Hello everyone,
I’ve been interested in Panda3D for a while, I plan to take the plunge now.
I’m going to have lots of questions to ask about Panda3D.
I’m using (I’m a complete beginner, sorry) for now I’m building a little Python script (version 3) that uses the Render Pipeline. I would like to interface with QPanda3D but I can’t, can you help me?
from panda3d.core import load_prc_file_data
from direct.showbase.ShowBase import ShowBase
from rpcore import RenderPipeline
#from direct.gui.OnscreenText import OnscreenText
class Application(ShowBase):
def __init__(self) :
#ShowBase.__init__(self)
# Résolution
# Titre de la fenêtre
load_prc_file_data("", """
win-size 1600 900
window-title Essai
""")
self.posZ_modele = -0.7
self.posZ_camera = 0.7
self.render_pipeline = RenderPipeline()
self.render_pipeline.create(self)
self.render_pipeline.daytime_mgr.time = "17:30"
model = self.loader.load_model("salle_expo_001.bam")
model.reparent_to(self.render)
self.render_pipeline.prepare_scene(model)
model.setScale(1, 1, 1)
self.x = 0
self.y = 0
self.z = self.posZ_camera
model.setPos(self.x, self.y, self.posZ_modele)
#base.disableMouse()
base.camera.setPos(0, 0, self.posZ_camera)
base.camLens.setFov(102)
Application().run()
Thanks in advance.
First of all, welcome to the forum! I hope that you enjoy your time here! 
I’ve never used QPanda3D (that I recall) myself, but based on a quick search it looks like it may have its own classes from which you’re expected to inherit in place of the baseline Panda3D classes such as ShowBase.
It might be worth looking to QPanda3D’s documentation for a tutorial, or example code, perhaps.
Hello Thaumaturge,
This works by loading the standard (panda) model but I can’t adapt it for Render Pipeline use.
Well, it looks like the “Panda3DWorld” class inherits from the “ShowBase” class, so I would imagine that you would pass your instance of the former to RenderPipeline’s “create” method–i.e. that it would work just as in the code that you gave in the first post.
What precisely is the issue that you’re encountering in applying RenderPipeline to the example in your post just above this one? Knowing what’s going wrong, or where you’re stuck, might give me some direction in offering suggestions.
That said, do note that I don’t use RenderPipeline myself, so I may end up bowing out in favour of awaiting another forum-member who knows it better.
Thaumaturge I adapted a very simple exemple here :
from QPanda3D.Panda3DWorld import Panda3DWorld
from QPanda3D.QPanda3DWidget import QPanda3DWidget
# import PyQt5 stuff
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
#from panda3d.core import Point3, Vec3, Vec4, VBase4
#from direct.interval.LerpInterval import LerpHprInterval
#from direct.interval.IntervalGlobal import *
from direct.gui.OnscreenImage import OnscreenImage
from rpcore import RenderPipeline ################
class PandaTest(Panda3DWorld):
'''
This is the class that defines our world
It inherits from Panda3DWorld that inherits from
Panda3D's ShowBase class
'''
def __init__(self):
Panda3DWorld.__init__(self)
self.render_pipeline = RenderPipeline() ###########
self.render_pipeline.create(self) #############
#self.win.setClearColorActive(True)
#self.win.setClearColor(VBase4(0, 0.5, 0, 1))
self.render_pipeline = RenderPipeline() ###########
self.render_pipeline.create(self) ###########
self.render_pipeline.daytime_mgr.time = "17:30" ###########
model = self.loader.load_model("salle_expo_001.bam") ###########
model.reparent_to(self.render) ###########
self.render_pipeline.prepare_scene(model) ###########
model.setScale(1, 1, 1) ###########
self.x = 0 ###########
self.y = 0 ###########
self.z = self.posZ_camera ###########
model.setPos(self.x, self.y, self.posZ_modele) ###########
self.cam.setPos(0, 0, self.posZ_camera) ###########
self.cam.setFov(102) ###########
if __name__ == "__main__":
world = PandaTest()
app = QApplication(sys.argv)
appw=QMainWindow()
appw.setGeometry(50, 50, 800, 600)
pandaWidget = QPanda3DWidget(world)
appw.setCentralWidget(pandaWidget)
appw.show()
sys.exit(app.exec_())
… and this is the error I get:
(panda3d_py_3_7) angelo@angelo-kubuntu:~/Documents/Python/Panda3D$ python qpanda_world.py
[>] CORE rpcore.native imported
[>] CORE Using panda3d-supplied core module
Known pipe types:
glxGraphicsPipe
(1 aux display modules not yet loaded.)
[>] RenderPipeline Using Python 3.7 with architecture linux_amd64
[>] RenderPipeline Using Panda3D 1.10.11 built on Jan 7 2022 09:44:03
[>] RenderPipeline Using git commit d66ef59ecc0ca1078e2dc9629984f9d08bfee806
[>] MountManager Auto-Detected base path to /home/angelo/miniconda3/envs/panda3d_py_3_7/lib/python3.7/site-packages
[!!!] RenderPipeline You constructed your own ShowBase object but you
did not call pre_show_base_init() on the render
pipeline object before! Checkout the 00-Loading the
pipeline sample to see how to initialize the RP.
[>] MountManager Cleaning up ..
Ah, I see!
Looking over at one of the samples for RenderPipeline, I see that it specifically notes that one isn’t supposed to call the constructor for ShowBase, as RenderPipeline does this itself.
I thus looked at the code for RenderPipeline, and specifically, what it does and what its comments instruct in its “create” and “_init_showbase” methods (the latter being called by the former). Based on this, it seems that what you want to do can be done if you simply construct RenderPipeline and then call its “pre_showbase_init” method all before calling the constructor for ShowBase–or in this case, “Panda3DWorld”.
Something like this, I think:
class PandaTest(Panda3DWorld)
def __init__(self):
self.render_pipeline = RenderPipeline()
self.render_pipeline.pre_showbase_init()
Panda3DWorld.__init__(self)
self.render_pipeline.create(self)
# The rest of your code then follows...
Hello Thaumaturge,
Thank you for your details.
I tried but in fact the scene does not appear in the container. Here is my code:
import sys
from rpcore import RenderPipeline
from direct.gui.OnscreenText import OnscreenText
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from QPanda3D.QMouseWatcherNode import QMouseWatcherNode
from QPanda3D.QPanda3DWidget import QPanda3DWidget
from QPanda3D.Panda3DWorld import Panda3DWorld
class Application(Panda3DWorld):
def __init__(self) :
self.render_pipeline = RenderPipeline()
self.render_pipeline.pre_showbase_init()
Panda3DWorld.__init__(self)
self.render_pipeline.create(self)
self.render_pipeline.daytime_mgr.time = "17:30"
model = self.loader.load_model("salle_expo_001.bam")
model.reparent_to(self.render)
self.render_pipeline.prepare_scene(model)
model.setScale(1, 1, 1)
#base.disableMouse()
model.setPos(0, 0, -0.7)
base.camera.setPos(0, 0, 0.7)
base.camLens.setFov(102)
if __name__ == "__main__":
world = Application()
app = QApplication(sys.argv)
appw = QMainWindow()
appw.setGeometry(50, 50, 1600, 900)
appw.setWindowTitle('Test Panda3DWorld/QPanda3DWidget')
main_widget = QWidget()
main_widget.setLayout(QVBoxLayout())
pandaWidget = QPanda3DWidget(world)
btn_widget = QWidget()
btn_widget.setMaximumHeight(50)
btn_widget.setLayout(QHBoxLayout())
main_widget.layout().addWidget(pandaWidget)
main_widget.layout().addWidget(btn_widget)
btn_jump = QPushButton("Bout 1")
btn_widget.layout().addWidget(btn_jump)
#btn_jump.clicked.connect(world.jump)
btn_roll = QPushButton("Bout 2")
btn_widget.layout().addWidget(btn_roll)
#btn_roll.clicked.connect(world.roll)
appw.setCentralWidget(main_widget)
appw.show()
sys.exit(app.exec_())
Here is the window.
That, I’m afraid, I don’t know about–I use neither QT (let alone QPanda3D) nor RenderPipeline, so I’m not at all familiar with getting them to interoperate.
At this point I think that I’ll bow out in favour of another forum-member hopefully chiming in, with my apologies!
It doesn’t matter, you’ve already helped me a lot!, It’s very nice of you.
Just for clarification if I replace QPanda3DWorld with ShowBase (with exactly the same code), the scene appears for a while then disappears with the error:
(panda3d_py_3_7) angelo@angelo-kubuntu:~/Documents/Python/Panda3D$ python ess_qpanda_world_002.py
[>] CORE rpcore.native imported
[>] CORE Using panda3d-supplied core module
[>] RenderPipeline Using Python 3.7 with architecture linux_amd64
[>] RenderPipeline Using Panda3D 1.10.11 built on Jan 7 2022 09:44:03
[>] RenderPipeline Using git commit d66ef59ecc0ca1078e2dc9629984f9d08bfee806
[>] MountManager Auto-Detected base path to /home/angelo/miniconda3/envs/panda3d_py_3_7/lib/python3.7/site-packages
[>] RenderPipeline Mount manager was not mounted, mounting now ...
[>] MountManager Setting up virtual filesystem
[>] MountManager Mounting auto-detected config dir: /home/angelo/miniconda3/envs/panda3d_py_3_7/lib/python3.7/site-packages/config/
[>] MountManager Mounting ramdisk as /$$rptemp
[>] RenderPipeline No settings loaded, loading from default location
Known pipe types:
glxGraphicsPipe
(1 aux display modules not yet loaded.)
[>] RenderPipeline Driver Version = 4.3.0 NVIDIA 390.151
[>] RenderPipeline Driver Vendor = NVIDIA Corporation
[>] RenderPipeline Driver Renderer = GeForce GTX 1070/PCIe/SSE2
[>] RenderPipeline Render resolution is 800 x 600
[>] LightManager Tile size = 24 x 16 , Num tiles = 34 x 38
[>] GPUCommandQueue Allocating command buffer of size 32768
[>] GroupedInputBlock Native UBO support = False
[!] RPLoader Loading '/$$rp/data/default_cubemap/cubemap.txo' took 309.05 ms
[!] RPLoader Loading '/$$rp/data/builtin_models/skybox/skybox.txo' took 112.16 ms
[>] PluginManager Loading plugin settings
[>] PluginManager Creating plugin instances ..
[>] Debugger Creating debugger
[>] plugin:scattering Loading scattering method for 'eric_bruneton'
[>] StageManager Setup stages ..
[>] StageManager Preparing stages ..
[>] AOStage Blur quality is MEDIUM
[>] StageManager Awaiting future pipe Exposure
[>] UpdatePreviousPipesStage Creating previous pipes stage ..
[>] StageManager Writing shader config
[!] RPLoader Loading '/$$rp/rpplugins/bloom/resources/lens_dirt.txo' took 114.6 ms
[>] plugin:pssm Initializing pssm ..
[>] ScatteringMethodEricBruneton Precomputing ...
[>] RenderPipeline Finished initialization in 1.453 s, first frame: 3
Traceback (most recent call last):
File "ess_qpanda_world_002.py", line 80, in <module>
pandaWidget = QPanda3DWidget(world)
File "/home/angelo/miniconda3/envs/panda3d_py_3_7/lib/python3.7/site-packages/QPanda3D/QPanda3DWidget.py", line 72, in __init__
self.panda3DWorld.set_parent(self)
AttributeError: 'Application' object has no attribute 'set_parent'
[>] MountManager Cleaning up ..
I’m afraid I’ll have to use Direct.Gui with the RenderPipeline first.
Do you know if there are QPanda3D developers here on the forums?
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It’s my pleasure; I’m glad to have helped.
I’m afraid that I don’t know, alas. That doesn’t mean that there are none, however!
I’m going to have other questions more specific to Panda3D. I will open other threads regarding this. I still need to make some progress in my project. 
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