module.exports = function(hljs) { return { keywords: { keyword: 'float color point normal vector matrix while for if do return else break extern continue', built_in: 'abs acos ambient area asin atan atmosphere attribute calculatenormal ceil cellnoise ' + 'clamp comp concat cos degrees depth Deriv diffuse distance Du Dv environment exp ' + 'faceforward filterstep floor format fresnel incident length lightsource log match ' + 'max min mod noise normalize ntransform opposite option phong pnoise pow printf ' + 'ptlined radians random reflect refract renderinfo round setcomp setxcomp setycomp ' + 'setzcomp shadow sign sin smoothstep specular specularbrdf spline sqrt step tan ' + 'texture textureinfo trace transform vtransform xcomp ycomp zcomp' }, illegal: '