3D in pythonista

SmartGoat

Hi everyone, I’m wondering about potentially create a game in 3D with Pythonista, and after some researchs I saw that it was possible to import SceneKit in objC. I have some questions:

how can I use this objC module in pythonista ? Cause I Didn’t understood anything from @omz 3D exemple which is 2 years old...
can I import blender objects or so with this module ?
if not, is there any other way/module to do 3D in pythonista ?
Is it hard to make my own 3D engine ? Which base knowledge do I need to make it ?

Thanks in advance for all of your answers, and Happy New Year !

cvp

@SmartGoat Have à look
here
And
here

cvp

@SmartGoat you can import .scn file with

    scene = SCNScene.sceneWithURL_options_(nsurl('double-cheese-burger.scn'),None)

cvp

from objc_util import *
import ctypes
import ui
import math
from ImageColor import getrgb
import os

load_framework('SceneKit')

SCNView, SCNScene, SCNBox, SCNNode, SCNSceneSource, SCNMaterial, SCNCamera, SCNLight, SCNAction, SCNLookAtConstraint = map(ObjCClass, ['SCNView', 'SCNScene', 'SCNBox', 'SCNNode', 'SCNSceneSource', 'SCNMaterial', 'SCNCamera', 'SCNLight', 'SCNAction',  'SCNLookAtConstraint' ])

@on_main_thread
def demo():
    main_view = ui.View()
    w, h = ui.get_screen_size()
    main_view.frame = (0,0,w,h)

    main_view_objc = ObjCInstance(main_view)
    scene_view = SCNView.alloc().initWithFrame_options_(((0, 0),(w, h)), None).autorelease()

    # transparent scene_view background, thus we see main_view background 
    scene_view.setBackgroundColor_(ObjCClass('UIColor').clearColor())
    scene_view.setAutoresizingMask_(18)
    scene_view.setAllowsCameraControl_(True)
    main_view_objc.addSubview_(scene_view)
    main_view.name = 'SceneKit Demo'
    
    scene = SCNScene.sceneWithURL_options_(nsurl('double-cheese-burger.scn'),None)
    scene_view.setScene_(scene)

    rotate_action = SCNAction.repeatActionForever_(SCNAction.rotateByX_y_z_duration_(0, math.pi*2, 0, 10))    
    root_node = scene.rootNode()
    for node in root_node.childNodes():
    	if str(node.name()) != 'camera':
    		node.runAction_(rotate_action)    
    
    main_view.present(hide_title_bar=True)

demo()

SmartGoat

Thanks @cvp for this, now I know we can import files and load them in pythonista. Although, I encounter a problem of shader rendering with original @omz example:
[http://imgur.com/D2OOKtE]
Does anyone know how to fix it ?
Thanks in advance

cvp

@SmartGoat comment this line or try another type like directional

    #light.setType_('spot')

cvp

@SmartGoat this one is nice also

    light.setType_('omni')

SmartGoat

Thanks @cvp, last question (maybe):
Is it possible to use SceneKit in the Scene module or only in ui ?

cvp

@SmartGoat I'm sorry but I'll leave other (a lot smarter) guys answer, I have never used Scene in my own scripts...

cvp

@SmartGoat Ha, also, I've tried to load a .dae file in Pythonista SceneKit, but without any success. As soon I try to get the scene.rootNode, I get an error because scene is None 😢

    #scene = SCNScene.sceneWithURL_options_(nsurl('double-cheese-burger.scn'),None)
    scene = SCNScene.sceneWithURL_options_(nsurl('deer.dae'),None)
    scene_view.setScene_(scene)
    root_node = scene.rootNode()

mikael

@SmartGoat, you can use views in a scene, see the scene docs, ”Integration with the ui Module”.