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authorkwolekr <kwolekr@minetest.net>2016-05-11 03:47:45 -0400
committerkwolekr <kwolekr@minetest.net>2016-05-27 23:23:58 -0400
commitb1eb757e60c155707b8fc1b2497b632246819c7b (patch)
tree96e9b35b1e0f2b300f379a2703f659130cdab534 /src/particles.cpp
parent5b05f75a272ede582d7f86d8dbbbf7bc81e81970 (diff)
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Fix undefined evaluation order when constructing random vectors
MSVC and GCC evaluate parameters in right-to-left order, whereas Clang evaluates in left-to-right order, and of course, an optimization could leave the order of evaluation completely indeterminate. This commit fixes all instances of the error by explicitly assigning the results of expressions that use PseudoRandom::next() or range() to their respective vector components. The right-to-left evaluation behavior is preserved since Clang is much less commonly used to compile Minetest than GCC and MSVC combined, and would therefore cause the least harm.
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