static public VFXExpression FixedRandom(VFXExpression hash, VFXSeedMode mode)
{
VFXExpression seed = new VFXExpressionBitwiseXor(hash, VFXBuiltInExpression.SystemSeed);
if (mode != VFXSeedMode.PerComponent)
{
seed = new VFXExpressionBitwiseXor(new VFXAttributeExpression(mode == VFXSeedMode.PerParticle ? VFXAttribute.ParticleId : VFXAttribute.StripIndex), seed);
}
return(new VFXExpressionFixedRandom(seed));
}
static public VFXExpression BuildRandom(VFXSeedMode seedMode, bool constant, RandId randId, VFXExpression seed = null)
{
if (seedMode == VFXSeedMode.PerParticleStrip || constant)
{
if (seed == null)
{
throw new ArgumentNullException("seed");
}
return(FixedRandom(seed, seedMode));
}
return(new VFXExpressionRandom(seedMode == VFXSeedMode.PerParticle, randId));
}
static public VFXExpression FixedRandom(uint hash, VFXSeedMode mode)
{
return(FixedRandom(VFXValue.Constant <uint>(hash), mode));
}
