init

include/glm/ext/quaternion_transform.inl

@@ -0,0 +1,24 @@
+namespace glm
+{
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER qua<T, Q> rotate(qua<T, Q> const& q, T const& angle, vec<3, T, Q> const& v)
+	{
+		vec<3, T, Q> Tmp = v;
+
+		// Axis of rotation must be normalised
+		T len = glm::length(Tmp);
+		if(abs(len - static_cast<T>(1)) > static_cast<T>(0.001))
+		{
+			T oneOverLen = static_cast<T>(1) / len;
+			Tmp.x *= oneOverLen;
+			Tmp.y *= oneOverLen;
+			Tmp.z *= oneOverLen;
+		}
+
+		T const AngleRad(angle);
+		T const Sin = sin(AngleRad * static_cast<T>(0.5));
+
+		return q * qua<T, Q>::wxyz(cos(AngleRad * static_cast<T>(0.5)), Tmp.x * Sin, Tmp.y * Sin, Tmp.z * Sin);
+	}
+}//namespace glm
+