diff --git a/src/raymath.h b/src/raymath.h index c1c20c669..0e3b6042e 100644 --- a/src/raymath.h +++ b/src/raymath.h @@ -1439,21 +1439,22 @@ RMDEF void QuaternionToAxisAngle(Quaternion q, Vector3 *outAxis, float *outAngle } // Returns he quaternion equivalent to Euler angles -RMDEF Quaternion QuaternionFromEuler(float roll, float pitch, float yaw) +// NOTE: Rotation order is ZYX +RMDEF Quaternion QuaternionFromEuler(float yaw, float pitch, float roll) { Quaternion q = { 0 }; - float x0 = cosf(roll*0.5f); - float x1 = sinf(roll*0.5f); - float y0 = cosf(pitch*0.5f); - float y1 = sinf(pitch*0.5f); - float z0 = cosf(yaw*0.5f); - float z1 = sinf(yaw*0.5f); - - q.x = x1*y0*z0 - x0*y1*z1; - q.y = x0*y1*z0 + x1*y0*z1; - q.z = x0*y0*z1 - x1*y1*z0; - q.w = x0*y0*z0 + x1*y1*z1; + float cy = cosf(yaw*0.5f); + float sy = sinf(yaw*0.5f); + float cp = cosf(pitch*0.5f); + float sp = sinf(pitch*0.5f); + float cr = cosf(roll*0.5f); + float sr = sinf(roll*0.5f); + + q.x = sr*cp*cy - cr*sp*sy; + q.y = cr*sp*cy + sr*cp*sy; + q.z = cr*cp*sy - sr*sp*cy; + q.w = cr*cp*cy + sr*sp*sy; return q; }