Quaternion camera

camera.cpp

const vec3 Camera::axisV = {0.f, 1.f, 0.f};
const vec3 Camera::axisF = {0.f, 0.f, 1.f};

mat4 Camera::getView(const vec3& pos, const quat& rot) const
{
	vec3 up = rot * axisV;
	vec3 forward = rot * axisF;
	return glm::lookAt(pos, pos + forward, up);
}

control.cpp

void PlayerControl::update(EntityManager& es, EventManager& evm, f32 dt)
{
	vec3 dir {};
	f32 mul = 1.0f;
	if(keys[GLFW_KEY_W]) dir += vec3(0,0,1);
	if(keys[GLFW_KEY_S]) dir += vec3(0,0,-1);
	if(keys[GLFW_KEY_D]) dir += vec3(-1,0,0);
	if(keys[GLFW_KEY_A]) dir += vec3(1,0,0);

	if(keys[GLFW_KEY_C]) dir += vec3(0,-1,0);
	if(keys[GLFW_KEY_SPACE]) dir += vec3(0,1,0);

	if(mod & GLFW_MOD_SHIFT) mul *= 2.0;

	vec3 rot {};
	if(keys[GLFW_KEY_UP])    rot.x += -1;
	if(keys[GLFW_KEY_DOWN])  rot.x +=  1;
	if(keys[GLFW_KEY_LEFT])  rot.y +=  1;
	if(keys[GLFW_KEY_RIGHT]) rot.y += -1;
	if(keys[GLFW_KEY_DELETE])    rot.z += -1;
	if(keys[GLFW_KEY_PAGE_DOWN]) rot.z +=  1;

	ComponentHandle<Controllable> ctrl;
	ComponentHandle<Position> pos;
	ComponentHandle<Motion> mov;

	for(const Entity& e: es.entities_with_components(ctrl, pos))
	{
		quat rota {};
		rota *= glm::angleAxis(glm::radians(rot.x), glm::vec3(1,0,0));
		rota *= glm::angleAxis(glm::radians(rot.y), glm::vec3(0,1,0));
		rota *= glm::angleAxis(glm::radians(rot.z), glm::vec3(0,0,1));
		pos->dir *= rota;
	}

	for(const Entity& e: es.entities_with_components(ctrl, pos, mov))
	{
		mov->v = pos->dir * dir * mul;
	}
}