Hey guys,
saw this post: [url]fade from one camera to another?]
And it gave me a good idea on how to fade from one camera perspective to another, and so I wrote a small script (mostly a function) that will do this for you, it’s pretty simply and has a really pleasing effect.
EDIT (script updated): Fixed the clear color of the buffer so that the previous scene never shows through
Here it is (No models / textures required for it):
#- Start panda
import direct.directbase.DirectStart
#- Basic imports needed for this function
from direct.interval.IntervalGlobal import *
from panda3d.core import Point3, Vec3, CardMaker
#- Display a model, load your scene, idk
panda = loader.loadModel('environment')
panda.reparentTo(render)
#- Disable mouse driven camera, so that calls to camera.setPos, etc work
base.disableMouse()
#- Our fadeCamera function, this fades the currently viewed scene to a new camera perspective
#- over a period of (fadeInDuration) seconds
def fadeCamera(pos, rot, fadeInDuration = 1.0):
#- Create a new live texture buffer that will render the new camera perspective each frame
#- while we are fading the new camera perspective into full view
buffer2 = base.win.makeTextureBuffer('mybuffer', base.win.getXSize(), base.win.getYSize())
buffer2.setClearColorActive(True) #- Enable the clear color, so that the background color is shown
col = base.getBackgroundColor() #- Get the current background color
col[3] = 1 #- Make 100% sure that the background color is solid (otherwise the previos scene will show through)
buffer2.setClearColor(col) #- Set the clear color to it now
#- Create a new camera, for the buffer, and position/rotate it to the new perspective
cam2 = base.makeCamera(buffer2)
cam2.reparentTo(render)
cam2.setPos(pos)
cam2.setHpr(rot)
#- Create a fullscreen card for displaying the live scene (from the new camera perspective)
cm = CardMaker('displayCard')
cm.setFrame(-1, 1, -1, 1)
cm.setUvRange(buffer2.getTexture()) #- Make sure we set the UV range properly!
card = render2d.attachNewNode(cm.generate())
card.setTransparency(True)
card.setTexture(buffer2.getTexture())
#- Here is where the magic happens
#- First fade the card with the live scene texture in
#- Then move the actual camera
#- Then cleanup the temporary camera, the card for displaying the live scene, and the buffer
#- Perform all of these in order, using a Sequence
fadeCardIn = card.colorScaleInterval(fadeInDuration, 1, 0)
moveActualCamera = Func(camera.setPosHpr, render, cam2.getPos(), cam2.getHpr())
cleanupCamera = Func(cam2.remove)
cleanupCard = Func(card.remove)
cleanupBuffer = Func(base.graphicsEngine.removeWindow, buffer2)
Sequence(fadeCardIn, moveActualCamera, cleanupCard, cleanupCamera, cleanupBuffer).start()
#- Place the camera at one perspective
camera.setPosHpr(Point3(6.3, -45.9, 7.8), Vec3(0, 0, 0))
print 'Performing initial fade!'
fadeCamera(Point3(99, -851, 150), Vec3(7, -10, 0)) #- Do our initial fade
def doRandomFade():
#- Just get a random position / rotation for the new camera perspective
#- This part is really un-important
import random
p = Point3(random.randrange(-900, 900), random.randrange(-900, 900), random.randrange(90, 190))
tmp = render.attachNewNode('tmp')
tmp.setPos(p)
tmp.lookAt(0, 0, 0)
r = tmp.getHpr()
tmp.remove()
#- Actuall fade to the new position and rotation for the camera perspective
fadeCamera(p, r)
print 'Performing random fade!'
#- Set it such that when the user presses space it goes to the new perspective
base.accept('space', doRandomFade)
run()Hope this helps,
~powerpup118