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      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.


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  1. A few years ago I did this remake for Android and iOS but I never bothered to update them so they got removed from both markets. To be honest, it wasn't very popular on any market and the coding lacked support for different screen sizes. Trying out some new things and decided to put it up for free again on Google Play so some old AppleII/C64 nerds can remember how hard the game was :) This time all screen sizes are supported and I will fix the criticism in some of the feedback reviews I got when it was still published.  
  2. I'm sure that whatever language you are using (your code snippet can be several) there is a Rectangle implementation in the core API which has an intersects( anotherRectangle ) method?
  3. I would start by separating animation logic from the draw method into an update method. Secondly I would the make the animation logic framerate independant. As it is now it's written in a frame dependant way which causes the animation to look different depending on the speed of the machine.   I'll try to do some pseudo-code below to show how I do animation logic myself below.   // Animation frames ( can be used for longer intervalls of certain frames as shown using the frame 4 more than the others ). private int[] animationSequence = { 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 4, 4, 4, 3, 3, 2, 2 }; // Animation framerate. private float animationFramerate = animationSequence.length / 1000F; private int currentFrame = 0;     public void update( long ms ) {   currentFrame += ms * animationFramerate;  if( currentFrame > animationSequence.length ) { currentFrame %= animationSequence.length; } }     Thats pretty much it for the lazy-mans version. There are some fixes which could be made for even better synchronization. Thats by adding logic which can handle "half" frames. You can then use a variable for time spillover, i.e. when you show frame N and you still have som time left on that frame before moving into the next one.    In the above code, there are two ways to tweek your animation speed. One is to change the value of 1000F to either a higher value (slows down the animation) or vice versa for a faster one OR you can alter the animation sequence to have more frames of the same index in a row. When it comes to the rendering part you have two options as well. Either treat the index value in the sequence as an Image in your array or my preferred choice an offset in a sprite-sheet.
  4. Seems you start and set the game running (basically an eternity loop until members isLooping && isRunning is set to false) from the onMouseClick. OnMouseClick is probably called by some thread in Swings complex thred/event handling mechanism and you freeze it with your game loop.    I would suggest that in event callback methods called by Swing you just set flags which hits the Game class what to do and then handle those flags in the main game loop instead.
  5. Hi,   How do you "usually" handle to option in a game to toggle music on/off. Do you load/unload the sounds or do you load all sounds on startup and just toggle the volume between mute/unmute to save load time and potential lag?   // Jonas