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Hands-On Game Development with WebAssembly

You're reading from   Hands-On Game Development with WebAssembly Learn WebAssembly C++ programming by building a retro space game

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781838644659
Length 596 pages
Edition 1st Edition
Languages
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Author (1):
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Rick Battagline Rick Battagline
Author Profile Icon Rick Battagline
Rick Battagline
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Table of Contents (18) Chapters Close

Preface 1. Introduction to WebAssembly and Emscripten FREE CHAPTER 2. HTML5 and WebAssembly 3. Introduction to WebGL 4. Sprite Animations in WebAssembly with SDL 5. Keyboard Input 6. Game Objects and the Game Loop 7. Collision Detection 8. Basic Particle System 9. Improved Particle Systems 10. AI and Steering Behaviors 11. Designing a 2D Camera 12. Sound FX 13. Game Physics 14. UI and Mouse Input 15. Shaders and 2D Lighting 16. Debugging and Optimization 17. Other Books You May Enjoy

The simple particle emitter tool

Now that we have created a simple web app that can upload a PNG image file to the WebAssembly virtual file system, and an SVG chart to display the emission direction of the particles, we are going to add a simple particle system configuration tool. For this first version of our particle system configuration tool, we are going to keep the number of configurable values small. Later, we will add more features to our particle system tool, but for the moment this is the list of parameters we will be able to use to configure a particle emitter:

  • Image file
  • Minimum emission angle
  • Maximum emission angle
  • Maximum particles
  • Particle lifetime in milliseconds
  • Particle acceleration (or deceleration)
  • Alpha fade (will the particles fade out over time?)
  • Emission rate (number of particles to emit per second)
  • X position (emitter x coordinate)
  • Y position (emitter...
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