Questions tagged [geometry-shader]
For questions specifically about the Geometry Shader stage in the GPU pipeline.
1vote
2answers
457views
Geometry Shader Not Working
So I seem to have some trouble getting a geometry shader working with "glDrawArrays(GL_LINE_STRIP, 0, 4);". When I omit the geometry shader and make some minor variable changes, the vertex ...
1vote
1answer
493views
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 ...
2votes
1answer
516views
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 ...
- 1,503
1vote
1answer
246views
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 ...
- 13
2votes
1answer
573views
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 ...
- 121
1vote
1answer
401views
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 ...
- 111
1vote
1answer
348views
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:...
- 781
6votes
1answer
1kviews
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 ...
18votes
1answer
2kviews
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 ...
- 2,730
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