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SbVec4d(const double v[4]);
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SbVec4d(const double x, const double y, const double z, const double w);
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double dot(const SbVec4d& v) const;
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SbBool equals(const SbVec4d& v, const double tolerance) const;
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void getReal(SbVec3d& v) const;
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void getValue(double& x, double& y, double& z, double& w) const;
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double length(void) const;
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SbVec4d& setValue(const double v[4]);
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SbVec4d& setValue(const double x, const double y, const double z,
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double& operator [](const int i);
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const double& operator [](const int i) const;
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SbVec4d& operator *=(const double d);