Hi all,

How would the python script for part look look if I wanted the material of a part to change colour to either green or red once a HMI Button is pressed. The original colour would be brass and each part as a property has the ID 1 (for green) or 2 (for red), which has to be manually inputted before the simulation and changes to the corresponding colour once the button is pressed.

This is how my python scripts look for the part looks (currently trying for one part). the part is brass when the simulation starts but stays brass when the button is pressed:
Part:

image501×301 25.7 KB

from vcScript import *

comp = getComponent()

def apply_material_recursive(node, material):
    node.MaterialInheritance = VC_MATERIAL_FORCE_INHERIT
    node.NodeMaterial = material
    for child in node.Children:
        apply_material_recursive(child, material)

def set_self_material(material):
    if material is None:
        return 
    apply_material_recursive(comp, material)


ts_id_prop = comp.getProperty("TS_ID")            # Integer: 1=green, 2=red (set manually)
brass_prop = comp.getProperty("Brass Material")   # Ref<Material>
green_prop = comp.getProperty("Green Material")   # Ref<Material>
red_prop   = comp.getProperty("Red Material")     # Ref<Material>

def set_brass():
    set_self_material(brass_prop.Value)

def reveal_color():
    ts_id = ts_id_prop.Value
    if ts_id == 1:
        set_self_material(green_prop.Value)
    elif ts_id == 2:
        set_self_material(red_prop.Value)
    else:
        set_brass()

def OnReset():
    set_brass()

def OnStart():
    set_brass()

def on_scan(signal):
    
    if signal.Value:
        reveal_color()

scan_in = comp.findBehaviour("ScanIn")  # Boolean Signal on the TS
if scan_in:
    scan_in.OnValueChange = on_scan

# Initial state
set_brass()

Thanks in advance!

It would be better to useOnSignalto trigger the script when the signal changes.

Don’t forget to add the connection between the Signal and the PythonScript (see the screenshot)

grafik1362×763 139 KB

Thank you for the response. I was wondering if the same could be done when the ray from the colour Sensor makes contact with the block. So the colour of the block only changes when the ray makes contact instead of using the button?

Thanks in advance

Color Sensor.vcmx(17.4 KB)