# ParticleSystemVertexStream > All possible Particle System vertex shader inputs. ## Definition * **Type:** Enum * **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md) * **Assembly:** UnityEngine.ParticleSystemModule ```csharp public enum ParticleSystemVertexStream ``` ## Fields | Value | Description | | -------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [AgePercent](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/agepercent.md) | The normalized age of each particle, from 0 to 1. | | [AnimBlend](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/animblend.md) | The amount to blend between animated texture frames, from 0 to 1. | | [AnimFrame](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/animframe.md) | The current animation frame index of each particle. | | [Center](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/center.md) | The center position of the entire particle, in world space. | | [Color](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/color.md) | The color of each particle. | | [ColorPackedAsTwoFloats](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/colorpackedastwofloats.md) | The color of each particle, packed in a special format to allow decoding on GPUs that do not support bit-packing operations. | | [Custom1X](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom1x.md) | One custom value for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom1XY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom1xy.md) | Two custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom1XYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom1xyz.md) | Three custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom1XYZW](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom1xyzw.md) | Four custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom2X](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom2x.md) | One custom value for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom2XY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom2xy.md) | Two custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom2XYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom2xyz.md) | Three custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [Custom2XYZW](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/custom2xyzw.md) | Four custom values for each particle, defined by the Custom Data Module, or [ParticleSystem.SetCustomParticleData](/engine/6000.7/script-reference/unityengine/particlesystem/setcustomparticledata.md). | | [InvStartLifetime](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/invstartlifetime.md) | The reciprocal of the starting lifetime, in seconds (1.0f / startLifetime). | | [MeshAxisOfRotation](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/meshaxisofrotation.md) | The axis of rotation used by mesh particles when not using 3D rotation. | | [MeshIndex](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/meshindex.md) | The index of the mesh used by the current particle. | | [NextTrailCenter](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/nexttrailcenter.md) | The center of the next trail position, connected to the current position. | | [NoiseImpulseX](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noiseimpulsex.md) | The X axis noise on the current frame. | | [NoiseImpulseXY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noiseimpulsexy.md) | The X and Y axis noise on the current frame. | | [NoiseImpulseXYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noiseimpulsexyz.md) | The 3D noise on the current frame. | | [NoiseSumX](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noisesumx.md) | The accumulated X axis noise, over the lifetime of the particle. | | [NoiseSumXY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noisesumxy.md) | The accumulated X and Y axis noise, over the lifetime of the particle. | | [NoiseSumXYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/noisesumxyz.md) | The accumulated 3D noise, over the lifetime of the particle. | | [Normal](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/normal.md) | The vertex normal of each particle. | | [ParticleIndex](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/particleindex.md) | The index of the current particle in the particle data array. | | [PercentageAlongTrail](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/percentagealongtrail.md) | The percentage along the trail, in the range 0-1. | | [Position](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/position.md) | The position of each particle vertex, in world space. | | [PreviousTrailCenter](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/previoustrailcenter.md) | The center of the previous trail position, connected to the current position. | | [Rotation](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/rotation.md) | The Z axis rotation of each particle. | | [Rotation3D](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/rotation3d.md) | The 3D rotation of each particle. | | [RotationSpeed](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/rotationspeed.md) | The Z axis rotational speed of each particle. | | [RotationSpeed3D](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/rotationspeed3d.md) | The 3D rotational speed of each particle. | | [SizeX](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/sizex.md) | The X axis size of each particle. | | [SizeXY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/sizexy.md) | The X and Y axis sizes of each particle. | | [SizeXYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/sizexyz.md) | The 3D size of each particle. | | [Speed](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/speed.md) | The speed of each particle, calculated by taking the magnitude of the velocity. | | [StableRandomX](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/stablerandomx.md) | A random number for each particle, which remains constant during their lifetime. | | [StableRandomXY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/stablerandomxy.md) | Two random numbers for each particle, which remain constant during their lifetime. | | [StableRandomXYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/stablerandomxyz.md) | Three random numbers for each particle, which remain constant during their lifetime. | | [StableRandomXYZW](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/stablerandomxyzw.md) | Four random numbers for each particle, which remain constant during their lifetime. | | [Tangent](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/tangent.md) | The tangent vector for each particle (for normal mapping). | | [TrailWidth](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/trailwidth.md) | The width of the trail. | | [UV](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/uv.md) | The first UV stream of each particle. | | [UV2](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/uv2.md) | The second UV stream of each particle. | | [UV3](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/uv3.md) | The third UV stream of each particle (only for meshes). | | [UV4](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/uv4.md) | The fourth UV stream of each particle (only for meshes). | | [VaryingRandomX](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/varyingrandomx.md) | A random number for each particle, which changes during their lifetime. | | [VaryingRandomXY](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/varyingrandomxy.md) | Two random numbers for each particle, which change during their lifetime. | | [VaryingRandomXYZ](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/varyingrandomxyz.md) | Three random numbers for each particle, which change during their lifetime. | | [VaryingRandomXYZW](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/varyingrandomxyzw.md) | Four random numbers for each particle, which change during their lifetime. | | [Velocity](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/velocity.md) | The velocity of each particle, in world space. | | [VertexID](/engine/6000.7/script-reference/unityengine/particlesystemvertexstream/vertexid.md) | The vertex ID of each particle. |