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Sumant Pattanaik
Public
Edited
Oct 31, 2023
Fork of Diffuse lighting: Lambert Cosine Model.
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3 forks
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specular = (x, V) => {
const L = (lightParameters.lightType=="point")? glMatrix.vec2.normalize([],glMatrix.vec2.sub([],lightPosition,[x,0])):lightVector;
const R = reflectAlongYAxis(L);
//const V = glMatrix.vec2.normalize([],glMatrix.vec2.sub([],eyePosition,[x,0]));
const N = [0, 1];
const H = glMatrix.vec2.normalize([],glMatrix.vec2.add([],L,V));
//return [L, R, V, N, H, dot(R,V), dot(N, H),specularParameters.exponent]
const factor = ((specularParameters.modelType == "Phong")? dot(R,V): dot(N, H))**specularParameters.exponent
return factor < 0 ? 0 : factor;
}
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dot = (A,B) => A[0]*B[0] + A[1]*B[1]
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