I made a really simple live coder in Panda3D:
import os
import sys
import builtins
from direct.showbase.ShowBase import ShowBase
from panda3d.core import NodePath
# Reset ShowBase so updated code has a clean slate.
def reset():
# Needs a lot more resetting.
# Like aspect2d, render2d, accept, etc.
print("Resetting showbase...")
builtins.render = base.render = NodePath("render")
for task in base.task_mgr.getTasks():
if not task in base.base_tasks:
task.remove()
base.camera.reparent_to(base.render)
base.cam.reparent_to(base.camera)
base.cam.clear_transform()
base.camera.clear_transform()
base.win.set_clear_color((0.1,0.1,0.1,1))
#
def update(filename, task):
stamp = os.stat(filename).st_mtime
if stamp != base.old_stamp:
print("File modified.")
base.old_stamp = stamp
reset()
try:
print("Executing.")
exec(open(filename, 'r').read())
except Exception as e:
print(e)
base.win.set_clear_color((0.3,0.1,0.1,1))
finally:
print("Execution succesful.\n")
return task.cont
# Wrap the task in a task that looks for exceptions.
# This way ShowBase keeps running even when adding a broken task.
def new_add(func, name=None, sort=None, extraArgs=[], priority=None, uponDeath=None, appendTask=False, taskChain=None, owner=None, delay=None):
def task(func, extraArgs, task=None):
try:
if task:
return func(*extraArgs, task)
else:
return func(*extraArgs)
except Exception as e:
print("Error in task: "+str(func), e)
return task.done
base.task_mgr.og_add(task, name, sort, extraArgs=[func, extraArgs], priority=priority, uponDeath=uponDeath, appendTask=True, taskChain=taskChain, owner=owner, delay=delay)
base = ShowBase()
base.old_stamp = 0
try:
file = sys.argv[1]
dirname = os.path.dirname(file)
basename = os.path.basename(file)
sys.path.append(dirname)
except:
raise NameError("No filename.")
base.task_mgr.add(update, extraArgs=[file], appendTask=True)
base.base_tasks = []
for task in base.task_mgr.getTasks():
base.base_tasks.append(task)
base.task_mgr.og_add = base.task_mgr.add
base.task_mgr.add = new_add
base.run()
python main.py /path/to/your/script.py
Basically it looks if the script is modified and if it is, resets showbase (sorta), and runs the modified script.
This way you can keep a panda3d window open when fiddling with your code. Needless to say this is going to make working with procedural generation a lot more convenient.
