GLSL is a programming language for OpenGL shaders.
3
votes
1answer
1k views
Morph a sphere to a cube and a cube to a sphere with GLSL
I'm getting started with GLSL with quartz composer.
I have a patch with a particle system in which each particle is mapped into a sphere with a blend value. With blend=0 particles are in random ...
3
votes
2answers
931 views
interpolating frames in a vertex shader
My models are stored as a set of meshes, each with a vertex list and normal list per key-frame, and indices for GL_TRIANGLES which is shared for all frames. Each frame I lerp between two adjacent ...
35
votes
1answer
2k views
How can I reduce aliasing in my outline glow effect?
I'm trying to replicate the glowing outline effect in the Left 4 Dead game. The effect causes an objects outline to glow, even when the object is occluded. Here is a screenshot of the effect:
I'm ...
16
votes
4answers
8k views
Using multiple shaders
I'm currently studying opengl shaders but I can't figure out something: how to apply different shaders to the objects, for example, a teapot rendered using toon shader and another one in the same ...
7
votes
2answers
2k views
GLSL Shader Editors for Linux
Are there any good IDE's for linux that lets us edit GLSL shaders and visualize their effect?
Note : Shader Designer By Typhoon Labs is a good option but I am looking for alternatives as this ...
7
votes
4answers
1k views
glsl demo suggestions?
In a lot of places I interviewed recently, I have been asked many a times if I have worked with shaders. Even though, I have read and understand the pipeline, the answer to that question has been no. ...
8
votes
2answers
2k views
OpenGL: VBO or glBegin() + glEnd()?
I recently was given this link to a tutorial site from someone who I gave the original OGL Redbook to. The third header down says distinctly to forget glBegin() & glEnd() as the typical render ...
6
votes
1answer
2k views
GLSL - Rewriting shaders from #330 to #130
I recently created a game (LD21) that uses a geometry shader to convert points into textured triangles/culling. Since I was under the impression that the support for #330 was widespread I only wrote ...
9
votes
1answer
5k views
How can I create an efficient bloom shader with GLSL?
I have searched the net for resources related to rendering a bloom effect using GLSL, but haven't found anything. Although the tutorial at Philip Rideout's website is a good one, it performs very ...
4
votes
1answer
983 views
Access vertex data stored in VBO in the shader
If I wanted to store extra data in a VBO for skinning (indices for indexing into an array of matrices of bones and floats for applying weights to those bones) How would I go about accessing that data ...
3
votes
1answer
1k views
GLSL if-else statement unexpected behaviour
This question is related to this other one I asked a few days ago. Because I have finally get to the bottom of the issue, I have rather preferred to open a new question with a more detailed ...
1
vote
1answer
885 views
Pygame water ripple effect
I have Googled for it but there are no ready scripts - as opposed to the same effect on Flash. I have checked the algorithm on The Water Effect Explained and also tested an implementation of the ...
0
votes
0answers
404 views
geomipmapping using displacement mapping (and glVertexAttribDivisor)
I wake up with a clear vision, but sadly my laptop card doesn't do displacement mapping nor glVertexAttribDivisor so I can't test it out; I'm left sharing here:
With geomipmapping, the grid at any ...
4
votes
1answer
134 views
Cheap ways to do scaling ops in shader?
I've got an extensive world terrain that uses vec3 for the vertex position attribute. That's good, because the terrain has endless gradations due to the use of floating point. But I'm thinking about ...
4
votes
1answer
975 views
How to invert background pixel's color
I'm writing a game and map editor using Java and jMonkeyEngine. In the map editor, I've got a brush done by wireframed sphere. My problem is: I want to make it visible everywhere, so I want to invert ...
2
votes
2answers
812 views
Multiplatform GLSL shader validator?
Im working on a multiplatform (Pc,Mac,Linux) game that uses shaders quite extensively. Since we do not have any funding, it is pretty hard to test our game on all possible hardware configurations.
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1
vote
0answers
274 views
shader-based particle systems
I have a classic particle system where each particle is represented by a quad and, each time step, I move each particle.
My target is webGL which means I don't have instancing, attribute divisors nor ...
0
votes
1answer
160 views
OpenGLES GLSL Shader attributes always bound to 0
So I have a very simple vertex shader as follows
#version 120
attribute vec3 position;
attribute vec3 inColor;
uniform mat4 mvp;
varying vec3 fragColor;
void main(void){
fragColor = inColor;
...
-5
votes
3answers
204 views
in the shadow of a sphere [duplicate]
(Related, but somewhat different, to my previous question)
How can I determine in a fragment shader if a fragment is in the shadow of a sphere?
That is, if it is occluded by the sphere and is past ...
