Tagged Questions
3
votes
0answers
65 views
OpenGL: Filtering/antialising textures in a 2D game
I'm working on a 2D game using OpenGL 1.5 that uses rather large textures. I'm seeing aliasing effects and am wondering how to tackle those.
I'm finding lots of material about antialiasing in 3D ...
8
votes
1answer
236 views
How to reduce image size without pixelation?
I see lots of games with smooth edges characters and high res images, however when I try to reduce images to say 64x64 for my character I just get a pixelated mess. even if I start with a 64x64 canvas ...
0
votes
1answer
78 views
How to seamlessly texture a cube in OpenGL
I have been following this site as an intro to OpenGL.
After going through the model obj loading tutorial, I wanted to create my own .obj (a cube) as well as my own texture. Following this blender ...
0
votes
0answers
21 views
Size of an image imported with FreeImage
I'm having abit of a brainfart and I can't quite grasp what I'm doing wrong.
It's quite simple, I am importing an image with FreeImage (http://freeimage.sourceforge.net/) which has a method ...
-1
votes
0answers
43 views
Texture / shader template program [closed]
I would like to use OpenGL to downsize images, using shaders. I would be very grateful, if somebody can give me a sample program in C++, which loads bitmap texture, draws it to the entire screen and ...
-2
votes
0answers
34 views
rendering or calling textures on the wall of the cube [closed]
what am i doing wrong im trying to call or render textures for my cube but when i put this code in the main program and run it all im getting is a black screen the cube vanishes am i calling ...
0
votes
0answers
47 views
textures and bouncing balls inside a cube [closed]
i have a cube with texture but when i add 3 balls so that they bounce on the walls of the cubes everything seemed to be wrong,the balls are not bouncing in the right directions, i want them to bounce ...
0
votes
0answers
35 views
trying to add texture to my code [closed]
I have been working on making a cube and I have some balls inside it though I am having problems on how I can put or add texture to my code. I am trying to learn but it seems whatever material I'm ...
3
votes
1answer
85 views
Multiple Textures in Shader?
I have this (pseudo) code:
unsigned int TextureLoc = glGetUniformLocation(programID, "objectTexture");
for(int i = 0; i < object->texturesCount; i++)
{
glActivateTexture(GL_TEXTURE0);
...
0
votes
1answer
141 views
How expensive is OpenGL Texture Binding
I'm currently working on a renderer for Tiled's .tmx maps. Among one of the features there is that layers and tilesets are independent, so that a layer can use any tile set on any tile. It's not so ...
0
votes
1answer
120 views
OpenGL accepted image formats
I am just starting out with OpenGL, so I need a little help understanding how textures are loaded. When I look at the OpenGL manual, it gives a list of accepted image formats, e.g.
...
0
votes
1answer
166 views
Stars coming out of screen [closed]
I am pretty new to Graphics Programming. I am currently using OpenGL.
I have got some hands-on in last few days. I have knowledge of Texture Mapping, Cubemap, Multitexturing. But somehow I am not able ...
0
votes
1answer
117 views
Using compressed(ETC1) textures in LibGDX
I use standard android tool for compressing PNG texture and archiving it with gzip:
/android-sdks/tools/etc1tool texture.png --encodeNoHeader
gzip texture.pkm
Then I try to load it:
FileHandle ...
0
votes
0answers
95 views
Using OpenGL3.3 and GLSL, texturing is not working [closed]
I am having troubles getting texturing working in my OpenTK/OpenGL 3.3 code. I am sure it is something simple that I am missing, but I just can't seem to get a texture on the square I am rendering. ...
5
votes
1answer
277 views
Is a 10 meg 2048x2048 bitmap too big a size texture to use in an OpenGL game?
This is a speed question, I have a texture, which is 2048 per 2048, the texture is designed to run in big resolutions (1920x1080 for example).
The problem is, that the texture have a size of 10MB in ...
0
votes
1answer
98 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 ...
0
votes
1answer
77 views
Devices or Smartphones That Can Run and Displayed Images Properly While Power of 2 Code is Disabled
Before making game apps, I want to have any certain smartphone device brands that runs on OpenGL. I have to make a code for images that doesn't need to required power of 2 images so that I can resize ...
0
votes
1answer
90 views
How to scale a texture in OpenGL/LWJGL?
How would I take a texture and render it to a specific size? The texture I'm rendering has a 1:1 ratio so I want to be able to render the whole image like if the window is wide then put black outlines ...
0
votes
1answer
112 views
Initializing a blank texture in OpenGL without artifacts
I'm generating a texture atlas in OpenGL, where I want to create a blank texture and copy my sprites to it.
The texture is generated like this:
glGenTextures(1, &texture);
...
2
votes
1answer
142 views
Any drawback to using rectangular textures over square textures in OpenGL?
I'm thinking about texture atlas generation where I'd have to choose the dimensions of my atlas, constrained both by my sprites and by the maximum texture size of the current platform.
Given that, is ...
1
vote
0answers
84 views
glFramebufferTexture2D gives corruption with cube map textures
I am using glFramebufferTexture2D with cube map textures but it gives corruption in texture. draw_cube() function works perfectly when i draw that on default framebuffer.
GLenum ...
12
votes
4answers
950 views
How to avoid texture bleeding in a texture atlas?
In my game there is a Minecraft-like terrain made out of cubes. I generate a vertex buffer from the voxel data and use a texture atlas for looks of different blocks:
The problem is that the texture ...
0
votes
0answers
113 views
2D Textures are shown through objects in front of it(OpenGL)
I am learning to use pyglet and learning about applying 2D textures to planes in pyglet. When I apply the 2D texture to the plane it works fine. When I make multiple objects with the same texture , ...
1
vote
2answers
241 views
VBO with texture index buffer different than vertex index buffer
I am trying to write my own OBJ importer and renderer in OpenGL (yes, I know, reinventing the wheel) and I found a problem that I don't knwo how to handle.
In an OBJ file faces are defined by a list ...
0
votes
0answers
142 views
Regarding Multisampling of textures [closed]
i am rendering white cube with green background in non default FBO and attaching the created multisampled texture to this FBO. When i render a cube in default FBO using above texture, it gives ...
1
vote
1answer
89 views
Multisampled Texture
i have some doubts with multisampled textures.
In fragment shader, how to pass multiple samples?
We use glTexImage2DMultisample instead of glTeximage2D. so, how to upload texture data?
I want to ...
5
votes
1answer
111 views
Blend multiple regions from same texture atlas
I'm representing terrain in my game as a grid with at each node a composition, for example 100% rock, or 50% grass, 50% soil. I'd like to use this composition vector to blend textures together. I'm ...
0
votes
0answers
47 views
System hangs at glReadPixel call with GL_TEXTURE_2D_ARRAY for texturing
I am calling glReadPixel after glDrawArray call. I am rendering a geometry with 3D texture on it as a target GL_TEXTURE_2D_ARRAY. My systems hangs at glreadpixel call. When i use target as ...
2
votes
1answer
129 views
Tutorial on OpenGL texture formats
Looking at the documentation glGetTexImage(), one can see that there are plenty of available texture formats.
GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_2D_ARRAY, ...
0
votes
0answers
273 views
3D texture coordinates for a cube
I want to use glTexImage3D with cube. what will be the texture coordinates for it? i am using GL_TEXTURE_3D as target. I tried with u v coordinates same as 2d texture coordinates with z component ...
