GLSL sometimes fails to read attribute locations. about opengl-js HOT 4 CLOSED

Update -- upon further notice, this issue seems to not happen on Windows because on Linux the GLSL compiler and linker is optimizing away the dummy part of the code, so the "col" attribute name is implicitly being removed by the compiler for optimizations on Linux. So that is why it cannot find it.

from opengl-js.

I suppose it's "fixed" as of this commit:
cedfe27

Though I spent hours thinking how to fix it without doing that change, as it's something of a pseudo-hack and normally to 100% be sure and prevent undefined behavior, you should be querying the GLSL attribute locations with a string op. However, vertex and color attributes were hard-coded internally to the old, deprecated OpenGL implementations, so maybe defaulting to dummy_col_ID = 1; isn't such an inaccurate fix.

Guess I leave the issue open in case somebody else can complain that there is a better way than mine, though writing high-level deprecated functions on top of modern OpenGL functions adds that extra dimension of complexity to the problem.

from opengl-js.

f9442dd

Actually, if this works, it would be the even better fix for this anyway, with slight performance improvements in the wrapper JS functions (my gl.js engine).

from opengl-js.

Fixed additionally by resorting to the new, manual tactics in this commit: da630c7

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