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    glsl-specular-beckmann

    1.1.2 • Public • Published

    glsl-specular-beckmann

    Computes the specular power from the Beckmann distribution

    Example

    #pragma glslify: beckmann require(glsl-specular-beckmann) 
     
    uniform vec3 eyePosition;
    uniform vec3 lightPosition;
     
    uniform float roughness;
     
    varying vec3 surfacePosition;
    varying vec3 surfaceNormal;
     
    void main() {
      vec3 eyeDirection = normalize(eyePosition - surfacePosition);
      vec3 lightDirection = normalize(lightPosition - surfacePosition);
      vec3 normal = normalize(surfaceNormal);
     
      float power = beckmann(lightDirection, viewDirection, normal, roughness);
     
      gl_FragColor = vec4(power,power,power,1.0);
    }

    Usage

    Install with npm:

    npm install glsl-specular-beckmann
    

    Then use with glslify.

    API

    #pragma glslify: beckmann require(glsl-specular-beckmann) 
    float beckmann(vec3 lightDir, vec3 eyeDir, vec3 normal, float shininess)

    Computes the specular power in the Beckmann model

    • lightDir is a unit length vec3 pointing from the surface point toward the light
    • eyeDir is a unit length vec3 pointing from the surface point toward the camera
    • normal is the surface normal at the sample point
    • roughness is a parameter between 0 and 1 measuring the surface roughness. Small values are shinier, larger values are rougher.

    Returns A float representing the specular power

    License

    (c) 2014 Mikola Lysenko. MIT License

    Install

    npm i glsl-specular-beckmann

    DownloadsWeekly Downloads

    87,014

    Version

    1.1.2

    License

    MIT

    Last publish

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