Rasagar/Library/PackageCache/com.unity.visualeffectgraph/Documentation~/Block-ConstantRate.md

Constant Rate

Menu Path : Spawn > Constant Rate

The Constant Rate Block adds a spawn count over time at a constant rate. For instance, if the rate is 10, this Block tiggers 10 spawn events per second for its Spawn Context. A rate below one is also valid, if the rate is 0.5, the rate is once every two seconds.

Block compatibility

This Block is compatible with the following Contexts:

• Spawn

Block properties

Input	Type	Description
Rate	float	The spawn rate per second.

Remarks

You can emulate this Block with the following equivalent custom spawner callback implementation:

class ConstantRateEquivalent : VFXSpawnerCallbacks
{
    public class InputProperties
    {
        [Min(0), Tooltip("Sets the number of particles to spawn per second.")]
        public float Rate = 10;
    }

    static private readonly int rateID = Shader.PropertyToID("Rate");

    public sealed override void OnPlay(VFXSpawnerState state, VFXExpressionValues vfxValues, VisualEffect vfxComponent)
    {
    }

    public sealed override void OnUpdate(VFXSpawnerState state, VFXExpressionValues vfxValues, VisualEffect vfxComponent)
    {
        if (state.playing)
        {
            float currentRate = vfxValues.GetFloat(rateID);
            state.spawnCount += currentRate * state.deltaTime;
        }
    }

    public sealed override void OnStop(VFXSpawnerState state, VFXExpressionValues vfxValues, VisualEffect vfxComponent)
    {
    }
}