Copy Data dynamics node

The number of copies of the input data items this node should create.

If this value is less than or equal to zero, no data is output from this node. As with other data manipulation nodes, this node always knows which simulation object is being modified at any given time. This means that the object specific local variables can be used in this parameter to change the number of copies on a per-object basis.

Sets the number of global parameters that will be set for each copy of the input data that is created.

These global parameters are accessible from the input data node using the stamp expression function.

The name for this variable. This is the value that must be passed as the second argument to the stamp expression function to access this variable.

Controls the way in which this variable is evaluated.

Specifies whether the global parameter is a floating point number or a string value.

For a Float Variable Type, when the Variable Evaluation is not Evaluate Once, One Token Per Copy, this parameter controls the value that will be assigned to this global parameter.

For a String Variable Type, or when the Variable Evaluation is Evaluate Once, One Token Per Copy, this parameter contains the string value or series of numeric or string tokens that will be used to set the value of this global parameter.

The inputs to this node supply the data that are to be copied.

The output from this node is a collection of data, with the specified number of copies of each of the input data.

The current copy number. You can use this variable in expressions to get different values for different copies.

The total number of copies to be made.

This value is the simulation time for which the node is being evaluated.

This value may not be equal to the current Houdini time represented by the variable T, depending on the settings of the DOP Network Offset Time and Time Scale parameters.

This value is guaranteed to have a value of zero at the start of a simulation, so when testing for the first timestep of a simulation, it is best to use a test like $ST == 0 rather than $T == 0 or $FF == 1.

This value is the simulation frame (or more accurately, the simulation time step number) for which the node is being evaluated.

This value may not be equal to the current Houdini frame number represented by the variable F, depending on the settings of the DOP Network parameters. Instead, this value is equal to the simulation time (ST) divided by the simulation timestep size (TIMESTEP).

This value is the size of a simulation timestep. This value is useful to scale values that are expressed in units per second, but are applied on each timestep.

This value is the inverse of the TIMESTEP value. It is the number of timesteps per second of simulation time.

This is the number of objects in the simulation. For nodes that create objects such as the Empty Object node, this value will increase for each object that is evaluated.

A good way to guarantee unique object names is to use an expression like object_$SNOBJ.

This value is the number of objects that will be evaluated by the current node during this timestep. This value will often be different from SNOBJ, as many nodes do not process all the objects in a simulation.

This value may return 0 if the node does not process each object sequentially (such as the Group DOP).

This value is the index of the specific object being processed by the node. This value will always run from zero to NOBJ-1 in a given timestep. This value does not identify the current object within the simulation like OBJID or OBJNAME, just the object’s position in the current order of processing.

This value is useful for generating a random number for each object, or simply splitting the objects into two or more groups to be processed in different ways. This value will be -1 if the node does not process objects sequentially (such as the Group DOP).

This is the unique object identifier for the object being processed. Every object is assigned an integer value that is unique among all objects in the simulation for all time. Even if an object is deleted, its identifier is never reused.

The object identifier can always be used to uniquely identify a given object. This makes this variable very useful in situations where each object needs to be treated differently. It can be used to produce a unique random number for each object, for example.

This value is also the best way to look up information on an object using the dopfield expression function. This value will be -1 if the node does not process objects sequentially (such as the Group DOP).

This string contains a space separated list of the unique object identifiers for every object being processed by the current node.

This string contains a space separated list of the names of every object being processed by the current node.

This value is the simulation time (see variable ST) at which the current object was created.

Therefore, to check if an object was created on the current timestep, the expression $ST == $OBJCT should always be used. This value will be zero if the node does not process objects sequentially (such as the Group DOP).

This value is the simulation frame (see variable SF) at which the current object was created.

This value is equivalent to using the dopsttoframe expression on the OBJCT variable. This value will be zero if the node does not process objects sequentially (such as the Group DOP).

This is a string value containing the name of the object being processed.

Object names are not guaranteed to be unique within a simulation. However, if you name your objects carefully so that they are unique, the object name can be a much easier way to identify an object than the unique object identifier, OBJID.

The object name can also be used to treat a number of similar objects (with the same name) as a virtual group. If there are 20 objects named “myobject”, specifying strcmp($OBJNAME, "myobject") == 0 in the activation field of a DOP will cause that DOP to operate only on those 20 objects. This value will be the empty string if the node does not process objects sequentially (such as the Group DOP).

This is a string value containing the full path of the current DOP Network. This value is most useful in DOP subnet digital assets where you want to know the path to the DOP Network that contains the node.