Output
Particles can also be given custom properties, which can then be queried again in Conditions, in Math or Data Mapper modifiers, for example, or offset against other properties of the particle. The Spline Emitter offers four properties for storage.
To use the corresponding storage, activate the option to the right of its name. A new custom property whose data type is compatible with the output value is automatically created and entered. These automatically generated custom properties are stored within the Scene Settings and their Particle Simulation Settings in the group for Automatic Custom Properties section.
However, you can also go to the group for Manual Custom Properties and manually create your custom properties there by yourself. You will find an arrow button behind the respective name field of the Output properties, which can be used to open a selection list of the available custom properties. These lists are automatically filtered to display only the custom properties of the simulation scene whose data types are compatible with the utput value.
You can find out more about the manual creation of user properties for saving and processing particle properties in the section on Particle Simulation Settings within the Scene Settings.
This bool information indicates with the value true if a particle has just been created. For subsequent images, the value should be automatically reset to false in order to only mark newly created particles with true. For this to work, a custom property of the Event Bool type must be assigned here. Activating the Born option automatically takes care of this. Alternatively, you can click on the arrow button next to the name field to select one of your manually created custom properties that also uses this data type.
This value lies between 0% and 100% and indicates the position along the assigned spline at which a particle was created. 0% stands for the start of a spline and 100% for its end. The Float - Percent data type is expected for storage. Activating the option automatically creates a custom property with a suitable data type. Alternatively, you can click on the arrow button next to the name field to select one of your manually created custom properties that also uses this data type.
This is only available in Along Mode and then indicates the position of origin of a particle on the corresponding spline segment with a numerical value between 0% and 100%. The value 0% stands for the start of a segment and the value 100% for its end. The Float - Percentage data type is expected for storage. Activating the option automatically creates a custom property with a suitable data type. Alternatively, you can click on the arrow button next to the name field to select one of your manually created custom properties that also uses this data type.
This is only available in Along Mode and then uses an integer value to specify the number of the segment on which a particle was created. The counting method starts at 0 for the first segment of the spline. The Index data type is expected for storage. Activating the option automatically creates a custom property with a suitable data type. Alternatively, you can click on the arrow button next to the name field to select one of your manually created custom properties that also uses this data type.