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Wrong distance from vertical plane in AR QuickLook for USDZ with more than one object
Hi! I created manually USDZ with one cube to anchoring on wall (vertical plane) #usda 1.0 ( defaultPrim = "Root" metersPerUnit = 1 upAxis = "Y" ) def Xform "Root" ( assetInfo = { string name = "Root" } kind = "component" ) { def Xform "Geom" ( prepend apiSchemas = [ "Preliminary_AnchoringAPI" ] ) { # token preliminary:anchoring:type = "plane" # token preliminary:planeAnchoring:alignment = "vertical" matrix4d xformOp:transform = ( (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0.2, 1) ) def Xform "Group" { def Cube "cube_0" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } } } } It's displayed correct in ARQuickLook When I add second cube to USD(z) #usda 1.0 ( defaultPrim = "Root" metersPerUnit = 1 upAxis = "Y" ) def Xform "Root" ( assetInfo = { string name = "Root" } kind = "component" ) { def Xform "Geom" ( prepend apiSchemas = [ "Preliminary_AnchoringAPI" ] ) { # token preliminary:anchoring:type = "plane" # token preliminary:planeAnchoring:alignment = "vertical" matrix4d xformOp:transform = ( (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0.2, 1) ) def Xform "Group" { def Cube "cube_0" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } def Cube "cube_1" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0.3, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } } } } ARQuickLook display scene ~ 10 cm from wall, and then scene have more cubes we see increased distance from wall. Here for two cubes I also tryed recreate scene in Reality Composer on iPhone. Everything ok for one cube, and ok when preview in App(ARKit?) for two cubes, but when export scene in RealityComposer macOS to USDZ we again see wrong distance for two cubes and more. For tests I use iPhone 13 Pro Max with iOS 16.3.1
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724
Jul ’23
Playground CGContext nil
Hi! When run below code in iOS blank Playground import UIKit let contextBig = CGContext(     data: nil,     width: 560,     height: 560,     bitsPerComponent: 8,     bytesPerRow: 2240,     space: CGColorSpace(name: CGColorSpace.sRGB)!,     bitmapInfo: CGImageAlphaInfo.premultipliedFirst.rawValue) print (contextBig as Any) Result in console: Optional(CGContext 0x600003cc0540 (kCGContextTypeBitmap) CGColorSpace 0x600002ddc300 (kCGColorSpaceICCBased; kCGColorSpaceModelRGB; sRGB IEC61966-2.1) width = 560, height = 560, bpc = 8, bpp = 32, row bytes = 2240  kCGImageAlphaPremultipliedFirst | 0 (default byte order) | kCGImagePixelFormatPacked (default) ) But when change width and height to 561, result in console: nil Is there for playground some memory limits or etc? Xcode - Version 12.3 (12C33)
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1.5k
Feb ’21