Struggling on SetParameter for OLight

Reply to Struggling on SetParameter for OLight on Thu, 02 Feb 2023 11:22:39 GMT

mocoloco — Thu, 02 Feb 2023 11:22:39 GMT

Thanks a lot for the flags, it does work as expected now.
Are c4d.DESCFLAGS_GET_NONE and c4d.DESCFLAGS_GET_0 similars?

Cheers,
Christophe.

Reply to Struggling on SetParameter for OLight on Thu, 02 Feb 2023 09:24:35 GMT

m_adam — Thu, 02 Feb 2023 09:24:35 GMT

Hi @mocoloco for such a parameter, using the bracket operator will be more easy.
Find bellow the code within a Python Scripting tag, this work as expected.

from typing import Optional
import c4d

doc: c4d.documents.BaseDocument # The document evaluating this tag
op: c4d.BaseTag # The Python scripting tag
flags: int # c4d.EXECUTIONFLAGS
priority: int # c4d.EXECUTIONPRIORITY
tp: Optional[c4d.modules.thinkingparticles.TP_MasterSystem] # Particle system
thread: Optional[c4d.threading.BaseThread] # The thread executing this tag

def main() -> None:
    obj = op.GetObject()
    previousLightColor = obj[c4d.LIGHT_COLOR]
    print(previousLightColor)
    newLightColor = c4d.Vector(0.0, 1.0, 1.9)
    obj[c4d.LIGHT_COLOR] = newLightColor

But if you really want to use G/SetParameter you can do it with the code bellow. The issue with your code is that DESCFLAGS_GET_PARAM_GET mean to be used within the implementation to notify the system that this parameter have been already retrieved so no need to retrieve it again. So if you pass this flag as an input therefor you will have nothing in return.

    obj = op.GetObject()
    previousLightColor = obj.GetParameter(c4d.DescID(c4d.DescLevel(c4d.LIGHT_COLOR, c4d.DTYPE_VECTOR, 0)), c4d.DESCFLAGS_GET_NONE)
    print(previousLightColor)
    newLightColor = c4d.Vector(0.0, 0.0, 1.9)
    obj.SetParameter( c4d.DescID(c4d.DescLevel(c4d.LIGHT_COLOR, c4d.DTYPE_VECTOR, 0)), newLightColor, c4d.DESCFLAGS_SET_NONE )

Cheers,
Maxime.

Reply to Struggling on SetParameter for OLight on Wed, 01 Feb 2023 20:05:49 GMT

mocoloco — Wed, 01 Feb 2023 20:05:49 GMT

Little addition after looking for a solution and reading more on OLight, it seems that the correct data type is c4d.DTYPE_VECTOR instead of c4d.DTYPE.COLOR. But even with this I can't reach the value.

 # TAG Execute() method
def Execute(self, tag, doc, op, bt, priority, flags):
    self.tagData = tag.GetDataInstance()
    sim_color = c4d.Vector(0) # For debug purpose, set a black color value

    if op.GetType() == c4d.Olight:
        # For debug purpose  
        print( op.GetParameter( c4d.DescID(c4d.DescLevel(c4d.LIGHT_COLOR, c4d.DTYPE_VECTOR, 0)), c4d.DESCFLAGS_GET_PARAM_GET ) )

        op.SetParameter( c4d.DescID(c4d.DescLevel(c4d.LIGHT_COLOR, c4d.DTYPE_VECTOR, 0)), sim_color, c4d.DESCFLAGS_SET_USERINTERACTION )
    
        return c4d.EXECUTIONRESULT_OK