save a few keystrokes. For instance, you can add to a variable, or subtract from it, with a single operator: x += 10; // This is the same as x = x + 10 y -= 15; // This is the same as y = y - 15 It’s also common to add or subtract 1 from a variable, so shortcuts exist for this as well. The ++ and –– operators do this: x++; // This is the same as x = x + 1 y--; // This is the same as y = y - 1 More shortcuts can be found in the reference.

Example 3-18: Draw an Arrow The beginShape() function signals the start of a new shape. The vertex() function is used to define each pair of x- and y-coordinates for the shape. Finally, endShape() is called to signal that the shape is finished. size(480, 120); beginShape(); vertex(180, 82); vertex(207, 36); vertex(214, 63); vertex(407, 11); vertex(412, 30); vertex(219, 82); vertex(226, 109); endShape(); 30 Getting Started with Processing From library of Wow! eBook From library of Wow! eBook Example 3-19: Close the Gap When you run Example 3-18, you’ll see the first and last point are not connected.

So, for instance, I might be trying to find just the right red for an ellipse: size(200, 200); fill(165, 57, 57); ellipse(100, 100, 80, 80); Now suppose I want to try a different red, but don’t want to lose the old one. I can copy and paste the line, make a change, and then “comment out” the old one: size(200, 200); //fill(165, 57, 57); fill(144, 39, 39); ellipse(100, 100, 80, 80); Placing // at the beginning of the line temporarily disables it. Or I can remove the // and place it in front of the other line if I want to try it again: size(200, 200); fill(165, 57, 57); //fill(144, 39, 39); ellipse(100, 100, 80, 80); NOTE: As a shortcut, you can also use Ctrl-/ (Cmd-/ on the Mac) to add or remove comments from the current line or a selected block of text.

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