solid.frag

#version 330
 
/*
 *  Copyright (C) 2010 - 2016 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 * 
 * 
 *  Copyright (C) 2021 - 2025 Leonid Kostrykin
 * 
 */
 
uniform vec4 color;
uniform mat4 normalsView;
 
in vec4 normal;
 
layout( location = 0 ) out vec4 _gl_FragColor;
 
 
// ----------------------------------------------------------------------------------
// Fragment Procedure
// ----------------------------------------------------------------------------------
 
void main()
{
    vec3 lightDirection = vec3( 0, 0, -1 );
    float diffuseLightAmount = max( 0, -dot( normalize( ( normalsView * normal ).xyz ), lightDirection ) );
    _gl_FragColor = vec4( color.rgb * diffuseLightAmount, color.a );
}