OpenGL 4 Shading Language Cookbook - Third Edition

How to do it...

To create a shader program that generates a paint-spatter effect, perform the following steps:

1. Create a vertex shader that sends the texture coordinates to the fragment shader via the TexCoord output variable. It should also pass the position and normal to the fragment shader through the variables Position and Normal.
2. Use the following code for the fragment shader:

// Uniforms for the Phong shading model ... // The noise texture layout(binding=0) uniform sampler2D NoiseTex; // Input from the vertex shader in vec4 Position; in vec3 Normal; in vec2 TexCoord; // The paint-spatter uniforms uniform vec3 PaintColor = vec3(1.0); uniform float Threshold = 0.65; layout ( location = 0 ) out vec4 FragColor; vec3 phongModel(vec3 kd) ...