How it works new CalcGradientPixel?

mikeudin

Hello guys!
Here is my old versions Python Node code that was working perfectly before v2024:

import c4d

def main():
    global Color,Alpha,AlphaGradient

    Color = Alpha = c4d.Vector()
    AlphaGradient = Gradient.GetAlphaGradient()

    irs = c4d.modules.render.InitRenderStruct()

    if Gradient.InitRender(irs):
        Color = Gradient.CalcGradientPixel(Position)
        Gradient.FreeRender()

    if AlphaGradient and AlphaGradient.InitRender(irs):
        Alpha = AlphaGradient.CalcGradientPixel(Position)
        AlphaGradient.FreeRender()

Now following a new API changes this code:

import c4d

def main():
    global Color,Alpha,AlphaGradient

    Color = Alpha = c4d.Vector()
    AlphaGradient = Gradient.GetAlphaGradient()

    irs = c4d.modules.render.InitRenderStruct()

    if Gradient:
        Color = Gradient.PrepareRenderData(irs).CalcGradientPixel(Position)

    if AlphaGradient:
        Alpha = AlphaGradient.PrepareRenderDataWithAlpha(irs).CalcGradientPixel(Position)

Traceback (most recent call last):
  File "Gradient", line 14, in main
Exception: no converter found for 'net.maxon.interface.gradientrenderdata-C'

How it works a new Gradient now?

m_adam

Hi, @mikeudin, you need to import maxon

Cheers,
Maxime.

llealloo

I am kind of surprised there isn't an easier way to sample a Gradient by a normalized 0-1 position

Anyway, thanks @mikeudin for the snippet and @m_adam for the fix