/// <inheritdoc />
public override int BuildVertexBuffer(ParticleVertexBuilder vtxBuilder, Vector3 invViewX, Vector3 invViewY, ref Vector3 spaceTranslation, ref Quaternion spaceRotation, float spaceScale, ParticleSorter sorter)
{
SamplerPosition?.UpdateChanges();
SamplerSize?.UpdateChanges();
return(0);
}
/// <summary>
/// Gets the combined position for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle"></param>
/// <param name="positionField"></param>
/// <param name="lifeField">Normalized life for sampling</param>
/// <returns>Particle's current 3D position</returns>
protected unsafe Vector3 GetParticlePosition(Particle particle, ParticleFieldAccessor <Vector3> positionField, ParticleFieldAccessor <float> lifeField)
{
if (SamplerPosition == null)
{
return(particle.Get(positionField));
}
var life = 1f - (*((float *)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return(particle.Get(positionField) + SamplerPosition.Evaluate(life));
}
/// <inheritdoc />
public override void PreUpdate()
{
SamplerPosition?.UpdateChanges();
SamplerSize?.UpdateChanges();
}
