[Simple DirectMedia Layer 2](https://www.libsdl.org/) (SDL2) is designed to provide platform independent access to various common multimedia devices. It is the new, current and updated version of SDL and recommended for new projects over legacy SDL1.2
0
votes
1answer
29 views
How to stop SDL from freezing the rendering while resizing the window?
I have a simple SDL application with a re-sizeable window. If I minimize it and then maximize the window the rendering freezes. I've included a simple code example below which makes the screen flash ...
1
vote
1answer
28 views
How to handle different resolutions in SDL2?
What is the easiest way to set different resolutions with SDL2?
I was trying to use the SDL_RenderSetScale() function first, but for some reason it alters the physics of the game (jumps are higher or ...
3
votes
1answer
48 views
Can I offset all rendering in SDL2?
I know about SDL_RenderSetScale, but I need also horizontal/vertical shift of the renderer's origin. At the moment, I manually modify positions of all screen objects with the shift. Is there a way to ...
0
votes
1answer
87 views
Is 3d game development advantageous/possible in SDL2? [duplicate]
I think this is not appropriate, but as the given video in the link, the youtuber name Bisqwit creates his own 3d engine from scratch in C and SDL2. How much is this advantageous is real 3d game ...
4
votes
1answer
70 views
How do I create 4 rows of SDL_Rects with each row being a different color?
So using a class i've created a vector and managed to make one row of SDL_rects(with collision detection and destroy on collision). But when I make a second row(and obviously 2 or more rows):
1) it ...
1
vote
1answer
27 views
SDL2: Texture not rendering to screen
I'm trying to render a BMP image, but nothing is showing up other than the draw color. I have most of my code in a header file.
[game.h]
#ifndef __Game__
#define __Game__
#include <string>
#...
-1
votes
1answer
35 views
SDL2 graphics will draw in main process but not in separate thread
I'm having an issue that I'm absolutely stuck on and my ability to debug this issue has been exhausted.
I am implementing a base for a 2D game where I am handling my keyboard input, logic, and ...
0
votes
1answer
38 views
SDL2 in a VS2015/C++ panel
I'm trying to use SDL2 in a panel (VS2015/C++) and cannot find solid examples of how to connect the two. Anyone know how this is done?
I've tried some code found in various places, but no luck yet. ...
4
votes
1answer
55 views
How can I resize SDL2 windows efficiently?
I guess resizable windows are not being optimized for in game development but still... The following piece of code demonstrates a problem I'm having: resizing the window is very slow. Basically the ...
2
votes
1answer
87 views
Monitor external window events with SDL2
I'm trying to render my game (SDL2, C++) in a Windows Form application (C#) using C++/CLI to interface with my underlying C++ code. The purpose of the form is to create an editor which can monitor/...
0
votes
0answers
20 views
rendering moving terrain using midpoint displacement algorithm in sdl
This is in addition to the question I asked over here.
midpoint displacement algorithm in sdl.
The answer there helped me but I am facing another problem regarding the moving part. The terrain ...
1
vote
1answer
48 views
midpoint displacement algorithm in sdl
I am trying to implement moving random hills in SDL. I am using midpoint displacement algorithm to create some random terrain and I have also accomplished to move the terrain too. But the problem is ...
1
vote
2answers
84 views
Bullets Stop Working Error
I've made a vector which is used by a universally accessible namespace called 'BULLET_HANDLER'. This vector stores and updates all bullets that are produced from the 'shootBullet' function. The ...
11
votes
2answers
1k views
Removing delay at start of a key press
I'm making a simple game, and one of the problems I encountered is the annoying delay when pressing a key continuously.
So basically, when I press (for a very long time) for example Up, my object ...
1
vote
1answer
60 views
glGenBuffers is NULL
I'm using GLEW 1.13.0, (GLUT), SDL2 and OpenGL 3.3 core.
#include <GL/glew.h>
#include <GL/glut.h>
int main(int argc, char* args[]){
Engine::init(); // Initializes SDL_GL_* attributes
...
0
votes
0answers
25 views
Can't alt tab back to SDL2 window with SDL_WINDOW_FULLSCREEN_DESKTOP flag set in Ubuntu
Good evening. I'm trying to build a fullscreen borderless game to run on Ubuntu using SDL2. I'm currently at a loss as to why I can't ALT+TAB back into my SDL2 program after I switch out of it. The ...
2
votes
2answers
78 views
Input before or after update/draw?
This is how I understood the game loop, and I wanted to know if I'm correct or not:
1) Draw/render -> input
CPU | GPU
------------------
Update |
Draw |
Input | Rendering
2) Input -> ...
0
votes
2answers
116 views
How to use the SDL viewport properly?
I'm very confused about the SDL2 viewport, I did some googling to find out how to implement it but people keep mentioning things like "world coordinates" which I don't have in my game.
Question : Do ...
1
vote
0answers
105 views
How to draw 2D pixel data with OpenGL
I am fairly new to OpenGL. I have a 2D game in SDL2 that uses currently works by creating a SDL_Surface from the pixel data, copying it into a SDL_Texture, and rendering it to the screen with ...
1
vote
1answer
78 views
SDL2 linux fullscreen issue at lower-than-desktop resolution
Having a problem trying to get proper fullscreen in linux.
I'm using 1440x900 on desktop. When i set SDL to use 1280x720 as fullscreen, it does change screen resolution. But if i drag the mouse ...
1
vote
1answer
42 views
SDL2 SDL_PollEvent endless polling on key hold
What is wrong with SDL2 SDL_PollEvent() function? When I press-and-hold a key it enters "while (SDL_PollEvent())" block each frame. If in previous frame event queue was emptied and in new frame I ...
1
vote
0answers
74 views
Is it possible to create a homemade depth buffer?
Studying the case of isometric rendering, I'm facing a big and well-known problem : depth sorting.
After many researches it seems that without tile mapping or 'height-leveling' it's impossible to ...
0
votes
1answer
54 views
SDL Key Input previous and current key states not working as expected, how to fix?
Here is my code that's part of the main game loop:
// ResetKeyState stores currentKeyState in previousKeyState
// and then clears currentKeyState
engine.ResetKeyState();
// Fill ...
0
votes
1answer
18 views
Efficiently blit texture rotated by 90° to renderer with SDL 2
Let's say I have a 1024x768 SDL_Window, an SDL_Renderer bound to that window and a 768x1024 SDL_Texture into which I do my rendering. How can I render that texture such that it is rotated by 90° to ...
0
votes
1answer
72 views
Player position not updating when referenced in seperate class?
In my player class I have my players position set to update when you tap the directional keys, that works fine, but when I access my Players position variables, in my projectile class constructor, ...
0
votes
1answer
48 views
Unable to load two enemies with same pic in sdl2
I have loaded two enemies(with the same pic) into my game. However, when I draw them onto the screen it only draws and animates one enemy, instead of two. I can't seem to figure this out.
Here is my ...
1
vote
2answers
128 views
How can I represent a tile-based map and related properties on disk?
I'm trying to load a tile-based map in my game. I've been watching SDL tutorials for a while now but they never covered how to represent the map in a file? How can I represent a tile map on-disk in a ...
0
votes
3answers
147 views
How to “reload” a TTF Text during runtime?
As the title says I would like to know how to reload a TTF_SDL Text during runtime in C++.
What I want to do is to update all the values of the text each frame so I can, to example change the font ...
0
votes
0answers
30 views
Should all textures be power of 2 in SDL2? [duplicate]
I come from Gamemaker background, and I know that anything you give Gamemaker is put onto a texture page that is power of 2 size, but I am now making an SDL game engine and I am wondering, should all ...
0
votes
1answer
51 views
How to convert font size to pixels?
I'm trying to add text to my game using SDL_TTF, and it's working pretty well.
Except for one thing :
My text's SDL_Surface needs a width and a height, if I don't give it one it will automatically ...
0
votes
2answers
111 views
DeltaTime won't create smooth movement
The problem :
I tried adding deltaTime into my game, which seems to not be working when I try to smoothly move a object in my game.
How I calculate delta time :
Delta Time variables :
float ...
0
votes
1answer
72 views
My Sprite class generates a EXC_BAD_ACCESS error, and is sometimes NULL? Rect has weird values?
So, lets start off with the weird Sprite* object sometimes being NULL.
I run my game, the EXC_BAD_ACCESS error comes and sometimes, only sometimes my Sprite* has a value when it crashes.
Sometimes ...
0
votes
0answers
97 views
Filling polygons with texture/color using SDL2
I recently went on to making a 3D software renderer using SDL2 and Rust as a learning project. It has been going quite well, it can draw lines, polygons, and cubes.
Now, it can only display ...
0
votes
1answer
134 views
Why does SDL render the background from the operating system to the window?
My code displays a fully transparent window that copies the background from the operating system.
This is the code I use for rendering:
void render()
{
SDL_RenderClear(renderer);
...
2
votes
2answers
182 views
Example/Tutorial of passing structured data over network C++
This is very general question, about strategies how to pack same informations about state of my game-world on server ( e.g. position/orientation of players, projectiles, etc. ) into data stream so ...
0
votes
1answer
59 views
Simulate Keyboard Button Press [SDL Library]
I am trying to simulate an SDL keyboard button press (using C). I have looked up the SDL info pages online but I still don't have anything that consistently works.
I have the following (removed the ...
0
votes
1answer
145 views
Best way to structure SDL2/C++ game? [closed]
I was reading some SDL2 tutorials and I noticed that you need to pass your window surface handle to any drawRect calls. Should I create a global surface handle or pass the handle by reference into ...
0
votes
0answers
87 views
Implement camera in SDL
I'm trying to realize a simple camera in SDL which has its size and can be moved around. I have a vector of visible elements which will be drawn if the camera "sees" them.
Now, I checked this answer ...
1
vote
1answer
137 views
SDL2 and frames per second
I'm diving into the world of SDL2 and C++ and have a few questions after my first few weeks in. Seems like a lot of the tutorials are (from what I understand) limiting the frames per second with a ...
1
vote
1answer
458 views
SDL2, OpenGL, Nvidia laptop screen tearing
EDIT 2016-03-06.
Note 1: Apparently this is a known issue with Nvidia.
If you've found here due to same problem, please stoke the collective "please fix it" by filing a "question" at https://nvidia....
1
vote
1answer
29 views
Should I add error handling to SDL_GL_SetAttribute?
As the title says, I wonder if I should handle errors for :
SDL_GL_SetAttribute
Can it actually fail to set?
And if it can, what could be a reason for it to fail?
1
vote
1answer
77 views
Creating texture and palette modification
I need to create a texture from a surface with indexed color palette and alter the colors. However, after I set new colors, the rendered texture gets blank.
int main(int argc, char** argv)
{
init(...
0
votes
0answers
31 views
Implementing multiple cameras for multiple objects
Now, I have a Camera, and whenever I need to render elements I call the render function on the element and pass a camera to it like this:
elem.render(camera); // Renders only elem, using camera
...
0
votes
2answers
113 views
Why do SDL_Textures need to be created with a renderer?
I know how to create textures in SDL, but I don't get why they need to be created with a renderer:
SDL_CreateTexture(SDL_Renderer* renderer, ...)
When it comes to rendering, I can render my texture ...
1
vote
0answers
43 views
Awesomium custom surface scroll
I have a custom Awesomium::Surface implementation, and I need to create a Scroll function for it. The function asks me to manually move some pixels of my texture by the indicated X and Y offset.
How ...
1
vote
2answers
128 views
SDL Convert pixel format
I have two pixes stored in a 32 bit unsigned integer (4 bytes per pixel, using SDL's types for convenience):
Uint32 pixel1; // Source pixel, format: SDL_PIXELFORMAT_BGRA8888
Uint32 ...
2
votes
2answers
286 views
Create a new Surface type with SDL_Texture
So I started using Awesomium, and I'm experiencing some difficulties.
I want to create a new type of Awesomium::Surface and implement it in my custom Awesomium::SurfaceFactory to render Awesomium::...
3
votes
1answer
251 views
HTML UI with SDL2 [closed]
I realized that I need an HTML-like UI in my game, because by myself I wouldn't be able to achieve such effects (divs, text, coloring, and styling).
So I started to look around for a HTML Engine for ...
1
vote
0answers
27 views
Can I use sdl_net2.0 with cocos2d-x? [closed]
Can I use sdl_net2.0 lib with cocos2d-x? And how it cconects to each other. Or analog lib to use?
3
votes
1answer
126 views
Will SDL_DestroyRenderer() destroy every texture created with it?
The documentation on the SDL wiki states:
Use this function to destroy the rendering context for a window and free associated textures
So does this mean that every texture I create will be freed ...
