OpenGL is a graphics standard and API which targets the desktop and workstation markets. It is designed to be easy to accelerate with dedicated computer hardware, and hence most implementations give greatly improved performance over traditional software rendering. Currently, OpenGL is used for ...
0
votes
1answer
11 views
Drawing a sprite or text causes the OpenGl rendering to 'disappear' in SFML
I'm using some SFML built in functions to draw sprites and text as an overlay on top of some OpenGL rending in an SFML RenderWindow. The opengl rendering appears fine until I add the code to draw the ...
2
votes
0answers
28 views
Geometry shader for multiple primitives
How can I create a geometry shader that can handle multiple primitives? For example when creating a geometry shader for triangles, I define a layout like so:
layout(triangles) in;
...
0
votes
0answers
45 views
OpenGL, objects disappear at a certain z distance
I'm writing a managed OpenGL library in C++, and I'm having a pretty annoying problem. Whenever I set an objects position to -2.0 or lower, the object disappears. And at distances 0 through -1.9, it ...
4
votes
2answers
86 views
Sprite batching in OpenGL
I've got a JAVA based game with an OpenGL rendering front that is drawing a large amount of sprites every frame (during testing it peaked at 700). Now this game is completely unoptimized. There is no ...
1
vote
3answers
53 views
How to adjust position relative to resolutions?
I have a lot of objects on the screen and would like at different resolutions, object's positions rendered correctly on the screen irrespective of the resolution. Is it correct to multiply the ...
3
votes
1answer
88 views
Interleaving Arrays in OpenGL
In my pursuit to write code that matches todays OpenGL standards I have found that I am completely clueless about interleaving arrays. I've tried and debugged just about everywhere I can think of but ...
6
votes
1answer
35 views
Get SFML to report the version of OpenGL that is being used
How can I get SFML to report the version of OpenGL that is being used by the render window?
1
vote
1answer
60 views
OpenGL Fast-Object Instancing Error
I have some code that loops through a set of objects and renders instances of those objects. The list of objects that needs to be rendered is stored as a std::map>, where an object of class ...
1
vote
2answers
27 views
Animate sprite/texture position with VBO
I'm currently worlking on a renderer for my projects and I want animate a sprite on screen. I've got a spritesheet but I don't know what is the the best way to update the texture coordinates for each ...
1
vote
2answers
61 views
Billboarding + aligning with velocity direction
I'm working on a particle system where I'm orientating the billboard using the inverted orientation matrix of my camera. This works quite well and my quad are rotated correctly towards the camera.
...
1
vote
2answers
48 views
Parsing glGetShaderInfoLog() to get error info. Is this reliable, or is there a better way?
I want to get a list of errors and their line numbers so I can display the error information different to how it's formatted in the error string, and also show the line in error.
It looks easy enough ...
1
vote
1answer
48 views
Uniform not being applied to proper mesh
Ok, I got some code, and you select blocks on a grid.
The selection works. I can modify the blocks to be raised when selected and the correct one shows.
I set a color which I use in the shader. ...
0
votes
1answer
30 views
Objects won't render when Texture Compression + Mipmapping is Enabled
[EDIT: FIXED - Calling setting texture max level fixed that]
I'm optimizing my game and I've just implemented compressed (DXTn) texture loading in OpenGL. I've worked my way removing bugs but I can't ...
3
votes
2answers
106 views
Toggle Fullscreen at Runtime
Using the library GLFW, I can create a fullscreen window using this line of code.
glfwOpenWindow(Width, Height, 8, 8, 8, 8, 24, 0, GLFW_FULLSCREEN);
The line for creating a standard window looks ...
15
votes
3answers
446 views
What's the difference between mesh and a model?
Which one is created first? For example if a team worked on a graphical asset of a car, what would be a model and what would be a mesh of the car?
