All Questions
10
questions
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53
views
Flexible llighting method in 2D (using OpenGL)
I'm working on a simple 2D game engine. I'd like to support a variety of light types, like the URP in Unity. Lighting would be calculated according to the normal and specular maps attached to the ...
2
votes
0
answers
225
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How can I switch between 2 shaders without adding more and more draw calls?
I would like to create a renderer class that can switch between 2 or more shaders without adding more and more draw calls.
What I mean is to have 2 shaders - A and B - and method that takes shader, ...
user9546059
0
votes
1
answer
384
views
How to use OpenGL to render 2D points on an x-axis timeline representing a wide time range?
I'm writing an OpenGL 2D plotting application to visualize real-time data. The x-axis timeline represents time in nanoseconds, however, the application will be plotting data that is collected over ...
- 11
1
vote
1
answer
133
views
Open GL Translucid Sprites
So, my goal is to draw sprites with translucid pixels.
First, I render the sprites with a shader that only renders the opaque pixels. Then, I disable depth buffer writing and render the same sprites ...
- 35
1
vote
1
answer
2k
views
OpenGL 2d (orthographic) rendering for GUI, the modern way
I want to render GUI components in my OpenGL program. They are still just simple textured (vbo) rectangles.
I would like to get the following things done, the right way.
Drawing using screen ...
- 1,194
0
votes
2
answers
626
views
I have a SpriteBatch, but what about batching geometry?
I have written a SpriteBatch utility that can batch sprites together and render them using GL_TRIANGLES ( 6 vertices per sprite ). I would also like to be able to have a way to draw other primitives, ...
- 509
0
votes
1
answer
1k
views
OpenGL 2D pixel perfect rendering
I'm trying to render a 2D image so that it will cover the entire window exactly.
For my test, I setup a window so that the client area is exactly 320x240 and the texture is also this size.
I setup my ...
- 3,212
1
vote
1
answer
582
views
opengl/pyopengl - exact same frame rendered in multiple viewports?
I'm writing a simple tool in PyOpenGl for displaying visual stimuli that are used in a physiology experiment. Currently I render my stimuli on a single viewport inside a wxGLCanvas, which I display ...
- 73.8k
2
votes
2
answers
5k
views
OpenGL: How to optimize 2d rendering with multiple layers overlapping each other in 3d mode?
I know how to speed up rendering in 3d by simply rendering the nearest planes first.
But how do i get advantage of this type of method in 2d mode? I cant use depth testing because they are all in the ...
- 3,803
3
votes
3
answers
3k
views
2D openGL drawing lines that don't exactly fit pixel raster
I'm drawing something similar to a LED VU meter in OpenGL. Result should be like on vertical bar of this:
Unfortunately, my drawing space is restricted, and I have to fit exactly 18 bars on it. That ...
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