defold-orthographic/Monarch/Collection factory screens - unloading issues

toca · September 28, 2024, 7:58am

i’m using monarch, i have 2 screen:

screen A - Homepage

Screen B - proper game (mixture of gui and game objects, that uses the ortographic camera)

Screen B is created with a collection factory

if i’m in the screen A and i go to screen B everything works.

when i transition from my game (screen B) to screen A using:
monarch.show(hash(“A”), {clear = true })

i get this

`ERROR:SCRIPT: orthographic/camera.lua:695: attempt to index local ‘camera’ (a nil value)
stack traceback:
orthographic/camera.lua:695: in function send_view_projection
orthographic/camera.script:75: in function <orthographic/camera.script:71>

ERROR:SCRIPT: orthographic/camera.lua:296: attempt to index a nil value
stack traceback:
orthographic/camera.lua:296: in function final
orthographic/camera.script:60: in function <orthographic/camera.script:59>`

Since that moment when i go back from screen A to B, the camera works randomly, sometimes it does, sometimes it doesnt.

Am i missing something on how i should handle the camera in a collection that is managed by monarch and uses collection factory?

Chung_Xa · September 29, 2024, 2:07am

It seems you need to do something with the camera when the screen disposed

toca · September 29, 2024, 6:19am

I agree, it does seems i need to dispose the camera, but i can’t find any documentation about it.

toca · September 29, 2024, 7:19am

i have resolved removing the defold-ortographic extension, and using the native camera.

Lodrasyll · January 13, 2026, 6:18pm

now this problem i meet too what is the solution？@britzl

britzl · January 13, 2026, 6:21pm

Can you please create an issue on GitHub in defold-orthographic and include a minimal sample project?

Lodrasyll · January 13, 2026, 6:26pm

sure！

Lodrasyll · January 14, 2026, 8:03am

github.com/britzl/defold-orthographic

Black screen and nil error when switching collections back using Monarch with Orthographic render

opened 07:59AM - 14 Jan 26 UTC

LOONGHORN

[orthographic issue.zip](https://github.com/user-attachments/files/24607953/orth…ographic.issue.zip) Description I encountered a potential issue when using Monarch for screen/collection transitions together with the defold-orthography camera and render script. Problem Switching from level collection to next_level collection works correctly Switching back from next_level to level causes the screen to turn black The issue only happens when using the Orthographic render script Switching back to the default render script makes the issue temporarily disappear (not fully confirmed) In addition, a Lua error is sometimes thrown (for example when pressing ESC to exit the game, or during other uncertain operations). Because I am not familiar with Defold render script internals yet, I am unable to debug or fix this on my own. Error message ERROR:SCRIPT: orthographic/camera.lua:249: attempt to index a nil value stack traceback: orthographic/camera.lua:249: in function final orthographic/camera.script:66: in function <orthographic/camera.script:65> Steps to reproduce Use Monarch to switch between collections Start in level collection Move the player using up / down / left / right Walk into grass to trigger transition to next_level In next_level, press Backspace to return to level Screen becomes black and the error may appear Expected behavior Switching back and forth between collections should work correctly without black screen or camera errors. Actual behavior Black screen when switching back orthographic/camera.lua throws a nil value error

thanks for reply! this is my issue but after test many time I change orthography camera go’s name in next level collection and it is work finally..
so Is it turns out the issue was a singleton conflict caused by having identical camera IDs across different level collections?
anyway thanks!