protected override void PrepareProperties(MaterialProperties materialProperties)
{
base.PrepareProperties(materialProperties);
positionsProperty = materialProperties.GetComputeBufferProperty("_Positions");
positionsLengthProperty = materialProperties.GetFloatProperty("_PositionsLength");
widthProperty = materialProperties.GetFloatProperty("_Width");
objectToClipProperty = materialProperties.GetMatrixProperty("objectToClip");
clipToObjectProperty = materialProperties.GetMatrixProperty("clipToObject");
}