How to perform operations on User Parameters?
Hi @ph0en1x01 .
Since the link you provided did not have a slider, I was unable to reproduce the situation.
Instead, I created a simple body using user parameters, and created a sample that allows the parameters to be changed by changing the slider.
# Fusion360API Python script
import traceback
import adsk
import adsk.core as core
import adsk.fusion as fusion
_app: core.Application = None
_ui: core.UserInterface = None
_handlers = []
CMD_INFO = {
'id': 'kantoku_test',
'name': 'test',
'tooltip': 'test'
}
_widthSliderIpt: core.FloatSliderCommandInput = None
_widthPrm: fusion.UserParameter = None
class MyCommandCreatedHandler(core.CommandCreatedEventHandler):
def __init__(self):
super().__init__()
def notify(self, args: core.CommandCreatedEventArgs):
core.Application.get().log(args.firingEvent.name)
try:
global _handlers
cmd: core.Command = core.Command.cast(args.command)
inputs: core.CommandInputs = cmd.commandInputs
# event
onDestroy = MyCommandDestroyHandler()
cmd.destroy.add(onDestroy)
_handlers.append(onDestroy)
onExecutePreview = MyExecutePreviewHandler()
cmd.executePreview.add(onExecutePreview)
_handlers.append(onExecutePreview)
# inputs
global _widthPrm
_widthPrm = create_base_body_with_parameter(
'Width',
1,
)
global _widthSliderIpt
_widthSliderIpt = inputs.addFloatSliderCommandInput(
'_widthSliderIptId',
'Width',
_widthPrm.unit,
0.01,
100,
False,
)
_widthSliderIpt.valueOne = _widthPrm.value
except:
_ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
class MyExecutePreviewHandler(adsk.core.CommandEventHandler):
def __init__(self):
super().__init__()
def notify(self, args: core.CommandEventArgs):
# update UserParameter
global _widthPrm, _widthSliderIpt
_widthPrm.expression = _widthSliderIpt.expressionOne
core.Application.get().activeViewport.fit()
args.isValidResult = True
class MyCommandDestroyHandler(core.CommandEventHandler):
def __init__(self):
super().__init__()
def notify(self, args: core.CommandEventArgs):
core.Application.get().log(args.firingEvent.name)
adsk.terminate()
def run(context):
try:
global _app, _ui
_app = core.Application.get()
_ui = _app.userInterface
cmdDef: core.CommandDefinition = _ui.commandDefinitions.itemById(
CMD_INFO['id']
)
if not cmdDef:
cmdDef = _ui.commandDefinitions.addButtonDefinition(
CMD_INFO['id'],
CMD_INFO['name'],
CMD_INFO['tooltip']
)
global _handlers
onCommandCreated = MyCommandCreatedHandler()
cmdDef.commandCreated.add(onCommandCreated)
_handlers.append(onCommandCreated)
cmdDef.execute()
adsk.autoTerminate(False)
except:
if _ui:
_ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
def create_base_body_with_parameter(
name: str,
value: float,
) -> fusion.UserParameter:
app: core.Application = core.Application.get()
des: fusion.Design = app.activeProduct
# create sketch
root: fusion.Component = des.rootComponent
skt: fusion.Sketch = root.sketches.add(
root.yZConstructionPlane
)
# create SketchCircle
circles: fusion.SketchCircles = skt.sketchCurves.sketchCircles
circles.addByCenterRadius(
core.Point3D.create(0,0,0),
5,
)
# create UserParameter
widthPrm: fusion.UserParameter = get_user_parameter(
name,
value,
)
# create ExtrudeFeature
extrudeFeats: fusion.ExtrudeFeatures = root.features.extrudeFeatures
extrudeFeats.addSimple(
skt.profiles[-1],
core.ValueInput.createByString(widthPrm.name),
fusion.FeatureOperations.NewBodyFeatureOperation,
)
return widthPrm
def get_user_parameter(
name: str,
value: float,
) -> fusion.UserParameter:
app: core.Application = core.Application.get()
des: fusion.Design = app.activeProduct
unitsMgr: core.UnitsManager = des.unitsManager
prm: fusion.UserParameter = des.userParameters.itemByName(name)
if prm:
return prm
return des.userParameters.add(
name,
core.ValueInput.createByReal(value),
unitsMgr.defaultLengthUnits,
'test'
)
I think it would be better to practice parametric modeling before the API.
The volume is too large to correct immediately.
Are the "EV Chassis Code" and "Slider Add-in Code" processed separately?
"pointB" is a Point3D object, but it is not possible to associate parameters with a Point3D object.
The "pointB" appears on the screen when it is created as an endpoint of "lineAB".
Therefore, you need to find the endpoint of "lineAB" in order to link it to the slider.
The sketch your script produces is not dimensionally constrained at all, so it may be difficult to locate.
That is what I meant when I stated "I think it would be better to practice parametric modeling before the API."
Hi,
Yes, you can a write a user parameter's expression making reference to any other user parameters.
Here you have an example:
Then you can use the new user parameter to dimension a sketch object.
The new user parameter will be updated as long as the dependent are updated.
Is this what you are looking for? Or what kind of mathematical operation do you need?
Regards,
Jorge Jaramillo
