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Merge pull request #1022 from qsantos/fix-small-angle-quaternion-zero-test
Fix handling of small magnitude quaternions #1022
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@ -56,7 +56,11 @@ namespace glm
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//Prevent a division by 0 error later on
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T VectorMagnitude = x.x * x.x + x.y * x.y + x.z * x.z;
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if (glm::abs(VectorMagnitude - static_cast<T>(0)) < glm::epsilon<T>()) {
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//Despite the compiler might say, we actually want to compare
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//VectorMagnitude to 0. here; we could use denorm_int() compiling a
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//project with unsafe maths optimizations might make the comparison
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//always false, even when VectorMagnitude is 0.
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if (VectorMagnitude < std::numeric_limits<T>::min()) {
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//Equivalent to raising a real number to a power
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return qua<T, Q>(pow(x.w, y), 0, 0, 0);
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}
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