// Forward pass
Pass
{		
	Tags { "LightMode"=${VFXPassForward} }
	
	${VFXStencilForward}
	
	HLSLPROGRAM
	#pragma target 4.5
	${VFXPassForwardAdditionalPragma}

	struct ps_input
	{
		float4 pos : SV_POSITION;
		#if USE_FLIPBOOK_INTERPOLATION
		float4 uv : TEXCOORD0;
		#else
		#if USE_FLIPBOOK_ARRAY_LAYOUT
		float3 uv : TEXCOORD0;
		#else
		float2 uv : TEXCOORD0;	
		#endif
		#endif
		#if VFX_NEEDS_COLOR_INTERPOLATOR
		VFX_OPTIONAL_INTERPOLATION float4 color : COLOR0;
		#endif
		#if USE_SOFT_PARTICLE || USE_ALPHA_TEST || USE_FLIPBOOK_INTERPOLATION || USE_EXPOSURE_WEIGHT || VFX_FEATURE_MOTION_VECTORS_FORWARD
		// x: inverse soft particles fade distance
		// y: alpha threshold
		// z: frame blending factor
		// w: exposure weight
		VFX_OPTIONAL_INTERPOLATION float4 builtInInterpolants : TEXCOORD1;
		#endif
		#if USE_FLIPBOOK_MOTIONVECTORS
		// x: motion vectors scale X
		// y: motion vectors scale Y
		VFX_OPTIONAL_INTERPOLATION float2 builtInInterpolants2 : TEXCOORD2;
		#endif
		#if VFX_NEEDS_POSWS_INTERPOLATOR
		float3 posWS : TEXCOORD3;
		#endif
		
		#if VFX_FEATURE_MOTION_VECTORS_FORWARD
		VFX_FEATURE_MOTION_VECTORS_INTERPOLATION float4 cPosPrevious : TEXCOORD4;
		VFX_FEATURE_MOTION_VECTORS_INTERPOLATION float4 cPosNonJiterred : TEXCOORD5;
		#endif
		
		#if SHADERGRAPH_NEEDS_NORMAL_FORWARD
		float3 normal : TEXCOORD6;
		#endif
		#if SHADERGRAPH_NEEDS_TANGENT_FORWARD
		float3 tangent : TEXCOORD7;
		#endif
		
        ${VFXAdditionalInterpolantsDeclaration}
		
		UNITY_VERTEX_OUTPUT_STEREO
	};
	
	struct ps_output
	{
		float4 color : SV_Target0;
#if VFX_FEATURE_MOTION_VECTORS_FORWARD
		float4 outMotionVector : SV_Target1;
#endif
	};

#define VFX_VARYING_PS_INPUTS ps_input
#define VFX_VARYING_POSCS pos
#define VFX_VARYING_COLOR color.rgb
#define VFX_VARYING_ALPHA color.a
#define VFX_VARYING_INVSOFTPARTICLEFADEDISTANCE builtInInterpolants.x
#define VFX_VARYING_ALPHATHRESHOLD builtInInterpolants.y
#define VFX_VARYING_FRAMEBLEND builtInInterpolants.z
#define VFX_VARYING_MOTIONVECTORSCALE builtInInterpolants2.xy
#define VFX_VARYING_UV uv
#if VFX_NEEDS_POSWS_INTERPOLATOR
#define VFX_VARYING_POSWS posWS
#endif
#if USE_EXPOSURE_WEIGHT
#define VFX_VARYING_EXPOSUREWEIGHT builtInInterpolants.w
#endif
#if VFX_FEATURE_MOTION_VECTORS_FORWARD
#define VFX_VARYING_VELOCITY_CPOS cPosNonJiterred
#define VFX_VARYING_VELOCITY_CPOS_PREVIOUS cPosPrevious
#endif

${VFXPassForwardDefine}
	
#if SHADERGRAPH_NEEDS_NORMAL_FORWARD
#define VFX_VARYING_NORMAL normal
#endif
#if SHADERGRAPH_NEEDS_TANGENT_FORWARD
#define VFX_VARYING_TANGENT tangent
#endif
		
	${VFXInclude("Shaders/ParticlePlanarPrimitives/Pass.template")}	
#if VFX_SHADERGRAPH
	${SHADERGRAPH_PIXEL_CODE_FORWARD}
#endif
		
	#pragma fragment frag
	ps_output frag(ps_input i)
	{
		UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
		ps_output o = (ps_output)0;
		VFXTransformPSInputs(i);
		${VFXComputeNormalWS}
		
#if VFX_SHADERGRAPH
        ${VFXAdditionalInterpolantsPreparation}
        
        ${SHADERGRAPH_PIXEL_CALL_FORWARD}
        
        #if HAS_SHADERGRAPH_PARAM_BASECOLOR
            o.color.rgb = OUTSG.${SHADERGRAPH_PARAM_BASECOLOR}.rgb;
            o.color = VFXApplyPreExposure(o.color, i);
        #endif

        #if HAS_SHADERGRAPH_PARAM_EMISSION
            float4 emission = float4(OUTSG.${SHADERGRAPH_PARAM_EMISSION}.rgb, 0.0f);
            emission = VFXApplyPreExposure(emission, 1.0f);
            o.color.rgb += emission.rgb;
        #endif
        
        #if HAS_SHADERGRAPH_PARAM_ALPHA 
            o.color.a = OUTSG.${SHADERGRAPH_PARAM_ALPHA};
        #endif
#else
	
		#define VFX_TEXTURE_COLOR VFXGetTextureColor(VFX_SAMPLER(mainTexture),i)
		${VFXApplyColor}
		o.color = VFXApplyPreExposure(o.color, i);
#endif

		o.color = VFXApplyFog(o.color,i);
		VFXClipFragmentColor(o.color.a,i);
		o.color.a = saturate(o.color.a);
		o.color = VFXTransformFinalColor(o.color);
		
#if VFX_FEATURE_MOTION_VECTORS_FORWARD
		${VFXComputeOutputMotionVector}
		o.outMotionVector = encodedMotionVector;
        o.outMotionVector.a = o.color.a < i.VFX_VARYING_ALPHATHRESHOLD ? 0.0f : 1.0f; //Independant clipping for motion vector pass
#endif
		return o;
	}
	ENDHLSL
}