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• What's the best way to start up a opengl context in my setup?

  - by NoobScratcher

  Would it be better to create a callback function which contains a OpenGL 3.0+ Context including viewport, matrix, etc or setup OpenGL in a function called GL_StartUp and use that GL_StartUp Function in the mainloop and callback function to that Function. I want my program to only show a OpenGL default scene when the user clicks on the New Game menu item in the menu bar rather then just have one setup when the program starts. I'm using Ubuntu 64bit, GTK 3.0 and GTK OpenGL

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• Pre-rendered fire. Where to find? [on hold]

  - by Vladivarius

  I'm studying game programming. I haven't yet implemented generated fire rendering in my ,,engine'' so I'm looking for some pre-rendered fire textures for early demo-scenes, but they seems strangely difficult to find. I'm currently using some that I ripped from DMC but I want to try out different ones. Does anyone know where to find these? Software that could generate them would also be ok. Thanks :)

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• What are some of the more commonly used projectile rendering techniques?

  - by KlashnikovKid

  couldn't find a duplicate question (bit surprising to me) but anywho I'm starting to get near implementing the rendering of projectiles for my game. My question is what are some good techniques for efficiently rendering projectiles? I would like emphasis on techniques that leave room for the projectiles to be "rich" and dynamic (Cool to look at!) I'm also using DX11 for my rendering engine so bleeding edge techniques that can make use of that would be much appreciated too. Thanks!

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• Drawing "Stenciled" Sprites and making them glow

  - by Code Assassin

  Currently, in my game - I'm not using XNA's SpriteBatch to render anything(I am using Farseer Physic's Debug View), and I was wondering how I would render something like this: only using XNA. My second question is once I have drawn these stenciled sprites , how would I give the "stenciled" lines a glow effect like so: I haven't done anything like this before so It is a very confusing experience for me. Any pointers?

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• How to calculate direction from initial point and another point?

  - by Dvole

  I'm making a simple game where I shoot things from a certain point on screen (A). I tap the screen and shoot the projectile from initial point(A) to the tap point(B). But I want the projectile to move along the same path instead and fly out of bounds of the screen. How do I calculate a point that is on the same line that these two points, but further away? This is a simple math, but I can't figure it out.

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• Calculating missile trajectory around orbits before shooting [closed]

  - by Onofrio

  Possible Duplicate: Calculating missile trajectory around orbits before shooting I'm building a game with Unity3D. It's a Gravity Wars clone. Both player and AI turrets shoot missiles at each other (giving an Angle and a Power variables), trying not to crash missiles on planets. But here's my question: how do I make AI calculate power and angle before shooting his missile, considering a planet's gravity too?

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• Change density of the body dynamically

  - by Siddharth

  In my game, I want to change density of my body object when it collide with other objects. I found something like following to change density but further I could not able to find any hint for this. So someone please help. Fixture fixture = goldenBoxArrayList.get(i) .getGoldenBoxBody() .getFixtureList().get(0); fixture.setDensity(0.5f); After setting fixture data I could not able to set it to the body.

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• Time development vs production values

  - by Pier

  I have to choose between a framework I already know (Adobe Air), and a framework I know nothing about but is more powerful (Unity). I can do the mobile game I have in mind with both platforms, but the quality of the graphics and development time would be quite different. From an indie mobile perspective, are more detailed graphics justifiable commercially? Is there any objective study that throws some solid conclusions about that?

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• How to get a Read-Write Reference to Parent GameObject from a script component attached to it?

  - by onguarde

  I have a game object(object) with a script component(myscript) attached. I have a reference to myscript component through getComponent, and I want to change the transform of the gameObject the script is attached to. myscript.gameObject.transform = (new value); The above code gives me error, Property 'UnityEngine.GameObject.transform' is read only. Is there a way to get a read-write version?

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• Confusing Callbacks

  - by SullY

  I'm trying to programm now a "game", and started with the EmptyProject that's provided by the DirectX SDK. The problem is that the Callbacks are confusing me. Can please someone explain me? Edit: DXUTSetCallbackD3D9DeviceAcceptable( IsD3D9DeviceAcceptable ); // not sure but I think that's the caps? DXUTSetCallbackD3D9DeviceLost( OnD3D9LostDevice ); DXUTSetCallbackDeviceChanging( ModifyDeviceSettings ); DXUTSetCallbackFrameMove( OnFrameMove );

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• Confusing box2d forces

  - by Diken

  Hello Friends. This is my demo game screen-shoot. Here i am using three buttons. Right-bottom button is used for jump and left-bottom buttons used for move left and right. I have some questions 1) should i use linearImpuls for jump body?? 2) For move right and left which types of force i applied??? PLease tell me i am confusing to use linearImpuls, applyforce and linearVelocity. Thanks in advance

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• Where can I find free simple 3D models? [duplicate]

  - by fibo-Nacci

  This question is an exact duplicate of: What are good sites that provide free media resources for hobby game development? [closed] I'm learning OpenGL. Unfortunately can't create 3D models, but I would like to write some really simple games, to improve my programming skills. I need some really basic .obj file, which has one bmp, or jpeg texture. Where can I download some for free? Thanks in advance,

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• How to pause and unpause the Particular action of a sprite?

  - by user1609578

  My game has a sprite representing a character. When the character picks up an item, the sprite should stop moving for a period of time. I use CCbezier to make the sprite move, like this: sprite->runaction(x) Now I want the sprite to stop its current action (moving) and later resume it. I can make the sprite stop by using: sprite->stopaction(x) but if I do that, I can't resume the movement. How can I do that?

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• Rendering projectiles with DirectX and C++

  - by Chris

  I'm working on a simple game that has the user control a space ship that shoots small circular projectiles. However, I'm not sure how to render these. Right now I know how to make a LPDIREC3DSURFACE for a sprite and render it onto a LPDIRECT3DDEVICE9, but that's only for a single sprite. I assume I don't need to constantly create new surfaces and devices. How should projectile generation/rendering be handled? Thanks in advance.

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• How can I plot a radius of all reachable points with pathfinding for a Mob (XNA)?

  - by PugWrath

  I am designing a tactical turn based game. The maps are 2d, but do have varying level-layers and blocking objects/terrain. I'm looking for an algorithm for pathfinding which will allow me to show an opaque shape representing all of the possible max-distance pixels that a mob can move to, knowing the mob's max pixel distance. Any thoughts on this, or do I just need to write a good pathfinding algorithm and use it to find the cutoff points for any direction in which an obstacle exists?

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• Existent js libs for tileset / map loading and rendering?

  - by ylluminate

  I'm building an rts style overhead tileset game with JavaScript (particularly using Ember.js framework as a base). The map is so large that I'd very much like to be able to load and render the board and layered items in a Google Maps'esque. I'm curious as to whether there are existing libs that would be helpful and already well thought out in these regards vs trying to reinvent the wheel. Are there any such libraries or code examples that would be useful in this area of board / map management?

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• Modular spaceship control

  - by SSS

  I am developing a physics based game with spaceships. A spaceship is constructed from circles connected by joints. Some of the circles have engines attached. Engines can rotate around the center of circle and create thrust. I want to be able to move the ship in a direction or rotate around a point by setting the rotation and thrust for each of the ship's engines. How can I find the rotation and thrust needed for each engine to achieve this?

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• Are there specific benefits to using XNA for 2D development if you don't plan on releasing on xbox/windows phone?

  - by ssb

  I've been using XNA for a while to tinker with 2D game development, but I can't help but feel constrained by the content pipeline when targeting PC only. Things like no vector fonts or direct use of graphics files make it a pain while other frameworks do these things with no problem. I like XNA because it's robust and has a lot of support, but what are the specific benefits that I'd get developing exclusively for PC, if there are any at all?

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• XNA - Detect click on triangle/circle form of a texture

  - by chr1s89

  How can i detect clicks on a texture (will be a button in my game) that has a form of a triangle or circle. I know only the rectangle solution where u can use the positions + the width/height but this dont work for that because clicks will be detected at the transparent pixels. I heard of pixel-perfect collision is it the right way for this? It would be great if someone can give me a example for such a solution or other.

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• How to pause and unpause the animation of a sprite?

  - by user1609578

  My game has a sprite representing a character. When the character picks up an item, the sprite should stop moving for a period of time. I use CCbezier to make the sprite move, like this: sprite->runaction(x) Now I want the sprite to stop its current action (moving) and later resume it. I can make the sprite stop by using: sprite->stopaction(x) but if I do that, I can't resume the movement. How can I do that?

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• How can a pygame image be colored?

  - by Juicy

  I'm writing a 2d particle system for a game in Pygame[1]. For the particles, I have an image surface loaded from a file -- basically a white primitive drawn over a transparent background. I'd like the particle engine to emit variously colored particles, but I'm not sure how to tell Pygame to color the surface. I've looked through what passes for documentation, but I'm having trouble finding anything. [1] Yeah, I don't really like Pygame, but my course insists I write this project in Python.

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• Saving files with libgdx

  - by Rudy_TM

  Writing my game in libgdx, i arrived at the point when i need to save the player stats and the info of the levels, but in libgdx its not allowed to write the file inside folder of the application, only external (in the sd) is allowed, well, the point is that i want that my new file cat be seen by anyone, or if they see it how can i pass it to a binary file, so no one can see it. I just want to hide the file :P

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• XNA - How do I change the texture of a 2D object?

  - by Adorjan

  I am on to make a table game, I successfully figured out how to make the arraw and to move the cursor on it (by tiles). Now I wanna find out how to make that if I hit the Enter key the tile's texture change to another. I tryed like this: if (input.KeyPressed(Keys.Enter)) { cell[X,Y].Cell_texture = tile_texture; } but it doesn't really work. Hope you can help. :) Thanks!

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• How do I split a texture into differently shaped pieces with libgdx?

  - by VictorB

  I want to split a texture into variously shaped pieces with libgdx, like the pieces of a puzzle game. TextureRegion.split() is not an option, as it splits into equally sized rectangular texture regions. The "Similar Questions" section here is helpful (particularly this question How do I break an image into 6 or 8 pieces of different shapes?), but I'm not sure yet if it's possible to implement the solution with libgdx. Any pointers?

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• setting the position in different resolution

  - by Moaz

  I have a normal game window which is 640*480, and everything is fine, but when I try to maximize the window, the objects translate to different positions on the screen, for example If I have a circle which is drawn at the center in the normal window, when I try to maximize it, it shifts away from the center of the screen. How do I adjust it so it draws at the center in both normal window and maximized window ?

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