Animation of rotation around axis using quaternions

cocos2d-x C++
#1

Hi, everyone!
Very interesting how to create animation of rotation sprite3D using quaternions. The goal is to rotate an sprite3D in 90 degree increments around the axes x and y. Use classes RotateBy or RotateTo it,s not good idea for this task.
Maybe it’s someone else has already implemented?
Thanks a lot!

Rotate Sprite3D by World Axis, not Local Axis
#2

Hi.

I have created RotateGlobalBy action which extends from ActionInterval.
For example:

RotateGlobalBy* RotateGlobalBy::create(float time, Vec3 angles)
{
return new RotateGlobalBy(time, angles);
}

RotateGlobalBy::RotateGlobalBy(float time, Vec3 angles)
{
this->initWithDuration(time);
this->autorelease();

this->angles = angles;
}

RotateGlobalBy::~RotateGlobalBy()
{
}

void RotateGlobalBy::startWithTarget(Node* target)
{
ActionInterval::startWithTarget(target);

this->target = target;
this->rotation = this->target->getRotationQuat();
}

void RotateGlobalBy::update(float time)
{
auto rotation = this->rotation;

rotation *= Quaternion(this->target->getWorldToNodeTransform() * Vec3::UNIT_X, CC_DEGREES_TO_RADIANS(this->angles.x * time));
rotation *= Quaternion(this->target->getWorldToNodeTransform() * Vec3::UNIT_Y, CC_DEGREES_TO_RADIANS(this->angles.y * time));
rotation *= Quaternion(this->target->getWorldToNodeTransform() * Vec3::UNIT_Z, CC_DEGREES_TO_RADIANS(this->angles.z * time));

this->target->setRotationQuat(rotation);
}