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/*
* Copyright (C) 2018, 2022 Tomasz Kramkowski <tk@the-tk.com>
* SPDX-License-Identifier: MIT
*/
void main()
{
vec3 fdiff = vec3(texture(tdiff, i.uv));
vec3 fspec = vec3(texture(tspec, i.uv));
vec3 lico = vec3(1.0, 1.0, 1.0);
vec3 amb = vec3(0.1, 0.1, 0.1);
vec3 norm = normalize(i.norm);
vec3 lidir = normalize(i.lipos - i.pos);
vec3 diff = max(dot(norm, lidir), 0.0) * fdiff;
float specen = max(sign(dot(lidir, norm)), 0.0);
vec3 vwdir = normalize(-i.pos);
vec3 mid = normalize(lidir + vwdir);
vec3 spec = pow(max(dot(norm, mid), 0.0), 256) * specen * fspec;
color = vec4((amb + diff + spec) * lico, 1.0);
}
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