By Harrison Kinsley
Methods to create compelling video games utilizing Python and the PyGame video games improvement library. starting Python video games improvement, 2d variation will educate you ways to create visuals, do occasion dealing with, create 3D video games, upload media parts, and combine OpenGL into your Python online game. during this replace to the 1st ever publication to hide the preferred open resource PyGame video games improvement library, you will stand to achieve invaluable technical insights and stick with besides the construction of a real-world, freely downloadable online game. Written through veterans and Python specialists Will McGugan and Harrison Kinsley, it is a entire, useful creation to video games improvement in Python. it's also possible to capitalize upon various counsel and tips the authors have gathered over their careers developing video games for many of the world's biggest online game builders.
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Additional info for Beginning Python Games Development, 2nd Edition: With PyGame
They contain these three values: • buttons—A tuple of three numbers that correspond to the buttons on the mouse. So buttons is the left mouse button, buttons is the middle button (like a mouse wheel), and buttons is the right button. If the button is pressed, then its value is set to 1; if it is not pressed, the value will be 0. Multiple buttons can be pressed at once. • pos—A tuple containing the position of the mouse when the event was generated. • rel—A tuple containing the distance the mouse has moved since the last mouse motion event (sometimes called the mouse mickies).
Take your finger off the cursor key and the background will stop moving. Listing 3-3. update() Listing 3-3 begins just like Hello World; it imports and initializes Pygame, then loads a background image. The event loop in this script is different, because it handles KEYDOWN and KEYUP. These key events both contain the same three values: • key—This is a number representing the key that was pressed or released. Each physical key on the keyboard has a constant that begins with K_. The alphabet keys are K_a through K_z, but there are also constants for all the other keys, such as K_SPACE and K_RETURN.
This is a particular problem on desktop computers that do a lot of work in the background, and may occasionally pause your game for a brief amount of time. get_pos(). If you were using mouse movement to drive a tank and the buttons to fire, it would be better to work with events so that the game can more closely monitor what the player has been doing. Figure 3-2. info Chapter 3 ■ Introducing Pygame Handling Mouse Motion Events As you have seen, MOUSEMOTION events are issued whenever you move the mouse over the Pygame window.