Interactive Graphics using Javascript, HTML5 and CSS3
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This document provides an overview of interactive graphics using Javascript, HTML5 and CSS3. It introduces the speaker and covers topics like animation, interaction, sound, keyboard movement and collision detection. Code snippets and examples are provided to demonstrate concepts like animation using setInterval, coordinate systems, and playing sound. Labs are also outlined to build simple animations and games.
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- 1. While your waiting... • You will want to get: • https://github.com/MacBoyPro/ simple_animation • git@github.com:MacBoyPro/ simple_animation.git
- 2. Interactive Graphics w/ Javascript, HTML5 and CSS3 Lee Lundrigan
- 3. Who am I? • Employer: Blazing Cloud, Inc. • Job: Software Engineer • Languages: HTML, CSS, Javascript, Ruby, Objective-C, Java • Gold star • Wrote a cross mobile browser CSS framework that ran on iPhone, Android, Blackberry and WinMo
- 4. Who are YOU?
- 5. Tools of the trade • Oxygen XML Editor • http://www.oxygenxml.com • Aptana • http://www.aptana.com • TextEdit (on Mac) • TextPad (on Windows)
- 6. Course Topics • Animation • 2D and 3D / HTML5 Canvas • Collision detection • Sprites • Sound • Interaction • Best practices
- 7. Vocab vec·tor /ˈvektər/ Noun: A quantity having direction as well as magnitude, esp. as determining the position of one point in space relative to another. 10 15
- 8. hertz (Hz) a unit of frequency of one cycle per second. Ex. 60Hz = 60 times per second ’tween/twēn/ Contraction: time between. The process of creating in between frames.
- 9. Coordinate System • Cartesian Coordinate System • Starts in upper left • Origin is (0,0) 0 0
- 10. Animation • setInterval(code,millisec); • repeats until cleared • setTimeout(code, millisec); • Fires the event once • Note: There are 1000 milliseconds in one second.
- 11. Animation Cont... function draw() { ball.x += 10; }
- 12. Lab - Simple Animation
- 13. Collision Detection • Bounding box • Test using object’s center • {x: 10, y: 10}
- 14. Sound • HTML5 <embed> Tag <embed src="pong.mp3" id=”pong ”width=”0” height=”0” autostart=”false”/> • Get the object by id • Call the Play() method
- 15. Keyboard Movement • document.onkeydown • detect character code • left: 37 right: 39 • set moving true • document.onkeyup • set moving false
- 16. Keyboard Movement Cont... • Webkit based browsers have a bug • the keypress event doesn’t work for the arrow keys
- 17. Lab - Game time