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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1answer
114 views

Brief pause after keypress

After i press and hold the key it goes forward once then pauses for a second or less then goes forward on forever. My problem is the brief pause I cant locate the issue. Thanks for your help. ...
-1
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1answer
138 views

Using interpolation to traverse waypoints

I'm making an isometric turn based strategy. Characters can move between tiles and tiles only, so I made a function for moving one tile in any direction. Regarding path-finding, I implemented A*, ...
2
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1answer
185 views

How to implement scripted events?

I'm building a game in C++ (using SDL) for a college project, I'm trying to figure out how to script events that happens when a player does something, or some time passes etc. I have a and idea of ...
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votes
2answers
200 views

Pixel size for clips in retro NES-like game?

I'm making a retro videogame, currently I'm using 32px x 32px tiles for the map and 64px x 32px for the characters. However the game looks extremely small, I could increase the tile size to something ...
4
votes
3answers
6k views

How to draw 2D images using OpenGL, in SDL?

After everything, I managed to find a simple piece of code that shows how to draw a 2D image with openGL: #include "SDL/SDL.h" #include "SDL/SDL_opengl.h" #include "SDL/SDL_image.h" ...
0
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1answer
952 views

SDL2 render to texture support

I'd like to use the function int SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture) in my 2D game. At this point I am using only the SDL 2.0 API, and using openGL seems overkill to ...
2
votes
1answer
232 views

2D Circular View/Background Wrapping SDL for Game

In the games such as Defender (1980 arcade) and Defcon, the player can move/scroll in one direction infinitely because the level/terrain simply wraps over and over again(like if it was wrapped around ...
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4answers
2k views

Trying to figure out SDL pixel manipulation?

Hello so I've found code that plots a pixel in an SDL Screen Surface : void putpixels(int x, int y, int color) { unsigned int *ptr = (unsigned int*)Screen->pixels; int lineoffset = y * ...
11
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5answers
801 views

What are the benefits of capping frames per second? (If any)

I am working on a simple game in OpenGL, using SDL for display initialization and input, and it appears in terms of timing I have two options available to me. Number one being just sleeping for the ...
0
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1answer
80 views

Luminance increase in SDL

We have managed to create grayscale picture using the following snippet of codes in SDL. What we need to do now is how to first convert into YUV or YCrCb for it be able to set the luminance value and ...
2
votes
2answers
4k views

SDL 2.0 setup on code::blocks using gcc(MinGW) on win7 [closed]

I have recently installed code::blocks on my system running windows 7 home premium 64-bit, and wanted to start learning SDL. The code::blocks executable is the one installed by the ...
0
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0answers
228 views

How do I use Opengl in conjunction with SDL?

I've been using SDL for a while in simple 2D games but have been limited as to what I can do graphics wise. I would like to start using Opengl. Does anyone know of any web tutorials for using Opengl ...
0
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1answer
152 views

SDL tiles rendering

I'm pretty new to SDL and wonder what is better if I have to draw tiled map on screen: to SDL_RenderCopy each tile from texture(which presents tileset) and then SDL_RenderPresent it every frame or to ...
0
votes
2answers
214 views

How to move player based on existing Game state?

I'm trying to build a basic platforming game in C++ using SDL, and I've encountered this issue enough to know that there's something I'm missing. What I'm working with, at the most basic level, is ...
4
votes
1answer
1k views

Game class and main function

I have a Game class with my main game functions and instances of game objects like screen, etc. My game is made using C++ and SDL. I was wondering, though, should main be a function of my class? Or ...
-1
votes
1answer
53 views

Reverting the view SDL

So in my SDL application, which I setup for OpenGL, if I were to do the following code: glBegin(GL_QUADS); glVertex2i(0, 0); glVertex2i(50, 0); glVertex2i(50, 50); glVertex2i(0, 50); glEnd(); The ...
7
votes
2answers
1k views

Input management techniques in large games

Is there a standard technique for managing input in large games. Currently, in my project, all input handling is done in the game loop, like so: while(SDL_PollEvent(&event)){ ...
2
votes
3answers
895 views

How should I store levels in a C++ game?

I am writing in C++. I am storing game levels as a 2-dimensional int array. This may be a hacky way of doing things, but I am not ready to change it unless I have to. I store values in the array and ...
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1answer
481 views

Is SDL a game engine? [closed]

I would like to ask if SDL is considered a game engine, or just a library like Open and Direct3D?
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2answers
495 views

SDL Function for Loading PNGs

I'm learning SDL 2.0 at the moment and I've seen this method for loading BMPs: SDL_Texture* LoadImage(std::string file) { SDL_Surface *loadedImage = nullptr; SDL_Texture *texture = nullptr; ...
1
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2answers
306 views

Recasting and Drawing in SDL

I have some code that essentially draws a column on the screen of a wall in a raycasting-type 3d engine. I am trying to optimize it, as it takes about 10 milliseconds do draw a million pixels using ...
0
votes
1answer
122 views

SDL 1.3 on Windows 7. Better hardware,lower FPS [closed]

I've just moved from one PC to another.I've been developing a game in SDL with SDL_image and SDL_ttf for about one year. On my old pc, I had about 90 FPS on my game, but now I have about 30, witch I ...
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1answer
238 views

How is destructable terrain made in SDL?

I'm looking for terrain that gets removed in chunks (like in Worms, of instance). How do you do this in SDL?
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5answers
4k views

OpenGL Insanely Slow [closed]

I'm learning C++, and I'm writing my first OpenGL program. Unfortunately, it seems to be defaulting to Software Rendering (CPU uses bounces, GPU uses stays at 1%). I'm using SDL as the Windowing ...
5
votes
4answers
9k views

Wavefront *.obj loader in C++

I'm creating a game using OpenGL (via SDL) and C++ (via Visual Studios 2010 Professional). During the game, I will be using 3D character animation. I'd like to use wavefront *.obj files for all the 3D ...
0
votes
1answer
650 views

OpenGL + SDL Linking Problem [closed]

So I'm trying to write a simple application with SDL 1.2 and OpenGL. This a stripped down version of the code containing the one problem I'm having. //The headers #include "SDL.h" #include ...
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0answers
57 views

Glowing Effect and Blending [duplicate]

I am using C++ and SDL and I am trying to get lines with a glowing effect as provided by the image of the game Defcon on the continental outlines. How could I achieve this glow and blend of the ...
2
votes
3answers
278 views

Efficient Collision Detection With Numerous Objects at Once [duplicate]

I am developing a 2D game with very large levels in which two teams(around 200 objects per team) fight against each other in planes, tanks, turrets,...etc. With every entity shooting bullets at their ...
0
votes
1answer
63 views

SDL - BlitSurfaced Background Slowing Time Based Movement

Whenever I use BlitSurface to apply a background image, the movement of my characters is slowed drastically even though I have movement based on time: SDL_BlitSurface( background, camera, screen, ...
0
votes
2answers
204 views

joystick movement for Geometry Wars clone

I am kinda new in game programming, but I've got a semestral work to make a game, so I decided to do a clone of Geometry Wars. Despite that the game is really simple (in principle), I have ran into a ...
1
vote
2answers
2k views

How to implement SDL Button/Menu GUI with callbacks?

I have been reading Bjarne Stroustrup's Programming Principles and Practice Using C++ for a while now and am nearing the end of the book. I have to tried to make a very simple game using the SDL ...
3
votes
2answers
317 views

SDL Multiple keyboard support

I am making a game with multiplayer split screen mode using SDL. Basically, I like the idea of having each player plug in his own keyboard to the PC, set custom controls via options and being able to ...
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votes
1answer
323 views

SDL_BlitSurface does not works

I have an issue with the SDL_BlitSurface... When I blit (SDL_BlitSurface) in a transparent (background) surface, it does not blits, actually I tried all the existants functions ...
0
votes
1answer
56 views

SDL text or additional images not loading

I've got a basic side scroller that allows the user to run and jump around. I've used various tutorials to get this far, but I can't seem to get any text to render, no matter what method. I also can't ...
2
votes
1answer
678 views

Trap mouse in SDL2

When using SDL 1.2 it the way to implement full screen or windowed applications with "no cursor" you did the following: SDL_ShowCursor(SDL_DISABLE); SDL_WM_GrabInput(SDL_GRAB_ON); See Trap mouse in ...
3
votes
1answer
268 views

Does SDL running on Mac OS not recognize Xbox controllers?

I'm trying to learn a bit of SDL, and have been bouncing between Windows and Mac platforms, but am noticing that an SDL program running on my Macbook doesn't recognize the presence of the Xbox ...
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votes
1answer
362 views

OpenGL/SDL2 window stopped rendering [closed]

I have been working on a game engine for a couple of days now and I've had it rendering a colourful cube and playing sounds in OGG format, but, after refactoring my code-base to make things easier; it ...
-1
votes
1answer
223 views

SDL Access Violation

I've created a SDL game project and this window popped up while trying to compile: First-chance exception at 0x00000000 in SDL_Game.exe: 0xC0000005: Access violation executing location 0x00000000. ...
-4
votes
1answer
220 views

C++ SDL/SFML advancing help [closed]

I've been playing around programming using SDL and SFML for a while now and done all the basic tutorials I can find(love lazyfoo). but I'm stuck and not sure how to move on from simple games like ...
0
votes
2answers
901 views

Is there an alternative to SDL 1.3 for a C++ game that should run on iOS and Android?

I've used SDL for many desktop games, always as the cross-platform glue for: Creating a window Processing input Rendering images Rendering fonts Playing sounds/music It has never disappointed me ...
0
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0answers
240 views

SDL - Sprite “Ghosting”

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 ...
3
votes
1answer
312 views

Why (SDL) animated filled-circle leaves trail of movement?

I'm trying to achieve proper animation using SDL. Used flags are SDL_HWSURFACE and SDL_DOUBLEBUF. That what I'm getting is technically smooth (I think), but I can figure out what should I do to ...
0
votes
1answer
244 views

SDL_types.h file not found using xcode

Getting this error when trying to use SDL_mixer... SDL_types.h file not found.. I am including all the correct files as far as I can tell and have included the frameworks (both SDL and SDL_mixer) ...
1
vote
1answer
230 views

SDL_Image and typical SDL BMP loading fails completely

been messing with OpenGL and SDL for a pair of weeks. The thing is quite weird. I have been loading a texture from a BMP and using a really easy shader to make it work, and so far it has worked very ...
3
votes
3answers
599 views

Unable to detect continuous keypress event in SDL

I am developing a game using SDL, and am unable to do continuous motion for my object when a key is held down. I'm calling SDL_PollEvent() to retrieve all events during a frame, and passing each ...
1
vote
2answers
517 views

My SDL Game executable cannot run outside codeblocks

After compiling and running SDL programs successfully inside CodeBlocks, when I run them outside CodeBlocks (by clicking .exe file) my program does not run. Instead, it says that libstdc++6.dll is ...
4
votes
3answers
2k views

Smooth Sprite Movement - Don't Add Velocity to Position?

I am trying to figure out if there is a way to move a sprite smoothly on the screen at different speeds without stuttering, but keeping the effect that it's moving smoothly; especially at faster ...
2
votes
1answer
1k views

Is basic SDL hardware accelerated?

I'm going over some SDL tutorials aimed at creating 2D games. However, when I create a basic SDL program - is it hardware accelerated? Or is hardware acceleration only relevant when it comes to 3D ...
1
vote
2answers
259 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. ...
0
votes
1answer
214 views

SDL.NET vs SDL C++

I am currently transitioning from XNA to SDL, and was wondering if SDL.NET provides the same benefits as SDL C++. Considering that SDL.NET uses the .NET framework as a wrapper to the SDL base ...