Top "Vertex-shader" questions

Vertex shader vs Fragment Shader

I've read some tutorials regarding Cg, yet one thing is not quite clear to me. What exactly is the difference …

opengl cg fragment-shader vertex-shader

In OpenGL vertex shaders, what is w, and why do I divide by it?

void main(void) { vec4 clipCoord = glModelViewProjectionmatrix * gl_Vertex; gl_Position = clipCoord; gl_FrontColor = gl_Color; vec3 ndc = clipCoord.xyz / clipCoord.…

opengl vertex-shader

Passing uniform 4x4 matrix to vertex shader program

I am trying to learn OpenGL and following this: http://www.opengl-tutorial.org/beginners-tutorials/tutorial-3-matrices/ Up until the point …

opengl glsl vertex-shader

What is the relationship between gl_Color and gl_FrontColor in both vertex and fragment shaders

I have pass-through vertex and fragment shaders. vertex shader void main(void) { gl_TexCoord[0] = gl_MultiTexCoord0; gl_Position = gl_ModelViewProjectionMatrix * …

opengl shader pixel-shader vertex-shader

change the color of a vertex in a vertex shader

Is it possible to set the color of a single vertex using a GLSL vertex shader program, in the same …

opengl glsl vertex-shader

Drawing a border on a 2d polygon with a fragment shader

I have some simple polygons (fewer than 20 vertices) rendering flat on a simple xy plane, using GL_TRIANGLES and a …

opengl-es opengl-es-2.0 glsl fragment-shader vertex-shader

Is it important to call glDisableVertexAttribArray()?

I'm not entirely clear on the scope of enabling vertex attrib arrays. I've got several different shader programs with differing …

opengl-es webgl vertex-shader

OpenGL rotation and translation done correctly

Im a bit stuck when it comes to rotation and translation in OpenGL. I got 3 Matrices, projection, view and model. …

opengl vertex-shader

How to write pass-through vertex and fragment shaders for a framebuffer with attached texture?

I'm attempting to use shaders to modify a texture that is bound to a framebuffer, but I'm confused as to …

opengl fragment-shader vertex-shader

Screen coordinates in fragment shader

In a fragment shader like the below: Shader "ColorReplacement" { Properties { _MainTex ("Greyscale (R) Alpha (A)", 2D) = "white" {} } SubShader { ZTest LEqual …

unity3d shader fragment-shader vertex-shader cg