AR Quick Look

[cvp]

AR Quick Look to display USDZ files of virtual objects in 3D or AR.
Download an example usdz file from f.i. here and run this quick and dirty script using a QLPreviewController.

from   objc_util import *
import os
import ui

# create delegate for QLPreviewController
def previewControllerDidDismiss_(_self, _cmd, _controller):
	global uiview
	#print('previewControllerDidDismiss_')
	uiview.close()
	
methods = [previewControllerDidDismiss_,]
protocols = ['QLPreviewControllerDelegate']
try:
	MyQLPreviewControllerDelegate = ObjCClass('MyQLPreviewControllerDelegate')
except:
	MyQLPreviewControllerDelegate = create_objc_class('MyQLPreviewControllerDelegate', methods=methods, protocols=protocols)

# create datasource for QLPreviewController
def numberOfPreviewItemsInPreviewController_(_self, _cmd, _controller):
	#print('numberOfPreviewItemsInPreviewController_ called')
	return 1

def previewController_previewItemAtIndex_( _self, _cmd, _controller, index):
	#print('previewController_previewItemAtIndex_ called, index=',index)
	global uiview
	return uiview.nsurl.ptr
	
methods = [numberOfPreviewItemsInPreviewController_, previewController_previewItemAtIndex_]
protocols = ['QLPreviewControllerDataSource']
try:
	MyQLPreviewControllerDataSource = ObjCClass('MyQLPreviewControllerDataSource')
except:
	MyQLPreviewControllerDataSource = create_objc_class('MyQLPreviewControllerDataSource', methods=methods, protocols=protocols)
	
@on_main_thread	
def MyQLPreviewController(ns_url, w, h, mode='sheet', popover_location=None):
	global uiview
	uiview = ui.View()
	uiview.frame = (0,0,w,h)
	uiview.background_color = 'white'
	if mode == 'sheet':
		uiview.present('sheet',hide_title_bar=False)
	elif mode == 'popover':
		if popover_location:
			uiview.present('popover', hide_title_bar=True, popover_location=popover_location)
		else:
			return
	else:
		return
		
	QLPreviewController = ObjCClass('QLPreviewController').new()
	#print(dir(QLPreviewController))
			
	# Use new delegate class:
	delegate = MyQLPreviewControllerDelegate.alloc().init()
	QLPreviewController.delegate = delegate		
	
	# Use new datasource class:
	datasource = MyQLPreviewControllerDataSource.alloc().init()
	QLPreviewController.dataSource = datasource
	
	QLPreviewController.setModalPresentationStyle_(3)
	
	objc_uiview = ObjCInstance(uiview)
	SUIViewController = ObjCClass('SUIViewController')
	vc = SUIViewController.viewControllerForView_(objc_uiview)	
	
	uiview.nsurl = ns_url	# used in datasource to display url

	vc.presentViewController_animated_completion_(QLPreviewController, True, None)
		
def main():
	# demo code	
	ns_url = nsurl(os.path.expanduser('~/Documents/wheelbarrow.usdz'))
	MyQLPreviewController(ns_url,600,500)

if __name__ == '__main__':
	main()

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