${VFXBegin:VFXVertexCommonProcess}
#if VFX_USE_COLOR_CURRENT && defined(VFX_VARYING_COLOR)
o.VFX_VARYING_COLOR = attributes.color;
#endif
#if VFX_USE_ALPHA_CURRENT && defined(VFX_VARYING_ALPHA)
o.VFX_VARYING_ALPHA = attributes.alpha;
#endif

#ifdef VFX_VARYING_EXPOSUREWEIGHT
${VFXLoadParameter:{exposureWeight}}
o.VFX_VARYING_EXPOSUREWEIGHT = exposureWeight;
#endif

#if USE_SOFT_PARTICLE && defined(VFX_VARYING_INVSOFTPARTICLEFADEDISTANCE)
${VFXLoadParameter:{invSoftParticlesFadeDistance}}
o.VFX_VARYING_INVSOFTPARTICLEFADEDISTANCE = invSoftParticlesFadeDistance;
#endif

#if (USE_ALPHA_TEST || VFX_FEATURE_MOTION_VECTORS_FORWARD) && (!VFX_SHADERGRAPH || !HAS_SHADERGRAPH_PARAM_ALPHACLIPTHRESHOLD) && defined(VFX_VARYING_ALPHATHRESHOLD)
${VFXLoadParameter:{alphaThreshold}}
o.VFX_VARYING_ALPHATHRESHOLD = alphaThreshold;
#endif

#if USE_UV_SCALE_BIAS
${VFXLoadParameter:{uvScale}}
${VFXLoadParameter:{uvBias}}
#if defined (VFX_VARYING_UV)
o.VFX_VARYING_UV.xy = o.VFX_VARYING_UV.xy * uvScale + uvBias;
#endif
#endif

#ifdef VFX_VARYING_ANGLEFADE
${VFXLoadParameter:{angleFade}}
o.VFX_VARYING_ANGLEFADE = angleFade;
#endif

#ifdef VFX_VARYING_FADEFACTOR
${VFXLoadParameter:{fadeFactor}}
o.VFX_VARYING_FADEFACTOR = fadeFactor;
#endif

#ifdef VFX_VARYING_DECALLAYER
${VFXLoadParameter:{decalLayerMask}}
o.VFX_VARYING_DECALLAYER = decalLayerMask;
#endif

#if defined(VFX_VARYING_POSWS)
o.VFX_VARYING_POSWS = TransformPositionVFXToWorld(vPos);
#endif

#if VFX_USE_INSTANCING
    #ifdef UNITY_INSTANCING_ENABLED
    o.VFX_VARYINGS_INSTANCE_CURRENT_INDEX = unity_InstanceID;
    #endif
o.VFX_VARYINGS_INSTANCE_ACTIVE_INDEX = instanceActiveIndex;
#endif
${VFXEnd}

${VFXBegin:VFXGetRTScalingFactor}
float3 rtScale = float3(1,1,1);
#if VFX_USE_RT_CUSTOM_SCALE
    ${VFXLoadParameter:{rayTracedScaling}}
    rtScale = float3(rayTracedScaling, 1.0f);
#else
    #ifdef VFX_RT_DEFAULT_SCALE
        rtScale = VFX_RT_DEFAULT_SCALE;
    #endif
#endif
${VFXEnd}


${VFXBegin:VFXLoadSize}
float3 size3 = float3(attributes.size,attributes.size,attributes.size);
#if VFX_USE_SCALEX_CURRENT
size3.x *= attributes.scaleX;
#endif
#if VFX_USE_SCALEY_CURRENT
size3.y *= attributes.scaleY;
#endif
#if VFX_USE_SCALEZ_CURRENT
size3.z *= attributes.scaleZ;
#endif
${VFXEnd}

${VFXBegin:VFXLoadSizeRT}
float3 size3 = float3(attributes.size,attributes.size,attributes.size);
${VFXGetRTScalingFactor}
size3 *= rtScale;
#if VFX_USE_SCALEX_CURRENT
size3.x *= attributes.scaleX;
#endif
#if VFX_USE_SCALEY_CURRENT
size3.y *= attributes.scaleY;
#endif
#if VFX_USE_SCALEZ_CURRENT
size3.z *= attributes.scaleZ;
#endif
${VFXEnd}

${VFXBegin:VFXVertexSetFlipbooksInterpolants}
#if USE_FLIPBOOK && defined(VFX_VARYING_UV)
	#if USE_FLIPBOOK_ARRAY_LAYOUT
		${VFXLoadParameter:{flipBookSize}}
		#if USE_FLIPBOOK_INTERPOLATION
			VFXUVData uvData = GetUVData(flipBookSize, o.VFX_VARYING_UV.xy, attributes.texIndex, attributes.texIndexBlend);
		#else
			VFXUVData uvData = GetUVData(flipBookSize, o.VFX_VARYING_UV.xy, attributes.texIndex);
		#endif
		o.VFX_VARYING_UV.xyz = uvData.uvs.xyz;
		#if USE_FLIPBOOK_INTERPOLATION && defined(VFX_VARYING_UV) && defined (VFX_VARYING_FRAMEBLEND)
			o.VFX_VARYING_UV.w = uvData.uvs.w;
			o.VFX_VARYING_FRAMEBLEND = uvData.blend;
			#if USE_FLIPBOOK_MOTIONVECTORS && defined(VFX_VARYING_MOTIONVECTORSCALE)
				${VFXLoadParameter:{motionVectorScale}}
				o.VFX_VARYING_MOTIONVECTORSCALE = motionVectorScale;
			#endif
		#endif
	#else
		${VFXLoadParameter:{invFlipBookSize}}
		${VFXLoadParameter:{flipBookSize}}
		#if USE_FLIPBOOK_INTERPOLATION
			VFXUVData uvData = GetUVData(flipBookSize, invFlipBookSize, o.VFX_VARYING_UV.xy, attributes.texIndex, attributes.texIndexBlend);
		#else
			VFXUVData uvData = GetUVData(flipBookSize, invFlipBookSize, o.VFX_VARYING_UV.xy, attributes.texIndex);
		#endif
		o.VFX_VARYING_UV.xy = uvData.uvs.xy;
		#if USE_FLIPBOOK_INTERPOLATION && defined(VFX_VARYING_UV) && defined (VFX_VARYING_FRAMEBLEND)
			o.VFX_VARYING_UV.zw = uvData.uvs.zw;
			o.VFX_VARYING_FRAMEBLEND = uvData.blend;
			#if USE_FLIPBOOK_MOTIONVECTORS && defined(VFX_VARYING_MOTIONVECTORSCALE)
				${VFXLoadParameter:{motionVectorScale}}
				o.VFX_VARYING_MOTIONVECTORSCALE = motionVectorScale * invFlipBookSize;
			#endif
		#endif
	#endif
#endif
${VFXEnd}

${VFXBegin:VFXLoadAttributesOrCull}
#if HAS_STRIPS && !VFX_HAS_INDIRECT_DRAW
	// We render one particle less for each strip in this case
	nbMax -= STRIP_COUNT;
#endif

uint deadCount = 0;
#if USE_DEAD_LIST_COUNT
deadCount = deadList[instanceIndex];
#endif
#if VFX_USE_INSTANCING
if (index >= nbMax - deadCount)
#else
if (index >= asuint(nbMax) - deadCount)
#endif
{
	CULL_VERTEX(o);
}

VFXAttributes attributes = (VFXAttributes)0;
VFXSourceAttributes sourceAttributes = (VFXSourceAttributes)0;

#if VFX_HAS_INDIRECT_DRAW
if (index >= indirectBuffer[instanceActiveIndex])
{
	CULL_VERTEX(o);
}
index = indirectBuffer[VFXGetIndirectBufferIndex(index, instanceActiveIndex)];
#endif

#if HAS_STRIPS_DATA
StripData stripData;
uint relativeIndexInStrip = 0;
uint primitiveID = 0;
#if HAS_STRIPS
	primitiveID = id;
#endif

if (!FindIndexInStrip(index, primitiveID, instanceIndex, relativeIndexInStrip, stripData))
{
	CULL_VERTEX(o);
}
#endif

${VFXLoadAttributes}
#if !VFX_HAS_INDIRECT_DRAW && !HAS_STRIPS
if (!attributes.alive)
{
	CULL_VERTEX(o);
}
#endif

// Initialize built-in needed attributes
#if HAS_STRIPS_DATA
InitStripAttributes(index, attributes, stripData);
#endif
${VFXEnd}

${VFXBegin:VFXVertexComputeCurrentAndPreviousClipPos}
#if VFX_FEATURE_MOTION_VECTORS && defined(VFX_VARYING_VELOCITY_CPOS_PREVIOUS) && defined(VFX_VARYING_VELOCITY_CPOS)

#ifdef VFX_FEATURE_MOTION_VECTORS_VERTS
	o.VFX_VARYING_VELOCITY_CPOS_PREVIOUS = o.VFX_VARYING_VELOCITY_CPOS = (float2)0.0f;
#else
	o.VFX_VARYING_VELOCITY_CPOS_PREVIOUS = o.VFX_VARYING_VELOCITY_CPOS = float4(0.0f, 0.0f, 0.0f, 1.0f);
#endif

${VFXLoadParameter:{currentFrameIndex}}
uint elementToVFXBaseIndex;
if (TryGetElementToVFXBaseIndex(index, instanceIndex, elementToVFXBaseIndex, currentFrameIndex))
{
float4 cPos = TransformPositionVFXToNonJitteredClip(vPos);

#ifdef VFX_FEATURE_MOTION_VECTORS_VERTS
	o.VFX_VARYING_VELOCITY_CPOS_PREVIOUS = VFXGetPreviousClipPosition(elementToVFXBaseIndex, id).xy;
	o.VFX_VARYING_VELOCITY_CPOS = cPos.xy / cPos.w;
#else
	float4x4 previousElementToVFX = VFXGetPreviousElementToVFX(elementToVFXBaseIndex);
	float3 oldvPos = mul(previousElementToVFX, float4(inputVertexPosition, 1.0f)).xyz;
	o.VFX_VARYING_VELOCITY_CPOS_PREVIOUS = TransformPositionVFXToPreviousClip(oldvPos);
	o.VFX_VARYING_VELOCITY_CPOS = cPos;
#endif

}
#endif
${VFXEnd}

${VFXBegin:VFXVertexComputeDisplacement}
float displacement = 0.0;
#if VFX_FEATURE_MOTION_VECTORS
uint elementToVFXBaseIndex;
float3 previousWS;

${VFXLoadParameter:{currentFrameIndex}}
if (TryGetElementToVFXBaseIndex(index, instanceIndex, elementToVFXBaseIndex, currentFrameIndex))
{
    float4x4 previousElementToVFX = VFXGetPreviousElementToVFX(elementToVFXBaseIndex);
    previousWS = TransformPreviousVFXPositionToWorld(mul(previousElementToVFX, float4(inputVertexPosition, 1.0f)).xyz);
    displacement = length(currentWS - previousWS);
}
#endif
${VFXEnd}

${VFXBegin:VFXComputeOutputMotionVector}

//No w division with fast path of motion vectors
#ifdef VFX_FEATURE_MOTION_VECTORS_VERTS
float2 velocity = i.VFX_VARYING_VELOCITY_CPOS - i.VFX_VARYING_VELOCITY_CPOS_PREVIOUS;
#else
float2 velocity = (i.VFX_VARYING_VELOCITY_CPOS.xy/i.VFX_VARYING_VELOCITY_CPOS.w) - (i.VFX_VARYING_VELOCITY_CPOS_PREVIOUS.xy/i.VFX_VARYING_VELOCITY_CPOS_PREVIOUS.w);
#endif

#if UNITY_UV_STARTS_AT_TOP
	velocity.y = -velocity.y;
#endif
float4 encodedMotionVector = 0.0f;
VFXEncodeMotionVector(velocity * 0.5f, encodedMotionVector);
${VFXEnd}

${VFXBegin:VFXApplyColor}

float4 color = VFXGetFragmentColor(i);

#ifndef VFX_TEXTURE_COLOR
	#define VFX_TEXTURE_COLOR float4(1.0,1.0,1.0,1.0)
#endif

#if VFX_COLORMAPPING_DEFAULT
	o.color = color * VFX_TEXTURE_COLOR;
#endif

#if VFX_COLORMAPPING_GRADIENTMAPPED
	${VFXLoadParameter:{gradient}}
	o.color = SampleGradient(gradient, VFX_TEXTURE_COLOR.a * color.a) * float4(color.rgb,1.0);
#endif

${VFXEnd}

${VFXBegin:VFXDeclareGetStripTangent}
// Strips tangent computation
float3 GetParticlePosition(uint index, uint instanceIndex)
{
	VFXAttributes attributes = (VFXAttributes)0;
	${VFXLoadAttributes:{position}}
	return attributes.position;
}

float3 GetStripTangent(float3 currentPos, uint instanceIndex, uint relativeIndex, const StripData stripData)
{
	float3 prevTangent = (float3)0.0f;
	if (relativeIndex > 0)
	{
		uint prevIndex = GetParticleIndex(relativeIndex - 1,stripData);
		float3 tangent = currentPos - GetParticlePosition(prevIndex,instanceIndex);
		float sqrLength = dot(tangent, tangent);
		if (sqrLength > VFX_EPSILON * VFX_EPSILON)
			prevTangent = tangent * rsqrt(sqrLength);
	}

	float3 nextTangent = (float3)0.0f;
	if (relativeIndex + 1 < stripData.nextIndex)
	{
		uint nextIndex = GetParticleIndex(relativeIndex + 1,stripData);
		float3 tangent = GetParticlePosition(nextIndex, instanceIndex) - currentPos;
		float sqrLength = dot(tangent, tangent);
		if (sqrLength > VFX_EPSILON * VFX_EPSILON)
			nextTangent = tangent * rsqrt(sqrLength);
	}

	return normalize(prevTangent + nextTangent);
}
${VFXEnd}

${VFXBegin:VFXInitInstancing}
uint instanceIndex, instanceActiveIndex, instanceCurrentIndex;
index = VFXInitInstancing(index, instanceIndex, instanceActiveIndex, instanceCurrentIndex);
${VFXEnd}

${VFXBegin:VFXInitInstancingCompute}
uint instanceIndex, instanceActiveIndex, instanceCurrentIndex;
#if defined(VFX_INSTANCING_FIXED_SIZE)
	uint index = GetThreadId(groupId, 0, dispatchWidth);
	index = VFXInitInstancing(index, instanceIndex, instanceActiveIndex, instanceCurrentIndex);
	index += groupThreadId.x;
#else
	uint index = VFXInitInstancing(id, instanceIndex, instanceActiveIndex, instanceCurrentIndex);
#endif

${VFXEnd}

${VFXBegin:VFXInstancingConstants}
float4 instancingConstants;
uint2 instancingBufferOffsets;
${VFXEnd}

${VFXBegin:VFXFeedSortingKeys}
                Kvp output;
#if VFX_CUSTOM_SORT_KEY
                ${VFXLoadParameter:{sortKey}}
                output.sortKey = -1.0f * sortKey; //Lowest values are rendered first
#elif VFX_DISTANCE_SORT_KEY
#if VFX_LOCAL_SPACE
                float3 posRWS = TransformObjectToWorld(attributes.position);
#else
                float3 posRWS = GetCameraRelativePositionWS(attributes.position);
#endif
                float3 camToPos = posRWS - GetCurrentViewPosition();

                output.sortKey = dot(camToPos,camToPos); // sqr distance to the camera
#elif VFX_DEPTH_SORT_KEY
#if VFX_LOCAL_SPACE
                float3 posRWS = TransformObjectToWorld(attributes.position);
#else
                float3 posRWS = GetCameraRelativePositionWS(attributes.position);
#endif
                float3 zAxisCam = -GetWorldToViewMatrix()[2].xyz;
                float depth = dot(posRWS, zAxisCam);
                output.sortKey = depth;

#elif VFX_YOUNGEST_SORT_KEY
                ${VFXLoadAttributes:{age}}
                output.sortKey = attributes.age;

#endif //VFX_[CRITERION]_SORT_KEY
                output.index = index;
                output.sortKey *= SORTING_SIGN;
${VFXEnd}

${VFXBegin:VFXGetIndexFromRTPrimitiveIndex}
#ifdef VFX_RT_DECIMATION_FACTOR
int rayTracingDecimationFactor = VFX_RT_DECIMATION_FACTOR;
#else
int rayTracingDecimationFactor = 1;
#endif
uint index = PrimitiveIndex() * rayTracingDecimationFactor;
uint instanceIndex =  asuint(_InstanceIndex);
uint instanceActiveIndex = asuint(_InstanceActiveIndex);
VFXGetInstanceCurrentIndex(index);
${VFXEnd}

${VFXBegin:VFXDeclareAppendOutputIndirectBuffer}
void AppendOutputBuffer(RWStructuredBuffer<IndirectOutputType> outputBuffer, IndirectOutputType output, uint instanceActiveIndex, uint increment = 1)
{
    uint indirectIndex;

#if VFX_FEATURE_SORT
    InterlockedAdd(outputBuffer[instanceActiveIndex].index, increment, indirectIndex);
#else
    InterlockedAdd(outputBuffer[instanceActiveIndex], increment, indirectIndex);
#endif
    indirectIndex /= increment;
    indirectIndex += instancingBatchSize + instanceActiveIndex * RAW_CAPACITY;
    outputBuffer[indirectIndex] = output;
}
${VFXEnd}