fog and lightning?

Scripting Issues
1

Doesn’t fog color get affected by lightning?

import direct.directbase.DirectStart
from pandac.PandaModules import *
from direct.interval.IntervalGlobal import *


env = loader.loadModel('environment')
env.reparentTo(render)

colour = (0.5,0.8,0.8)
expfog = Fog("Scene-wide exponential Fog object")
expfog.setColor(*colour)
expfog.setExpDensity(0.05)
render.setFog(expfog)
base.setBackgroundColor(*colour)

dlightnode = DirectionalLight('dlight')
dlight = render.attachNewNode(dlightnode)
dlightnode.setColor(Vec4(0.1,0.1,0.2,1))

alightnode = AmbientLight("ambient light")
alight = render.attachNewNode(alightnode)
alightnode.setColor(Vec4(0.1,0.1,0.2,1))

render.setLight(alight)
render.setLight(dlight)

def myFunction(t):
  dlightnode.setColor(t)
 
i = LerpFunc(myFunction,
		fromData= Vec4(0.1,0.1,0.2,1),
		toData= Vec4(1,1,1,1),
		duration= 3)
i.loop()


run()

The issue is, I want blue fog in the game during the day and dark blue during the night.

2 
def myFunction(t): 
  dlightnode.setColor(t)
  alightnode.setColor(t) 
  base.setBackgroundColor(t)

This worked for me

3

What worked? Did the fog change it’s color? Or is the background color the same as fog color?

4

i think therefor you need to write your own shader, which wouldnt be that hard btw. i ve never done it before, but it couldnt be that hard. by using the distance to the light as falloff, so you would reach a nice looking illuminated sphere around.

5

Sorry about the fault in the last reply…I forgot to put the code which change the fog color

The code what I meant is:

def myFunction(t): 
  dlightnode.setColor(t)
  alightnode.setColor(t) 
  base.setBackgroundColor(t) 
  expfog.setColor(t)

wish that is what you want

6

So your answer is

  1. no, fog doesnt change it’s color based on light
  2. you should change the fog color always when you also change the light color?
7
  1. Correct.
  2. If you want the fog color to be the same color as the light, then yes.

David

8

OK