#include "/lib/settings.glsl"
#include "/lib/util.glsl"
#include "/lib/res_params.glsl"

flat varying vec4 lightCol;
flat varying vec3 averageSkyCol;
flat varying vec3 averageSkyCol_Clouds;

#if defined LPV_VL_FOG_ILLUMINATION && defined IS_LPV_ENABLED
	flat varying float exposure;
#endif

#if defined Daily_Weather
	flat varying vec4 dailyWeatherParams0;
	flat varying vec4 dailyWeatherParams1;
#endif



flat varying vec3 WsunVec;
flat varying vec3 refractedSunVec;

uniform vec2 texelSize;

uniform sampler2D colortex4;

uniform float sunElevation;
uniform vec3 sunPosition;
uniform mat4 gbufferModelViewInverse;
uniform int frameCounter;


flat varying vec2 TAA_Offset;
uniform int framemod8;
#include "/lib/TAA_jitter.glsl"


//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////


uniform float frameTimeCounter;
#include "/lib/Shadow_Params.glsl"
#include "/lib/sky_gradient.glsl"
void main() {
	gl_Position = ftransform();

	gl_Position.xy = (gl_Position.xy*0.5+0.5)*(0.01+VL_RENDER_RESOLUTION)*2.0-1.0;
	
	#ifdef OVERWORLD_SHADER
		lightCol.rgb = texelFetch2D(colortex4,ivec2(6,37),0).rgb;
		averageSkyCol = texelFetch2D(colortex4,ivec2(1,37),0).rgb;
		averageSkyCol_Clouds = texelFetch2D(colortex4,ivec2(0,37),0).rgb;
	
		#if defined Daily_Weather
			dailyWeatherParams0 = vec4((texelFetch2D(colortex4,ivec2(1,1),0).rgb/150.0)/2.0, 0.0);
			dailyWeatherParams1 = vec4((texelFetch2D(colortex4,ivec2(2,1),0).rgb/150.0)/2.0, 0.0);
			
			dailyWeatherParams0.a = (texelFetch2D(colortex4,ivec2(3,1),0).x/150.0)/2.0;
			dailyWeatherParams1.a = (texelFetch2D(colortex4,ivec2(3,1),0).y/150.0)/2.0;
		#endif
	
	#endif

	#ifdef NETHER_SHADER
		lightCol.rgb = vec3(0.0);
		averageSkyCol = vec3(0.0);
		averageSkyCol_Clouds = vec3(2.0, 1.0, 0.5) * 10.0;
	#endif

	#ifdef END_SHADER
		lightCol.rgb = vec3(0.0);
		averageSkyCol = vec3(0.0);
		averageSkyCol_Clouds = vec3(5.0);
	#endif

	lightCol.a = float(sunElevation > 1e-5)*2.0 - 1.0;
	WsunVec = lightCol.a * normalize(mat3(gbufferModelViewInverse) * sunPosition);

	refractedSunVec = refract(WsunVec, -vec3(0.0,1.0,0.0), 1.0/1.33333);

	#if defined LPV_VL_FOG_ILLUMINATION && defined IS_LPV_ENABLED
		exposure = texelFetch2D(colortex4,ivec2(10,37),0).r;
	#endif

	#ifdef TAA
		TAA_Offset = offsets[framemod8];
	#else
		TAA_Offset = vec2(0.0);
	#endif

}