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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votes
1answer
248 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
62 views
SDL 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 ...
1
vote
0answers
51 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
139 views
Efficient Collision Detection With Numerous Objects at Once
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
36 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, ...
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votes
1answer
35 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 ...
0
votes
2answers
139 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
118 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 ...
2
votes
2answers
195 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 ...
-2
votes
1answer
151 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
23 views
pygame pyopengl resizing problem (under linux) [closed]
In test setup, i use no matrix transformations (screen coord space, -1.0 to 1.0)
The shader is simply gl_Position = position.
After resize i get correctly scaled render, but viewport is cropped into ...
1
vote
3answers
334 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 ...
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votes
1answer
30 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 ...
1
vote
1answer
64 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
90 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
128 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
97 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
100 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
479 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
votes
0answers
89 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
166 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
113 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) ...
2
votes
0answers
67 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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votes
1answer
106 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
229 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
214 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
399 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 ...
0
votes
0answers
102 views
Mix_LoadWAV not working on xcode 4.6 using SDL [closed]
I am trying to load a simple sound effect using SDL_mixer on xcode but it is not loading. Here is the code:
#include <SDL/SDL.h>
#include "SDL_image.h"
#include "SDL_mixer.h"
#include ...
3
votes
1answer
339 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
121 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
169 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 ...
2
votes
1answer
396 views
Bad FPS for smaller size (OpenGL ES with SDL)
If you saw my other question, well, there is still a little problem:
Click here to watch on youtube
Basically, the frame rate is very bad on the actual device, where for some reason the animation is ...
0
votes
3answers
241 views
Dynamic Sprite Scaling in SDL?
I was wondering if I could get a player sprite effect similar to the one in this video using SDL (without openGL). If not, does anyone know how I might achieve that effect using SDL/OpenGL?
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votes
1answer
327 views
2d Game using monotouch?
I'd like to make a 2d game and I like SDL but I don't think there is an SDL for monotouch. Whats the closest solution?
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votes
0answers
32 views
How do I initialize audio to use DUMB with SDL?
Am I able to just call SDL_Init(SDL_INIT_AUDIO); to initialize the audio and DUMB is good to go, or do I have to set the SDL_AudioSpec parameters and call SDL_OpenAudio(parameter1,parameter2);?
...
1
vote
1answer
64 views
SDL deleting an image from the screen?
Well, I'm sort of a beginner to SDL, and I was wondering how one would go about deleting an image from the screen and replacing it with another? I attempted to do this, but it didn't seem to change ...
3
votes
2answers
180 views
How does this background scrolling code work?
I'm glad that this code does exactly what I wanted it to do...But I can't make sense of it although I wrote it from scratch myself. What I wanted to do was create an infinitely scrolling background.
...
1
vote
4answers
2k views
How can I process continuously-held keys with SDL?
I have created a cube in opengl using SDL. Now I am trying to move the camera in X direction if user presses left or right arrow keys and Y direction if user presses up or down arrow keys. Right now ...
1
vote
1answer
260 views
SDL2 focus lost = massive gain in FPS
Whenever I lose focus from my game window, I go from ~60FPS to 6000+, then when the window gains focus again, I go back to around 60 frames per second. And yes, this happens every time I run my game, ...
-4
votes
1answer
230 views
Game in c++ using opengl and sdl [closed]
My problem is next:
For my school project for the last year of study i have decided to make a game. My game is played in labyrinth, game for four players. I decided i am going to make it using sdl ...
3
votes
2answers
193 views
Not So Beginner Tutorial Request
So my game is done for now but every time it flashes on the screen and my game loop is awful. So crowded with logic.
I need to learn more about games and how they are running. My idea now is that at ...
-2
votes
2answers
529 views
making a game in 2D(C++). SDL or openGL? Or, why not both? [closed]
I'm trying to make a platform game in 2D and I want to know what tool should I use to make it happen. I understand that I can use SDL with openGL. However, if I want to make a solid 2D platform game, ...
1
vote
3answers
2k 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"
...
1
vote
1answer
134 views
Implementing a Menu System and Buttons (Waiting in a whle loop)
I have a menu system with four screens and six buttons. I have created a button class and it works great. I even have events for the buttons working. The problem is that I have to run the events ...
0
votes
1answer
345 views
Does SFML render it's graphics using OpenGL internally?
By that, I mean that SFML has an abstraction for OpenGL? Sort of like SDL's blit functions, but using OpenGL internally?
"Yes SFML uses OpenGL for all the graphical stuff. "
Received this comment ...
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votes
1answer
148 views
Logic For camera Movement
Every time I move the hero on my screen I increment a screenOffsetX and a screenOffsetY.
These add 1 if you move right, -1 if left to the sceenOffsetX. Add the screenOffestY +=1 if down, -=1 if up.
I ...
2
votes
3answers
415 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 ...
0
votes
1answer
69 views
Help Applying SDL_Surface on an array of SDL_Surface?
I'm trying to make a 4x4 blocks (50x50 px) with SDL Surface. Added another block (50x50 px, I wrote the variable as 'flag') that can only move within the 4x4 blocks, so I can select one of the blocks ...
0
votes
2answers
194 views
Map is rendering too slow
I have a basic 20x20 array that stores the map for my game. It either has a 1 or 0 to say a path and a non path. When I draw it on the screen, It seems to take to long to draw one at a time and looks ...
2
votes
3answers
376 views
How can I measure the execution time of some code?
How can I capture how long something takes to complete and log it to the output window (in Visual Studio)?
Is there a special library for this?
clock_t start, end;
double cpuTime;
start = clock();
...
