OSL ‐ Program Flow

Main Loop Label:

• mainloop::
  • This is a label that serves as the entry point for an application's script after the first run cycle. It's where the program starts running after the initial setup.

Conditional Statements (if):

• if condition (commands):
  • The if statement is used to test a condition. If the condition is true, the code within the block (enclosed in parentheses) is executed.

if condition (
   command
   command
)

---

if condition (
   command
   command
) else (
   command
   command
)

---

if condition "command"

---

if condition "command" else "command"

Looping Constructs (loop):

• loop number-of-times (commands):

  • The loop statement is used to repeat a block of code a specified number of times.
  • Example: loop number-of-times (

• until condition (commands):

  • The until statement is used to repeat a block of code until a condition is met.
  • Example: until boolean (

Control Flow (goto and label):

• goto "label_name":

  • The goto command is used to jump to a specified label within the script.
  • Example: goto "label_name"

• label_name::

  • The label command defines a label that can be used as a target for the goto command.

Including External Files:

• import "file_path" or import "file_name" "file_type":
  • The import command is used to run another OSL file's data. You can specify the file by its path or name and type.

Running Commands in a JSON Array:

• run ["command","command2"]:
  • The run command is used to loop through a JSON array and execute the specified commands inside the array.