I'm trying to write a geometry shader to replace glLineWidth behavior. I want to draw lines with a customizable width (doing this with a uniform suffices for now). The lines should always have the ...

I have an STL file loaded into my scene with a single colour applied to a phong material I'd like a way of applying two colours to this mesh's material with a gradient effect applied on the Z axis...

I've been attempting to write a two-pass GPU implementation of the Marching Cubes algorithm, similar to the one detailed in the first chapter of GPU Gems 3, using OpenGL and GLSL. However, the call...

UPDATE: I created a well documented ipython notebook. If you just want the code, look at the first answer. Question I've got a 40x40x40 volume of greyscale values. This needs to be rotated/shift...

In both the OpenGL and Direct3D rendering pipelines, the geometry shader is processed after the vertex shader and before the fragment/pixel shader. Now obviously processing the geometry shader afte...

So, I've been trying to draw a cylinder out of a line strip adjacency primitive with the geometry shader and it works for 4 vertices, but I want to make it so I that can apply it to longer line str...

I'm trying to render arbitrary wide lines (in screen space) using a geometry shader. At first it seems all good, but on certain view position the lines are rendered incorrectly: The image on th...

I am trying to implement single-pass wireframe, but I have got couple of issues in the process. Question #1 For some reasons I get only wireframe without (like with glPolygoneMode - lines) filled...

I want to draw a square from point data with the geometry shader. In the vertex shader, I emit a single point. #version 330 core void main() { gl_Position = vec4(0, 0, 0, 1.0); } In the geomet...

Is it possible to triangulate a quad with a hole in it using tesselation shader? For example, Imagine I have a Quad. Then I want to make a hole to the center of the quad. There need to be a lo...

I've written a very simple pass-through geometry shader. My input primitive is points and output primitive is also points. I also want to forward the color and normal from vertex shader to fragment...

I'm trying to write a simple geometry shader what just passes through vertices before attempting to modify stuff. My vertex shader is #version 150 core in vec3 inPosition; in vec4 inColor; out v...

So I've been trying for a while now, to pass a vertex attribute array into the geometry shader. It is an array of float (where the attribute per vertex is just a float value) Now, when I put this ...