Procedure

Realsoft Graphics Oy		Procedure
	VSL Objects

This VSL object defines a general purpose VSL function which can be called from other VSL code. Procedures can be created only into VSL Procedure Library objects. A procedure has the following properties:

Name - A name for the procedure. You can set it to describe the purpose of the included VLS code. For example "Gamma Correction", "SuperNoise" etc.
Parameters - Procedures cannot refer to any external data, all channel information must be passed in and out using parameters. The Parameter tab of the VSL editor has the following controls:
- Parameter List - The complete list of procedure parameters.
- Add - Adds a new parameter to the procedure.
- Delete - Removes the selected parameter. Note: If there is already VSL code calling the procedure, their Call parameters will not be automatically remapped.
- Parameter Name - It is a good idea to give descriptive names to parameters, especially if the procedure has many of them. You can then easily regognize the parameters later when defining calls to the procedure.
- Variable Type - The data type of the selected parameter. You can guide the program to use appropriate gadgets for parameters by setting the type. For example, if the procedure defines a color transformation, you may set its input parameter type to Color. Then for example Constant and Linear VSL objects show you a color gadget when you assign a value to the parameter.


Operation		Random