pencilbox-py

• PencilBox is a Virtual Machine for HTML canvas plotting.
• This is a PencilBox bytecodes compiler written in Python.

Environment

Python3

How to use

Example: basic plotting

from dsl import op
from compiler import Compiler

compiler = Compiler()
compiler.compile(
  op.beginPath(),
  op.rect(0, 0, 50, 50),
  op.arc(25, 25, 25, 0, 1.5 * 3.14159265359),
  op.closePath(),
  op.strokeStyle('red'),
  op.stroke()
)
bytecodes = compiler.output() # We get list of bytecodes here

Example: fibonacci

from dsl import op
from compiler import Compiler

code = op.scope(
      'fib',
      op.func('n')(
        op.ifElse(
          op.lt(op.get('n'), 2),
          op.get('n'),
          op.add(
            op.apply(op.get('fib'), op.sub(op.get('n'), 1)),
            op.apply(op.get('fib'), op.sub(op.get('n'), 2))
          )
        )
      )
    )(
      op.print('fib 30 of pencilbox', op.apply(op.get('fib'), 30))
    )

compiler = Compiler()
compiler.compile(code)
bytecodes = compiler.output() # We get list of bytecodes here

Using bytecodes

Once the bytecodes is generated, it should be passed to PencilBox runtime in browser to run the program. Please checkout the PencilBox runtime How to use