Preliminary understanding of Panda3D fog

function Panda Example Infinite-Tunnel, Infinite tunnel ; A moving , There is no end to the tunnel ;

Toggle Fog, The swappable Fog The color of the ;Fog Can show or not show ;Fog Color switchable ;

  Take a look at the code for this example , The main function code has three parts ; Load model , Model animation , The effect of superimposing fog ; Fog ,Fog;

Part by part , Have a look first Fog How do you do it? ;

Fog,Panda Provide a class ; The manual is described below ;

from panda3d.core import Fog
classFog
Bases: PandaNode

    Specifies how atmospheric fog effects are applied to geometry. The Fog object is now a PandaNode, which means it can be used similarly to a Light to define effects relative to a particular coordinate system within the scene graph.
 

The basic fog procedure is as follows ;

from math import pi, sin, cos
from direct.showbase.ShowBase import ShowBase
from direct.task import Task
from panda3d.core import Point3
from panda3d.core import Fog

class MyApp(ShowBase):
    def __init__(self):
        ShowBase.__init__(self)

        self.fog = Fog('myFog1')
        self.fog.setColor(0, 0.5, 0)
        self.fog.setExpDensity(.08)
        #self.fog.setLinearRange(0, 320)
        #self.fog.setLinearFallback(45, 160, 320)
        render.setFog(self.fog)
          
app = MyApp()
app.run()

    Indent and adjust yourself ; If the indentation is not correct, it cannot be compiled ; Don't comment it out first 2 sentence , Make a basic fog ,Fog;

    Define a Fog object , Set the color , Set transparency ;

The effect is as follows ;

    Fog , It should be a vague effect , The concentration of each part varies ; Add the notes 2 sentence , The effect is still the same ;

According to its manual ,Panda Support 3 There are two modes of Fog, Exponential type 、 linear 、 Exponential square ;self.fog.setLinearRange(0, 320), This sentence is to set the linear range ; Set or no effect ;

Make an exponential Fog, The basic code is as follows ;

        myfog=Fog("fog1")
        myfog.setColor(0.8, 1, 0.5)
        myfog.setExpDensity(0.05)
        render.setFog(myfog)

It doesn't work ;setExpDensity, Set the exponential concentration of fog ;

The model of this example uses pview Look at the following ; I don't know how to make the tunnel effect ; Go on next time ;