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/////(BSL Shaders Edit)//////////////////////////////////////By LexBoosT//////

//Settings//
#include "/lib/settings.glsl"

//Varyings//
varying vec2 texCoord, lmCoord;
varying vec3 upVec, sunVec;
varying vec4 position;

//Fragment Shader///////////////////////////////////////////////////////////////////////////////////
#ifdef FSH

//Uniforms//
uniform float rainStrengthS;
uniform float screenBrightness;
uniform float viewWidth, viewHeight;

uniform int moonPhase;
#define UNIFORM_MOONPHASE

uniform ivec2 eyeBrightnessSmooth;

uniform mat4 gbufferProjectionInverse;

uniform sampler2D texture;
uniform sampler2D depthtex0;

//Common Variables//

float eBS = eyeBrightnessSmooth.y / 240.0;
float sunVisibility  = clamp(dot( sunVec,upVec) + 0.0625, 0.0, 0.125) * 8.0;
float moonVisibility = clamp(dot( -sunVec,upVec) + 0.0625, 0.0, 0.125) * 8.0;
float screenBrightness2 = clamp(screenBrightness, 0.0, 1.0);

//Common Functions//
void Defog(inout vec3 albedo){
	float z = texture2D(depthtex0,gl_FragCoord.xy/vec2(viewWidth,viewHeight)).r;
	if (z == 1.0) return;
	
	vec4 screenPos = vec4(gl_FragCoord.xy / vec2(viewWidth, viewHeight), z, 1.0);
	vec4 viewPos = gbufferProjectionInverse * (screenPos * 2.0 - 1.0);
	viewPos /= viewPos.w;
	
	float fog = length(viewPos) * OVERWORLD_FOG_DENSITY / 256.0;
	float clearDay = sunVisibility * (1.0 - rainStrengthS);
	fog *= (0.5 * rainStrengthS + 1.0) / (3.0 * clearDay + 1.0);
	fog = 1.0 - exp(-2.0 * pow(fog, 0.25 * clearDay + 1.25) * eBS);
	albedo.rgb /= 1.0 - fog;
}

//Includes//
#include "/lib/color/lightColor.glsl"
#include "/lib/color/blocklightColor.glsl"

//Program//
void main(){
	#if defined NETHER || defined END
	discard;
	#endif
	
	vec4 albedo = vec4(0.0);
	
	#ifdef WEATHER
	albedo.a = texture2D(texture, texCoord).a;
	
	if (albedo.a > 0.001){
		albedo.rgb = texture2D(texture, texCoord).rgb;
		
		albedo.a *= 0.25 * rainStrengthS * length(albedo.rgb / 8.0) * float(albedo.a > 0.1);
		albedo.rgb = sqrt(albedo.rgb);

		#if CUSTOM_RAIN_SNOW_COLORING == 1
			if (moonVisibility >0){
			albedo.rgb *= (finalRainSnowCol.rgb + lmCoord.x * lmCoord.x * blocklightCol) * WEATHER_OPACITY*0.05;
			}
			else
			albedo.rgb *= (finalRainSnowCol.rgb + lmCoord.x * lmCoord.x * blocklightCol) * WEATHER_OPACITY*1.50;
		#else
			albedo.rgb *= (ambientCol + lmCoord.x * lmCoord.x * blocklightCol) * WEATHER_OPACITY;
		#endif

		#if defined FOG && MC_VERSION <= 11500
		if (gl_FragCoord.z > 0.991) Defog(albedo.rgb);
		#endif
	}
	#endif
	
	/* DRAWBUFFERS:0 */
	gl_FragData[0]=albedo;
}

#endif

//Vertex Shader/////////////////////////////////////////////////////////////////////////////////////
#ifdef VSH

//Uniforms//

#if AA > 0
uniform int frameCounter;
uniform float viewWidth,viewHeight;
#include "/lib/util/jitter.glsl"
#endif

#ifdef NOUVELLE_PLUIE
uniform vec3 cameraPosition;
#endif

uniform mat4 gbufferModelView;
uniform mat4 gbufferModelViewInverse;
uniform float frameTimeCounter;

//Common Variables//
#ifdef OVERWORLD
	float timeAngleM = timeAngle;
#else
	float timeAngleM = 0.25;
#endif

//Program//
void main(){

	position=gbufferModelViewInverse*gl_ModelViewMatrix*gl_Vertex;
	float frameTimeCounter2=frameTimeCounter*2.0;
	
	#ifdef NOUVELLE_PLUIE
	
	vec3 worldpos=position.xyz+cameraPosition;
	bool istopv=worldpos.y>cameraPosition.y+5.;
	if(!istopv)position.xz+=vec2(0.2,0.2)+sin(frameTimeCounter2)*sin(frameTimeCounter2)*sin(frameTimeCounter2)*vec2(0.1,0.1);
	position.xz-=(vec2(0.3,0.2)+sin(frameTimeCounter2)*sin(frameTimeCounter2)*sin(frameTimeCounter2)*vec2(0.2,0.1))*0.10;
	position.xz-=(vec2(0.4,0.2)+sin(frameTimeCounter2)*sin(frameTimeCounter2)*sin(frameTimeCounter2)*vec2(0.3,0.1))*0.08;
	position.xz-=(vec2(0.5,0.2)+sin(frameTimeCounter2)*sin(frameTimeCounter2)*sin(frameTimeCounter2)*vec2(0.4,0.1))*0.06;
	#endif
	
	texCoord=(gl_TextureMatrix[0]*gl_MultiTexCoord0).xy;
	
	lmCoord=(gl_TextureMatrix[1]*gl_MultiTexCoord1).xy;
	lmCoord = clamp((lmCoord - 0.03125) * 1.06667, vec2(0.0), vec2(0.9333, 1.0));
	
	const vec2 sunRotationData=vec2(cos(sunPathRotation*0.01745329251994),-sin(sunPathRotation*.01745329251994));
	float ang=fract(timeAngleM-0.25);
	ang=(ang+(cos(ang*3.14159265358979)*-0.5+0.5-ang)/3.0)*6.28318530717959;
	sunVec=normalize((gbufferModelView*vec4(vec3(-sin(ang),cos(ang)*sunRotationData)*2000.0,1.0)).xyz);
	
	upVec=normalize(gbufferModelView[1].xyz);
	
	gl_Position=ftransform();
	
	#if AA > 0
		gl_Position.xy=TAAJitter(gl_Position.xy,gl_Position.w);
	#endif

}

#endif