glm - Decompose mat4 into translation and rotation?

Question

For purposes of lerping I need to decompose a 4x4 matrix into a quaternion and a vec3. Grabbing the quaternion is simple, as you can just pass the matrix into the constructor, but I can't find a way to grab the translation. Surely there must be a way?

Answer 1

It looks like glm 0.9.6 supports matrix decomposition http://glm.g-truc.net/0.9.6/api/a00204.html

#include <glm/gtx/matrix_decompose.hpp>

glm::mat4 transformation; // your transformation matrix.
glm::vec3 scale;
glm::quat rotation;
glm::vec3 translation;
glm::vec3 skew;
glm::vec4 perspective;
glm::decompose(transformation, scale, rotation, translation, skew, perspective);