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Example 5-3: Global Variable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Follow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Example 5-4: Track the Mouse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Example 5-5: The Dot Follows You. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Example 5-6: Draw Continuously. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Example 5-7: Set Line Thickness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Example 5-8: Easing Does It. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Example 5-9: Smooth Lines with Easing. . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Click. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Example 5-10: Click the Mouse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Example 5-11: Detect When Not Clicked. . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Example 5-12: Multiple Mouse Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Example 5-13: Find the Cursor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Example 5-14: The Bounds of a Circle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Example 5-15: The Bounds of a Rectangle. . . . . . . . . . . . . . . . . . . . . . . . . 64 Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Example 5-16: Tap a Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Example 5-17: Draw Some Letters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Example 5-18: Check for Specific Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Example 5-19: Move with Arrow Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Example 5-20: Map Values to a Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Example 5-21: Map with the map() Function. . . . . . . . . . . . . . . . . . . . . . . . 71 Robot 3: Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 6/Translate, Rotate, Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Translate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Example 6-1: Translating Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Example 6-2: Multiple Translations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Rotate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Example 6-3: Corner Rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Example 6-4: Center Rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Example 6-5: Translation, then Rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Example 6-6: Rotation, Then Translation. . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Example 6-7: An Articulating Arm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Example 6-8: Scaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Example 6-9: Keeping Strokes Consistent. . . . . . . . . . . . . . . . . . . . . . . . . . 83 Push and Pop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Example 6-10: Isolating Transformations. . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Robot 4: Translate, Rotate, Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Contents vii
7/Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 Images. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Example 7-1: Load an Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Example 7-2: Load More Images. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Example 7-3: Mousing Around with Images. . . . . . . . . . . . . . . . . . . . . . . . . 92 Example 7-4: Transparency with a GIF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Example 7-5: Transparency with a PNG. . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Fonts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Example 7-6: Drawing with Fonts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Example 7-7: Draw Text in a Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Example 7-8: Store Text in a String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Shapes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Example 7-9: Draw with Shapes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Example 7-10: Scaling Shapes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Example 7-11: Creating a New Shape. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 Robot 5: Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 8/Motion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Example 8-1: See the Frame Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Example 8-2: Set the Frame Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Speed and Direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Example 8-3: Move a Shape. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Example 8-4: Wrap Around. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Example 8-5: Bounce Off the Wall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 Tweening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Example 8-6: Calculate Tween Positions. . . . . . . . . . . . . . . . . . . . . . . . . . 108 Random. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Example 8-7: Generate Random Values. . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Example 8-8: Draw Randomly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Example 8-9: Move Shapes Randomly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Example 8-10: Time Passes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Example 8-11: Triggering Timed Events. . . . . . . . . . . . . . . . . . . . . . . . . . 112 Circular. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 Example 8-12: Sine Wave Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 Example 8-13: Sine Wave Movement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 Example 8-14: Circular Motion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Example 8-15: Spirals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Robot 6: Motion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 viii Contents <strong>www</strong>.<strong>ebook777.com</strong>
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