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• Easiest Way to Get Started With 3D?

  - by ryebread761

  I'm looking at getting into 3D game development and am wondering what would be the best, quickest engine to get started with. I need to be able to develop on a Macintosh with it. I know Java, and PHP mainly but have worked in many others. At this point, I feel I can adapt to most languages quite easy. So the programming language doesn't really matter to me. I've sorta kinda tried unity in the past and wasn't all too fond of it, so it's kind of a "I can't find anything better" resort. I'm hoping with how open I am I will find something I like more. Thanks in advance.

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• How to work with edge Texture

  - by XzenTorXz

  Im not sure if i use the right terms, but im not able to find something to start with. Im trying to develop a little HTML5 game. I have a ground with a texture and now I want to make a surrounding texture. The texture is an image wich should be bend around the ground. At the moment im using easelJS for display my images/textures. So im looking for some sort of Tutorial/Script/Advice. Im not even sure if I can bend a image in javascript. So the worst case I can think of is split the image in 100 pieces and then put it back together and rotate each piece. for example like this:

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• Creating several instances of the same object, and selecting only one

  - by hustlerinc

  I'm playing around with making a puzzle game, haven't done that much before I run into my first problem. Basically, I want to create a certain amount of the same object/function. But without hardcoding the different instances. I think maybe an array is a good idea? and then a for loop to push the objects in? And then I need to be able to select one of these objects by clicking on it, how would I do that? How do I know which ball in the array was clicked? A loop again? I made a jsFiddle example (you need to click the orange ball to select, then you can move it around by clicking the canvas). This is what I want to do, but with more balls. How would you solve this? Help appreciated.

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• Cocos2d iOS A* Star Path finding help

  - by user32581

  Hello I need help implementing this class https://github.com/sqlboy/tiled-games/tree/master/src into my iOS game. Im using the suggested code of: AStarPathFinder pathFinder = [[AStarPathFinder alloc] initWithTileMap:tileMap collideLayer:@"collide"]; // Optionally, you can set the name of the collide property key and the value it expects. [pathFinder setCollideKey:@"collidable"] // defaults to COLLIDE [pathFinder setCollideValue:@"True"] // defaults to 1 // highlight a path (src and dst are tile coorindates) [pathFinder highlightPathFrom:srcTile to:dstTile]; // move a sprite [pathFinder moveSprite:player from:srcTile to:dstTile atSpeed:0.1f]; I get the following error: Instance method '-initWithTileMap:collideLayer:' not found (return defaults to 'id') This is the official post for the class: http://www.cocos2d-iphone.org/forums/topic/just-pushed-a-cctmxtiledmap-a-pathfinding-class-to-github/ The only other code I added was: #import "AStarPathFinder.h" I think I am perhaps missing something! I am grateful for any help!

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• How much isometric sprites can one optimize by mirroring and alike?

  - by Tom

  I am working on a basic isometric game, and am struggling to find the correct mirrors. I have managed to get SE out of SW, by scaling the sprite on X axis by -1. Same applies for NE angle. Something is bugging me, that I should be able to also mirror N to S, but I cannot manage to pull this one off. Am I just too sleepy and trying to do the impossible, or a basic -1 scale on Y axis is not enough? What are the common used mirror table for optimizing 8 angle (N, NE, E, SE, S, SW, W, NW) isometric sprites?

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• pygame.Rect around circle

  - by geekkid

  I'm trying to make a pong game in pygame , but i can't figure out how to but a ball circle , which i can create with pygame.draw.circle into a pygame.Rect object so i can use the colliderect function and manipulate the ball's position. For example, with rectangles, i can do something like this : rect = pygame.Rect(255, 255, 100, 100) pygame.draw.rect(screen, yellow, rect) and then when i change the pygame.Rect object position , the drawing primitives position also changes. How can the same effect be achieved when i want to draw a circle, instead of a rectangle? Thank you.

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• Getting collision detection in Pygames

  - by user36010

  I am writing a game in Pygame, I want to get collision detection. The aim is when a object hits another, the target object disappears. I want to avoid having classes and just have my code class less for now, in one script. This makes it difficult to get collision detection because the Rect method in Pygame is called on by an object(class). The logic I want to achieve is: object hits a target object target object disappears. is there an easy way to achieve this?(with minimal code possible)

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• Is OpenGL 1.x deprecated?

  - by QuasarDonkey

  I'm familiar with OpenGL 1.x. I typically use SDL with OpenGL 1.4 on Linux, and I've never run into problems, even on my modern system. I've read on the OpenGL site about deprecation and compatibility contexts, but I'm still unclear as to whether it's safe to continue to use old versions of OpenGL, as opposed to using old features in newer versions. When functionality is marked deprecated ... future versions of OpenGL may remove it. Does deprecation simply imply that those functions can't be used alongside newer features? More specifically, are there any systems today (other than embedded) where OpenGL 1.x isn't available? The old-skool stuff like, glBegin, glEnd, glDrawPixels, etc. Note: I'm not a professional games developer, so you'll have to excuse my ignorance. I'm working on a mostly 2D game that I would like to keep multi-platform, supporting at least Linux, Mac, and Windows.

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• XNA 2D Rotated Rectangle Collision Response

  - by Kyle Uithoven

  I am using Rotated Rectangles which collide using the Separating Axis Theorem and they work perfectly fine for collision detection using Intersects and Contains. However, I am starting to use faster objects in my game now and there is the issue of the two object overlapping during collision due to their higher velocities. I would like to do a collision response where I find out how much they are overlapping in the X and Y and put position them outside of each other. I would like to use something like this: http://go.colorize.net/xna/2d_collision_response_xna/index.html. But I am having some issues trying to adapt this to handle the rotation of the bounds. Is this possible? Are there any resources out there that I can look at?

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• Options for 2D Web/iPhone/Android, with Test Framework

  - by ashes999

  I would like to make a 2D game with one codebase that runs on iPhone, Android, and web (any flavour of web -- HTML5, Flash, Silverlight, etc.) What are my options? I should be able to write my code once, and run it anywhere. I also absolutely need the ability to write unit tests (or write a unit-testing framework) -- I cannot make sizable games without testing. Unity is good, but unity is 3d; even with hacks, the graphical assets will still be 3d. I'm after 2d, not 3d. (If you need a Mac or separate licensing for the Mac part, that's okay.)

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• How to get several frequency ranges at the same time in fmod?

  - by Rootosaurus

  After reading documentation and tutorials about fmod I still have a question about frequency ranges. I've found how to get a frequency range using low and high pass DSP at the same time on the main channel, but I can't find how to get several ranges at the same time. For example I want, for a specific phase of my game, to hear range 400 to 600Hz and 1000 to 2000hz of the same sound. I tried to create a channel by range, but it doesn't seem to work (or maybe I do something wrong). How can I do that ? Thank you

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• How to find 2D grid cells swept by a moving circle?

  - by Nevermind

  I'm making a game based on a 2D grid, with some cells passable and some not. Dynamic objects can move continuously, independent of the grid, but need to collide with impassable cells. I wrote an algorithm to trace a ray against the grid, that gives me all cells that ray intersects. However, actual object are not point-sized; I'm currently representing them as circles. But I can't figure out an effective algorithm to trace a moving circle. Here's a picture of what I need: The numbers show in what order the circle collides with grid cells. Does anybody know the algorithm to find these collisions? Preferably in C#. Update The circle can be bigger than a single grid cell.

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• Effecient finding of long-range spotting targets

  - by nihohit

  I'm creating a top-down 2d strategy game, with a square grid map. So far, I've used Bresenham's line drawing algorithm in a circle to determine what's in LOS of each unit, and then targedt one of the targets in the circle. Now I find that this limits my units to shoot only at targets that they see. I want to extend my targeting algorithm to target any other unit in range of my weapon, even if they're out of sight range of this given unit, if they're "spotted" by another friendly unit. In other words, I want to enable usage of weapons with ranges longer than sight range. Is there a better way than iterating over all sighted units and computing range and LOSto each of them?

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• Nifty gui hide/show image

  - by Mario

  I have a simple screen made with Nifty gui. On this game screen I want to put a simple image controls sound: just on and not. So I have two images to switch and get music stop or run. Problem is: how can I hide/disply an image with nifty gui? Here my java code when player click on image: Screen screen = nifty.getCurrentScreen(); Element el = screen.findElementByName("iconOn"); el.setVisible(false); el = screen.findElementByName("iconOff"); el.setVisible(true); This code doesn't work :( Thanks to everyone could help me

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• libgdx - collision detection with tiled map java

  - by user2875021

  currently, I am working on a 2d rpg game which is similar to final fantasy 1-4. I can load up a tiled map and the sprite can walk freely on the map. However, I will like to create a wall for it to stop walking through it. I created three tiled layer Background, Collision, Overhead and one Collision object layer with rectangles only. "How do I handle collisions with the object layer in the tiled map?" "Do I have to create every single rectangle that is in the object layer with Rectangle rectangle = new Rectangle() and rectangle.set(x, y, width, height)in the code?" Thank you very much in advance. Any help is greatly appreciated!

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• When should I decide what language and platforms I will use for a project?

  - by Mikalichov

  During your development process, when is the recommended phase to decide what platform to aim for, and what language to use? I figured that it would be better to choose at the beginning what would be your target platform, as it would affect your design decisions, and limit the language you are supposed to use. However, I have heard several stories of people developing their game with whatever language they were the most confident with, and then porting it to the various platforms. So, what is the best moment to choose? Before, during, after? If there is not one best choice, what factors should affect the decision?

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• How to avoid movement speed stacking when multiple keys are pressed?

  - by eren_tetik

  I've started a new game which requires no mouse, thus leaving the movement up to the keyboard. I have tried to incorporate 8 directions; up, left, right, up-right and so on. However when I press more than one arrow key, the movement speed stacks (http://gfycat.com/CircularBewitchedBarebirdbat). How could I counteract this? Here is relevant part of my code: var speed : int = 5; function Update () { if(Input.GetKey(KeyCode.UpArrow)){ transform.Translate(Vector3.forward * speed * Time.deltaTime); } else if(Input.GetKey(KeyCode.UpArrow) && Input.GetKey(KeyCode.RightArrow)){ transform.Translate(Vector3.forward * speed * Time.deltaTime); } else if(Input.GetKey(KeyCode.UpArrow) && Input.GetKey(KeyCode.LeftArrow)){ transform.rotation = Quaternion.AngleAxis(315, Vector3.up); } if(Input.GetKey(KeyCode.DownArrow)){ transform.Translate(Vector3.forward * speed * Time.deltaTime); } }

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• General usage question of vbo

  - by CSharpie

  Firstofall, I am sorry if my question is to broad. I am developing a tile based game and switched from those gl.Begin calls to using VBOs. This is kind of working allready, I managed to render a hexagonal polygon with a simple shader applied. What I am not sure is, how to implement the "whole" tile concept. Concrete the questions are: - Is it better to create 1 VBO for a single tile and render it n-Times in every different position, or render one huge VBO that represents the whole "world" - Depending on the answer above, what is the best way to draw a "linegrid". Overlay with the same vbo using the respecting polygon.mode , or is there a way to let the shader to this? - How would frustum-culling or mousepicking work then, do i need to keep the VBO-data in memory?

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• Collision Detection within Player/Enemy Class

  - by user1264811

  I'm making a 2D platform game. Right now I'm just working on making a very generic Player class. I'm wondering if it would be more efficient/better practice to have an ActionListener within the Player class to detect collisions with Enemy objects (also have an ActionListener) or to handle all the collisions in the main world. Furthermore, I'm thinking ahead about how I will handle collisions with the platforms themselves. I've looked into the double boolean arrays to see which tiles players can go to and which they can't. I don't understand how to use this class and the player class at the same time. Thank you.

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• How can I acheive a smooth 2D lighting effect?

  - by Cyral

  I'm making a tile based game in XNA. So currently my lightning looks like this: How can I get it to look like this? Instead of each block having its own tint, it has a smooth overlay. I'm assuming some sort of shader, and to tell it the lighting and blur it some how. But im not an expert with shaders. My current lighting calculates the light, and then passes it to a spritebatch and draws with a color parameter. EDIT: No longer uses spritebatch tint, I was testing and now pass parameters to set the light values. But still looking for a way to smooth it.

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• Évolution : affichage des votes sur les résultats de recherches du forum Developpez, pour plus de pertinence et d'efficacité

  Bonsoir à tous, Voilà qui va faire plaisir à beaucoup de monde à mon avis : une fonctionnalité qui a été longtemps demandée a été mise en place ce soir ! Les résultats de la recherche en vue par message affichent désormais les votes positifs et négatifs reçus sur les messages en question ! Notez que ceci n'affecte pas l'affichage de la recherche par discussion qui reste inchangé. J'ai volontairement choisi une forme épurée et textuelle de l'affichage des votes. J'ai considéré l'ajout des boutons de votes, mais je pense qu'ils sont gros, qu'ils pollueraient plutôt l'affichage, et de toute façon je pense qu'il n'est pas pertinent de pouvoir ...

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• Creating an OpenGL FPS camera: I have the position and orientation vectors, now what?

  - by Synthetix

  I have been struggling to create a first person camera in OpenGL ES 2.0 without using gluLookAt(). I grab the camera's orientation vectors (the way it's looking) from the current modelview matrix, and use that to calculate the new forward/backward (Z) translation value. I then calculate the strafe (X) value from the dot product of Z and Y (which is always 1.0). So, I have all the information I need to create a view matrix, but how do I do that without using gluLookAt? Almost all the examples I've seen use gluLookAt, but no such function exists in OpenGL ES 2.0. Besides, one of the moderators on cprogramming.com mentioned that gluLookAt is not appropriate for FPS cameras: http://cboard.cprogramming.com/game-programming/135390-how-properly-move-strafe-yaw-pitch-camera-opengl-glut-using-glulookat.html I am really confused by all the conflicting information I'm getting. I just want to create a first person camera that goes forward (W,S keys), side-to-side (A,D keys) and rotates around its center (Y axis only), Wolfenstein style. Any help on this would be much appreciated!

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• Which version of OpenGL for Android?

  - by akadouri

  I've been trying to learn OpenGL ES 2.0 to create a simple 2D game. I bought a book on android development, but after seeing that the author uses his own SDK that implements OpenGL ES 1.0 I decided to just use online tutorials. I've been so lost trying to find out what to use. The Matrices and shaders of 2.0 confuse me and I can't find any tutorial that just explains how to texture map a simple 2D image. Basically: OpenGL ES 1.x or 2.0 for simple 2D with little OpenGL experience If 2.0 Any good tutorials for 2.0, I've found so many for 1.0

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• What's a good way to store a series of interconnected pipe and tank objects?

  - by mars

  I am working on a puzzle game with a 6 by 6 grid of storage tanks that are connected to up to 4 tanks adjacent to them via pipes. The gameplay is concerned with combining what's in a tank with an adjacent tank via the pipe than interconnects them. Right now I store the tanks in a 6x6 array, vertical pipes in a 5x6 array, and horizontal pipes in a 6x5 array. Each tank has a reference to the object that contains both tanks and pipes and when a pipe needs to be animated filling with liquid, the selected tank just calls a method on the container object telling it to animate the pipes it is connected to (subtract 1 from row or column to find connected pipes). This feels like the wrong way of doing it, as I've also considered just giving each tank references to the pipes connected to it to access directly.

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• I finished "Beginning Android Games", should I use its framework?

  - by orod

  I've worked through Mario Zechner's "Beginning Android Games" and have made my own pong and asteroids game using the framework used in the book. I have also downloaded the source code for Replica Island and am able to run that. I like Replica Island's framework over the one I made from reading the book. Some differences are that Replica Island uses different activities for each screen instead of Zechner's Screen class and that Replica Island can use a lot of textures and isn't limited to textures with dimensions of powers of 2. If I'm serious about writing games and apps for Android should I learn Replica Island's framework and use that instead of the one I made while reading Zechner's book?

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