tree 67fdd12296606508f31e5bba303a8a1a10b92457
parent 4abe76b5de3f8346bf4d03e2c842aa0c181e5408
author Jesse Barker <jesse.barker@linaro.org> 1350925310 -0700
committer Jesse Barker <jesse.barker@linaro.org> 1350925310 -0700

Mesh: Fix for a situation encountered during the development of SceneShadow.
In cases where a mesh will do "double duty" but not be used the same way in
all cases (in SceneShadow, the shader for the depth pass would ignore the
"normal" attribute), the GL can return a -1 for the attribute location, even
if it is declared in the shader (compilers are free to optimize away unused
attributes, etc.).  So, we check for this and don't try to enable attributes
whose location is -1.