OpenGL 4 Shading Language Cookbook - Third Edition

How to do it...

To create a shader program that generates a night-vision effect, perform the following steps:

1. Set up your vertex shader to pass along the position, normal, and texture coordinates via the Position, Normal, and TexCoord variables, respectively.
2. Use the following code for the fragment shader:

in vec3 Position; in vec3 Normal; in vec2 TexCoord; uniform int Width; uniform int Height; uniform float Radius; layout(binding=0) uniform sampler2D RenderTex; layout(binding=1) uniform sampler2D NoiseTex; subroutine vec4 RenderPassType(); subroutine uniform RenderPassType RenderPass; // Define any uniforms needed for the shading model. layout( location = 0 ) out vec4 FragColor; vec3 phongModel( vec3 pos, vec3 norm ) { // Compute the ...