Bug 232169 – iOS15 Internal error compiling shader with Metal backend.

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: WebGL

Production iOS 15 throws:
"THREE.WebGLProgram: shader error:  1281 35715 false gl.getProgramInfoLog Internal error compiling shader with Metal backend"

When using aframe particle-system component.

Unresolved as of 10/22/21
Github Issue:
https://github.com/IdeaSpaceVR/aframe-particle-system-component/issues/61

note the error codes do not seem to be consistent, but using the particle-system component will cause crashes or blatant shader glitches in iOS15.

[Kimmo Kinnunen]

Thank you for the report.
Could you link to a simple reproduction? Either a url that runs the particular component or a simple html+js package reproducing the issue?
I could not any examples from the project website with a cursory investigation.

Live Examples
https://ideaspacevr.github.io/aframe-particle-system-component/

[Kyle Piddington]

Dup of  https://bugs.webkit.org/show_bug.cgi?id=229378

If you need an immediate workaround...

The problem here is that the function name 'and' is conflicting with a metal symbol. We've fixed this in ToT Webkit.

To fix this, rename the 'and' function below to something else.

// float and(float a, float b) {
//     return a * b;

*** This bug has been marked as a duplicate of bug 229378 ***

[Kyle Piddington]

Thank you for the report ! I really appreciate it.