#include "../sampler.glsl"

/*
contributors: Patricio Gonzalez Vivo
description: Standar way to get normals from a normal map
use: sampleNormal(<SAMPLER_TYPE> tex, <vec2> st)
options:
    - SAMPLER_FNC(TEX, UV): optional depending the target version of GLSL (texture2D(...) or texture(...))
license:
    - Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
    - Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
*/

#ifndef FNC_SAMPLENORMALMAP
#define FNC_SAMPLENORMALMAP
vec3 sampleNormalMap(in SAMPLER_TYPE tex, in vec2 st) { return SAMPLER_FNC(tex, st).xyz * 2.0 - 1.0; }
#endif