CODEWITHSUNDEEP
c++quaternionsglm-matheuler-angles
St_rt_la
St_rt_la

Reputation: 25

Convert glm::quat to glm::vec3 of Euler angles?

How to convert glm::quat data to glm::vec3 angles?

Example: I've start data:

glm::vec3 start = glm::vec3(90, 30, 45);

and after convert to quat

(0,730946)(0,016590)(0,677650)

.... How to convert quat to glm::vec3(90, 30, 45) ??? And get initial data (90, 30, 45)

Upvotes: 1

Views: 66

Answers (1)

Alon Alush
Alon Alush

Reputation: 1089

Use the built-in glm::eulerAngles() function and then convert the resulting radians back to degrees.

#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/quaternion.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtx/euler_angles.hpp> // glm::eulerAngles()

int main()
{
    glm::vec3 startDegrees = glm::vec3(90.0f, 30.0f, 45.0f);
    glm::vec3 startRadians = glm::radians(startDegrees);
    glm::quat q = glm::quat(startRadians);
    glm::vec3 eulerRads = glm::eulerAngles(q);
    glm::vec3 eulerDegs = glm::degrees(eulerRads);

    return 0;
}

Upvotes: 5

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