This article documents an advanced feature of VisionScript that is not necessary for most users.
VisionScript features a built-in debugger for understanding how your code works and finding the source of errors.
The debugger triggers when a Breakpoint runs in a program. This command stops your code in place and creates an interactive environment in which you can debug.
To debug a program, first add a breakpoint to your script:
Load["./image.jpg"] Detect["cat"] Count Breakpoint Say
Then, run your program:
When your program reaches the breakpoint, the debugger will trigger.
The debugger looks like this:
[n,p,q,s,r,h] VisionScript Debug Mode >
The letters at the beginning are commands, which mean:
n: Prints the abstract syntax tree for the current line. Run the current line and go to the next one.
p: Go to the previous line.
q: Quit the debugger. This will start running your code until another breakpoint is run, if any. If no breakpoints are run, the program will run to completion.
r: List values in state that you can access.
s [state_value]: Show the value of a state. For example,
s detections_stackwill show the value of the
h: Show help.