Simple DirectMedia Layer (SDL) is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.

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Can I create relative filepaths to images in an XCode SDL project?

Can I create relative filepaths to images in an XCode SDL project? I have to use absolute filepaths as it is, but it would be much easier if I could make the filepaths relative.
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1answer
485 views

SDL2 sprite batching and texture atlases

I have been programming a 2D game in C++, using the SDL2 graphics API for rendering. My game concept currently features effects that could result in even tens of thousands of sprites being drawn ...
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0answers
21 views

Issue setting a MonoGame project from scratch on linux [closed]

I'm using monodevelop 5.1, along with MonoGame 3.2. This is all in Ubuntu 14.04. Since I wasn't able to add the MonoGame template to monodevelop (maybe because my mono runtime has been compiled from ...
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1answer
95 views

What is missing from SDL for it to gain more widespread adoption? [closed]

As I understand, SDL offers abstractions that let you make windows, handle input and audio much easier than doing so directly with the low level APIs provided by several operating systems. However, ...
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1answer
24 views

SDL render to a texture

I am trying to create a button for my game there are lots of similar buttons so using an image for each one is a bit inefficient. So I want to load an image then copy some text over it and render that ...
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1answer
17 views

SDL2_ttf gradient

I want to render some text using a gradient instead of a solid color, but I can't figure out how to. I first load a gradient like this: SDL_Surface* gradient = IMG_Load("blue-cian.png"); then I ...
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2answers
25 views

Is it possible to use an image, sound or font without importing them externally? [SDL2]

It's hard to explain my question, but I will try my best. When loading sounds, images or fonts in SDL2 (with SDL_image, SDL_mixer, SDL_ttf) you need to load them from an external source path. For ...
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1answer
49 views

Is SDL2 alone capable of dynamic (or deferred) lighting? [closed]

I'm talking about JUST SDL2, not OpenGL or DirectX. Would drawing deferred lighting bulk the CPU up and how would it be done?
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3answers
236 views

sdl: unlock mouse in fullscreen mode and make it useable on another monitor

Is it possible to unlock the mouse in fullscreen mode so that you can use it on a another monitor? I read trough the SDL documentation, but I couldn't find anything related to my problem.
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2answers
124 views

Should I cap the frame rate in SDL?

I know this question has been asked a lot, but I never found an answer suitable for me. I have a game with a fairly big logic system and the movement system I am currently using is calling ...
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1answer
39 views

Scaling an SDL Surface

I want to create a button for a game's UI. The background uses a gradient and then I blit a surface on top of the gradient and use SDL_SetColorKey to delete the unwanted pixels. The surfaces are not ...
2
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0answers
26 views

SDL_AddTimer + SDL_GL_MakeCurrent not working on Windows

I'm messing around with C++, OpenGL and SDL doing a game that should be able to run in Windows and Mac OS X. I have a problem that only happens on Windows. Let me describe the scenario. First I ...
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0answers
61 views

Tile Collision - subtracting a minor value to the box size

I'm having a certain problem when doing collision checks on bounding boxes that have their edges aligned with upper or right tiles. It shouldn't count as an intersection but I don't know a good ...
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1answer
28 views

SDL Surface clipping mask

I am creating a GUI for my game, so I use some buttons like . So you can see it is only text surrounded by a rectangle. But I currently use a huge png image with all the buttons I need arranged as I ...
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4answers
235 views

SDL zooming/upscaling without images becoming blurry?

I'm working on a game with 32px tiles and I have one question regarding this and scaling. When I try to see my game fullscreen my image just becomes blurry. I remember playing NES games and when the ...
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1answer
34 views

Accelerated Motion

I'm making a menu for my game with SDL, when you click on an option a sub menu slides down and is shown, just sliding down is really boring, so I want it to accelerate(like if gravity was pulling it) ...
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1answer
73 views

Drawing geometry to an SDL_Texture?

As a direct result of this question that I asked a few days ago, I want to draw potentially-complex geometry to a SDL_Texture or, I suppose, an SDL_Surface. Ultimately, I want the foreground of a 2D ...
2
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0answers
51 views

How to create a scripted sequence [closed]

Like countless other video games, I'd like to have scripted sequences in my game. Character 1 says something, the player replies, then a rock falls, that sorta stuff. I could find a way to do it, but ...
3
votes
1answer
142 views

Calculate the Intersection of Two Volumes

If you've ever played The Swapper, you'll have a good idea of what I'm asking about. I need to check for, and isolate, areas of a rectangle that may intersect with either a circle or another ...
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3answers
1k views

Is it a good plan to use 2D physics for a 3D racing game? [closed]

I am working on a 3D racing game using SDL and OpenGL. I thought it would be easier to use a 2D physics engine, since I really don't need the 3rd dimension. There will be no flying cars or jumps, they ...
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1answer
58 views

How can I scale a subset of my game view during rendering?

I am developing a 2d game which has a lateral panel and a main panel with the scenario. I want to scale the main scenario to apply a zoom (only the main panel portion of the screen). I think if I use ...
0
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1answer
160 views

SDL2 window as child of Win32 GUI

I'm building an editor. Is it possible to create a child window of SDL2 within a Win32 gui? (The most obvious page from SDLTutorials works for earlier versions of SDL)
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0answers
29 views

How can I perform a masked erase in SDL2?

I'm trying to implement some shadow/lighting effects in my 2D-project, and I've concluded that if there is an easy way to perform a masked erase on an SDL_Texture, it would make the drawing operations ...
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0answers
96 views

Which will be better for a beginner, SDL, SFML or OpenGL? [closed]

I want to make games.For now simple 2D games, but I don't know from where to start. I "know" C++, but i havent worked with classes.I want to begin with game development and I searched in the internet ...
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2answers
130 views

Which library to choose between SDL and GTK for C game Development (Begginer) [closed]

Note: I know that this is a opinion based question I've been programming in C it's been some time, now I want to get into game development but I'm not sure which GUI library should I use between SDL ...
3
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1answer
168 views

How can I implement a dialogue where the words appear as if they were being typed?

I'm planning on putting a dialogue system into my game, I don't really work with surface so my way of implementing SDL_Ttf is by turning it into a texture, in other words, every paragraph would be ...
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1answer
69 views

Which buffering process would be more efficient?

I'm working on the base engine of my game right now, specifically converting a text file into a level on-screen. As a 2D platformer, each level has an array of rectangles that can be drawn to the ...
3
votes
1answer
109 views

Collision detection in Pong clone

Well I'm trying to create a pong clone using SDL and I had some problems with the frames and some times the ball would go through the paddles despite the fact that at other times the collision worked ...
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1answer
169 views

When should I use color keying vs PNG transparency?

SDL (and other toolkits) can use color keying to make a certain color in an image transparent. Alternatively, you could load a PNG image that supports transparency. When should I use which?
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2answers
324 views

How can I render a texture to the screen in SDL2?

I've recently started upgrading my SDL version from 1.2 to 2.0.3, and while on the SDL Wiki, I've come across SDL_Renderer, SDL_Window, and SDL_Texture. I did some research and found a link at ...
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3answers
183 views

How can I avoid repeatedly setting up SDL in VS 2013?

Do I have to set up SDL 2.0.3 every time I make a new project? I tried putting sdl.dll in system32 so that I don't have to include it in my project folders, but that didn't work.
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3answers
354 views

Can Simple Direct Media Layer be used with WebGL?

I have read that on desktop OpenGL + SDL is a great way to learn. In looking at WebGL I couldn't find a Web version of SDL. On their site I see bindings for all sorts of languages, but no JavaScript. ...
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1answer
277 views

Why do I see this “ghosting” effect with my sprite in SDL?

I'm using SDL to create a 2D side-scrolling platformer, but I'm getting ghosting from the sprite. I'm not used to programming with graphics or SDL so excuse any stupid remarks I make. Here's the ...
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1answer
36 views

Text not being rendered until I recreate the text class in SDL

I made a Text class, it is as shown below: Text::Text(const int score, const float &x, const float &y, const float &w, const float &h, SDL_Renderer *rend) { font = ...
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1answer
123 views

Having issues with pong physics, is my approach wrong?

I've been working on a pong clone, i've made games in the past but they have all been very hacky. This time I was trying to go for a better approach in terms of using OOP or patterns. So far the games ...
1
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1answer
50 views

Multiple keypresses causing wierd results in SDL

I have been building a pong clone. I've been using a mixture of peoples different code to understand the way they structure their games as well as reading on game patterns. Currently I've gotten to ...
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0answers
49 views

SDL2 Gamepad triggers trigger when disconnecting the pad

I'm using MonoGame and SDL2. I'm having a strange problem with the Gamepad. When I disconnect it during the game, before the disconnected event fires, the left and right triggers return values as if ...
1
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1answer
254 views

Scrolling with SDL2 & Box2d - My Camera isn't keeping up with my player

I'm trying to get a game on the google play store before I'm 40 (long held dream to publish a game since the days of the speccy), I have just over a month to go so it's not looking good! Foolishly I ...
4
votes
3answers
231 views

Make openGL program only update every 1/60 seconds

I'm learning C++ and openGL and have this program as a result from tutorials and playing around. The problem is that the main loop is running at "full speed", making the program unnecessarily cpu ...
1
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1answer
116 views

SDL_GameController automatic detection

Here's something that's been bugging me all day: Controller detection in SDL. First thing is that it doesn't automatically detect when a controller is connected. Finding out when a controller is ...
5
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2answers
262 views

Do I really need to clear the renderer every iteration?

Just a quick question about fine-tuning/optimization. If I'm making a 2D platformer with a parallax-scrolling background (meaning no two frames are the same) do I really need to clear my renderer for ...
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3answers
285 views

How can I implement a main menu?

I have been following the tutorials at http://lazyfoo.net/tutorials/SDL/index.php and although they are all very well written and I have learned more than I would have on my own, I am not sure how to ...
0
votes
1answer
186 views

Why does this code to filter events with SDL not function properly?

According to the SDL2 wiki, SDL_SetEventFilter : Use this function to set up a filter to process all events before they change internal state and are posted to the internal event queue. ...
0
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1answer
190 views

Render two images to an SDL_window

I want to create a menu for an SDL game, so I load an Image to an SDL_Window as the background, then I try to load the next image which will be a button but it doesn't display the button to the ...
1
vote
1answer
91 views

Background color gradient with SDL

I want to create a menu for a game using a color gradient as the background. Is there a way to create a gradient background instead of using an image for it (since I don't know what size the window ...
5
votes
3answers
3k views

Trap mouse in SDL

How can I trap the user's mouse inside my game? It's not a fullscreen game, but I want it so that the user cannot drag the mouse to outside the screen. Do I have to check the coordinates of the mouse ...
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0answers
50 views

How do I make a game object move at an angle in an integer-indexed grid? [duplicate]

I'm making a game in SDL2 and C++. I want a way to make any game object move in a specific direction. I've thought of assigning each object a direction in radians, from 0 until 2 PI where 0 would ...
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1answer
68 views

Events management using SDL 2.0

I wrote a simple SDL program using SDL 2.0. I have a little problem when I want to check the mouse wheel events. Actually, in the version 2.0 the flags SDL_BUTTON_WHEELDOWN and SDL_BUTTON_WHEELUP no ...
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0answers
65 views

SDL_FillRect() causes access violation on palletized surface with specific inputs [closed]

SDL2-2.0.1, Windows 7, MSVC 2008. Originally saw this problem with the release SDL libs, debugging now with the development libs. Following is the entire program I'm running, minus error checking for ...
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4answers
2k views

Rendering multiline text with SDL_TTF

Can you use any function to render more than a line of text in a surface? If you can't do this, what whould be the way to go? I am doing the following: Create a surface (not sure if should be a ...