/// <inheritdoc /> public unsafe override void BuildUVCoordinates(ref ParticleBufferState bufferState, ref ParticleList sorter, AttributeDescription texCoordsDescription) { var lifeField = sorter.GetField(ParticleFields.RemainingLife); if (!lifeField.IsValid()) { return; } var texAttribute = bufferState.GetAccessor(texCoordsDescription); if (texAttribute.Size == 0 && texAttribute.Offset == 0) { return; } var texDefault = bufferState.GetAccessor(bufferState.DefaultTexCoords); if (texDefault.Size == 0 && texDefault.Offset == 0) { return; } foreach (var particle in sorter) { var normalizedTimeline = 1f - *(float *)(particle[lifeField]); Vector4 uvTransform = Vector4.Lerp(StartFrame, EndFrame, normalizedTimeline); uvTransform.Z -= uvTransform.X; uvTransform.W -= uvTransform.Y; bufferState.TransformAttributePerSegment(texDefault, texAttribute, this, ref uvTransform); bufferState.NextSegment(); } bufferState.StartOver(); }