Questions tagged [geometry-shader]
For questions specifically about the Geometry Shader stage in the GPU pipeline.
8
questions
0
votes
1answer
67 views
Opengl geometry shader input point to output point doesn't show any ouput
I am trying a simple passthrough just to get a feel for the geometry shader. I am taking in a single point and trying to output that point from the geometry shader, it works with the vertex and ...
1
vote
1answer
54 views
draw on cubemap with help of geometry shader each triangle covers each cubemap face (why??)
I want to do some complicated stuff but have problems with my geometry shader / FBO bindings.
To hold it as easy as possible I reduced the code to a minimum. If this works, I could continue the hard ...
1
vote
1answer
87 views
Is it possible to send Texture Buffer to shader dynamically?
I want to send a series of integer to the geometry shader,
while the data will be modified every frame.
But when I try to retrive the sampleBuffer in geometry shader, it seems to keep output zero.
Am ...
2
votes
1answer
103 views
Vector graphics output from shader program
I’m fairly new to shader programs in general but I have a question concerning vector graphics. I understand that a pixel shader can generate the color information to draw some sort of geometry on ...
1
vote
1answer
122 views
Generating the end caps of a cylinder using triangle strips for use in a geometry shader
I know how to generate the walls of a cylinder with triangle strips and the caps with triangle fans, but since I am working inside a geometry shader, I can only output triangle strips, so I am kind of ...
1
vote
1answer
100 views
Issue with declaring inputs to geometry shader?
I am trying to pass vertex attributes from my vertex shader -> geometry shader and then to the fragment shader.
Pretty simple program, here is my vertex shader:
...
5
votes
1answer
1k views
How much should I rely on Geometry shaders in WebGL?
Geometry shaders appear to have been introduced in 3.2, which makes me wonder how common 3.2-enabled cards are, including support for Geometry shaders within WebGL contexts.
Will I be cutting out a ...
17
votes
1answer
2k views
Is there any way to generate primitives in a geometry shader without any input geometry?
A few years ago I tried to implement this GPU Gem in OpenGL to generate 3D procedural terrain using Marching Cubes. The article suggests to implement Marching Cubes in a geometry shader to maximum ...
