#version 150

// Ogre port of Nvidia's IsoSurf.cg file
// Modified code follows. See http://developer.download.nvidia.com/SDK/10/opengl/samples.html for original
//
// Cg port of Yury Uralsky's metaball FX shader
//
// Authors: Simon Green and Yury Urlasky
// Email: sdkfeedback@nvidia.com
//
// Copyright (c) NVIDIA Corporation. All rights reserved.
////////////////////////////////////////////////////////////////////////////////////////////////////

in vec3 oNormal;

out vec4 fragColour;

// Pixel shader
void main()
{
    // Sanitize input
    vec3 N = normalize(oNormal);
    vec3 L = vec3(0, 0, 1);
    float nDotL = dot(N, L);

    vec3 materials[2] = vec3[](vec3(1, 1, 1), vec3(0, 0, 0.5));

    fragColour = vec4(abs(nDotL) * materials[int(nDotL < 0.0)], 0.1);
}