#version 120

varying vec4 rawpos;
varying vec4 ecPosition;
varying vec3 VNormal;
varying vec3 Normal;
varying vec3 lightVec;

uniform sampler3D NoiseTex;
uniform float osg_SimulationTime;

const float scale = 1.0;

void main (void)
{
	const float snowlevel=2000.0;
	vec4 noisevecS   = texture3D(NoiseTex, (rawpos.xyz)*0.0126);
	vec4 nvLS   = texture3D(NoiseTex, (rawpos.xyz)*-0.0003323417);

	vec4 noisevec   = texture3D(NoiseTex, (rawpos.xyz)*0.00423+vec3(0.0,0.0,osg_SimulationTime*0.035217));
	vec4 nvL   = texture3D(NoiseTex, (rawpos.xyz)*0.001223417+(0.0,0.0,osg_SimulationTime*-0.0212));

	float fogFactor;
	float fogCoord = ecPosition.z;
	const float LOG2 = 1.442695;
	fogFactor = exp2(-gl_Fog.density * gl_Fog.density * fogCoord * fogCoord * LOG2);
	float biasFactor = exp2(-0.00000002 * fogCoord * fogCoord * LOG2);
	fogFactor = clamp(fogFactor, 0.0, 1.0);

	float a=1.0;
	float n=0.00;
	n += nvLS[0]*a;
	a/=2.0;
	n += nvLS[1]*a;
	a/=2.0;
	n += nvLS[2]*a;
	a/=2.0;
	n += nvLS[3]*a;

	a=4.0;
	float na=n;
	na += nvL[0]*1.1;
	a*=1.2;
	na += nvL[1]*a;
	a*=1.2;
	na += nvL[2]*a;
	a*=1.2;
	na += nvL[3]*a;
	a=2.0;
	na += noisevec[0]*a*0.2;
	a*=1.2;
	na += noisevec[1]*a;
	a*=1.2;
	na += noisevec[2]*a;
	a*=1.2;
	na += noisevec[3]*a;

// GOOD

	vec4 c1;
	c1 = vec4(smoothstep(0.0, 2.2, n), smoothstep(-0.1, 2.10, n), smoothstep(-0.2, 2.0, n), 1.0);
/*

vec3 Reflected = normalize(reflect(-normalize(lightVec), normalize(VNormal+nvL[2]*0.8))); 
vec3 bump = normalize(VNormal+vec3(0.0, 0.0, nvL[0]*1.4+nvL[1]*6.4+nvL[2]*16+noisevec[3]*3.3)*2.0-1.4);
vec3 bumped = max(dot(normalize(Normal), normalize(bump)), 0.0); 
bumped=max(normalize(refract(lightVec, normalize(bump), 0.3)), 0.0);
*/
vec3 Eye = normalize(-ecPosition.xyz);
vec3 Reflected = normalize(reflect(-normalize(lightVec), normalize(VNormal+vec3(0.0,0.0,na*0.10-0.24)))); 
//Reflected = normalize(reflect(-normalize(lightVec), normalize(VNormal)));
vec3 bump = normalize(VNormal+vec3(0.0, 0.0, na)-0.9);
vec3 bumped;
// = max(dot(normalize(Normal.xyz), normalize(bump)), vec3(0.0, 0.0, 0.0)); 
bumped=max(normalize(refract(lightVec, normalize(bump), 0.16)), 0.0);

vec4 ambientColor = gl_LightSource[0].ambient;
vec4 light = ambientColor;
c1 *= light;


//    c1 += gl_LightSource[0].diffuse*0.5 * pow(max(dot(Reflected, Eye), 0.0), 2.0/*gl_FrontMaterial.shininess*/);
//    c1 *= pow(max(Reflected.x+Reflected.y+Reflected.z, 0.0), 1.0/*gl_FrontMaterial.shininess*/);
//    c1 *= 0.3;
//	c1 = vec4(0.0);
//    c1 = vec4(0.0);
    //c1 += (vec3(0.0, 0.01, 0.01)*n) * pow(max(Reflected.x+Reflected.y+Reflected.z, 0.0), 9.0/*gl_FrontMaterial.shininess*/);
//    c1 += gl_LightSource[0].specular*2.0 * pow(max(dot(bumped, Eye), 0.3), 89.0)/*gl_FrontMaterial.shininess*/;


// HERE IS GOOD

    c1 += (vec4(0.3, 0.34, 0.4, 1.0)-0.1)*gl_LightSource[0].diffuse * (bumped.r+bumped.g+bumped.b);
//    c1 = bumped;
    c1 += gl_LightSource[0].specular*2.0 * pow(max(dot(Reflected, Eye), 0.0), 90.0/*gl_FrontMaterial.shininess*/);
	vec4 finalColor = c1;

	if(gl_Fog.density == 1.0)
		fogFactor=1.0;

	gl_FragColor = mix(gl_Fog.color ,finalColor, fogFactor);
}